identify each described physical separation technique. a liquid is carefully poured out, leaving the solid behind in the container
Answers
A liquid is gently poured out, leaving the solid in the container, in a process known as decantation.
What is decantation?
The process of decanting is used to separate mixtures of incompatible liquids or liquid and solid mixtures, such as suspensions. The liquid that is closer to the top of the container—the less dense of the two liquids or the liquid from which the precipitate or sediment has settled out—is poured off, leaving the other component or the denser liquid of the mixture behind.
During the separation of two immiscible liquids, an imperfect separation is observed. Decantation, to put it simply, is the process of shifting the top layer of immiscible materials to another container in order to separate the contents.
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Related Questions
A 2 kg bowling pin is at rest. A 6 kg bowling ball is rolling towards it at 10 m/s. If the ball
transfers all of it's momentum to the pin, what is the velocity of the pin after the collision?
Answers
P1 = P2 and since momentum is conserved, 21 = (6.0)(2.77) + (0.70). (vpin). 4.38 = 0.70 vpin, vpin = 6.3 m/s to the right, 21 = 16.62 + 0.70 vpin,
How do you determine a bowling ball's force?The bowling ball is solely affected by friction, hence Ff is used in place of F and equals mass times acceleration. The normal force (mass times gravity) multiplied by the friction coefficient equals the friction force, which also equals mass times acceleration.
How is ball velocity determined?The falling ball travels a distance of d = 12 9.8 (m/s2) t2, with a speed of v = 9.8 (m/s2) t as a function of time. The ball travels 4.9 m in a second. The falling ball's velocity is v = -9.8 (m/s2) t j, and its position is r = (4.9 m - 12 9.8 (m/s2) t2) j as a function of time.
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When performing an extraction with between an aqueous solution and organic solution what determines which layer ends up the bottom layer in the separatory funnel ?.
Answers
When performing an extraction between an aqueous solution and an organic solution or organic compound, density will determine the layer ending up at the bottom of the separation funnel.
In chemistry, a separatory funnel is a kind of funnel that separates two immiscible liquids.
It is a transparent funnel and when two immiscible liquids i.e aqueous and organic solution is poured into it, and then allowed to stand, after a while a distinguished layer is formed setting them apart from each other.
Due to the difference in density, the extraction becomes easier as the aqueous layer has a low density and stays at the top while the organic layer is at the bottom.
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what part of the electromagnetic spectrum was first developed during ww2
Answers
Answer:
Radio waves were first developed in WWII
Explanation:
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Dogada gerceklesen kimyasal tepkimeler ornekler
Answers
Answer:
Combustion (burning) of wood.
The metabolism of food in the body.
Cooking an egg
Digesting sugar with the amylase in saliva.
Explanation:
Here are some example, I hope this helped!
(Ahşabın yanması (yanması).
Vücuttaki gıda metabolizması.
Yumurta pişirmek
Tükürükteki amilaz ile şekeri sindirmek.)
We wish to determine how many grams
of solid silver chromate will precipitate
when 150. mL of 0.500 M silver nitrate
solution is added to excess potassium
chromate.
2AgNO3(aq)
How many moles of AgNO3 are present
in 150. mL of 0.500 M AgNO3?
+ K₂ CrO4 (aq) → Ag₂ CrO4(s) + 2KNO3(aq)
Answers
Approximately 12.45 grams of solid silver chromate will precipitate when 150 mL of 0.500 M silver nitrate solution is added to excess potassium chromate.
To determine the number of moles of AgNO3 present in 150 mL of a 0.500 M AgNO3 solution, we can use the formula:
moles = concentration × volume
Given:
Concentration of AgNO3 solution = 0.500 M
Volume of AgNO3 solution = 150 mL
First, we need to convert the volume from milliliters (mL) to liters (L) since the concentration is given in moles per liter (M).
1 L = 1000 mL
Therefore, the volume of the AgNO3 solution in liters is:
150 mL × (1 L / 1000 mL) = 0.150 L
Now we can calculate the moles of AgNO3 using the formula:
moles = concentration × volume
moles = 0.500 M × 0.150 L
moles = 0.075 mol
So, there are 0.075 moles of AgNO3 present in 150 mL of the 0.500 M AgNO3 solution.
Now, let's proceed to determine how many grams of solid silver chromate (Ag2CrO4) will precipitate when the AgNO3 solution reacts with excess potassium chromate (K2CrO4).
From the balanced chemical equation:
2AgNO3(aq) + K2CrO4(aq) → Ag2CrO4(s) + 2KNO3(aq)
We can see that the molar ratio between AgNO3 and Ag2CrO4 is 2:1. Therefore, for every 2 moles of AgNO3, we will form 1 mole of Ag2CrO4.
Since we have 0.075 moles of AgNO3, we can calculate the moles of Ag2CrO4 formed:
moles of Ag2CrO4 = 0.075 mol / 2 = 0.0375 mol
To determine the mass of Ag2CrO4, we need to multiply the moles by its molar mass. The molar mass of Ag2CrO4 is calculated by summing the atomic masses of each element in the compound:
Ag2CrO4 = 2(Ag) + 1(Cr) + 4(O) = 2(107.87 g/mol) + 1(52.00 g/mol) + 4(16.00 g/mol) = 331.87 g/mol
mass of Ag2CrO4 = moles of Ag2CrO4 × molar mass of Ag2CrO4
mass of Ag2CrO4 = 0.0375 mol × 331.87 g/mol = 12.45 g
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Bromination if isobutane is a two step reaction… is what I have in the image correct?
Answers
The enthalpy of 1st ,second and overall reaction are - 34 kJ/mol , 98 kJ/mol and 64 kJ/mol .
The bond enthalpy of each steps are determined as ;
enthalpy of step 1 is calculated as ,
Enthalpy = bond dissociation energy of product - bond dissociation energy of reactant .
Enthalpy = 366 - 400
Enthalpy = - 34 kJ/mol
enthalpy of step 2 is calculated as ,
Enthalpy = bond dissociation energy of product - bond dissociation energy of reactant .
Enthalpy = 292 - 194
Enthalpy = 98 kJ/mol
enthalpy of step 2 is calculated as ,
Enthalpy = bond dissociation energy of product - bond dissociation energy of reactant .
enthalpy of step overall reaction is calculated as ,
Enthalpy = bond dissociation energy of product - bond dissociation energy of reactant .
Enthalpy = (292+ 366 ) - ( 194 + 400 )
Enthalpy = 64 kJ/mol
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For the below equation, balance and determine the ratios listed below:
Answers
Answer:
The balanced chemical equation is:
\(2Al_2O_3\operatorname{\rightarrow}4Al+3O_2\)- Ratio of Al2O3 to O2: 2:3R
- Ratio of Al2O3 to Al: 2:4R
- Ratio of Al to O2: 4:3R
Explanation:
To balance the chemical equation, it is necessary to have the same amount of elements on the reactant side as on the product side:
\(2Al_2O_3\rightarrow4Al+3O_2\)Now we know that the reaction is balanced, because on the reactant side and on the products side there are:
- 4 Al
- 6 O
Now that the equation is balanced, we can write the ratios with the stoichiometry of the reaction.
Determine the products of the reaction between tin(ii) oxalate and lithium chloride
Answers
The reaction between tin (II) oxalate and lithium chloride is that it forms tin (II) chloride and lithium oxalate, which are the products of the reaction. The balanced chemical equation for the reaction is SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4.
Tin (II) oxalate reacts with lithium chloride to form a precipitate of tin (II) chloride and lithium oxalate. The reaction between tin (II) oxalate and lithium chloride is given below.
SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4
The balanced chemical equation for the reaction is as follows:
SnC₂O₄ + 2 LiCl → SnCl₂ + Li₂C₂O4 .
SnC₂O₄ is tin (II) oxalate, while LiCl is lithium chloride.
SnCl₂ is tin (II) chloride, while Li₂C₂O4 is lithium oxalate.The products of the reaction between tin (II) oxalate and lithium chloride are tin (II) chloride and lithium oxalate. Tin (II) chloride is a white crystalline powder that is soluble in water, whereas lithium oxalate is a white solid that is insoluble in water.The reaction between tin (II) oxalate and lithium chloride is a double displacement reaction, which is also known as a metathesis reaction. When a double displacement reaction takes place, two compounds exchange their cations and anions, resulting in the formation of two new compounds.
The reaction is a double displacement reaction or metathesis reaction where two compounds exchange their cations and anions to form two new compounds.
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Ms. Sloan's students are studying changes and heat energy in science. They have recently made models of the water cycle and learned how the sun can turn liquid water into steam. They also took some ice cubes from the freezer and let them melt on the lab table. Next Ms. Sloan gave each group some sugar cubes. She asked each group to grind up the cubes. "What kind of change is this?" she asked. "A physical change!" the class responded. Next Ms. Sloan got out the hot plate and put some sugar cubes in a pan. She began heating the sugar cubes. How does this experiment compare to the changes the students have already seen in class? Responses A Heating the sugar did not affect the solid sugar cubes. B Heating the solid sugar cubes caused melting and a physical change to occur. C Heating the sugar caused something new to form and a chemical change to occur. D Heating the solid sugar cubes caused evaporation and the sugar disappeared.
Answers
According to the physical changes, heating the solid sugar cubes caused melting and a physical change to occur.
Physical changes are defined as changes which affect only the form of a substance but not it's chemical composition. They are used to separate mixtures in to chemical components but cannot be used to separate compounds to simpler compounds.
Physical changes are always reversible using physical means and involve a change in the physical properties.They involve only rearrangement of atoms and are often characterized to be changes which are reversible.
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11. Do the blue dots on the graph represent an object that
sinks or floats in the water? How do you
know?
a. Floats because the blue dots are all
above the line with a slope of 1 g/mL.
b. Floats because the blue dots are all
below the line with a slope of 1 g/mL.
c. Sinks because the blue dots are all above
the line with a slope of 1 g/mL.
d. Sinks because the blue dots are all below
the line with a slope of 1 g/mL.
Answers
I’m so sorry if it’s wrong!
Match each term below with its definition or description.
1 The point in a titration when the added amount of standard reagent is equal to the amount of analyte being titrated.
2 The analyte is titrated with the standard reagent and the volume of standard solution required to complete the reaction is measured.
3 A reagent that is pure and stable, which can be used directly after weighing.
4 The analyte that is being analyzed in the titration.
5 Standard reagent is added in excess to ensure complete reaction with the analyte. The excess reagent is then titrated with a second standard reagent.
6 A solution, whose concentration is known, often made from a reagent of known purity.
7 The standard reagent of known concentration that is added from a buret to the analyte solution.
8 The analyte does not react directly with the titrant so it is converted to another form which will react with the titrant.
9 The point in a titration when a change in the analyte solution is observed, indicating equivalency.
10 It is added to the analyte solution and aids in the observation of the completion of the reaction.
a) End Point
b) Indicator
c) Direct Titration
d) Back Titration
e) Indirect Titration
f) Primary Standard
g) Standard Solution
h) Titrand
i) Equivalence Point
j) Titrant
Answers
Answer:
1. Equivalence point
2. Direct titration
3. Primary standard
4. Titrand
5. Back titration
6. Standard solution
7. Titrant
8. Indirect titration
9. End point
10. Indicator
Explanation:
1. The equivalence point is the tiration point at which the quantity or moles of the added titrant is sufficient or equal to the quantity or moles of the analyte for the neutralization of the solution of the analyte.
2. Direct titration is a method of quantitatively determining the contents of a substance
3. A primary standard is an easily weigh-able representative of the mount of moles contained in a substance
4. A titrand is the substance of unknown concentration which is to be determined
5. The titration method that uses a given amount of an excess reagent to determine the concentration of an analyte is known as back titration
6. A standard solution is a solution of accurately known concentration
7. A titrant is a solution that has a known concentration and which is titrated unto another solution to determine the concentration of the second solution
8. Indirect titration is the process of performing a titration in athe reverse order
9. The end point is the point at which the indicator indicates that the equivalent quantities of the reagents required for a complete reaction has been added
10 An indicator is a compound used to visually determine the pH of a solution.
The titration has been the neutralization reaction in which the titrand and the titrant react to form the salt and the water and help in the determination of the qualitative and quantitative properties.
What is an Endpoint?In a titration reaction, the endpoint has been the point at which the equivalent amount of reagent has been completely neutralized.The Indicator has been the chemical that changes to indicate the endpoint of the reaction.Direct titration involves the reaction for the quantitative determination of the substances.The back titration can be given as the reaction in which the excess reagent is used to titrate the second standard reagent in the reaction.Indirect titration can be given as the reaction of the analyte to convert to another form and then the analysis with the titrant.The primary standard has been the known concentration of the pure and stable weighing reagent.The standard solution has been the solution of the known concentration in the reaction.Titrand has been the unknown sample that has to be analyzed.The equivalence point is the concentration point at which the quantity of titrant added to the titrand has been equal.Titrant has been the known concentration of sample that has been added to equivalent the unknown sample.Learn more about titration here:
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8
in the respiratory system
a.
bronchodilatation
b.
inspiration and expiration
is most affected by rib damage
C.
humidification of the air
d.
movement of mucus from lungs
Answers
Answer:8
in the respiratory system
a.
Explanation:
How much heat energy is required to heat a 100 g sample of liquid water from 30 °C to water vapor at 110 °C?The specific heat of liquid water is 4.184 J/(g K) and water vapor is 2.008 J/(g K). The heat of vaporization for water is 2259 J/g and the heat of fusion is 334.72 J/g
Answers
The total heat energy required is expressed according to the formula:
\(\begin{gathered} Q_T=Q_{\text{vap,w}}+Q_w \\ \end{gathered}\)where:
Qvap is the heat energy absorbed by the vapor
Qw is the heat energy absorbed by the water
Get the heat energy absorbed by the vapor at 100 degrees
\(\begin{gathered} Q_{\text{vap,w}}=n_w\times\triangle H_{vap,w} \\ Q_{\text{vap,w}}=\frac{mass}{molar\text{ mass}}\times\triangle H_{vap,w} \\ \end{gathered}\)Given the following parameters;
Mass of water = 100g
Molar mass of water (H2O) = 18.015g/mol
Hvap,w = 2259 J/g = 40.8 kJ/mol
Substitute the given parameters into the formula to have:
\(\begin{gathered} Q_{\text{vap,w}}=\frac{100\cancel{g}}{18.015\cancel{g}\cancel{\text{mol}^{-1}}^{}}\times\frac{40.8kJ}{\cancel{\text{mol}}} \\ Q_{\text{vap,w}}=226.48kJ \end{gathered}\)Get the heat absorbed by the water from 30 to 100 degrees and from 100 to 110 degrees using the formula below. Note that the water vapor is being heated without any phase changes, so we will be utilizing the specific heat capacity of water vapor.
\(\begin{gathered} Q_w=m_wc_w(\triangle\theta)_w+m_wc_w\triangle\theta \\ Q_w=(100\times4.184\times(100-30))+(100g\times2.008\frac{J}{g^oC}\times(110-100)^oC) \\ Q_w=(100\times4.184\times70)+(100\times2.008\times10) \\ Q_w=29,288+2008 \\ Q_w=31296\text{Joules} \\ Q_w=31.296kJ \\ \end{gathered}\)Get the total heat energy required;
\(\begin{gathered} Q_T=226.48kJ+31.296kJ \\ Q_T=257.776kJ \end{gathered}\)Which metal would have more luster, zinc (30) or scandium (21)?
Answers
Answer:
i say zinc would
Explanation:
How do organisms get energy from their environment?
Answers
Answer: They either eat other organisms or plants they take in the sun and water.
4. Why does ammonia, NH3, behave as a base when it reacts with an acid?
A It accepts a neutron and becomes NH3+.
B It accepts a proton and becomes NH4+.
OC It donates a proton and becomes NH2
Answers
B is the answer ,ammonium accepts a proton and becomes ammonium ion
Why is Hawaii made of volcanoes?
Answers
Answer:
Explanation:
The Hawaiian Islands were literally created from lots of volcanoes—they're a trail of volcanic eruptions. In the case of the Hawaiian Islands, the Pacific Plate is continually moving to the northwest over the Hawaiian hot spot. This movement caused the Hawaiian chain of islands to form.
of the molecules below, the bond in is the most polar. question 3 options: a) h2 b) hbr c) hcl d) hf e) hi
Answers
D. HF will have the most polar bond out of all the options.
As we see in the group from up to down the electronegativity of the substances decreases. The ability of an atom or functional group to draw electrons to itself is known as electronegativity in chemistry. An atom's electronegativity is influenced by both its atomic number and how far away from its charged nuclei its valence electrons are located.
A kind of covalent bond where the distribution of electrons between the two atoms is uneven. As a result, the molecule has a slight positive charge on one end and a slight negative charge on the other.
From all the compounds given here the fluorine atom has the highest electronegativity and hence it will most strongly attract the atoms towards itself and hence its bond with hydrogen will be the most polar.
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high-energy matter consisting of positively and negatively charged particles
Answers
High-energy matter consisting of positively and negatively charged particles is Plasma.
Plasma is high - energy matter consist of positively particles and negatively charged particles. This is the most common state of matter that is plasma state. Matter consisting negatively charged particles and positively charged particles and overall charge is neutral . Particles have high energy that when collide, electrons knocked loose from atom and forming positive ion and negative ion. particles are moving very fast in plasma state. Examples of plasma are stars, neon tubes , lightening bolts, fluorescent lights, fire.
Thus, High-energy matter consisting of positively and negatively charged particles is Plasma.
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How many atoms are present in a sample of Calcium (Ca) weighing 127.38g?
Answers
Answer:
1.9139 × 10²⁴ atoms Ca
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
127.38 g Ca
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of Ca - 40.08 g/mol
Step 3: Convert
\(127.38 \ g \ Ca(\frac{1 \ mol \ Ca}{40.08 \ g \ Ca} )(\frac{6.022 \cdot 10^{23} atoms \ Ca}{1 \ mol \ Ca} )\) = 1.91388 × 10²⁴ atoms Ca
Step 4: Check
We are given 5 sig figs. Follow sig fig rules and round.
1.91388 × 10²⁴ atoms Ca ≈ 1.9139 × 10²⁴ atoms Ca
The total number of calcium atoms in the expression 3 cos 2 shown in the equation 3 CaCl 2 +2Na 3 PO 4 Ca(PO 4 ) 2 +6 NaCl is:
Answers
Answer:
\(C\)Explanation:
Here, we want to calculate the percentage composition of the compound formed when oxygen reacts with iron
We have the equation of reaction as follows:
\(4Fe_{(s)}\text{ + }3O_{2(g)}\text{ }\rightarrow\text{ }2Fe_2O_{3(s)}\)The compound formed is Fe2O3
Now, let us get its percentage composition
The molar mass of the compound is 160 g/mol
The atomic mass of iron is 56 amu
The atomic mass of oxygen is 16 amu
Now, let us get the percentage composition:
\(\begin{gathered} \text{Iron = }\frac{2\times56}{160}\text{ }\times\text{ 100 \% = }70\text{ \%} \\ \\ \text{Oxygen = }\frac{3\times16}{160}\text{ = 30\% } \end{gathered}\)The closest here is thus the option C
The photoelectron spectra for H and He are represented at left. Which of the following statements best accounts for the fact that the peak on the He spectrum is farther to the left and higher than the peak on the H spectrum?answer choicesHe has an additional valence electron in a higher energy level than the valence electron in H .He has a greater nuclear charge than H and an additional electron in the same energy level.He has a completely filled valence shell in which the electrons are a greater distance from the nucleus than the distance between the H nucleus and its electron.It takes longer for the electrons in He to be removed due to the higher nuclear mass of He.
Answers
The answer is Option b .He has a greater nuclear charge than H and an additional electron in the same energy level
What is Photoelectron Spectroscopy (PES)?PES (photoelectron spectroscopy) is a method for figuring out how much energy electrons in atoms and molecules have relative to one another. PES is frequently used by scientists to examine molecular bonding or to find out what elements make up a material.
By ionising a sample and examining the kinetic energy distribution of the released photoelectrons, a technique called photoelectron spectroscopy (PES) investigates the composition and electronic state of the sample's surface region.By measuring the kinetic energy of photoelectrons to ascertain their binding energy, intensity, and angular distributions, it is possible to analyse the electronic structure of molecules. By detecting electrons rather than photons, it studies a substance's electrical structure, which sets it apart from traditional spectroscopy.The relative energy of electrons in atoms and molecules can be ascertained via photoelectron spectroscopy (PES). A PES spectrum is a graph of the photoelectron count vs binding energy.The electrons in an atom's various subshells are represented by PES peaks. The peaks with the lowest binding energies correspond to valence electrons, while the peaks with the highest binding energies correspond to core electrons.The photoelectron spectra of typical hydrogen-bonded complexesThe photoelectron spectra of typical hydrogen-bonded complexes had been seen in the gas phase. It was discovered that whereas the three higher occupied orbitals of the proton donor are destabilized by hydrogen-bond formation, the nonbonding orbital of the proton acceptor is greatly stabilized. The charge-transfer concept for the hydrogen bond is strongly supported by the significant orbital energy shifts brought on by hydrogen bond formation.
Eg : CF3COOH–(C2H5)2NCH3, CF3COOH–(n-C3H7)3N, CF3CF2COOH–(C2H5)2NCH3, and CF3CF2COOH–(n-C3H7)3N
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for kilograms of carbon monoxide (co) is contained in a rigid tank with a volume of 1 m3. the tank is fitted with a paddle wheel that transfers energy to the co at a constant rate of 14w for monoxide increases by 10 kj/kg. if no overall changes in kinetic and potential energy occur, determine
Answers
In a rigid tank with a volume of 1 m^3, carbon monoxide (CO) is contained. The tank is equipped with a paddle wheel that transfers energy to the CO at a constant rate of 14 W. The question asks us to determine the increase in CO's specific enthalpy if there are no changes in kinetic and potential energy.
First, we need to calculate the total power supplied to the CO. Since power is the rate of energy transfer, and it is constant at 14 W, the total energy transferred over time can be calculated using the formula: energy = power × time.
Next, we can calculate the change in specific enthalpy (Δh) using the formula:
Δh = energy / mass.
Finally, we can substitute the given value of 10 kJ/kg for Δh, and solve for the mass of CO using the formula: mass = energy / Δh.
The total energy transferred to the CO can be calculated as energy
= 14 W × time.
To find the change in specific enthalpy (Δh), we can use the formula
Δh = energy / mass.
Given that the change in specific enthalpy is 10 kJ/kg, we can solve for the mass of CO using the formula mass = energy / Δh.
By substituting the given value of 10 kJ/kg for Δh, we can find the mass of CO.
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Conventional hor-water beaters consiat of a tank of water malitained at a foxed temperature. The hot water ia to be used when needed The drawback is that energy is wasted because the tark loses heat Part A when it is not in use, and you can run out of hot What rate of heat inpet (either electical of from gas) is requited to operase woch a unit, assuring that all the he at goes water id you use too moch. Some unaty complaries are encouraging the use of on-demand water heaters (atwo knome as fiash heafers) which conse it No water lank is involved, 00 fo heat is wasted Ahpical householig shower Bow rate is 759mal/min(7.43 L/min )wed the tap water being hemed from 510P(10.C C ) to 11EP (A7 is' C) by the on denand heamer X Incorrect, Try Again; 9 attempts remaining
Answers
The rate of heat input required to operate an on-demand water heater, ensuring all the heat goes into the water without wastage, depends on the flow rate and the temperature rise needed.
Conventional hot-water heaters with a tank maintain a fixed temperature, resulting in heat loss when not in use and the possibility of running out of hot water. On the other hand, on-demand water heaters, also known as flash heaters, eliminate the need for a water tank and prevent heat wastage.
To determine the rate of heat input required for an on-demand water heater, two factors need to be considered: the flow rate of the water and the desired temperature rise. In this case, the flow rate is given as 7.43 liters per minute (or 759 ml/min), and the temperature rise is from 10.°C to 47°C.
To calculate the heat input, we can use the formula:
Heat Input = Flow Rate × Specific Heat Capacity × Temperature Rise
The specific heat capacity of water is approximately 4.18 Joules per gram per degree Celsius.
Converting the flow rate to grams per minute (1 liter of water = 1000 grams), we have:
Flow Rate = 7.43 liters/min × 1000 grams/liter = 7430 grams/min
Substituting the values into the formula, we get:
Heat Input = 7430 grams/min × 4.18 J/g°C × (47°C - 10°C)
Simplifying the equation:
Heat Input = 7430 × 4.18 × 37 Joules per minute
Therefore, the rate of heat input required for the on-demand water heater is 11,270.14 Joules per minute.
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When solid ice at 0 Celsius melts and becomes liquid water, there is no change in temperature while melting.
A. true
B. false
Answers
Answer:
True
Explanation:
It's true. All the energy that is absorbed is used to break the bonds from the solid ice to liquid water. The temperature remains at 0 while this process is going on.
Define the ground state of an atom
Answers
Explanation:
The nucleus of an atom is surround by electrons that occupy shells, or orbitals of varying energy levels. The ground state of an electron, the energy level it normally occupies, is the state of lowest energy for that electron. There is also a maximum energy that each electron can have and still be part of its atom.
10) What does mRNA copy and carry the code to produce? (1pt)
a) DNA
b) Proteins
Answers
Answer:
a
Explanation:
chemistry has no role in solving the problems of mankind true or false
Answers
what causes the outer layer of star to expand?
Answers
Answer/Explanation:
Stars spend the majority of their lifespan medling hydrogen nuclei together to form helium. When the hydrogen that in the core of the star begins to run out, the star will start using hydrogen away from its core and this is what causes the star's outer layer to expand and slowly cool down.
I hope this helps!
-No one
Which of the following are used to make
predictions?
hypotheses
laws
theories
Answers
Answer:A hypothesis is a tentative explanation that can be tested by further investigation. A theory is a well-supported explanation of observations. A scientific law is a statement that summarizes the relationship between variables. An experiment is a controlled method of testing a hypothesis.
Explanation:
Explanation: If the theory is true, it allows scientists to make predictions about what they observed.