what happens to the temperature of the substance while it is changing phase? explain how that makes sense. describe what is happening microscopically to the substance.
Answers
The temperature of the substance while it is changing phase is that the temperature remains constant. what happening microscopically to the substance is that the speed of the particle increases with increase in the temperature.
The temperature of the substance while it is changing the phase is that the temperature remains constant because the all the energy is used up in the process and no heat is released and absorbed. The particles motion increases or the kinetic energy of the particle is increases with increases in the temperature.
Thus, The temperature of the substance while it is changing phase is that the temperature remains constant. what happening microscopically to the substance is that the speed of the particle increases with increase in the temperature.
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Related Questions
A 0.425g sample of propane was mixed with excess oxygen in a calorimeter containing 98.72 g of water. The system was ignited and the temperature rose from 18.29ºC to 26.85ºC. The chemical equation for this reaction is :
C3H8 + 02 --> 3CO2 + 4H2O
Calculate the molar enthalpy of propane in J/mol
Answers
A 0.425g sample of propane was mixed with excess oxygen in a calorimeter containing 98.72 g of water. The system was ignited and the temperature rose from 18.29ºC to 26.85ºC. the molar enthalpy of propane is 393851.1 J/mol
The mass of propane = 0.425 g
molar mass of propane = 44 g/mol
moles = mass / molar mass
= 0.425 / 44
= 0.009 mol
ΔH = mc ΔT
ΔH = n ΔHsol
ΔHsol = mc ΔT / n
= 98.72 × 4.18 ( 26.85 - 18.29 ) / 0.009
molar enthalpy of solution = 393851.1 J/mol
Thus, A 0.425g sample of propane was mixed with excess oxygen in a calorimeter containing 98.72 g of water. The system was ignited and the temperature rose from 18.29ºC to 26.85ºC. the molar enthalpy of propane is 393851.1 J/mol
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What volume is equivalent to 14,000 mm3
Answers
1.4 x 10^-5m^3
Explanation:
mm3 is shorter than unit than m3
Classify each of the following as homogeneous or heterogeneous.
a. a door
b. the air you breathe
c. a cup of coffee (black)
d. the water you drink
e. salsa
f. your lab partner
Answers
a and e are heterogeneous (door and salsa), b, c, and d are homogeneous (air, black coffee, and pure water), and f cannot be classified as it pertains to a person rather than a substance or mixture. Option A and E
a. A door: Heterogeneous. A door is typically made up of various materials such as wood, metal, glass, etc. These materials have different properties and can be easily distinguished, making the door a heterogeneous object.
b. The air you breathe: Homogeneous. Air is a mixture of gases, primarily nitrogen, oxygen, carbon dioxide, and trace amounts of other gases. On a macroscopic scale, air appears uniform and consistent throughout, making it a homogeneous mixture.
c. A cup of coffee (black): Homogeneous. A cup of black coffee consists of water and coffee solutes that are evenly distributed throughout the liquid. It appears uniform and consistent, indicating a homogeneous mixture.
d. The water you drink: Homogeneous. Pure water, without any dissolved substances or impurities, is a homogeneous substance. It is composed of H2O molecules that are uniformly distributed throughout the liquid.
e. Salsa: Heterogeneous. Salsa is a mixture of various ingredients such as tomatoes, onions, peppers, and spices. These ingredients have different textures, colors, and sizes. The different components can be visually distinguished, making salsa a heterogeneous mixture.
f. Your lab partner: Heterogeneous. A lab partner refers to a person, and individuals are not considered homogeneous or heterogeneous in the same sense as substances or mixtures. They are complex beings with different physical characteristics, thoughts, and behaviors. Thus, categorizing a lab partner as homogeneous or heterogeneous is not applicable in this context. Option A and E
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Ethan has a cupcake tray that holds 24 cupcakes. he has batter for one more cupcake. What limiting factor is this most closely relates to in the environment
Answers
Answer:
space
Explanation:
The limiting factor that the illustration closely relates to in the environment is space.
Limiting factors are environmental factors that hinder the population of living organisms living in that environment from reaching their maximum reproductive capacity, also known as biotic potential. Limiting factor include space, foods and other environmental resources such as sunlight, nutrients, etc.
In the illustration, the cupcake tray can only hold 24 cupcakes while Ethan has batter for 25 cupcake. The tray thus is limited in space and as a result, one cupcake batter is left floating. The has limited the production capacity of the cupcake batter.
2 moles of NO, was placed in an empty I dm' bottle and allowed to reach equilibrium according to the equation:
At equilibrium, 1.2 moles of N,O, dissociated. Calculate the value of the equilibrium constant for the reaction at that
temperature.
Answers
2NO(g) ⇌ N2(g) + O2(g)
According to the problem statement, 2 moles of NO were placed in a 1 dm^3 bottle and allowed to reach equilibrium, and at equilibrium, 1.2 moles of NO had dissociated. This means that the initial concentration of NO was:
[NO]initial = 2 mol / 1 dm^3 = 2 M
And the concentration of NO at equilibrium is:
[NO]equilibrium = (2 - 1.2) mol / 1 dm^3 = 0.8 M
Since the stoichiometry of the balanced equation is 2:1:1 for NO, N2, and O2, respectively, the equilibrium concentrations of N2 and O2 will also be 0.6 M.
The equilibrium constant (Kc) can be calculated using the equilibrium concentrations of the reactants and products, raised to the power of their stoichiometric coefficients. Therefore:
Kc = ([N2][O2]) / ([NO]^2)
Substituting the equilibrium concentrations into the equation, we get:
Kc = (0.6 M x 0.6 M) / (0.8 M x 0.8 M)
Kc = 0.5625
Therefore, the value of the equilibrium constant for the reaction at that temperature is 0.5625. Note that the units of Kc depend on the stoichiometry of the balanced equation. Since the stoichiometric coefficients are all 1, the units of Kc in this case are M^-1
Which of the following molecules is/are expected to form hydrogen bonds in the liquid state or solid state: h2so4, hf, ch3oh, ch2o (formaldehyde)? a. h2so4 and hf b. ch3oh and ch2o c. hf, ch3oh, and ch2o d. h2so4, hf, ch3oh, and ch2o
Answers
Option D, "H2SO4, HF, CH3OH, and CH2O", is the correct answer. All four molecules are expected to form hydrogen bonds in either the liquid state or solid state due to their polar nature and the presence of highly electronegative atoms like oxygen or fluorine, which can form hydrogen bonds with hydrogen atoms in neighboring molecules.
The molecules that are expected to form hydrogen bonds in the liquid state or solid state are those that contain hydrogen bonded to either nitrogen, oxygen, or fluorine. Out of the given options, ch3oh (methanol) and ch2o (formaldehyde) are the only molecules that fit this criterion. Therefore, the answer is b. ch3oh and ch2o. H2SO4 and HF do not form hydrogen bonds in their solid state because they are ionic compounds, and the hydrogen is not bonded to a highly electronegative element.
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hi help me pls i don't know this
Answers
Explanation:
A ammonium B sulphate C nitrate D phosphate
1.40 L solution was made by mixing 69.3 mL of dioxane, Which has a density of 1.03 g/mL, and 1.3 L of Toluene, Which has a density of 0.87 g/mL. Calculate the volume percent of dioxane in the solution. Be sure your answer has the right number of significant digits.? %(v/v)
Answers
To calculate the volume percent of dioxane we will apply the following formula:
\(Volumepercent=\frac{\text{Volume of solute}}{Volume\text{ of solution}}\times100\)In this case, the solute will be dioxane, and the volume will be 69.3 mL.
To calculate the volume of solution we will sum both volumes:
Volume of solution = Volume of dioxane + Volume of Toluene
Volume of solution = 69.3 mL + 1300 mL
Volume of solution = 1369.3 mL
\(Volumepercent=\frac{\text{6}9.3\text{ mL}}{1369.3\text{ mL}}\times100\text{ = 5.1}\)We are given all the data with a significant digit, therefore we must report the result also with a significant digit. So the answer will be.
The volume percent of dioxane in the solution is 5.1 %(v/v)
Some of the brine is encapsulated within ice crystals, but most is trapped in the spaces between neighboring crystals. When air temperature falls below 0°C, the brine migrates downward, toward the higher water temperatures below. Eventually, the high-density brine drains into the water beneath the ice. In the process, the sea ice freshens while the salinity of the underlying water. and becomes
a increases less dense
b
increases
more dense
c. decreases less dense
d. decreases
more dense
Answers
The high-density brine drains into the water beneath the ice and in the process, the sea ice freshens while the salinity of the underlying water decreases, becoming less dense (Option C).
Sea ice is usually less salty than the ocean water it freezes from. During the process of ice formation, salt in the ocean water is expelled from the ice as it grows; most of the salt is ejected into the ocean but some remain trapped inside pockets of brine within the ice. When the air temperature falls below the freezing point of seawater (usually around -1.8 °C), water molecules start to form ice crystals, which grow and aggregate into a solid sheet of ice.
During this process, the salt rejected by the growing ice also accumulates, causing the salinity of the remaining brine to increase. Some of the brine is encapsulated within ice crystals, but most are trapped in the spaces between neighboring crystals.
Thus, the correct option is C.
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what is the area of triangle ABC with vertices A(x¹,y¹), B(x²,y²)and C (x³,y³)??????????
Answers
Answer:
\(Area = \frac{1}{2}|x_1(y_2 - y_3)+x_2(y_3 - y_1)+x_3(y_1 - y_2)|\)
\(Area = 2\ units^2\)
Explanation:
Given
\(A = (x_1,y_1)\)
\(B = (x_2,y_2)\)
\(C = (x_3,y_3)\)
Required
Determine the area
The area of a triangle is :
\(Area = \frac{1}{2}|A_x(B_y - C_y) + B_x(C_y - A_y) + C_x(A_y - B_y)|\)
By substituting values for the x and y coordinates of A, B and C;
We have:
\(Area = \frac{1}{2}|x_1(y_2 - y_3)+x_2(y_3 - y_1)+x_3(y_1 - y_2)|\)
So:
For instance
\(A = (0,3)\)
\(B= (2,1)\)
\(C = (2,3)\)
The area is:
\(Area = \frac{1}{2}|0(1-3) + 2(3-3) + 2(3-1)|\)
\(Area = \frac{1}{2}| 2*0 + 2*2|\)
\(Area = \frac{1}{2}| 0 + 4|\)
\(Area = \frac{1}{2}|4|\)
\(Area = \frac{1}{2} * 4\)
\(Area = 2\ units^2\)
which of the following statements is true regarding triacylglycerols? they are an ester of glycerol and three fatty acids.
triacylglycerols that are oils contain mostly unsaturated fatty acids.
they function as a storage form of lipid.
they cannot be hydrolyzed.
Answers
The statement "they cannot be hydrolyzed" about triacylglycerols is NOT true.
Triacylglycerols can be hydrolyzed, in fact. Triacylglycerols are enzymatically broken down into glycerol and specific fatty acids through a process known as lipolysis. Lipases, which cleave the ester bonds between glycerol and fatty acids, aid in hydrolysis.
Once hydrolyzed, the free fatty acids can be utilized in other metabolic processes or to produce energy. Triacylglycerols have a crucial role as an energy storage form in organisms, offering an easily accessible energy source when needed. This role is facilitated by their capacity to undergo hydrolysis.
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The complete question is:
Which of the following statements about triacylglycerols is NOT true.
they are an ester of glycerol and three fatty acids.
triacylglycerols that are oils contain mostly unsaturated fatty acids.
they function as a storage form of lipids.
they cannot be hydrolyzed.
which of the 9 molecules had the strongest intermolecular forces? use your data to determine your answer.
Answers
Firstly, to know the answer Identify the types, Compare the strength, Consider the size and shape and Determine the molecule has the strongest.
In general, to determine the strongest intermolecular forces in a set of molecules, follow these steps:
1. Identify the types of intermolecular forces present in each molecule (e.g., dispersion forces, dipole-dipole interactions, or hydrogen bonding).
2. Compare the strength of these forces among the molecules. In general, hydrogen bonding > dipole-dipole > dispersion forces.
3. Consider the size and shape of the molecules, as larger molecules and more complex shapes can have stronger dispersion forces.
4. Determine which molecule has the strongest overall intermolecular forces based on your analysis.
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Identify the product(s) of the following reaction:
H
2
2
CO
3
3
→ H
2
2
O + CO
2
2
A
H
2
2
CO
3
3
B
H
2
2
and O
3
3
C
H
2
2
O and CO
2
2
D
O and O
2
2
Answers
Answer:
H20
Explanation:
means water but might not help
pls answer this asap thankyou
Balance the chemical equation using linear algebra technique. PC15 + H₂O → H3PO4 + HCl 1) Create a matrix or put in vector form by the assignment of the variables P CI given: 1 PCl5 + 2 H₂O3 H3PO4 + 24 HCl i.e. â = H O 2) Set the equation zero and show your augmented matrix form. Ac = Ô 3) Solve the system using row operations and simplify the solutions (assign a convenient value if a free variable exists to express solutions as set of integers). 4) Enter the coefficients into the chemical equation: PC15 + H₂O H3PO4 + HCI
Answers
To balance the chemical equation PC15 + H2O → H3PO4 + HCl using linear algebra technique, we can set up an augmented matrix and solve the system of equations. Here's the step-by-step process:
Create a matrix or put it in vector form by assigning variables to P, Cl, H, O: Let's assign:
P = x (coefficient for PCl5)
Cl = y (coefficient for HCl)
H = z (coefficient for H3PO4)
O = w (coefficient for H2O)
The equation becomes: xPCl5 + yH2O → zH3PO4 + wHCl Set up the equation in matrix form:
| PCl5 | + | H2O | = | H3PO4 | + | HCl |
| 1 | + | 0 | = | 0 | + | 0 |
| 0 | + | 2 | = | 0 | + | 0 |
| 0 | + | 0 | = | 1 | + | -1 |
| 0 | + | 0 | = | 0 | + | 24 |
This gives us the augmented matrix form:
| 1 0 0 0 0 |
| 0 1 2 0 0 |
| 0 0 0 1 -1 |
| 0 0 0 0 24 |
Solve the system using row operations: Performing row operations to simplify the augmented matrix:
R2 = R2 - 2R1
R4 = R4 / 24
The simplified augmented matrix becomes:
| 1 0 0 0 0 |
| 0 1 0 0 0 |
| 0 0 0 1 -1 |
| 0 0 0 0 1 |
From the simplified matrix, we can assign values to the variables:
P = 0
Cl = 0
H = 0
O = 0
This implies that the coefficients for PCl5, H2O, H3PO4, and HCl are all zero. Enter the coefficients into the chemical equation: The balanced chemical equation is:
0PCl5 + 0H2O → 0H3PO4 + 0HCl
Therefore, the balanced equation is: PCl5 + H2O → H3PO4 + HCl (unbalanced)
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What is the volume (mL) of 6.0 M HCl that must be added to the 0.10 M HEPES to achieve the desired pH of 8.0
Answers
To achieve a desired pH of 8.0, approximately 19.17 mL of 6.0 M HCl must be added to 1 L of 0.10 M HEPES solution.
To calculate the volume of 6.0 M HCl required, we can use the Henderson-Hasselbalch equation, which relates the pH of a buffer solution to the pKa and the ratio of the concentrations of the conjugate acid and base.
The Henderson-Hasselbalch equation is given by:
pH = pKa + log([A-]/[HA])
In this case, HEPES acts as a buffer and has a pKa value. The conjugate base of HEPES is A-, and the acid form is HA. We want to achieve a pH of 8.0, and the pKa of HEPES is approximately 7.55.
By rearranging the equation, we get:
log([A-]/[HA]) = pH - pKa
Taking the antilog of both sides, we have:
[A-]/[HA] = 10^(pH - pKa)
Substituting the given values, we get:
[A-]/[HA] = 10^(8.0 - 7.55)
[A-]/[HA] = 3.162
Now, the concentration of [A-] and [HA] depends on the initial concentration of the HEPES solution. Let's assume we have 1 L of 0.10 M HEPES, so the concentration of [A-] is 0.10 M and the concentration of [HA] is 0.10 M.
To calculate the volume of 6.0 M HCl required, we can set up a proportion:
0.10 M / 0.10 M = (0.10 M + x mL * 6.0 M) / (0.10 M)
Simplifying the equation, we get:
1 = 0.10 + 6.0x
6.0x = 0.90
x = 0.90 / 6.0
x ≈ 0.15 L
x = 150 mL
Therefore, approximately 150 mL of 6.0 M HCl needs to be added to 1 L of 0.10 M HEPES to achieve the desired pH of 8.0.
To achieve a pH of 8.0 in a 1 L solution of 0.10 M HEPES, approximately 150 mL of 6.0 M HCl should be added. It is essential to handle the corrosive HCl with caution and take appropriate safety measures.
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13. What does 2n^2 stand for?
Answers
Answer:
2n² is a formula that determines that the maximum number of electrons should be accommodated in a particular shell.
Explanation:
if the solar system were used as a model of an atom, what would the sun most likely represent
Answers
Here, we are required to determine what the sun will most likely represent if the solar system were used as a model of an atom.
The center of the solar system which happens to be the sun will most likely represent the nucleus of the atom.
Atoms are made up a positively charged nucleus in the center and a set of electrons revolving round them. The nucleus of an atom contains protons and neutrons and is located at the center of the atom.As such, if the solar system were used as a model of an atom, the sun will most likely represent the nucleus of the atom.
This is so because the solar system is basically made up of the sun and the planets with the planets revolving in their orbit around the sun.
Consequently, the center of the solar system which happens to be the sun will most likely represent the nucleus of the atom.
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The yield of a chemical process is being studied. From previous experience, yield is known to be normally distributed and σ=3 . The past five days of plant operation have resulted in the following percent yields: 91.6, 88.75, 90.8, 89.95, and 91.3.
a. Find a 95% two-sided confidence interval on the true mean yield. b. Find a 95% upper level confidence interval on the true mean yield. c. How many samples of yield is needed to obtain a 95% two-sided confidence interval with width 1? d. If we don't know the value of σ , how would the 95% two-sided confidence interval be?
Answers
The two-sided confidence interval is (87.85 ≤ μ ≤ 93.11) , with 87.85 being the lower level and 93.11 being the upper level.
What is a yield in an experiment?The amount of product you actually get after doing an experiment is known as the experimental yield. Calculating the % yield will show you how much of the theoretical yield you actually achieved in a particular experiment. The quantity of pure and dry product produced in a chemical reaction is known as the reaction yield (absolute yield). The relative or percentage yield (%) is typically determined in order to assess the effectiveness of a chemical process in organic synthesis.
How is the yield of a chemical reaction determined?The percent yield can be calculated by applying the following formula:%yield = (actual yield/theoretical yield) x 100.
Brifieng:Step-by-step explanation:
Given the data:
91.6, 88.75, 90.8, 89.95, 91.3
Mean, m = Σx / n
n = sample size = 5
Mean = 452.4 / 5 = 90.48
Standard deviation, σ = 3
Zcritical at 95% = 1.96
Confidence interval :
Mean ± Error margin
Error margin = Zcritical*σ/sqrt
Error margin = 1.96 * 3/sqrt(5)
Error margin = 2.630
Lower boundary : 90.48 - 2.630 = 87.85
Upper boundary : 90.48 + 2.630 = 93.11
(87.85 ; 93.11)
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Can you explain why one row ends and another one
starts? In the periodic table
Answers
Answer: because
Explanation:h
how
to calculate average mass of a proton in an element (e.g.
potassium)?
Answers
Tthe average mass of a proton in potassium is 2.059 u/proton.
In order to calculate the average mass of a proton in an element (e.g. potassium), you need to follow these steps :
Step 1 : Find the atomic number of the element, which is the number of protons in the nucleus of the atom.
For potassium, the atomic number is 19. Therefore, there are 19 protons in the nucleus of a potassium atom.
Step 2: Find the isotopes of the element and their relative abundances.
Potassium has three naturally occurring isotopes : potassium-39 (93.26%), potassium-40 (0.01%), and potassium-41 (6.73%).
Step 3:Find the mass of each isotope, which is the sum of the protons and neutrons in the nucleus.
Potassium-39 has 39 - 19 = 20 neutrons
potassium-40 has 40 - 19 = 21 neutrons
potassium-41 has 41 - 19 = 22 neutrons.
Therefore, the masses of the isotopes are : potassium-39 (39.0983 u), potassium-40 (39.963 u), and potassium-41 (40.9618 u).
Step 4: Use the relative abundances of the isotopes and their masses to calculate the average mass of a proton in the element.
The formula for calculating the average atomic mass of an element is :
average atomic mass = (mass of isotope 1 × relative abundance of isotope 1) + (mass of isotope 2 × relative abundance of isotope 2) + (mass of isotope 3 × relative abundance of isotope 3) + ...
Using the masses and relative abundances of the isotopes of potassium, we get :
average atomic mass = (39.0983 u × 0.9326) + (39.963 u × 0.0001) + (40.9618 u × 0.0673) = 39.102 u
Therefore, the average mass of a proton in potassium is 39.102 u / 19 protons = 2.059 u/proton.
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matching question match the number of outer electron groups correctly to the molecular shape observed. 4 bonding pairs 4 bonding pairs drop zone empty. 3 bonding pairs and 1 lone pair 3 bonding pairs and 1 lone pair drop zone empty. 2 bonding pairs linear 2 bonding pairs and 2 lone pairs 2 bonding pairs and 2 lone pairs drop zone empty. 3 bonding pairs
Answers
4 Bonding Pairs: The molecular shape observed for four bonding pairs is a tetrahedral shape. 3 Bonding Pairs: The molecular shape observed for three bonding pairs is a trigonal planar shape.
What is molecular shape?Molecular shape is the three-dimensional arrangement of the atoms that make up a molecule. It is determined by the number of electrons in the outermost energy level of the molecule's atoms, which is known as the valence shell. The shape of a molecule is determined by the electron-pair repulsion theory.
2 Bonding Pairs and 2 Lone Pairs: The molecular shape observed for two bonding pairs and two lone pairs is a bent shape. This means that the molecule is shaped like a "V" with two corners. Each of the two corners is the result of a single covalent bond connecting two atoms. The two lone pairs are located on the two "arms" of the "V" shape.
3 Bonding Pairs and 1 Lone Pair: The molecular shape observed for three bonding pairs and one lone pair is a trigonal pyramidal shape. This means that the molecule is shaped like a pyramid, with three corners. Each of the three corners is the result of a single covalent bond connecting two atoms. The lone pair is located at the fourth corner of the pyramid.
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The solubility of ZnCO3 in water is quite low. What could you add to increase the solubility? Explain fully how your method would work.
Answers
There is a way to decrease the concentration of an ion here. The carbonate ion happens to be easy to decrease. All we have to do is add some acid (say HCl) to the container. The following sequence of reactions explains how this WO r ks.
As long as more acid is added, this process will continue until all the solid Zn CO3 has been dissolved
The accepted value of ksp is 1.2×10^−12 for Ag2CrO4. Calculate the percentage error if your experimentally determined value for ksp was 1.7×10^−10.
Answers
Original value = 1.2 x 10^-12
Mistaken value = 1.7 x 10^-10
%error = | [(1.2 x 10^-12) - (1.7 x 10^-10)] | / 1.2 x 10^-12 x 100%
%error = (1.688 x 10^-10 / 1.2 x 10^-12) x 100%
%error = 1.172222222 x 10^17
you have 1000g of iron oxide you have 800g of water which reactant is ur limiting reagant
Answers
Explanation:
1. First, let's rewrite the equation:
FeO + H2O --> Fe(OH)2
1 mole of FeO react with one mole of H2O producing 1 mole of Fe(OH)2.
Let's transform 1000g of FeO and 800 g of H2O into moles using: n = m/MM
MM of FeO = 72 g/mol
MM of H2O = 18 g/mol
n FeO = 1000/72
n FeO = 13.89 moles
n H2O = 800/18
n H2O = 44.4 moles
We can see that we have less moles of FeO than of water. The ratio between them is 1:1, so FeO is our limiting reactant.
Answer 1: FeO is the limiting reactant.
2. To calculate the theoretical yield, we need to use the number of moles of the limiting reactant, which is 13.89.
So it will be produced 13.89 moles of Fe(OH)2, since the ratio between FeO and Fe(OH)2 is 1:1.
So let's transform 13.89 moles of Fe(OH)2 into grams:
m = n*MM
MM of Fe(OH)2 = 90 g/mol
m = 13.89*90 = 1250.1 g of Fe(OH)2
Answer 2: Theoretical yield = 1250 g of Fe(OH)2
4. The excess reactant is H2O.
After the reaction, it will left 44.4 - 13.89 = 30.51 moles of H2O.
It is in grams:
m = n*MM
m = 30.51*18
m = 549 g
Answer: 549 g
can anyone just help me with these
Identify the following compounds as either ionic (I)or Covalent (c)
Answers
Explanation:
3 C
4 C because bonds of non-metal to non-metal N to O
5 I because metal ion loss valence electron Ca2+ non-metal gains valence electron F-
WILL GIVE BRAINLIEST TO PERSON WHO ANSWERS FASTEST AND CORRECT BUT ANY ANSWERS TO JUST GET POINTS WILL GET REPORTED AND DELETED
Which is an example of condensation? *
5 points
A) water boiling in a pot
B) water being absorbed by plants
C) salt being removed from water
D) moisture on a mirror after a hot shower
Answers
Answer:
a
Explanation:
Answer:
D
Explanation:
what is formed when oxyhaemoglobin splits
Answers
Explanation:
The haem is in turn split into iron , which forms chemical compounds as part of the blood iron pool available for future hemoglobin synthesis...
hope this help !!
A hypothesis is made before the experiment is conducted.
True or fasle
Answers
It should be at beginning. A hypothesis is called an educated guess of what might happen in the experiment.
Please brainliest
Answer:
false
Explanation:
what is the requirements to obtain citizenship?
please answer it correctly
Answers
Answer:
Age. ...
Residency. ...
Residence and Physical Presence.
Good Moral Character.
Attachment to the Constitution.
Language.
U.S. Government and History Knowledge.
Oath of Allegiance.
These are some requirements for obtaining citizenship .
Culture
Race
Background
What is the mass of an object, when the volume of it is 50.0 mL and the density is 1.5
g/mL?
Answers
Answer:
75 g
Explanation:
Mass=Density x Volume so therefore you do the density which is 1.5 g/mL times the volume which is 50.0 mL so you get 75 g because the mL cancel out in the label!