Answers
Answer:
Answer is b gravity only
Related Questions
The elementary steps for the catalyzed decomposition of dinitrogen monoxide are:
N2O (g) + NO (g) → N2 (g) + NO2 (g)
2 NO2 (g) → 2 NO (g) + O2 (g)
Which of the following statements are CORRECT?
1. The overall balanced reaction is 2 N2O (g) → 2 N2 (g) + O2 (g).
2. NO (g) is a catalyst for the reaction.
3. N2 (g) is a reaction intermediate.
4. NO2 (g) is a reaction intermediate.
A. 1, 2, and 4
B. 1, 2, and 3
C. 1 and 2
D. 1 only
E. 4 only
Answers
The correct option for the catalyzed decomposition for given dinitrogen monoxide are- A. 1, 2, and 4
Explain the formation of dinitrogen monoxide?Nitrous oxide, also referred to as laughing gas, nitrous, simply nos, is a chemical substance that has the formula N2O and is also known as dinitrogen oxide as well as dinitrogen monoxide.
It is a colorless, nonflammable gas that tastes and smells mildly sweet at normal temperature. It is used as a sedative during medical and dental operations to assist patients feel more at ease and to reduce their anxiety. The melting point of dinitrogen monoxide is -88.48 °C.The fundamental procedures for dinitrogen monoxide's catalyzed breakdown are:
N2O (g) + NO (g) → N2 (g) + NO2 (g)
2 NO2 (g) → 2 NO (g) + O2 (g)
Thus, the correct statements are-
1. The overall balanced reaction is 2 N2O (g) → 2 N2 (g) + O2 (g).
2. NO (g) is a catalyst for the reaction.
4. NO2 (g) is a reaction intermediate.
Therefore, A. 1, 2, and 4 is the correct option.
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Write electron (subshell) configurations for the following atoms:
19K 35Br
Answers
Answer:
4s¹ and 3d¹⁰ 4s² 4p⁵
Explanation:
19K
Potassium has 19 electrons
The electron configuration for 19K is: 1s2 2s2 2p6 3s2 3p6 4s1
4s¹
35Br
Bromine has 35 electrons
The electron configuration for 35Br is: 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p5
3d¹⁰ 4s² 4p⁵
Which of the following is not a polymer
A. Glucose.
B. Starch.
C. Cellulose.
D. DNA.
Answers
Answer:
A. Glucose
Explanation:
Glucose is a monomer and not a polymer. So, option (A) is not a polymer.
Glucose is not a polymer because it is a kind of molecule while Starch , cellulose and DNA are polymers.
The correct answer is option A. Glucose.
Name the following ionic compounds. Use the periodic table, the table of common polyatomic ions, and
the transition metal charges chart found here.
Al₂O3:
I
Name
Formula and
Charge
DONE
Ammonium
NH4
Hydroxide
OH
Nitrate
Carbonate
NO3-
CO32-
SO,2-
PO, 3-
Sulfate
Phosphate
Answers
Answer: aluminum oxide
Explanation:
Answer:
aluminum oxide
Explanation:
To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance.
You will obtain a standard iron solution containing[ 0.2500g/L] of pure iron. Pipet 25.00mL of this standard iron solution into a 500mL volumetric flask and dilute up to the mark with distilled water. Finally, you will pipet certain amounts of this diluted solution into different flasks.
How much of this diluted solution do you need to pipet to have 0.00mg of iron?
Answers
To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.
In spectrophotometry, to plot the calibration curve, you need to prepare solutions with known concentrations and measure their absorbance.
We have a standard iron solution with a concentration of 0.2500g/L of pure iron (C₁). We pipet 25.00mL (V₁) of this standard iron solution into a 500mL (V₂) volumetric flask and dilute up to the mark with distilled water.
We can calculate the concentration of the diluted solution (C₂) using the dilution rule.
\(C_1 \times V_1 = C_2 \times V_2\\\\C_2 = \frac{C_1 \times V_1}{V_2} = \frac{0.2500 g/L \times 25.00 mL}{500 mL} = 0.0125 g/L\)
Then, if we wanted to prepare the blank, that is, the solution that contains the same matrix but not the analyte, and whose concentration in iron is 0.00 mg/L, we wouldn't pipet any of the diluted solution.
To plot the calibration curve, you need to prepare iron solutions with known concentrations and measure their absorbance. You need to pipet 0 mL of the diluted solution to have 0.00 mg of iron.
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Calculate the molarity of a solution made by dissolving 5.00 g of glucose (C6H12O6) in sufficient water to form exactly 100 mL of solution.
Answers
Answer:
\( 0.28 mol {dm}^{ - 3} \)
Explanation:
given; 5.00g equivalent to 100mL
5.00g = 100mL
convert 100mL to dm³
100mL is 100milliLitre
milli = 10^-3
100mL = 100 × (10^-3)
= 10^2 × 10^-3
=
\( {10}^{2 - 3} \)
= 10^-1 L
\(1l = 1 {dm}^{3} \)
therefore, 10^-1 L = 10^-1 dm³
Relative Atomic Mass of;
C=12, H=1, O=16
Molar mass of glucose (C6H12O6)
= 12×6 + 1×12 + 16×6
= 180g/mol
Now convert the mass given to mole using;
\(mole \: = \frac{mass}{molar \: mass} \)
\(mole \: = \frac{5.00}{180} \)
mole = 0.028 mol
therefore, 0.028 mol is equivalent to 10^-1 dm³
10^-1 dm³ = 0.028mol
divide both sides by 10^-1 to get 1dm³
\(1 {dm}^{3} = \frac{0.028 \: mol}{ {10}^{ - 1} } \)
= 0.28 mol
\(molarity \: = 0.28mol {dm}^{ - 3} \)
Which is an example of a compound?
С
Ar
He
Cus
Answers
6. Complete the equation for the dissociation of CdCl2(aq). Omit water from the equation because it is understood to be present.
Answers
The chemical equation for dissociation of cadmium chloride is CdCl₂\(_(aq)\) \(\rightarrow\)Cd\(^+_(aq)\) +2 Cl\(^-\)\(_(aq)\).
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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why is calcuim (ca) in group 2. period 4 on the periodic table
Answers
Answer:
Calcium (Ca) is in group 2 and period 4 on the periodic table be because Calcium has 2 valence electrons and 4 electron shell. Thus, calcium is a metal like all other group 2 element.
Explanation:
Can you help me with #2 based on the solutions from #1.
Answers
Answer:
• AgNO3 solution
- Reaction with copper (Cu):
\(undefined\)- Reaction with magnesium (Mg):
- Reaction with zinc (Zn):
- Reaction with tin (Sn):
• CuSO4 solution
- Reaction with copper (Cu):
- Reaction with magnesium (Mg):
- Reaction with zinc (Zn):
Explanation:
The given reactions are single replacement reactions, that is, the metal in the strips replaces the metal in the molecule of the solution.
• AgNO3 solution
- Reaction with copper (Cu):
- Reaction with magnesium (Mg):
- Reaction with zinc (Zn):
- Reaction with tin (Sn):
• CuSO4 solution
- Reaction with copper (Cu):
- Reaction with magnesium (Mg):
- Reaction with zinc (Zn):
gloves worn when working with liquid oxygen must be able to resist.
Answers
Answer:
What is your question?
Explanation:
Can you give more context to ur question?
Use the data in the table below to determine the atomic mass of copper.
Answers
To find the atomic mass of copper we have to multiply the atomic mass of each isotope times its corresponding abundance and then add them.
This way:
\(\begin{gathered} m=62.93amu\cdot0.6915+64.93amu\cdot30.85 \\ m=43.52amu+20.03amu \\ m=63.55amu \end{gathered}\)It means that the correct answer is 63.55 amu.
How force and motion alone with energy works?
Answers
A book on the floor has zero potential energy. When I pick it up and put it on the table, I do work on the book because I gave it more potential energy. Work = change in energy. That is why both work and energy are measured in Joules. To do the work I applied a force (equal to the weight of the book) to the book from the floor to the tabletop. Work equals the force times the distance, in units of Newtons times Meters. Therefore 1 Newton-Meter (NM) equals 1 Joule
how many grams of zinc would you need to produce 8.08 grams of hydrogen
Answers
Answer:
The reaction between zinc and hydrochloric acid produces hydrogen gas according to the following equation:
Zn + 2HCl → ZnCl2 + H2
This equation tells us that 1 mole of zinc reacts with 2 moles of hydrochloric acid to produce 1 mole of hydrogen gas. The molar mass of zinc is 65.38 g/mol, and the molar mass of hydrogen is 1.008 g/mol.
Using this information, we can set up the following proportion to find the number of grams of zinc needed to produce 8.08 grams of hydrogen:
1 mole Zn / 2 moles H2 = 65.38 g Zn / 1 mole Zn
x grams Zn / 8.08 g H2 = 65.38 g Zn / 1 mole Zn
Solving for x, we get:
x = (8.08 g H2) x (1 mole Zn / 2 moles H2) x (65.38 g Zn / 1 mole Zn)
x = 261.7 g
Therefore, you would need 261.7 grams of zinc to produce 8.08 grams of hydrogen.
Explanation:
Do step 3 as outlined in the lab guide. Record your results in the appropriate blanks.
A =
B =
C =
D =
E =
F =
G =
H =
Answers
Some tips to follow when doing lab practical are:
Avoid parallax errorsRecord your observations and data accuratelyUse the appropriate lab equipment.How do we know?From the table, Column 1 represents the time in half-life cycles, ranging from the initial state to 8 cycles. Column 2 shows the predicted number of radioactive atoms at each time point, based on the assumption that the number of atoms reduces by half in each half-life cycle.
Column 3 represents the simulated number of radioactive atoms at each time point and corresponds to the predicted values of the simulation.
In conclusion, the results as outlined in the lab guide are A= 27 B= 16 C= 9 D= 4 E= 2 F= 2 G= 0 H= 0.
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#complete question:
Do step 3 as outlined in the lab guide. Record your results in the appropriate blanks. A = B = C = D = E = F = G = H = A 3-column table with 9 rows. Column 1 is labeled Time half-life cycles, n with entries Initial, 1, 2, 3, 4, 5, 6, 7, 8. Column 2 is labeled Predicted radioactive atoms with entries 100, 50, 25, 13, 6, 3, 2, 1, 0. Column 3 is labeled Simulated radioactive atoms with entries 100, A, B, C, D, E, F, G, H.
what is the difference between ore and the gravel carried by the truck in the figure?
Answers
Shovels have the ability to load large quantities of material, but less than draglines whereas Ore is natural rock or sediment that contains one or more valuable minerals.
What is Ore?Typically, oxides, sulphides, silicates, or native metals like copper or gold are the minerals of interest. To separate the valuable components from the waste rock, ore must be treated. Numerous geological processes collectively known as ore genesis are responsible for the formation of ore deposits.
Most of the time, an ore is composed of a mixture of valuable minerals, undesired rocks, and other minerals, in addition to one or more ore minerals. Gangue is the name for the portion of an ore that cannot be avoided during mining but is not commercially viable. The processes of froth flotation, gravity concentration, and other ore dressing techniques remove the precious ore minerals from the gangue minerals.
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which explains how coolers work?
Answers
Answer:
Forgive me if im wrong but i am pretty sure the answer is C
Explanation:
when a KR-89 captures an electron, what is the particle that is formed?
Answers
When a Kr-89 captures an electron, the particle that is formed is bromine with atomic number of 35.
What is radioactivity?Radioactivity is the spontaneous emission of ionizing radiation as a consequence of a nuclear reaction, or directly from the breakdown of an unstable nucleus.
The radiation emitted includes the following;
gamma raysalpha particlesneutronselectronspositronsAn electron is a negatively charged subatomic particle that can be either bound to an atom or free (not bound). It has a charge of -1.
According to this question, when a Kr-89 captures an electron, the particle formed can be deduced as follows:
89/36Kr + 0/-1e = 89/35Br
This suggests that the particle formed when a particle of krypton captures an electron is bromine.
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Increased concentrations of greenhouse gases will lead to HIGHER global temperatures.
True
or
False
Answers
Answer:
\(\huge\boxed{\sf True}\)
Explanation:
If the concentrations of greenhouse gases keep increasing, They will absorb more and more long wave energy coming from the sun and radiating from the earth's surface and thus will cause an increase in temperature.
\(\rule[225]{225}{2}\)
Hope this helped!
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Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities (c)?
Answers
Explanation:
A substance's specific heat tells you how much heat must be added to / removed from a
1-g
sample of this substance in order to get its temperature to change by
1
∘
C
.
When energy in the form of heat is absorbed, a substance's specific heat tells you exactl;y how much heat is needed in order to increase the temperature of
1 g
of this substance by
1
∘
C
.
This means that the higher the specific heat of a substance, the more heat will be needed in order to get the temperature of
1 g
to increase by
1
∘
C
.
In your case, two substances, let's say
A
and
B
, start at the temperature,
200
∘
C
and they both absorb
150 J
of heat. Moreover, they both have the same mass.
If the specific heat of
A
is higher than the specific heat of
B
, you can say that it will take more energy to raise the temperature of
A
by
1
∘
C
than to raise the temperature of
B
by
1
∘
C
.
So, if
B
absorbs
150 J
and gets to a final temperature
T
B
, the fact that
A
has a higher specific heat will tell you that absorbing
150 J
of heat will not get the final temperature of
A
,
T
A
, to the same value as
T
B
.
You can thus say that
T
A
<
T
B
The substance with the lower specific heat will heat up more than the substance with the higher specific heat.
I think the complete question is:
Equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter. What is true of their heat capacities?
a) C(A) > C(B)
b) C(B) > C(A)
c) C(A) = C(B)
d) not enough info
When equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter, we can conclude that substance B has a lower heat capacity (a) C(A) > C(B)).
The heat capacity (C) is a physical property of matter, defined as the amount of heat (Q) to be supplied to an object to produce a unit change in its temperature (ΔT).
It can be represented through the following expression.
\(C = \frac{Q}{\Delta T }\)
Even though heat capacity is an extensive property, we can neglect that in this problem because we have the same masses of A and B. Substances A and B also absorb the same amount of heat.
We can see in the expression above, that there is an inverse relationship between C and ΔT, that is, B, which experiences a bigger temperature change, must have a lower heat capacity.
When equal amounts of heat are added to equal masses of substances A and B at the same temperature, but substance B gets hotter, we can conclude that substance B has a lower heat capacity (a) C(A) > C(B)).
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A 59.7 g piece of metal that had been submerged in boiling water was quickly transferred into 60.0 mL of water initially at 22.0 °C. The final temperature is 28.5 °C. Use these data to determine the specific heat of the metal. Use this result to identify the metal.
Answers
!!!!!!!’!!!!!!!!!!!!!!!!!!!!!!!’
A gas has a density of 1.57g/L at 40.0C and 2.00atm of pressure. What is the identity of the gas?
Answers
Answer:
Neon
Explanation:
K=C degrees+273.15 = 40.0+273.15=313.2 K
M=1.57g/L×0.08206 atm L/mol K×313.2 K/2.00 atm
M=20.17 g/mol
K= Kelvin
M= Molar Mass
The Chinese first began recording astronomical observations about 2,000 years ago.
True
False
Answers
suppose you have a sample of two pure substances: a solid piece of ice and a solid piece of copper metal. Which would be easier to break apart? Explain your reasoning
Answers
Answer:
Solid piece of ice.
Explanation:
Solid piece of ice can easily melt due to heat radiation
A graduated cylinder contains 50.0 ml of water. A 23.5 g piece of unknown metal is carefully dropped into the cylinder. When
the metal is completely covered with water, the water rises to the 53.4 ml mark. What is the density of the unknown piece of
metal in g/ml?
Answers
To find the density of the unknown piece of metal, we can use the formula:
Density = mass / volume.
How to find the density ?The volume of the metal can be calculated by deducting the starting water volume (50.0 ml) from the final water volume (53.4 ml) after the metal is introduced. We know the mass of the unknown metal is 23.5 g.Volume of metal = 53.4 ml - 50.0 ml = 3.4 ml.Now we can substitute the values into the density formula: Density = 23.5 g / 3.4 ml = 6.9 g/ml.Therefore, the density of the unknown piece of metal is 6.9 g/ml.To know more about density , check out :
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which is the formula of nitrogen (I) oxide?
Answers
Answer:
Oxides of nitrogen are a mixture of gases that are composed of nitrogen and oxygen. Two of the most toxicologically significant compounds are nitric oxide (NO) and nitrogen dioxide (NO2). Other gases belonging to this group are nitrogen monoxide (or nitrous oxide, N2O), and nitrogen pentoxide (NO5).
Explanation:
Write out and balance the chemical equation:
A solution of nickel (II) chloride reacts with a solution of potassium hydroxide
to produce solid nickel (II) hydroxide and a solution of potassium chloride.
Answers
Explanation:
NiCl2 + KOH = NiOH + KCl
since nickel is the primary element in nickel ii chloride, find the oxidation no of nickel in the compound and chlorine should have 2 as a subscription since the ii in the compound represents that nickel has an oxidation no of 2
fill in the blank. if dissociation of mgcl2 in water were 100%, the van`t hoff factor would be___; however, for real solutions the van`t hoff factor for mgcl2 is (greater than, less than) this value.
Answers
If dissociation of mgcl2 in water were 100%, the van`t hoff factor would be 3 (three); however, for real solutions the van`t hoff factor for mgcl2 is (greater than, less than) this value.
MgCl2 dissociates into three ions when it dissolves in water, giving it a theoretical van't Hoff factor of 3. The van't Hoff factor for MgCl2 is normally tested at a value of no more than 2.7.
The van't hoff factor for magnesium chloride is 3. The letter I stands for the Van't Hoff factor. One magnesium cation and two chloride ions make up the last three ions formed when magnesium chloride separates. Consequently, the magnesium chloride van't hoff factor is equal to 3.
A solute's impact on associated properties, such as osmotic pressure, relative vapor pressure reduction, boiling-point elevation, and freezing-point depression, is measured by the van 't Hoff factor i.
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At 34.0℃, the pressure inside a nitrogen-filled tennis ball with a volume of 148 cm^3 is 212 kPa. How many moles of N2 are in the tennis ball?
Answers
Answer:
0.012 mole
Explanation:
We'll begin by converting 34.0 ℃ to Kelvin temperature. This can be obtained as follow:
T(K) = T(℃) + 273
T(℃) = 34 ℃)
T(K) = 34 + 273
T(K) = 307 K
Next, we convert 148 cm³ to L. This can be obtained as follow:
1000 cm³ = 1 L
Therefore,
148 cm³ = 148 cm³ × 1 L / 1000 cm³
148 cm³ = 0.148 L
Finally, we shall determine the number of mole of the gas. This can be obtained as follow:
Temperature (T) = 307 K
Volume (V) = 0.148 L
Pressure (P) = 212 KPa
Gas constant = 8.314 KPa.L/Kmol
Number of mole (n) =?
PV = nRT
212 × 0.148 = n × 8.314 × 307
31.376 = n × 2552.398
Divide both side by 2552.398
n = 31.376 / 2552.398
n = 0.012 mole
Thus, the number of mole of the gas in the ball is 0.012 mole.
A balloon is inflated with 1.25 L of helium at a temperature of 298K. What is
the volume of the balloon when the temperature is 310K?
Answers
Answer:
What is
the volume of the balloon when the temperature is 310K?