Other Chemistry Answers

The number of particles that would typically “collide” in an elementary step are: 

1. 5 - 6
2. unlimited
3. 1 - 2
4. none
5. 3 - 4

What are the units of the rate constant, k, for a 1st order reaction if the rate has the units mol*L⁻¹*s⁻¹ and all concentrations are in mol*L⁻¹? (note that the symbol * represents multiplication) 

1. L²*mol⁻²s⁻¹
2. L*mol⁻¹*s⁻¹
3. mol²*L⁻²s⁻¹
4. s⁻¹

If the rate law for a hypothetical reaction is r = k[NaOH]²[H₂]¹[SO₃]⁰, what is the overall order of reaction?

1. second
2. zero
3. third
4. first
5. fourth

A solid piece of limestone (CaCO₃) is reacted with 1.0 mol/L sulfuric acid at 25°C. To decrease the number of effective collisions (rate), you could: *

1 point

1. Use sulfuric acid with a concentration of 0.5 mol/L
2. Add a catalyst
3. Increase the temperature to 27°C
4. All of the above
5. Use powdered calcium carbonate

1.) If 202.5 g of mercury has a volume of 15cm³, what is the density of mercury?

2.)If the density of silver is 10.5g/cm³, what would be the mass of a silver whose volume is 9cm³?

25.00 mL of 6.00 M H2SO4 solution is diluted with water to a volume of 2.000L. What is the [H+] and [OH-] of the resulting solution?

A calorimeter that contains 3.6 L of water is used to measure the enthalpy of solution for 45 g of KOH. Calculate the molar enthalpy of solution that is associated with the reaction if the temperature of the water changes from 25.5 °C to 20.7 °C. [The molar mass of KOH is 56.10 g/mol]  *

If two or more compounds are composed of the same two elements then the ratio of the masses of the second element that is combined with a certain mass of the first element is always a ratio of small while numbers. This statement is called the law of what