Chemistry Answers

consider a mixture of two gases A and B, confined to a closed vessel. A quantity of a third gas, C, is added to the same vessel at the same temperature. How does the addition of gas C affect the following: A. the partial pressure of gas A, B. the total pressure in the vessel?

How many moles of nitrogen are in 72.0 g of nitrous oxide n20

1 What mass of carbon monoxide gas is contained in a 15 L balloon at a pressure of 1325 mm Hg and a temperature of 36 C?

If 8.50-g of sodium hydroxide is dissolved to make 500-mL of cleaning solution,

calculate the pOH of the solution.

2. Plot these data as electromagnetic waves on a graph and find the following:

a. Period

b. Frequency

2.1 Time= 15s

Cycles= 5

2.2 Time= 30s

Cycles= 6s

3. The wavelength of an electromagnetic wave is 450nm, and the speed of light (c) is 3x108m/s. Determine the frequency, energy, and numbers of the electron.

1. Plot these data as electromagnetic waves on a graph and find the following:

a. Wavelength

b. Amplitude

1.1 Highest position (y)= 12m

Lowest position (y)= -4m

Cycles= 6

Distance (x) = 32m

1.2 Highest position (y)= 15m

Lowest position (y)= -3m

Cycles= 4

Distance (x) = 25m

What happens during the electrolysis of sodium chloride?

a)the mass of the anode decreases by time

b) sodium ions are oxidized at the anode

c) chloride ions are reduced at the cathode

d)the mass of the cathode increases by time

write a balance chemical equation of the reaction