Chemistry Unit 3 Study
What is the new concentration? 0.35M CaCl2 10mL diluted to 100.0mL
0.035M
Put the following gases in order of increasing speed Ar Kr He
Kr<Ar<He
What is the new w/v%? 20.0mL of a solution is 4.00%w/v add H2O until solution is 100.0mL
0.800%w/v
What is the w/w% of a solution after 90.0g H2O get added to 10.0g NaOH?
10.0%w/w NaOH(aq)
What is the volume of 10.0g hydrogen gas at STP?
111L
How many grams of glucose(C6H12O6) are in 500.0mL of 0.2M glucose solution?
18g glucose
A gas sample at 4atm and 0.5L is allowed to expand to 2L. What is the pressure?
1atm
Convert 0.58atm to mmHg
440.8mmHg
What is the combustion reaction for methan?
Ch4 + 2O2 ---> CO2 + 2H2O
How many liters of alcohol would be present in the Natatorium Pool if the main pool holds 1 million gallons of H2O?
0.0587L alcohol
If 100mL of 1.0M CaCl2 and 300mL of water are combined, what is the appropriate chloride ion concentration in the resulting solution?
0.2mol Cl-
What is the partial pressure of each gas? Ptot= 1.2atm 2mol He 1mol Ar 3mol Kr
0.4atm He 0.2atm Ar 0.6atm Kr
How much KCl is ingested if you drink this solution? 30.0mL 1.7%w/v KCl(aq)
0.51g KCl
If you evaporate the water from 25.0mL of 5.00%w/v LiNO3(aq), how much residue will remain in the container?
1.25g LiNO3
How many parts of 32mg NaF for every million 20kg solutions?
1.6ppm
How much heat is released in the following reaction? 3H2 + N2 ---> 2NH3 deltaH= -22kcal
13.2kcal
What volume of chlorine trifluoride gas can be produced from reaction of 3L of chlorine gas and 3L of fluorine gas in a combination reaction?
2.0L ClF3
1.0 mol He at 273K and P of 1atm. What is the volume of this gas sample?
22.4L
How much heat is needed to vaporize 3.00mol of H2O at its boiling point(100C)?
29.2kcal
A 2.2L gas sample at 150K is warmed at 300K. What is the new volume?
4.4L
What is the pressure on a gas at 220K if it had a pressure of 2.4atm at 120K?
4.4atm
How do I make 500.0mL of a solution that is 10.0%w/v sugar?
50.0g sugar
A gas mixture contains 20.0g He gas and 6.0g hydrogen gas at a total pressure of 800torr. What is the partial pressure of He in this mixture?
500.0torr
How many grams of KBr are needed to prepare 300mL of a solution that is 2.0%w/v?
6.0gKBr
How much heat is released in burning 48.0g of methane with a product of 211kcal of heat?
633.0kcal
How much heat is required to produce 20.0g of sulfur dioxide according to the following chemical reaction? 47kcal + 2SO3(g) ---> 2SO2(g) + O2(g)
7.3kcal
10.0g of a gas occupies 3.47L at 1.0atm and 300.K. What is the molar mass of this gas?
71g/mol
Which compound is likely most soluble in water? CH3CH2CH2CH2CH2CH2OH CH3CH2CH2CH2CH2CH3 CH3CH2OH BaSO4
CH3CH2OH
Which of the following is capable of hydrogen-bonding interactions? H2 HB3 CH3OH HCN
CH3OH
Which of the following is capable of London Dispersion and Dipole-Dipole interactions, but can't do hydrogen-bonding interactions? BCl3 CH3CH2OH CF4 CH3CN CH3COOH
Ch3CN
Which compound is an electrolyte? CH3CH2CH2CH2CH2Br CH3CH2OH PbBr2 KOH
KOH
