2Na + Cl2 ---> 2NaCl
If 4 mols of Cl2 react, how many mols of NaCl will be formed?
8 mols
100
If the temperature of a gas doubles and the volume remains the same, what happens to the pressure?
It doubles
100
If a reaction is exothermic, is delta H positive or negative?
Negative
100
In a solution of sugar water, what is the solute?
Sugar
100
If something tastes bitter and feels slippery, is it likely an acid or a base?
A base
200
How many grams of mercury(Hg) are in 15 mols of mercury?
3009 grams
200
A 40 liter balloon at 1.2 atm of pressure is squeezed until its volume is reduced to 30 liters. What is the new pressure inside the balloon?
1.6 atm
200
Explain the concept of specific heat
specific heat measures how much heat energy it takes to change the temperature of something... etc.
200
What is the molarity of 3L solution containing 140 grams of KBr?
0.39 M
300
How many molecules of CO are in 6.37g of CO?
1.37 x 10^23 molecules
300
1,450 mL of helium gas is held at 280 K and 830mmHg. How many mols of gas are present?
(1.45)(1.09atm)= n(0.0821)(280)
0.069 mols
300
How much heat energy will it take to raise the temperature of a 19g piece of metal with a specific heat of 0.8 from 20C to 130C?
1368 kJ
300
A 4M solution is diluted to 600mL. The new molarity is 0.6M. What was the original volume of the solution?
90 mL
400
C2H6O2 + 3O2 ---> 2CO2 + 3H2O
If 7 grams of O2 are consumed, how many grams of CO2 are formed?
6.41 grams
400
Mg + 2HCl ---> MgCl2 + H2(g)
If 12 liters of H2 gas are formed at STP, how many mols of HCl were reacted?
1.07 mols
400
A 42g piece of metal with a heat capacity of 0.22 is heated to 100 C then dropped into water at 24C. The final temperature of the water is 28C. How many grams of water were present? (Specific heat of water is 4.184)
39.75g
400
I have a 15% solution of NaCl containing 9 mols of NaCl. How many grams of solution are there?
525.96g/S= .15
3506.4grams
500
C2H6O + 3O2 ---> 2CO2 + 3H2O
If I burn 100 grams of C2H6O with 100 grams of O2, how many grams of H2O will be formed?
56.31 grams
500
Mg + 2HCl ---> MgCl2 + H2(g)
If 18 grams of Mg are reacted at 1.6 atm and 290K, how many liters of H2 will be formed?