WorksheetsChem C ECA Review
Total questions: 20
Worksheet time: 2hrs 40mins
You have a gas that has a pressure of 2 atm and a volume of 10 L. What is the new volume if the pressure is changed to 1 atm?
5 L
20 L
It would stay at 10L
1 L
If a gas is measured to have a volume of 0.5atm at 273K, what would happen to the pressure if the temp increased to 300K?
increase
decrease
remain the same
What is the volume of 1 mole of any gas at STP?
2.24 L
8.314 L
22.4L
It depends on the gas
When trying to find the quantity of gas in a sample, you take a pressure measurement in units of atmospheres. What value of R should you use to complete the calculation?
62.4
8.314
.0821
22.4
How many moles of nitrogen gas are there in 135 L of nitrogen at STP?
6.03 mol N2
.0446 mol N2
22.4 mol N2
3020 mol N2
If 4.00 moles of a gas are at a pressure of 5.60 atm and a volume of 12.0 liters, what is the temperature?
205 K
.00489 K
22.7 K
2.02 K
If I have 16.5 moles of gas at a temperature of 67 °C and a volume of 88.89 liters, what is the pressure of the gas?
1.02 atm
5.18 atm
525 atm
104 atm
The substance being dissolved is called the ________
solvent
solid
solute
solvate
How many mols of HCl are in 3.0 L of 2.0M HCl solution?
2.0 mol
1.5 mol
6.0 mol
0.66 mol
You are given a small beaker of solution at room temp. You add a bit of solute to the solution and it dissolves. The solution was:
saturated
unsaturated
concentrated
warm
What is the molarity of a 0.50 L of a solution that contains 60.0g of sodium hydroxide (NaOH)
0.8 M
1.5M
3.0M
6.0M
Calculate the grams of NaOH present in 10.0 mL of a 2.0 M NaOH solution.
0.80 grams
2000 grams
0.30grams
5 grams
A solution is made by dissolving 0.500mole of NaCl in enough water to give a final volume of 400.0 mL. What is the molarity of the solution?
0.10 M
0.40 M
1.25 M
2.33 M
How many millilitres of 10.0 M NaOH is needed to make 300.0 ml of a 2.00 M solution?
0.067 mL
60.0 mL
100 mL
125 mL
Calculate the volume of a 5M solution that contains 10 moles of NaOH
0.5 L
1 L
2 L
4 L
The best piece of glassware to use when preparing a solution is a __________________.
test tube
beaker
volumetric flask
erlenmeyer flask
In the lab, the ______________ of solute must be measured on the balance scale in order to prepare a solution with a specific molarity.
grams
volume
liters
molecules
