Question

1. What is the final concentration when 475 mL of 6.0 M HCl solution is diluted to a final volume of 1.45 L?

2. A gas has a volume of 675 mL at 308 K and 646 mmHg pressure. What is the volume (L) of the gas at −95°C and a pressure of 1.06 atm (n is constant)?

3. Find out the number of molecules present in 2.54g of copper (I) chloride.

4. Determine the limiting reactant for the following reaction. And, find out grams of CO2 formed from 59.4 grams of O2 and 80.4 grams of CH4? CH4(g) + 2O2(g) à CO2(g) + 2H2O(g)

5. Find out the percent yield for the following reaction if 6.53 g of CH4 produced 7.89g of CO2. CH4 + 2O2 à CO2 + 2H2O

Answer #1

1. Hydrogen produced in the following reaction is collected over
water at 23oC and 742 Torr:
2Al + 6HCl --> 2AlCl3 +
3H2
What volume (mL) of the gas will be collected in the reaction of
1.50 g Al with excess HCl?
2. Sample of O2 gas has a volume of 50.0 L at a pressure of 750.
mmHg. What is the final volume, in liters, of the gas at 2.0
atm?
3. What is the mass, in grams, of...

1. Hydrogen produced in the following reaction is collected over
water at 23oC and 742 Torr: 2Al + 6HCl --> 2AlCl3 + 3H2 What
volume (mL) of the gas will be collected in the reaction of 1.50 g
Al with excess HCl?
2. Sample of O2 gas has a volume of 50.0 L at a pressure of 750.
mmHg. What is the final volume, in liters, of the gas at 2.0
atm?
3. What is the mass, in grams, of...

A weather balloon contains 222 L of He gas at 20. °C and 760.
mmHg. What is the volume of the balloon when it ascends to an
altitude where the temperature is -40. °C and 540. mmHg?
1
What volume does 12.5 g of Ar gas at a pressure of 1.05 atm and
a temperature of 322 K occupy? Would the volume be different if the
sample were 12.5 g of He gas under the same conditions?
How many moles...

1 in = 2.5 cm. 1 atm = 760 torr density of mercy = 13.6 g/mL at
25 oC gravity = 9.8 m/s2
R = 0.082 L.atm/mol.K PV =
nRT
Force = mass x acceleration
Pressure = Force/area
Today’s atmospheric pressure is 32.0” of mercury. What is the
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The burette used in the lab has a cross-section area of 1
cm2 so that a height of 1 cm provides a volume of 1
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1) Describe an example of each of the following that may be
found of your kitchen: Explain how your choice falls into this
category, and if there is a chemical name or symbol for it, provide
that as well. Provide a photo of your example with your ID card in
it. a) a compound b) a heterogeneous mixture c) an element (symbol)
Moving to the Caves… Lechuguilla Caves specifically. Check out this
picture of crystals of gypsum left behind in...

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