Question

Question 1 (2 points)
Avogadro's number is the number of particles in one mole of a pure substance.

True
False
Question 2 (4 points)
If 1 mole of H2SO4 has a mass of 98.08 g, what is the mass of 2H2SO4 in grams?

a
98.08 g x 3
b
98.08 g x 2
c
86.79 g x 2
d
88.22 g x 2
Question 3 (4 points)
How many moles of silver (Ag) are in 539.35 g _



a
5
b
3.5
c
5.3
d
3.5
Question 4 (4 points)
Which of the following is TRUE about molar mass? Multi select

a
If you change a subscript in a chemical formula, you don't change the molar mass
b
A substance’s molar mass is calculated by multiplying the atomic mass of each element by the moles present in 1 mole of the chemical formula
c
Units for molar mass is grams (g)
d
The molar mass of a compound does not change when you have different gram amounts of the same compound.
Question 5 (4 points)
How many grams of copper (Cu) are in 1.5 mol of Cu?



a
95.32
b
190. 20
c
95.04
d
190.60
Question 6 (10 points)


1. What is the molar mass of C3H8? g/mol

2. How many moles of C3H8 do you get in 196.0 g? mol (round to 2nd decimal place)



Carbon (C):
734dc238-143c-40f9-913d-2d30d489053812.0
33043da4-8a06-4420-a1b6-13ddc06a25ae g/mol

Hydrogen (H):
329fd85b-89b3-4999-a253-4b15abf354801.0
6a2457c7-4151-4fac-91cf-e87079d78af3 g/mol


C = 12.001

H = 1.002

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Blank 2:

Answer 1

Question 1: True

Question 2: b (98.08 g × 2 = 196.16 g)

Question 3: a (539.35 g ÷ 107.868 g/mol ≈ 5.00 mol)

Question 4 (multi-select): b and d

Question 5: a (1.5 mol × 63.546 g/mol = 95.32 g)

Question 6:
1. Molar mass C3H8 = 3(12.001) + 8(1.002) = 44.019 g/mol (≈ 44.02 g/mol)
2. Moles = 196.0 g ÷ 44.019 g/mol = 4.45 mol (rounded to 2 decimal places)