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# Activity 3.2

Choose the correct option to answers each question. All questions carry equal marks. Click on the finish button when you you are done and call thee teacher to check your grade before you log out. Thank you!

1. The mass of one mole of a substance is equak to its molecular weight
TRUE, FALSE, ,
2. What is the SI base unit used to measure the amount of a substance?
Kelvin, meter printable , kilogram, mole,
3. What is the mass of 2.25 moles of sulfuric acid (H2SO4)?
0.60 x 10^23 molecules, 2.4 x 10^–23 moleculea, 2.4 x 10^24 molecules, 2.4 x 10^23 molecules,
4. Calculate the number of atoms in 13.2 mol copper.
CO, H2O2, CO2, H2O,
5. One mole of silicon (Si) has a mass of 28.086 g, and one mole of carbon has a mass of 12.011 g. What is the mass of one mole of silicon carbide (SiC)?
9.30 x 10^1 g, 0.112 x 10^1 g, 0.169 x 10^1 g, 9.30 x 10^–1 g,
6. In the reaction shown below, 2.00 x 10^3 g CaCO3 produce 1.05 x 10^3 g of CaO, what is the percent yield?
50.0 g, 98.0 g , 112 g , 220 g,
7. Copper is one of a group of metals called the coinage metals. How many atoms of copper (Cu) are in a pure copper coin weighing 12.0 g?
0.0313 x 10^23 atoms , 1.10 x 10^23 atoms, 0.187 x 10^23 atoms , 1.13 x 10^23 atoms,
8. Calculate the number of molecules in 4.0 mol H2O.
2.340 g, 40.097 g, 16.075 g, 3.3734 x 10^2 g,
9. One mole of any substance is equals to 6.02 X 10^23
2.19 x 10^23 atoms , 27.95 x 10^–23 atoms, 7.95 x 10^24 atoms educational games , 79.5 x 10^23 atoms,
10. What is the mass in grams of 1.02 x 10^24 atoms manganese (Mn)
90.2%25, 87.9%25, 93.8%25, No enough information to calculate this,