Artist as Chemist
Activity 5 Moles Review
NAME-___________________
Useful Information:
1 mole = 6.022 x 1023 atoms or molecules
1 mole = atomic weight/ molecular weight in grams.
1. How many atoms/molecules are in the following quantities:
a. 2.5 moles of H2O = ____________molecules of __________
b. 0.067 moles of CO2 = ____________ molecules of__________
c. 0.58 moles of MgCl2 = ____________ molecules of __________
d. 1.63 moles of Ne = ____________ atoms of _________
e. 4.56 moles of Pd = ____________atoms of __________
f. 6.33 moles of Al(OH)3 = ____________molecules of __________
2. What is the weight in grams of 1 mole of:
a.
b.
c.
d.
Al2(SO4)3 __________
H2S __________
I2 __________
Ca(OH)2 __________
3. How many molecules are there in 263 grams of CaCO3?
(Hint- change grams to moles & then moles to molecules)
4. How many molecules are there in 85.47 grams of Mg3(PO4)2 ?
5. How many grams are there in 1.5055 x 1023 atoms of gold?
(Hint- change atoms to moles & then moles to grams)
6. How many grams are there in 1.5055 x 1023 molecules of HCN?
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7. A sample of a compound contains 56.2g of silicon and 32.0g of oxygen. What
is the mole ratio (simplest formula) of silicon to oxygen in this compound?
(same as Chem to Go (5), p.220)
8. A sample of a compound contains 63.5g of copper, 32.1g of sulfur and 64.0g
of oxygen. What is the mole ratio (simplest formula) of copper to sulfur to
oxygen in this compound?
9. What is the molecular weight (molar mass) of the following
1.
2.
3.
4.
Na2SO4 ______________
CuSO4·5H2O ____________
O3 __________
Al(NO3)3 ______________
Bonus
1.25 moles C3H5(OH)3 =
__________________________ grams
__________________________ moles of molecules
__________________________ molecules
__________________________ carbon atoms
__________________________ oxygen atoms
__________________________ hydrogen atoms
1. Aspartame is an artificial sweetener that is 160 times sweeter than sucrose (table sugar)
when dissolved in water. It is marketed as Nutra-Sweet. The molecular formula for
aspartame is C14H18N2O5.
a) Calculate the molar mass of aspartame.
b) How many moles of molecules are present in 10.0g of aspartame?
c) Calculate the mass in grams of 1.56mol aspartame
d) What is the mass in grams of one molecule of aspartame?
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