Answer:
<em>Q1) How many molecules are present in the following quantities?</em>
a) 1.5055 x 10²³ molecules.
b) 2.7099 x 10²¹ molecules.
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<em>Q2) How many moles are present in the following quantities?</em>
a) 1.66 x 10⁻⁴ mol.
b) 1.66 x 10⁻¹⁵ mol.
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<em>Q3) What is the molar mass of each of the following substances?</em>
a) 18.0 g/mol.
b) 40.0 g/mol.
c) 53.45 g/mol.
d) 98.0 g/mol.
e) 234 g/mol.
f) 239.2 g/mol.
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<em>Q4) Convert the following to moles.</em>
a) 1.5 mol.
b) 0.058 mol.
c) 0.051 mol.
d) 0.042 mol.
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<em>Q5) Convert the following to grams.</em>
a) 4.40 g.
b) 48.045 g.
c) 17.48 g.
d) 54.0 g.
<em>Q6) How many molecules are present in the following masses?</em>
a) 5.68 x 10²1 molecules.
b) 3.345 x 10²5 molecules.
<em>Q7) Convert the following to grams.</em>
a) 0.664 g.
b) 169.83 g.
c) 5.712 g.
<em>Explanation:</em>
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