2. Atoms & Elements

Calculating Molar Mass

객관식
What is the molar mass of HCl (hydrochloric acid)?
177
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객관식
Which of the following best describes the mass of 1 mol of atoms for an element?
120
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객관식
What is the mass (in grams) of 7.98 moles of krypton (Kr)?
130
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객관식
What is the molar mass of Al_2(SO_4)_3?
110
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객관식
What is the molar mass of propane (C3H8)?
168
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객관식
A condensation reaction involving 200 glucose molecules, C6H12O6, results in a polysaccharide. What is the molar mass, in g/mol, of the polysaccharide, assuming complete reaction and loss of water molecules?
748
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객관식
What is the molar mass of NaOH?
214
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객관식
A 0.399 g sample of an unknown gas fills a 550. mL flask at standard temperature and pressure (STP). What is the molar mass of the gas?
129
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미해결 질문
What is the molar mass of Mg₃(PO₄)₂, a substance formerly used in medicine as an antacid?
772
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객관식
Approximately how many grams of Fe2O3 are present in 0.82 mol Fe2O3?
109
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객관식
What is the molar mass of chloroform (CHCl₃) given that a sample weighing 0.389 g is collected in a flask with a volume of 102 cm³ at 97°C and a pressure of 728 mmHg?
777
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객관식
Which of the following is the molar mass of carbon (C)?
188
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객관식
A 1.0 mol sample of which of the following compounds has the greatest mass?
102
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객관식
How many bromine (Br) atoms are present in 2.50 g of elemental bromine?
144
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객관식
How many different elements are present in the chemical formula C6H12O6?
128
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