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Questions and Answers
What is the molar mass (Mr) of iron?
What is the molar mass (Mr) of iron?
- 28 g/mol
- 12 g/mol
- 56 g/mol (correct)
- 6.02 x 10^23 g/mol
How many moles are there in 42 g of carbon?
How many moles are there in 42 g of carbon?
- 42 mol
- 12 mol
- 0.5 mol
- 3.5 mol (correct)
What is the Avogadro constant?
What is the Avogadro constant?
- 6.02 x 10^23 particles/mol (correct)
- 6.02 x 10^12 particles/mol
- 6.02 x 10^18 particles/mol
- 6.02 x 10^3 particles/mol
According to the balanced equation Mg + 2HCl -> MgCl2 + H2, how many moles of HCl react with 1 mol of Mg?
According to the balanced equation Mg + 2HCl -> MgCl2 + H2, how many moles of HCl react with 1 mol of Mg?
What is the relationship between the total moles of elements on the reactant and product sides of a balanced chemical equation?
What is the relationship between the total moles of elements on the reactant and product sides of a balanced chemical equation?
Which of the following equations correctly shows the relationship between moles, mass, and molar mass?
Which of the following equations correctly shows the relationship between moles, mass, and molar mass?
Which statement about the law of conservation of mass is true?
Which statement about the law of conservation of mass is true?
What is the relative formula mass (Mr) of a compound?
What is the relative formula mass (Mr) of a compound?
In a balanced chemical equation, what is true about the sum of the relative formula masses?
In a balanced chemical equation, what is true about the sum of the relative formula masses?
Why might a reaction appear to involve a change in mass?
Why might a reaction appear to involve a change in mass?
What is the unit used to measure chemical amounts?
What is the unit used to measure chemical amounts?
What is the relationship between the mass of one mole of a substance and its relative formula mass?
What is the relationship between the mass of one mole of a substance and its relative formula mass?
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