Quiz | Chemical Calculations

1

What is the mass of 1 mole of benzaldehyde (C6H5CHO)?

1 g

106 g

6.022 x 1023 g

Same as 1 mole of benzene (C6H6)

2

What is the mass of carbon present in 110 g of dioxide?

30 g

36.7 g

47.1 g

110 g

3

How many moles does a balloon filled with 10 g of hydrogen have?

10 moles of H2

9.90 moles of H2

4.95 moles of H2

20.2 moles of H2

4

How many of carbon atoms do you have in 0.4 mole of C2H4?

1.35 x 1025 atoms

2.41 x 1023 atoms

1.72 x 1022 atoms

4.82 x 1023 atoms

5

What is the limiting reagent in a chemical reaction?

The reagent which is consumed completely

The reagent which has the smallest molar mass

The reagent which has the smallest coefficient

All of the above

6

How many grams of NH3 can be prepared from 5 g of N2 and 5 g of H2?

3.04 g of NH3

6.08 g of NH3

14.05 g of NH3

28.10 g of NH3

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