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MDCAT
Chemistry
2014

Chemistry · Stoichiometry

Work through this past-paper style MCQ, then read the full explanation. Practice more chemistry questions on mMCQ with adaptive practice and topic analytics.

Question

The number of molecules in 9 g of ice (H2O) is 

Options
  • A

    6.02 x 1024

  • B

    6.02 x 1023

  • C

    3.01 x 1024 

  • D

    3.01 x 1023

Explanation

Water has a mass of 18g (16+2). So, 9g of ice(H2O) means 0.5 mol. 1 mol has a 6.02x1023 number of molecules, so 0.5 mol will have a 3.01x1023 number of molecules.

As it is numerical, it can have only one possible answer.

Water has a mass of 18g (16+2). So, 9g of ice(H2O) means 0.5 mol. 1 mol has a 6.02x10^23 number of molecules, so 0.5 mol will have a 3.01 x 1023 number of molecules.

As it is numerical, it can have only one possible answer.

Water has a mass of 18g (16+2). So, 9g of ice(H2O) means 0.5 mol. 1 mol has a 6.02x10^23 number of molecules, so 0.5 mol will have a 3.01 x 1023 number of molecules.

As it is numerical, it can have only one possible answer.

Water has a mass of 18g (16+2). So, 9g of ice(H2O) means 0.5 mol. 1 mol has a 6.02x10^23 number of molecules, so 0.5 mol will have a 3.01 x 1023 number of molecules.

As it is numerical, it can have only one possible answer.

Water has a mass of 18g (16+2). So, 9g of ice(H2O) means 0.5 mol. 1 mol has a 6.02x10^23 number of molecules, so 0.5 mol will have a 3.01 x 1023 number of molecules.

As it is numerical, it can have only one possible answer.

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Tagged under Chemistry · Stoichiometry · 2014