Chemical Calculations Notes 1

10 Questions | Total Attempts: 155

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Chemical Calculation Quizzes & Trivia

Chemical Calculations Notes 1 answers to examples. Note: 1. If your answer for number of atoms is (for example) 3. 00 x 1023, your answer has to be entered as 3. 00 x 10^23 ie. 3. 00(space)x(space)10^23 ^ represents exponent. 2. If your answer has units, please leave a space after your numerical answer then put in the unit. Eg. 0. 500 mol Key in your class, index number and name before the quiz in the following format: 3S201 Chen Ah Mao Your IP address is tracked.


Questions and Answers
  • 1. 
    Example 1B How many carbon atoms are present in 1.00mol of ethane, C2H6?
  • 2. 
    Example 1c How many moles of O2 is present in 4.00 x 1022 molecules of oxygen gas?
  • 3. 
    Example 1d How many moles of oxygen atoms are present in 2.00 x 1023 molecules of oxygen gas?
  • 4. 
    Example 3c How many oxygen atoms have the same mass as one bromine atom?
  • 5. 
    What is the relative molecular mass of dinitrogen pentoxide N2O5?
  • 6. 
    What is the relative molecular mass of oxygen? Remember the oxygen here we are talking about is oxygen gas O2.
  • 7. 
    Example 5b What is the relative formula mass of lithium oxide, Li2O?
  • 8. 
    Example 5c What is the relative formula mass of copper sulphate pentahydrate CuSO4.5H2O?
  • 9. 
    Example 6b What is the mass of 0.500mol of water?
  • 10. 
    Example 6c How many mole of oxygen is present in a bag filled with 64.0g of oxygen gas?
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