Chemical Calculations Notes 1
10 Questions
| Attempts: 242
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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