Rebuild the formula hunt

Exercise and reference answers

Missing parts

1. Answer

   2.272

   Choices

   1. 3.421
   2. 2.272

2. Answer

   4.544

   Choices

   1. 4.544
   2. 6.055

3. Answer

   2

   Choices

   1. 2
   2. 3

4. Answer

   CO2

   Choices

   1. CO2
   2. CO
   3. C2O

Complete the statement

A 100 g gas sample holds 27.29 g C and 72.71 g O. Carbon: 27.29/12.01 = {0} mol. Oxygen: 72.71/16.00 = {1} mol. Ratio 1 : {2}, so the formula is {3}.

Instructions

Tap the right value for each blank in the worked example.

Explanation