CHEMISTRY

If 1021 molecules are removed from 200 mg of CO2 then the number of moles of CO2 left is

2.88 x 10-3
1.66 x 10-3
4.54 x 10-3
1.66 x 10-2

Your Answer
Not Attempted

Correct Answer
a
please show me the calculation.

1 Answers

156

Rajiv Agarwal ·2014-03-13 04:19:02

44 gm of CO₂ contains 6.023 x 10²³ molecules
200 mg of CO₂ contains = (200x10^-3/44) x 6.023 x 10²³ molecules

Now, from this number, subtract 10²¹

This should give you the answer.

Solve and let us know :)

UP 0 DOWN 2
Rohit Ghosh BUT IN THE QUESTION IT IS SAID TO 1021 MOLECULES N0T 10 TO THE POWER 21.
Upvote·0· Reply ·2014-03-14 22:40:22
Rohit Ghosh ANYWAY THANK YOU FOR THE CALCULATION
Upvote·0· Reply ·2014-03-14 22:41:09
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