Question

Helppppp

What is the mass of 4.09 x 10^22 molecules of oxygen gas?


1.09 grams
7.69 x 1044 grams
2.17 grams
0.0679 gram

Answer 1

`2.17gO_2`

Step-by-step explanation:

Hello there!

In this case, according to the given information, it turns out possible for us to calculate the mass of 4.09 x 10^22 molecules of oxygen gas by firstly keeping in mind that that 1 mole of it has a mass of 32.0 g and secondly that 1 mole of any substance contains 6.022x10^23 representative units, in this case, molecules of O2, and thus, the appropriate setup to perform this conversion is shown below:

`4.09x10^(22)molecules \ O_2*(1molO_2)/(6.022x10^(23)molecules \ O_2)*(32.0gO_2)/(1molO_2) \\\\2.17gO_2`

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