Question

A closed container has 4.02 ⋅ 1023 atoms of a gas. Each atom of the gas weighs 1.67 ⋅ 10–24 grams. Which of the following shows and explains the approximate total mass, in grams, of all the atoms of the gas in the container?
6.71 grams, because (4.02 ⋅ 1.67) ⋅ (1023 ⋅ 10–24) = 6.7134
5.69 grams, because (4.02 + 1.67) ⋅ (1023 ⋅ 10–24) = 5.69
0.67 grams, because (4.02 • 1.67) ⋅ (1023 ⋅ 10–24) = 6.7134 • 10–1
0.57 grams, because (4.02 + 1.67) ⋅ (1023 ⋅ 10–24) = 5.69 ⋅ 10–1

Answer 1

@Michele_Laino

Answer 2

@jim_thompson5910

Answer 3

we have to compute this:
\[\Large \left( {4.02 \cdot {{10}^{23}}} \right) \cdot \left( {1.67 \cdot {{10}^{ - 24}}} \right) = ...?\]

Answer 4

am i adding

Answer 5

@Michele_Laino

Answer 6

Its D

Answer 7

because you have to 4.02 + 1.67

Answer 8

@Michele_Laino

Answer 9

you have to multiply, here are your steps:
\[\large \left( {4.02 \cdot {{10}^{23}}} \right) \cdot \left( {1.67 \cdot {{10}^{ - 24}}} \right)= \left( {4.02 \cdot 1.67} \right) \cdot {10^{23 - 24}} = ...?\]

Answer 10

omg

Answer 11

do i have to do this

Answer 12

yes!

Answer 13

Its actually C

Answer 14

you have tp multiply 4.02 * 1.67

Answer 15

yes!

Answer 16

6 actually

Answer 17

4.02*1.67=6.7134

Answer 18

6.7134 * 10-1

Answer 19

that's right!

Answer 20

which can be rounded off to 0.67 grams