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irinina [24]
3 years ago
13

PLEASE HELP ITS VERY EASY FOR OTHER PLEASE ITS A TEST DUE IN AN HOUR PLEASEEEEEEEEEE

Chemistry
2 answers:
STatiana [176]3 years ago
5 0

Answer:

I think it is three times I'm not sure

AveGali [126]3 years ago
3 0

Answer:

once

Explanation:

You can tell each time there is a horizontal line. There is only one horizontal line that shows the object stayed 10 meters away for about 20 seconds.

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How many grams of copper Cu, 63.54 g/mol are in 3.42 moles copper
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Answer:
              Mass  =  217.30 g

Solution:

Mass and moles are related to each other as,

                                  Moles  =  Mass / M.mass  ---- (1)

Where;
            Moles  =  3.42

            M.Mass  =  63.54 g.mol⁻¹

Solving eq. 1 for Mass,

                                  Mass  =  Moles × M.mass
Putting Values,
                                  Mass  =  3.42 mol × 63.54 g.mol⁻¹

                                  Mass  =  217.30 g
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