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dolphi86 [110]
3 years ago
13

How many atoms are in 165 g of calcium?

Chemistry
2 answers:
vesna_86 [32]3 years ago
7 0

             <span> Find the molar mass of calcium acetate...158.165g.
So start with 255g Calcium acetate x 1 mole Calcium Acetate/158.165 g Calcium Acetate x 6 mol Hydrogen/1 mole Calcium Acetate x 6.022e23 atoms/mole.

So...(255 x 1 x 6 x 6.022e23)/(158.165 x 1 x 1) = 5.825e24 hydrogen atoms</span>

<span />

Romashka [77]3 years ago
5 0
Moles in165g = 165 / 40 = <span><span>N/<span>6.02×10^23</span></span></span>
<span>N=2.48325×<span>10^24
hope it helps<span /></span></span>



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Answer:

H₂SO₄

Explanation:

Given data:

Number of moles of H₂SO₄ = 15 mol

Number of moles of Fe = 13 mol

Which reactant is limiting reactant = ?

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3H₂SO₄  + 2Fe      →          Fe₂(SO₄)₃  + 3H₂

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               H₂SO₄         :          Fe₂(SO₄)₃  

                  3               :              1

                 15               :              1/3×15 = 5

                H₂SO₄         :            H₂

                  3               :              3

                 15               :              15

                Fe               :          Fe₂(SO₄)₃  

                  2               :              1

                 13               :              1/2×13 = 6.5

                Fe               :                H₂

                  2               :                 3

                 13               :              3/2×13 = 19.5

Number of moles of product formed by  H₂SO₄ are less thus it will act as limiting reactant.

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