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sdas [7]
3 years ago
15

How many atoms are in a sample of 72.8 g calcium (Ca)?

Chemistry
2 answers:
Aneli [31]3 years ago
8 0
Atomic mass Ca=40.078 a.m.u

40.078 g--------------------6.02x10²³  atoms
72.8 g ---------------------- ??

72.8 x (6.02x10²³ ) / 40.078 =

4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms


HOPE THIS HELPED :D
xxMikexx [17]3 years ago
5 0
Atomic mass Ca = 40.078 a.m.u

40.078 g -------------------- 6.02x10²³ atoms
72.8 g ---------------------- ??

72.8 x ( 6.02x10²³) / 40.078 =

4.38x10²⁵ / 40.078 = 1.093x10²⁴ atoms

hope this helps!
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As per the Dalton's law of partial pressure, in a mixture, pressure exerted by each gas when summed gives the total partial pressure exerted by mixture.

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OlgaM077 [116]

Answer:

have the same number of atoms of each element in the reactants and in the products

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<em>The basic principle in balancing a chemical equation would simply be to have the same number of atoms of each element in the reactants and in the products.</em>

<u>A balanced chemical equation is one that has the same number of atoms of each element on the reactant and the product's side of the equation.</u> For example, consider the equation below:

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5 0
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Margarita [4]

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I believe the answer would be A. equal temperature

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