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Anika [276]
2 years ago
9

Find the mass of 0.456 mol of Ca(OH)2 Please if you can show the work.

Chemistry
2 answers:
Tatiana [17]2 years ago
6 0
<h2>Answer:</h2>

<em>Hey, </em>

<h3><u>QUESTION)</u></h3>

A) Let's first calculate the molar mass M of the molecule :

<em>M(Ca(OH)₂) = M(Ca) + 2M(O) + 2M(H) </em>

  • M(Ca(OH)₂) = 40 + 2 x 16 + 2 x 1
  • M(Ca(OH)₂) = 74 g/mol

B) Let's deduct the corresponding mass m :

<em>m = M x n </em>

  • m = 74 x 0.456
  • m = 33.744 g
  • m ≈ 34,0 g

The mass of calcium hydroxide corresponding to this quantity of substance (in mol) is therefore 34 g.

m_a_m_a [10]2 years ago
3 0

Answer:

Ca(OH)2 molecular weight. Molar mass of Ca(OH)2 = 74.09268 g/mol. This compound is also known as Calcium Hydroxide. Convert grams Ca(OH)2 to moles or moles Ca(OH)2 to grams. Molecular weight calculation: 40.078 + (15.9994 + 1.00794)*2 ››

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3 years ago
How many atoms are found in 4.75 moles of Fe?
aliya0001 [1]

Answer:

The answer to your question is below

Explanation:

a)

Number of atoms = ?

moles of Fe = 4.75

-Use proportions to solve this problem

                            1 mol of Fe --------------------- 6.023 x 10²³ atoms

                          4.75 moles  ---------------------  x

                            x = (4.75 x 6.023 x 10²³) / 1

                            x = 2.86 x 10²⁴ / 1

  Number of atoms = 2.86 x 10²⁴

b)

Number of moles = ?

moles of 1.058 moles of H₂O

I think this question is incorrect, maybe you wish to know the number of atoms or grams of H₂O.

c)

Number of atoms = ?

moles of Fe = 0.759

                       1 mol of Fe ------------------ 6.023 x 10²³ atoms

                       0.759 moles ---------------  x

                        x = (0.759 x 6.023 x 10²³) / 1

                        x = 4.57 x 10²³ / 1

Number of atoms of Fe = 4.57 x 10²³ atoms

d)

Number of molecules = ?

moles of H₂O = 3.5 moles

                          1 mol of H₂O ------------------ 6.023 x 10²³ molecules

                         3.5 moles       ------------------   x

                          x = (3.5 x 6.023 x 10²³) / 1

                          x = 2.11 x 10²⁴ molecules

Number of molecules = 2.11 x 10²⁴                                                                        

7 0
3 years ago
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