CHEMISTRY HIGH SCHOOL

How many moles of H 2 will I need to make 5 moles of NH3?
12 SSO
How many moles of H 2 will I need to - 1

Answers

Answer 1
Answer:

Answer:

7.5 moles of hydrogen is required

Explanation:

Given data:

Number of moles of H₂ needed = ?

Number of moles of NH₃ = 5 mol

Solution:

Chemical equation:

N₂ + 3H₂     →     2NH₃

Now we will compare the moles of ammonia and hydrogen.

         NH₃       :         H₂  

          2           :          3

          5           :         3/2×5 = 7.5 mol

Thus, 7.5 moles of hydrogen is required.

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Answer:

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After being thoroughly stirred at 10.°C, which mixture is heterogenous?(1) 25.0 g of KCl and 100. g of H2O(2) 25.0 g of KNO3 and 100. g of H2O
(3) 25.0 g of NaCl and 100. g of H2O
(4) 25.0 g of NaNO3 and 100. g of H2O

Answers

The answer is (2) KNO3. This depends on the solubility of these four compounds at 10℃. For NaCl, it is 35.8 g, For NaNO3, 80.8 g. KCl, 31.2 g. KNO3, 21.9g. So only KNO3 is less than 25.0 g.

Answer:

2

Explanation:

Because if look at the Solubity curves you will notice other three doesn't go 25 grams. They start above the 25 grams.

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How many milliliters of 0.183 m hcl would be required to titrate 5.93 g koh?

Answers

  Molar mass:
KOH = 56.0 g/mol

Number of moles of KOH :

5.93  / 36.5 => 0.1624 moles

KOH + HCl = KCl + H₂O 

1 mole KOH --------------> 1 mole  HCl
0.1624 moles KOH ----> ?

moles HCl = 0.1624 x 1 / 1

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V(HCl) = 0.1624 / 0.183

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hope this helps!
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