Protons + Neutrons = the atomic ?
1 answer:
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Answer:
1.61 x 10²⁰ molecules
Explanation:
Given parameters:
Mass of the hydrogen gas = 8.01 x 10⁻⁴g
Unknown
Number of molecules of NH₃ = ?
Solution:
Given reaction:
N₂ + 3H₂ → 2NH₃
We have to solve from the known to the unknown
- The known specie is the mass of H₂ ;
find the number of moles of the specie;
number of moles =
Molar mass of H₂ = 2(1) = 2g/mol
Number of moles = = 0.0004mol
- 3 moles of H₂ will produce 2 moles of NH₃
0.0004 moles of H₂ will produce = 0.00027moles of NH₃
1 mole of a substance contains 6.02 x 10²³ molecules
0.00027mole of NH₃ will contain 0.00027 x 6.02 x 10²³
= 1.61 x 10²⁰ molecules
Answer: 0.84 g
Explanation:
Given: moles of iron = 0.015
Molar mass of iron = 56 g/mol
Thus 0.84 g of iron participated in the chemical reaction.
Answer : 69.44 mL
Explanation : Here we can use the formula as
Where we have the value of
= 0.0887 M
= 0.0224 M and
= 275 mL
So, substituting the above values in the given equation we get,
0.0887 X x = 275 X 0.0224
Therefore, x = 69.44 mL
So it will require 69.44 mL.
Explanation : Here we can use the formula as
Where we have the value of
So, substituting the above values in the given equation we get,
0.0887 X x = 275 X 0.0224
Therefore, x = 69.44 mL
So it will require 69.44 mL.