Answer:
H₂ + CuO → Cu + H₂O
Explanation:
We want to balance the given equation;
H₂ + CuO → Cu(OH)₂ + H₂O
To balance this we have to make sure the number of each element on the left is equal to the number of each element on the right.
Thus, the correct balanced equation is;
H₂ + CuO → Cu + H₂O
Answer: no. Moles= 1.382moles
Explanation:
No. Of moles = mass/molar mass
NB : molar mass Al2O3= (27×2)+(16×3)= 102
n= 141/102 = 1.382moles
The orbit gets larger when the mass of the sun is reduced to 75,000.
Density is defined as mass/volume (or m/v).
So,
(126.0 g)/(12.5 cm^3)= 10.08 g/cm^3
If your teacher requires correct significant figures, the answer is 10.1 g/cm^3.
If not, the first answer is fine.
Answer:
Mass =41.36 g
Explanation:
Given data:
Mass of CH₄ = 15 g
Mass of O₂ = 114 g
Mass of CO₂ produced = ?
Solution:
Chemical equation:
CH₄ + 2O₂ → CO₂ + 2H₂O
Number of moles of CH₄:
Number of moles = mass/ molar mass
Number of moles = 15 g /16 g/mol
Number of moles = 0.94 mol
Number of moles of O₂:
Number of moles = mass/ molar mass
Number of moles = 114 g /32 g/mol
Number of moles = 3.6 mol
Now we will compare the moles of CO₂ with both reactant.
O₂ : CO₂
2 : 1
3.6 : 1/2×3.6= 1.8 mol
CH₄ : CO₂
1 : 1
0.94 : 0.94
Number of moles of CO₂ produced by CH₄ are less so it will limiting reactant.
Mass of CO₂:
Mass = number of moles × molar mass
Mass = 0.94 mol × 44 g/mol
Mass =41.36 g