Answer:
OPTUON C,CHEMICALLY BONDED
Answer:
Explanation:
Given data:
Mass of N₂ = 48.7 g
Moles of N₂ = ?
Molecules of N₂ = ?
Mass of N₂O = ?
Moles of N₂O = ?
Atoms of N₂O = ?
Solution:
Chemical equation:
2N₂ + O₂ → 2N₂O
Number of moles of N₂:
Number of moles = mass/ molar mass
Number of moles = 48.7 g / 28 g/mol
Number of moles = 1.74 mol
Number of molecules of N₂:
1 mole = 6.022 × 10²³ molecules
1.74 mol× 6.022 × 10²³ molecules/1 mol
10.5 × 10²³ molecules
Now we will compare the moles of N₂ with N₂O from balance chemical equation:
N₂ : N₂O
2 : 2
1.74 : 1.74
Moles of N₂O:
1.74 mol
Mass of N₂O:
Mass = number of moles × molar mass
Mass = 1.74 mol × 44 g/mol
Mass = 76.56 g
Answer : The energy required to heat of 1.50 kg iron is, 
Explanation :
Formula used :

or,

where,
Q = heat required = ?
m = mass of iron = 1.50 kg = 1500 g
c = specific heat of iron = 
= initial temperature = 
= final temperature = 
Now put all the given value in the above formula, we get:


Therefore, the energy required to heat of 1.50 kg iron is, 