Balance the following equations: i. H2SO4 + ….NaHCO3 → Na2SO4 + ….H2O + ……CO2
ii. H2 + I2 → ….HI
iii. …..NaOH + H2SO4 → Na2SO4 + …..H2O
iv. ……FeSO4 → Fe2O3 + SO2 + SO3
v. C3H6O2 + …..O2 → ….CO2 + …..H2O
b) Calculate the molecular masses of the following:
i. H2SO4

ii. CH4

iii. NH3

c) 56g of iron reacts with 71g of chlorine. How many grams of iron react with 35.5g of chlorine?

Hey There!__________________________________________________________________________Balancing the following equations:

(I)

(II)

(III)

(IV)

(V)

_____________________________________Molecular Masses of the following:

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(I)

(ANS)

__________________________________________________________

Solution:

Molecular mass of,

H = 1

S = 32

O = 16

Now,

There are 2 atoms of Hydrogen, 1 atoms of Sulfur and 4 atoms of Oxygen present, thus,

_____________________________________

(II)

(ANS)

_________________________________________________________

Solution:

Molecular Mass,

Carbon = 12

Hydrogen = 1

Now

There are 1 atom of Oxygen and 4 atoms of Hydrogen present, thus,

_____________________________________

(III)

(ANS)

__________________________________________________________

Solution:

Molecular Mass,

Nitrogen = 14 grams

Hydrogen = 1

Now,

There are 1 atoms of Nitrogen and 3 atoms of Hydrogen present, thus,

_____________________________________How many Grams of Iron(fe):

56     71

x       35.5

_____________________________________

Simplify the equation

X = 28 grams

__________________________________________________________

28 grams of Iron(fe) will react with chlorine.

_____________________________________Best Regards,'Borz'

A. Four C–H single bonds and two O=O double bonds.

Explanation:

The chemical reaction proceeds with breaking bonds in the reacting molecules and forming new bonds in the products.In this reaction four single bonds are broken in CH₄ and two double bonds O=O are broken in two molecules of O₂.Also, two double bonds C=O are formed in CO₂ molecules and 4 single bonds O–H are formed in 2 molecules of H₂O (each molecule contain 2 new bonds).So, A is the right answer.