Question

Calculate the molar mass of the following substance:
A.Ethyne C2H2
B. Sulpher molecule S8
C. Phosphorus molecule P3(Atomic mass of phosphorus=30)
D. Hydrolic acid HCI
E. Nitric acid HNO3​

Answer 1

Answer:

Molar mass is defined as the mass of substance for a given amount. The amount of molecules or atoms or compounds present in one mole of substance is given by this. Molar mass SI unit is g/mol.

The molar mass of the following substances are as follows:

(a) Ethyne, C2H2

Molar mass of ethyne

C2H2 = 2 x 12 + 2 x 1

Molar mass of ethyne = 26 g

(b) Sulphur molecule, S8

Molar mass of sulphur molecule,

S8 = 8 x 32 = 256 g

(c) Phosphorus molecule, P4 (atomic mass of phosphorus = 31)

Molar mass of phosphorus molecule,

P4 = 4 x 31 = 124 g

(d) Hydrochloric acid, HCl

Molar mass of hydrochloric acid,

HCl = 1 + 35.5 = 36.5 g

(e) Nitric acid, HNO3

Molar mass of nitric acid,

HNO3 = 1 + 14 + 3 x 16 = 63 g

HOPE IT'S HELPFUL TO YOU M'LADY

Answer 2

Answer:

Find out the percentage of population estimate of elephants as

per the given data and answer the questions given.

1) Find the states in which the population of elephants has

increased and calculate the rate of increased population (in

percentage). [Estimate your answer upto one decimal place.]

2) Find the states in which the population of elephants has

decreased and calculate the rate of decreased population (in

percentage). [Estimate your answer upto one decimal place.]

3) Name the states where there is no change in the population

of elephants.

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