Fill in the blanks: 1. Relative molecular mass is essentially a number that tells us how many times a single _________(molecule/atom) of a substance is heavier than 1/12th mass of carbon [12/6C]. 2. Whenever gases chemically react, they occur in ______________ (volume/weight) which bear a simple ratio to the products and each other. If gaseous, provided the pressure and temperature of reacting gases and products remain the same.

Home » Fill in the blanks: 1. Relative molecular mass is essentially a number that tells us how many times a single _________(molecule/atom) of a substance is heavier than 1/12th mass of carbon [12/6C]. 2. Whenever gases chemically react, they occur in ______________ (volume/weight) which bear a simple ratio to the products and each other. If gaseous, provided the pressure and temperature of reacting gases and products remain the same.

Fill in the blanks: 1. Relative molecular mass is essentially a number that tells us how many times a single _________(molecule/atom) of a substance is heavier than 1/12th mass of carbon [12/6C].
2. Whenever gases chemically react, they occur in ______________ (volume/weight) which bear a simple ratio to the products and each other. If gaseous, provided the pressure and temperature of reacting gases and products remain the same.

Chemistry | Class 10 | ICSE | Mole concept and Stoichiometry | Selina

Fill in the blanks: 1. Relative molecular mass is essentially a number that tells us how many times a single _________(molecule/atom) of a substance is heavier than 1/12th mass of carbon [12/6C].
2. Whenever gases chemically react, they occur in ______________ (volume/weight) which bear a simple ratio to the products and each other. If gaseous, provided the pressure and temperature of reacting gases and products remain the same.

Solution:

Answer: 1. Molecule

When using a relative scale, the mass of 12C (carbon twelve) is defined as 12 amu; therefore, this is an accurate number. Atomic mass is measured in amu. They tell us about how many times a single molecule of a substance is heavier than 1/12th mass of carbon.

2. Volume

Whenever gases react, they do so in a volume that is a whole number ratio to one another as well as to the volumes of the products, if they are gaseous. This is true as long as the temperature, pressure, and volume of the reacting gases and their products remain constant.

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