How many molecules are 24.7 grams of methane gas?

9.3 × 10²³ molecules  

Explanation:

Given data:

Mass of methane = 24.7 g

Number of molecules = ?

Solution:

The given problem will solve by using Avogadro number.

It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.

The number 6.022 × 10²³ is called Avogadro number.

For example,

18 g of water = 1 mole = 6.022 × 10²³ molecules of water

For 24.7 g methane:

Number of moles = mass/ molar mass

Number of moles = 24.7 g/ 16.04 g/mol

Number of moles = 1.54 mol

1 mole = 6.022 × 10²³ molecules

1.54 ×  6.022 × 10²³ molecules

9.3 × 10²³ molecules  

why is cellular respiration important for homeostasis?

it changes food into energy that the organism can use.

which of the following is most likely to happen if a cell is not able to divide?

the cell will not be replaced when it is damaged.

explanation:

6.4 cm (max) - 25 cm (min)