C. Of the products is equal to the reactants.
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Answer:
Isotopes are atoms of the same element with the same number of protons but different number of neutrons.
Hope this helps.
Answer:
Mass = 240 g
Explanation:
Given data:
Number of molecules of NaOH = 3.618 × 10²⁴ molecules
Mass in grams = ?
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
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
For NaOH:
1 mole = 6.022 × 10²³ molecules
3.618 × 10²⁴ molecules × 1 mol / 6.022 × 10²³ molecules
0.6 × 10¹ moles
6 moles
Mass of NaOH:
Mass = Number of moles × molar mass
Mass = 6 mol × 40 g/mol
Mass = 240 g
