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Darya [45]
3 years ago
13

How to find the average atomic mass

Chemistry
1 answer:
Grace [21]3 years ago
6 0
The chlorine isotope with 18 neutrons has an abundance of 0.7577 and a mass<span> number of 35 amu. To </span>calculate<span> the </span>average atomic mass<span>, multiply the fraction by the </span>mass<span> number for each isotope, then add them together.
hope this help</span>
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What is the Molar Mass of methylammonium bromide: Use the Periodic Table and round to the nearest hundredths.
egoroff_w [7]

The molar mass of methylammonium bromide is 111u.

<h3>What is molar mass?</h3>

The molar mass is defined as the mass per unit amount of substance of a given chemical entity.

Multiply the atomic weight (from the periodic table) of each element by the number of atoms of that element present in the compound.

Add it all together and put units of grams/mole after the number.

Atomic weight of H is 1u

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Calculating molar mass of  2H_3NCH_3Br =2(1 x3+ 14+12+ 1 x 3 +79) = 111u

Hence, the molar mass of methylammonium bromide is 111u.

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