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3 years ago

The number of protons plus the number of neutrons equals the _____.

Chemistry

2 answers:

MrRa [10]3 years ago

7 0

It equals the atomic mass.

Zanzabum3 years ago

6 0

Answer: The number of protons plus the number of neutrons equals the atomic mass.

Explanation:

Atomic mass is defined as total number of protons and neutrons in the atom.

It is an average mass of an atom.

It is expressed in atomic mass unit that is a.m.u.

It is denoted with symbol 'A'.

$A =\text{number of protons + number of neutrons}$ .

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3 years ago

How many liters of oxygen are required to react completely with 14.8 mol of Al?

Bond [772]

Answer:

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Explanation:

We will need a balanced equation with moles, so let's gather all the information in one place.

4Al + 3O₂ ⟶ 2Al₂O₃

n/mol: 17.4

1. Moles of O₂

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You haven't given the conditions at which the volume is measured, so I assume it is at STP (0 °C and 1 bar).

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