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Lelu [443]
3 years ago
10

THIS IS SO IMPORTANT PLEASE HELP!

Chemistry
1 answer:
jeka943 years ago
4 0
Protons: 12
Neutrons: 12
<span>Electrons: 12

The atomic number of Magnesium is 12, so it has to have 12 protons. The atomic mass of Magnesium is 24, so it has to have 12 neutrons since 12+12=24 (electrons don't have weight). You can tell it has 12 electrons because the electrons are always the same number as the protons.</span>
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If you produce .65moles of carbon dioxide when aluminum carbonate is decomposed, how many moles of aluminum carbonate did you st
UkoKoshka [18]

0.22 moles of Al₂(CO₃)₃

Explanation:

The decomposition reaction of aluminium carbonate (Al₂(CO₃)₃):

Al₂(CO₃)₃ → Al₂O₃ + 3 CO₂

Taking account the chemical reaction we devise the following reasoning:

if        1 mole of Al₂(CO₃)₃ produces 3 moles of 3 CO₂

then  X moles of Al₂(CO₃)₃ produces 0.65 moles of 3 CO₂

X = (1 × 0.65) / 3 = 0.22 moles of Al₂(CO₃)₃

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3 years ago
What is the number of atoms in
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343

Explanation:

6 0
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Doctors have fought infections with penicillin for over 50 years. Recently, penicillin has not worked as well as before. Which o
Lilit [14]

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5 0
3 years ago
A cart accelerates at 2m/s2 when a force of 60 N is applied. What is the mass of the cart? Formula: F=ma
Fudgin [204]

Answer:

Mass, m = 30 kg

Explanation:

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m=\dfrac{F}{a}\\\\m=\dfrac{60\ N}{2\ m/s^2}\\\\m=30\ kg

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8 0
4 years ago
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Answer:

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