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valina [46]
3 years ago
10

Which number should be placed in the blank to make the equation balanced? ___ Mg + P4 → 2 Mg3P2

Chemistry
1 answer:
Anestetic [448]3 years ago
3 0
The balanced equation will be:
6Mg + P(sub 4) -> 2Mg(sub 3)P(sub 2)
On the right side your Magnesium is 2*3 which equals 6, hence the 6 in front of the Magnesium on the left side. Your Phosphorus on the right side is 2*2 which equals 4, so you do not need another number in front of the Phosphorus on the left side. I hope you have a great day and I hope I helped the understanding behind balancing formulas!!
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6 0
3 years ago
Please please please please help
Pavel [41]

Answer:

Atomic #: 82

Mass #: 206

Charge: 4+

# of protons: 82

# of electrons: 78

# of neutrons: 124

Explanation:

Atomic #: look at the bottom left #, it's always the atomic #.

Mass #: look at the top left # it's always the mass #.

Charge: they give you the charge which is shown on the upper right of the element.

# of protons: is the atomic #

# of electrons: also the atomic # minus 4 bc the charge is a positive 4, indicating that some electrons 'left'.

# of neutrons: 206 (mass # is protons + neutrons) minus 82 (atomic#) which is 124.

6 0
3 years ago
If 12.7 grams of hydrogen reacted with an unknown amount of oxygen, how many grams of water would be produced? (Write a balanced
nirvana33 [79]

Answer:

48 g.

Explanation:

7 0
3 years ago
Read 2 more answers
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