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andreyandreev [35.5K]
4 years ago
5

How is the mass number calculated for an element

Chemistry
2 answers:
scoundrel [369]4 years ago
8 0
Mass number=Atomic number+ number of neutrons. Hope it helps
Anon25 [30]4 years ago
3 0
Find the number of protons and neutrons of that element and add them together. You might need periodic table. Hope it helps.
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The molecular mass of a substance is defined as the mass of how many molecules of the substance
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Answer:

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6 0
3 years ago
1. Except for special cases such as peroxides, oxygen has an oxidation number of _______ in compounds. A. +2 B. –1 C. +1 D. –2
egoroff_w [7]

Answer:

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7 0
3 years ago
WILL MARK BRAINLIEST
ch4aika [34]

Answer:

hope this helps

Explanation:

it will tell you what you need to know

Download pdf
5 0
3 years ago
A gas occupies 3.00 L at standard temperature. The volume at 350 C is 6.84 L.<br> True <br> False
kupik [55]

Answer:

TRUE

Explanation:

Standard temperature is 273K and 350°C is 623K.

V/V' = T/T'

3/6.84 = 273/T'

T' = (273×6.84)/3

=> T' = 623K

So it is true.

7 0
3 years ago
How do phosphates affect the growth of aquatic plants
Naily [24]
If an excess of phosphate enters the waterway, algae, and aquatic plants will grow wildly, choke up the waterway and use up large amounts of oxygen.
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