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Svet_ta [14]
2 years ago
10

Consider the reaction:

Chemistry
1 answer:
Flura [38]2 years ago
5 0

Answer:

2 one is the correct one

Explanation:

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2 years ago
650. J is the same amount of energy as A. 155 cal. B. 2720 calC. 650 cal.D. 1550 cal.
sladkih [1.3K]

Answer:

A\text{ : 155 cal}

Explanation:

Here, we want to convert J to cal

Mathematically:

1\text{ cal = 4.186 J}

Thus, to get our answer in cal, we divide the value given by 4.186

We have that as:

\frac{650}{4.186}\text{ = 155 cal}

5 0
1 year ago
The chemical properties of calcium and strontium are similar because both
Feliz [49]

Answer:

Number of valence electrons

Explanation:

8 0
2 years ago
An atom of sodium-23 (Na-23) has a net charge of
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Answer:

Protons= 11

neutrons= 12

electrons = 10

Explanantion:

Look for Na on periodic table

Atomic Number = 11

Atomic Mass = 23 (round it to be an integer)

Number of protons = Atomic number = 11

Number of neutrons = Atomic mass - atomic number = 23-11 =12

Number of electrons = 11 - e = ´+1 , electrons = 10

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2 years ago
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