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s2008m [1.1K]
2 years ago
10

What is the number of valence electrons in a calcium atom? * 8 2 18 20​

Chemistry
1 answer:
hoa [83]2 years ago
4 0

Answer:

2

Explanation:

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Which statement summarizes the difference between mass and weight?
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Mass is the amount of matter in an object.

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What is the name of(NH4)3PO4
Tju [1.3M]

Answer:

What is the name of the compound (NH4) 3PO4? (NH)4+ is an ammonium radical and (PO4) 3- is a phospate radical. When we start writing the compound,the valency of phosphate goes to ammonium as subscript,and that of ammonium goes to phosphate. Hence the formula (NH4)3 PO4 and it's name is ammonium phospate.

Explanation:

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3 years ago
Consider two solutions: solution x has a ph of 4; solution y has a ph of 7. from this information, we can reasonably conclude th
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<span>Consider two solutions: solution X has a pH of 4; solution Y has a pH of 7. From this information, we can reasonably conclude that </span>the concentration of hydrogen ions (H⁺) or hydronium ions (H₃O⁺) in solution X is thousand times as great as the concentration of hydrogen ions or hydronium ions in solution Y.
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Solution Y: c(H⁺) = 10⁻⁷ mol/L = 0,0000001 mol/L.
0,0001 mol/L / 0,0000001 mol/L = 1000.

3 0
3 years ago
Which Bond is the Least Polar? <br><br> a) H-O <br> b) H-F<br> c) H-I<br> d) H-H
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I'm not sure on this I'm sorry I can't help you I wish I could!
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