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Studentka2010 [4]
3 years ago
7

What element has 47 protons in its nucleus?

Chemistry
1 answer:
sesenic [268]3 years ago
5 0

Answer:

b). silver (Ag)

Explanation:

If you look at the periodic table, you just need to look at the atomic number of the element, because the atomic number tells you how many protons there are in the nucleus of the element.

But do be careful because some periodic tables have the molar mass at the top left corner, but the one I use has the atomic number at the top left corner, so make sure you look for the atomic number and not the molar mass.

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Write the chemical formula of the following:
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Answer:

1.Ca(OH)2

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5.Zn3(PO4)2

6.LiNO3

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8. K2CO3

9.MgSO4

10.Ca3(PO4)2

5 0
3 years ago
How do you find the atomic weight of an atom?
wariber [46]

Answer: The atomic weight of any atom can be found by multiplying the abundance of an isotope of an element by the atomic mass of the element and then adding the results together. This equation can be used with elements with two or more isotopes: Carbon-12: 0.9889 x 12.0000 = 11.8668. Carbon-13: 0.0111 x 13.0034 = 0.1443.

Explanation:

6 0
3 years ago
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Answer:

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Explanation:

6 0
2 years ago
Calculate the number of ammonia molecules in 3.9 g.
disa [49]
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Then convert the moles to molecules by multiplying it with Avogadro’s number:

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0.22900763mols x (6.022 x 10^23 molecs/mol)
= 1.38 x 10^23 molecules
6 0
3 years ago
H2CO3(aq) → CO2(aq) + H2O(l) After strenuous exercise, you breathe heavily, exhaling and removing CO2 from your body. The remova
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Answer:

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Explanation:

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