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lions [1.4K]
3 years ago
11

Which of the following is a trend in the periodic table from top to bottom?

Chemistry
2 answers:
Feliz [49]3 years ago
4 0

Answer:

Number of neutrons -

because the proton number increases as you go down the group so the number of neutrons does do.

You can have 87 protons and just 8 neutrons

Explanation:

Shtirlitz [24]3 years ago
3 0
Number of neotrons because it is
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What is the theoretical yield of moles of hydrogen that can be produced from 0.032g of MG?
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Answer:

1.31x10⁻³ moles of H₂

Explanation:

This is the equation:

Mg(s)  +   2H₂O (g)   →   Mg(OH)₂ (aq)   +    H₂(g)

Ratio is 1:1, so 1 mol of Mg is needed to produce 1 mol of H₂

Mass / Molar mass = Mol

0.032 g / 24.3 g/m = 1.31x10⁻³ moles

1.31x10⁻³ moles of H₂(g)

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Which of the following words mean ä substance formed by chemically combining two or more elements
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B. Compound

Explanation:

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A (True)

Explanation:

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