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frosja888 [35]
3 years ago
11

Which of the following elements has the lowest first ionization energy?

Chemistry
2 answers:
Tanya [424]3 years ago
7 0

Answer:

(Sc)

Explanation:

Vsevolod [243]3 years ago
5 0

Answer:

Scandium (Sc)

Explanation:

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Answer:

c

Explanation:

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3 years ago
If you burn 29.4 g of hydrogen and produce 263 g of water, how much oxygen reacted?
vovikov84 [41]

The reaction between hydrogen and oxygen to form water is given as:

H_2 + O_2 \rightarrow H_2O

The balanced reaction is:

2H_2 + O_2 \rightarrow 2H_2O

According to the balanced reaction,

4 g of hydrogen (4\times 1) reacts with 32 g of oxygen (2\times 16).

So, oxygen reacted with 29.4 g of hydrogen is:

\frac{29.4\times 32}{4} = 235.2 g

Hence, the mass of oxygen that is reacted with 29.4 g of hydrogen is 235.2 g.

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3 years ago
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2 years ago
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The shells further away from the nucleus are larger/smaller and can hold more/less electrons.
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