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Likurg_2 [28]
3 years ago
5

When alkali metals are heated with hydrogen they form--------hydrides

Chemistry
1 answer:
lutik1710 [3]3 years ago
6 0
2Na + H₂ = 2NaH (sodium-hydride).
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Which of these objects converts light/radiant energy to chemical energy?
ludmilkaskok [199]

Answer:

nuclear power plant

Explanation:

because it's a nuclear power plant it's supposed to do that

3 0
3 years ago
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What happens to the size of a population if the birth rate decreases while the death rate remains the same?
Sever21 [200]

Answer: It will decrease.

Explanation:

If you had an equal birth and death rate, the population would theoretically stay the same, but since you have more deaths and less births, the population will decrease.

3 0
3 years ago
Suppose that a newly discovered element called centium has 3 isotopes that occure in nature. These are centium -200, centium -20
vodomira [7]

Answer:

The answer to your question is 203.8 g

Explanation:

Data

Average atomic mass = ?

Centium-200

Centium-203

Centium-209

Equal amounts

Process

1.- Determine the abundance of each isotope.

If they are in equal amounts in nature, just divide 100 by 3

             100/3 = 33.33 % or 0.333

2.- Determine the Average atomic mass

Average atomic mass = Atomic mass 1 x abundance + Atomic mass 2 x

                                        abundance + Atomic mass 3 x abundance

- Substitution

Average atomic mass = 200 x 0.333 + 203 x 0.333 + 209 x 0.333

- Simplification

Average atomic mass = 66.6 + 67.6 + 69.6

Result

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3 0
3 years ago
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Natasha2012 [34]

Answer:

Cattles are giving nutrition supply throughout the year----some animals require nutrient enhancement for health

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4 0
4 years ago
A solution has a pH of 2.5. what is the H+
romanna [79]

<u>Answer: </u>The concentration of H^+ in the solution is 3.16\times 10^{-3}M

<u>Explanation:</u>

pH is defined as the negative logarithm of hydrogen ion concentration present in the solution.

pH=-\log [H^+]      .....(1)

We are given:

pH of solution = 2.5

Putting values in equation 1, we get:

2.5=-\log [H^+]

[H^+]=10^{-2.5}

[H^+]=3.16\times 10^{-3}M

Hence, the concentration of H^+ in the solution is 3.16\times 10^{-3}M

4 0
3 years ago
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