4 years ago

The element X has 2 valence electrons. its is a

Chemistry

1 answer:

Lesechka [4]4 years ago

6 0

helium, beryllium, magnesium, calcium, strontium, barium, radium. i believe any of these are proper answers.

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3 years ago

Consider the balanced chemical equation that follows. You are asked to determine how many moles of water you can form from 4 mol

kodGreya [7K]

<u>Answer:</u> The correct answer is $4molH_2\times \frac{2molH_2O}{2molH_2}=4 molH_2O$

<u>Explanation:</u>

We are given:

Moles of hydrogen gas = 4 moles

As, oxygen is given in excess. Thus, is considered as an excess reagent and hydrogen is considered as a limiting reagent because it limits the formation of products.

For the given chemical equation:

$2H_2(g)+O_2(g)\rightarrow 2H_2O(l)$

By Stoichiometry of the reaction:

2 moles of hydrogen produces 2 moles of water molecule.

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Hence, the correct answer is $4molH_2\times \frac{2molH_2O}{2molH_2}=4 molH_2O$

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3 years ago

Which of these is not a commonly mined metallic substance?

Sliva [168]

Answer:

C) quartz

Explanation:

Quartz is a common mineral. Also, quartz isn't a metallic substance. I'm hoping that this helps :)

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3 years ago

Is Tungsten conductive

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