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weeeeeb [17]
3 years ago
11

What is silicon used for? -matches -gunpowder -glass -steel can coating

Chemistry
2 answers:
Ad libitum [116K]3 years ago
8 0

Answer:

Silicon can be used to make glass. So your 3rd option.

Explanation:

Nataly_w [17]3 years ago
8 0
I believe the correct answer would be c glass
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Balance the combustion reaction between butane and oxygen. 2C4H10 + O2 → CO2 + H2O
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<h2>Answer:</h2><h3>Balanced equation:</h3>

2C4H10 + 8O2 → 8CO2 + 10H2O

<h3>Description:</h3>

There should be 8 molecules of oxygen which react with 2 molecules of butane to produce 8 molecules of carbon dioxide and 10 molecules of water.


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3 years ago
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4 0
4 years ago
How many grams of potassium chloride are required to make 250 ml of a 0.75 m kcl solution?
DedPeter [7]

Answer:

The solution would need 13.9 g of KCl

Explanation:

0.75 m, means molal concentration

0.75 moles in 1 kg of solvent.

Let's think as an aqueous solution.

250 mL = 250 g, cause water density (1g/mL)

1000 g have 0.75 moles of solute

250 g will have (0.75 . 250)/1000 = 0.1875 moles of KCl

Let's convert that moles in mass (mol . molar mass)

0.1875 m . 74.55 g/m = 13.9 g

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