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3 years ago

Which mineral group is composed of compounds that contain atoms of sulfur and one or more metals?

Chemistry

1 answer:

Oksi-84 [34.3K]3 years ago

8 0

Answer:

The answer to your questions is: C. Sulfides

Explanation:

A. Phosphates these compounds do not have sulphur, they are composed by phosphate and oxygen, So this answer is wrong.

B. Sulfates are formed by sulphur and oxygen, not for a metal, then this is not the right answer.

C. Sulfides are molecules formed by a metal and sulphur, this is the anwser to the question.

D. Silicates are formed by sillicon and oxygen, this option is incorrect.

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Which explains the basis of the Biuret test? a. Under base conditions, copper ions bind to the amino groups of proteins and chan

Ugo [173]

Answer:A

Explanation:

In the Biuret test, the copper ions bind covalently to the amino groups as shown in the image to form a violet complex. This violet complex is responsible for the colour change as shown

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3 years ago

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2 KClO_2 produces 2 KCl+ 3O_2 when heated. If this reaction produces 82.8 g of KCl how many grams of O2 were produced?

Ad libitum [116K]

Answer:

37.046 grams of oxygen gas were produced.

Explanation:

$2KClO_2\rightarrow 2KCl+ 3O_2$

Moles of potassium chlorite = $\frac{82.2 g}{106.5 g/mol}=0.7718 mol$

According to reaction 2 moles of potassium chlorite gives 3 moles of oxygen gas.

Then 0.7718 moles of potassium chlorite will give:

$\frac{3}{2}\times 0.7718 mol=1.1577 mol$ of oxygen gas.

Mass of 1.1577 moles of oxygen gas:

1.1577 mol × 32 g/mol = 37.046 g

37.046 grams of oxygen gas were produced.

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4 years ago

W + BgCz2 --> WCz + Bg<br> Balance this equation

yanalaym [24]

Answer: W + BgCz2 arrow WCz + Bg

2 W + BgCz2 arrow 2 WCz + Bg

Explanation:

Cz has 2 so you balcne the other side of WCz.

Since you Balcanes the Cz you changed the W and you Balcanes the other W on the left side.

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3 years ago

Explain how deep ocean currents form.

vivado [14]

Answer:

Deep ocean currents (also known as Thermohaline Circulation) are caused by: The sinking and transport of large masses of cool water gives rise to the thermohaline circulation, which is driven by density gradients due to variations in temperature and salinity. The earth's rotation also influences deep ocean currents.

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3 years ago

True or false, when a material loses thermal energy, it usually contracts.

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Answer:

True

Explanation:

Whenever something loses thermal energy, it contracts and becomes smaller.

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