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Yanka [14]
3 years ago
6

The time it takes for a celestial body to make one complete turn on its axis is a(n)

Chemistry
1 answer:
frozen [14]3 years ago
4 0

Answer:

About 24 hours

Explanation:

Think of it as Earths spin

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Which prefix is needed when naming SO2
lara31 [8.8K]

Answer:

<em>di-</em>

Explanation:

Sulfur dioxide

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4 years ago
Although coal is a complex mixture of substances, its elemental composition can be approximated by the formula <img src="https:/
Svetllana [295]

Answer:

The correct answer is option b.

Explanation:

2C_{135}H_{96}O_9NS+313O_2\rightarrow 270CO_2+2NO_2+2SO_2+96H_2O

Mass of coal burned = 1.00\times 10^6 metric ton = 1.00\times 10^6\times 10^3 kg=10^9 kg[/tex]

1 metric ton = 10^3kg

Molar mass of coal :

135\times 12g/mol+96\times 1g/mol+9\times 16 g/mol+1\times 14 g/mol+1\times 32 g/mol=1906 g/mol=1.906 kg/mol

1 g = 0.001 kg

Moles of coal ,n :\frac{10^9 kg}{1.906 kg/mol}=5.247\times 10^8 mol

If 2 moles of coal on combustion gives 270 moles of carbon dioxide than n moles of coal will give;

5.247\times 10^8 mol\times \frac{270}{2}=7.083\times 10^{10} mol of carbon dioxide.

Molar mass of carbon dioxide gas = 44 g/mol = 0.044 kg/mol

Mass of 7.083\times 10^{10} mol of carbon dioxide:

7.083\times 10^{10} mol\times 0.044 kg/mol=3.11\times 10^{11} kg

5 0
3 years ago
How many equivalents of Mg2+ are present in a solution that contains 2.60 moles of Mg2+ ?
harina [27]

Answer:

Science. Chemistry. Chemistry questions and answers. How many equivalents of Mg2+ are present in a solution that contains 2.65 moles of Mg2+ ? Express your answer using three …

Expert Answer. 100% (5 ratings) Number of equivalents of an ion …. View the full answer. Transcribed image text: Question 4 (0.5 points) How many equivalents of Mg2+ are present in …

how many equivalents of Mg2+ are present in a solution that contains 2.75 mol of Mg2+?

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5.50 eq

Explanation:

3 0
1 year ago
When a scientific theory has been tested and proved by the scientific community, it
beks73 [17]

Answer:

True

Explanation:

When a theory is proven over and over it will become a law

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3 years ago
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Which of the drawings represents the gas after the temperature is lowered from 350 k to 80 k? the boiling point of the gas is 90
jeka57 [31]
Provide with image. Thank you
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