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3 years ago

Which of the following compounds has only one atom of carbon?

Chemistry

1 answer:

frez [133]3 years ago

8 0

<h3>Answer: CO2</h3>

Explanation:

Well C2H6 there are 2 carbon and 6 hydrogen atoms

and having no number on the right of the letter means there is only one atom

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Assuming that all the energy given off in the reaction goes to heating up only the air in the house, determine the mass of metha

nirvana33 [79]

Answer:

0.92 kg

Explanation:

The volume occupied by the air is:

$35.0m\times 35.0m \times 3.2m \times \frac{10^{3}L }{1m^{3} } =3.9 \times 10^{6} L$

The moles of air are:

$3.9 \times 10^{6} L \times \frac{1.00mol}{22.4L} =1.7 \times 10^{5}mol$

The heat required to heat the air by 10.0 °C (or 10.0 K) is:

$1.7 \times 10^{5}mol \times \frac{30J}{K.mol} \times 10.0 K = 5.1 \times 10^{7}J$

Methane's heat of combustion is 55.5 MJ/kg. The mass of methane required to heat the air is:

$5.1 \times 10^{7}J \times \frac{1kgCH_{4}}{55.5 \times 10^{6} J } =0.92kgCH_{4}$

3 0

3 years ago

Question:

anzhelika [568]

Answer:

A. Chemical

B. physical

Explanation:

7 0

3 years ago

What’s the SI unit of the amount of isopropyl alcohol in a beaker?

Illusion [34]

Answer:

mole

Explanation:

The mole in chemistry is used to represent the amount of any substance. Just like quantifying everyday things like a dozen, score, gross etc, it is a convenient unit of quantity of particles. A mole denotes 6.02 x 10²³particles of a susbstance.

Therefore, a mole is the standard unit(SI) for the amount of isopropyl alcohol in a beaker.

7 0

3 years ago

Proper significant figure: 27.01 + 14.369

Paul [167]

Answer:

<h2>put the bigger number on top then add </h2>

Explanation:

41.369

8 0

3 years ago

What is the best way to make sure graphs are easy to interpret

Neporo4naja [7]

<span>Use descriptive axis labels and legends
</span>

7 0

3 years ago