2 years ago

Which letter indicates the most sudden change in temperature

Chemistry

1 answer:

mr_godi [17]2 years ago

5 0

Answer:

J 9. , indicates the most sudden change in temperature

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Please solve quickly!!!

Maurinko [17]

Answer:

18 oxygen atoms

Explanation:

in order to from the 6 molecules carbon dioxide and 6 molecules of water you will have a total of 18 oxygen atoms

3 0

2 years ago

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:

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

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2 years ago

2 HCI → H2 + Cl2<br> Endothermic or exothermic

Oksana_A [137]

Answer:

Exothermic

Explanation:

I think it is exothermic because heat is being released

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2 years ago

Is the element Americium a metal, metalloid, or a nonmetal?

MaRussiya [10]

Americium is a metal.

6 0

2 years ago

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PLS HURRYThe moon does not light up by itself. Instead, it reflects light from the sun. Question 10 options: True False

alukav5142 [94]

Answer:

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Explanation:

i took the test

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2 years ago