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valina [46]
4 years ago
11

Which of these is an element?

Chemistry
2 answers:
Yanka [14]4 years ago
6 0

Answer:

A.

Explanation:

The rest are molecules and/or compounds

just olya [345]4 years ago
3 0
B
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27 is the mass number

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Is sublimation exothermic or endothermic
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To solve this we use the equation,

 

M1V1 = M2V2

 

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5 0
4 years ago
Cellular respiration uses glucose and oxygen, which have high levels of free energy, and releases carbon dioxide and water, whic
Alja [10]

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Spontaneous reactions have an increase in entropy (level of disorder) and a decrease in enthalpy (total energy). Cellular respiration goes from a more ordered state (one molecule of glucose) to a more disordered state (several molecules of CO2), and goes from a state with a lot of free energy to one with much less free energy. As a result, respiration is a spontaneous process.

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4 0
3 years ago
Read 2 more answers
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