Answer:
D) Previous models
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<u>1) find molar mass of CH₄</u>

<u>2) determine moles of CH₄</u>

<u>3) multiply by avogadro's number</u>

Answer:
it's harmful
Explanation:
it's harmful to our environment it can endanger our planet and endangered animal species it can also kill lots of plants and we have a hard time burning fossil fuels with limited factories which costs a lot of money.
Answer:
B
Explanation:
four electron in atom in cal
Answer:
Hard water is water that has high mineral content, Soft water is free from dissolved salts of such metals as calcium, iron, or magnesium
Explanation: