i think the answer is C3H8O
Answer:
A.It is the same for every sample of a single substance.
Explanation:
Answer:
2.18 mol Ar.
Explanation:
Hello there!
In this case, according to the definition of mole as the amount of particles of a given substance, it is possible to introduce the Avogadro's number to assert that 1 mole of any element contains 6.022x10²³ atoms; thus, the moles of Ar in the given amount of atoms turns out to be:

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Answer:
2850 grams I hope this help
Atoms with the same amount of neutrons are said to belong to the same element.