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mixer [17]
3 years ago
7

Your science teacher removed the gas from a birthday balloon. They discovered that the gas is made of the element helium. Inside

that atom is:
A. A new substance
B. Protons, neutrons and electrons
C. A different element
D. All of the above
Chemistry
2 answers:
slega [8]3 years ago
8 0
The answer would be “B” because a substance and element represent a structure larger than a single atom. Please mark as Brainliest answer!
soldier1979 [14.2K]3 years ago
4 0
D is the answer I think
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If there are 2 chlorine atoms per molecule then I think that the answer is 26 chlorine atoms.

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8. (02.04 MC)
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3p^2

Explanation:

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Which best describes a compound such as sodium chloride?
gayaneshka [121]

Answer:

check it below

Explanation:

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5 0
3 years ago
Determine the mass in grams of 3.75 x 10^21 atoms of zinc. (the mass of one mole of zinc is 65.39 g)
Nastasia [14]

Answer: The mass in 3.75 \times 10^{21} atoms of zinc is 0.405 g.

Explanation:

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Moles = \frac{3.75 \times 10^{21}}{6.022 \times 10^{23}}\\= 0.622 \times 10^{-2}\\= 0.0062 mol

As moles is the mass of a substance divided by its molar mass. So, mass of zinc (molar mass = 65.39 g/mol) is calculated as follows.

Moles = \frac{mass}{molar mass}\\0.0062 mol = \frac{mass}{65.39 g}\\mass = 0.405 g

Thus, we can conclude that the mass in 3.75 \times 10^{21} atoms of zinc is 0.405 g.

6 0
3 years ago
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