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denis23 [38]
3 years ago
12

True of false metals like copper are sometimes used to fill cavities in teeth

Chemistry
2 answers:
ElenaW [278]3 years ago
7 0
I'd say false because copper is what they used to drink out of in the middle ages, and it caused them to get very sick, so I doubt they would use copper in your mouth.
Ede4ka [16]3 years ago
7 0
True, metals (like copper) are sometimes used to fill cavities in teeth, which are called 'Metal Fillings'.
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3. How many atoms in 3.91 moles of sodium?
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Answer:

Explanation:

The formula for sodium is Na. It does not form a molecule in some way.

1 mol Na = 6.02*10^23 atoms

3.91 mol = x                                    Cross multiply

x = 3.91 * 6.02 * 10^23

x = 23.65 * 10^23

x = 2.365 * 10^24

Scientific notation is always expressed as a number 1 ≤ x < 10

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sertanlavr [38]

Answer:

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Answer:
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