3 years ago

Calculate the number of atoms in a 6.29 x10^3 g sample of lithium

Chemistry

1 answer:

Over [174]3 years ago

4 0

6,290

Hope this helps!!

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What happens to the composition of an atom to cause it to become positively or negatively charged?

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It gains or loses electrons to become like the Noble gases having 8 valence electrons to become the most stable.

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Calculate the density of sulfuric acid if 35.4 mL of the acid weighs 65.14 g

Nadya [2.5K]

M/V=D
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The density of the sulfuric acid would be about 1.84g/mL

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The tiara worn by Kate Middleton for her wedding to Prince William of England contains 888 diamonds and belongs to the British m

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Answer:

The number of atoms in the gemstones of that tiara is $8.9125\times 10^{24} atoms$ .

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Number of diamonds ion tiara = 888

Mass of each diamond = 1.0 carat = 0.200 g (given)

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$888\times 0.200 g=177.600 g$

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Atomic mass of carbon atom = 12 g/mol

Moles of 77.600 g of carbon = $\frac{177.600 g}{12 g/mol}=14.800 mol$

Number of atoms of carbon 14.800 moles:

$14.800 mol\times 6.022\times 10^{23} atoms =8.9125\times 10^{24} atoms$

The number of atoms in the gemstones of that tiara is $8.9125\times 10^{24} atoms$ .

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Vladimir [108]

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The more reactive element replaces less reactive element during chemical reaction.

Since, potassium is more reactive than beryllium. When potassium reacts with beryllium choride, it replaces beryllium and forms potassium chloride and produces beryllium.

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