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creativ13 [48]
3 years ago
13

Let’s say you try to get crafty. Instead of directly heating your carbontetrachloride with the Bunsen Burner, you decide it woul

d be better to drop in a hot chunk of thorium (d = 11.724 g/mL , c = 0.12 J/g*K ) metal. If you have a 29.848 g chunk of thorium, how hot (in K) must you heat the thorium in order for the chunk of metal to have enough energy to heat a 1.027 mL sample of carbontetrachloride at room temperature (298 K) to it's boiling temperature?

Chemistry
1 answer:
sergejj [24]3 years ago
5 0

Explanation:

Below is an attachment containing the solution.

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What is the mass of 1.7 × 1023 atoms of zinc (Zn)?
Rudiy27

Number of moles is defined as the ratio of given mass in g to the molar mass.

The mathematical formula is:

Number of moles = \frac{given mass in g}{molar mass}   (1)

Number of zinc atoms is equal to 1.7\times10^{23}, by Avogadro number, number of moles can be calculated.

As, 1 mol=6.022\times10^{23} atoms, hence,

1.7\times10^{23}\times\frac{1 mol}{6.022\times10^{23} }

= 0.2822 mol

Now, from formula (1), calculate mass in g (molar mass of zinc = 65.4 g/mol)

0.2822 mol = \frac{mass in g}{65.4 g/mol}

mass in g  = {0.2822 mol \times 65.4 g/mol

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Hence, option (C) is the correct answer.



 



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Answer:

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