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3 years ago

8

Iron has a density of 7.874 g/cm3 what is the mass of a rectangular block of iron with dimensions of 3.000 cm by 4.000cm by 5000

cm

1 answer:

Gemiola [76]3 years ago

4 0

Answer:

mass=? (use the formula given)

Explanation:

density=mass(g)/volume(cm³)

7.874g/cm³=mass x (60000cm³)

mass=?

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A sample of gas contains 0.1500 mol of HCl(g) and 7.500×10-2 mol of Br2(g) and occupies a volume of 9.63 L. The following reacti

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Answer:

9.63 L.

Explanation:

Hello,

In this case, the undergoing chemical reaction is:

$2HCl(g) + Br_2(g)\rightarrow 2HBr(g) + Cl_2(g)$

So the consumed amounts of hydrochloric acid and bromine are the same to the beginning based on:

$n_{Br_2}^{consumed}=0.1500molHCl*\frac{1molBr_2}{2molHCl}=0.075molBr_2$

In such a way, the yielded moles of hydrobromic acid and chlorine are:

$n_{HBr}=0.1500molHCl*\frac{2molHBr}{2molHCl}=0.1500molHBr \\n_{Cl_2}=0.1500molHCl*\frac{1molCl_2}{2molHCl}=0.075molCl_2$

Thus, the volume of the sample, after the reaction is the same as no change in the total moles is evidenced, that is 9.63L.

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Hope this helped

Brainliest is appreciated

Good luck

~ Emmy

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