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A brick has a mass of 4.0kg and the earth has a mass of 6.0*10^27g.

be sure your answers have the correct number of significant digits.

what is the mass of 1 mole of bricks?

how many moles of bricks have a mass equal to the mass of the earth? write answer as a decimal to one decimal place.

Verified Answer :

Mass of 1 mole of brick is \(\rm 2.4\;\times\;10^2^4\) kg. 2500 moles of brick will weigh the same as the mass of the earth.

(a) Mass of 1 mole of bricks:

Mass of 1 mole = weight \(\times\) Avagadro number

Mass of 1 mole brick = 4.0 \(\times\;6.023\;\times\;10^2^3\)

Mass of 1 mole of brick is \(\rm 2.4\;\times\;10^2^4\) kg.

(b) Number of moles of bricks having mass equal to earth:

= \(\rm \dfrac{mass\;of\;earth}{mass\;of\;1\;mole\;of\;brick}\)

= \(\rm \dfrac{6.0\;\times\;10^2^7}{2.4\;\times\;10^2^4}\)

= 2.5 \(\rm \times\;10^3\) moles

= 2500 moles of brick will weigh the same as the mass of the earth.

For more information, refer to the link:

https://brainly.com/question/20486415

snehashish65

To have the mass equal to that of earth, the required number of moles of bricks are \(2.5 \times 10^{3} \;\rm moles\).

Given data:

The mass of brick is, m = 4.0 kg.

The mass of Earth is, \(M=6.0 \times 10^{27} \;\rm kg\).

Number of moles of brick is, n = 1.

(a)

The mass of 1 mole of bricks is,

\(m'= \rm m \rm \times Avogadro \;Number\\m'= 4.0 \rm \times 6.023 \times 10^{23}\\m' =2.4 \times 10^{24} \;\rm kg\)

Thus, the mass of 1 mole of bricks is  \(2.4 \times 10^{24} \;\rm kg\).

(b)

The number of moles (N) of brick to have mass equal to the mass of the earth is expressed as,

\(N=\dfrac{M}{m'} \\\\N=\dfrac{6.0 \times 10^{27}}{2.4 \times 10^{24}} \\\\N=2.5 \times 10^{3} \;\rm moles\)

Thus, for having the mass equal to the mass of the earth, the brick should have \(2.5 \times 10^{3}\) number of moles.

Learn more about the mole concept here:

https://brainly.com/question/20483253

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