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2 years ago

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Pure gold has a density of 19.3 g/cm³. if it is made into a crown. what will be the density of the crown? how can you find out i

f the crown is indeed made of pure gold and nothing else?

1 answer:

Ulleksa [173]2 years ago

7 0

Answer:

19.3g cm^3

If it deviates from the original 19.3g cm^3

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Liono4ka [1.6K]

Answer:

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Explanation:

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2 years ago

What is the mass in grams of 120 liters at STP oh He gas

skad [1K]

The mass of He gas = 21.428 g

<h3>Further explanation</h3>

Given

120 liters of He gas

Required

the mass in grams

Solution

Conditions at T 0 ° C and P 1 atm are stated by STP (Standard Temperature and Pressure). At STP, Vm is 22.4 liters/mol.

Mol for 120 L :

$\tt \dfrac{120}{22.4}=5.357~moles$

Mass of He gas(MW=4 g/mol) :

$\tt mass=mol\times Ar\\\\mass=5.357\times 4=21.428~g$

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2 years ago

What is the pOH of .12 M HNO3.

Klio2033 [76]

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2 years ago

What happens to the orbit of earth when the mass of the sun is reduced to 75,000?

Neporo4naja [7]

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3 years ago

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mote1985 [20]

It is physical changes.

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