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Yuri [45]
3 years ago
9

How many grams of kno3 pellets must be dissolved in water in order to prepare 100 ml of a 8 m kno3?

Chemistry
1 answer:
Montano1993 [528]3 years ago
4 0
In 8M of KNO3, there are x moles of KNO3 divided by (100/1000)L of water (because molarity is concentration, given by no. of moles divided by total volume in liters).

by changing the subject of formula, x = 0.1L × 8M = 0.8mol

given the no. of mol of KNO3, mass of KNO3 is given by no. of mol multipled by the relative molecular mass of KNO3.

mass = 0.8mol × 101.10g/mol (or whatever your periodic table says) = 80.88g
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8 0
3 years ago
What is the mass of 8.8 x 10^22 of magnesium
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0.05

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Explanation:

In a mole of any substance, there exist

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So here, we got:

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3 years ago
d) A short ton of coal holds about 2.24 x 107 J of energy and costs about $56.45 per short ton. How many Joules of energy in the
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396811.337 J

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$56.45 of coal have 2.24\times 10^{7}\ J of energy.

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I think it is b.

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In an open system the vapor pressure is equal to the
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Answer: In an open system the vapor pressure is equal to the outside air pressure.

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