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d1i1m1o1n [39]
4 years ago
11

If 0.5 moles of CaO is mixed into 2 liters of solution, what is the molarity? Group of answer choices 0.25 moles / liter 4 moles

/ liter 0.5 moles / liter 2 moles / liter
Chemistry
1 answer:
Vsevolod [243]4 years ago
8 0

Answer:

The correct answer is 0.25 moles/liter

Explanation:

Molarity is a measure of concentration and is defined as the moles of solute in 1 liter of solution.

2 L solution-----0,5 moles of CaO

1 L solution -----x= (1 L solutionx0,5 moles of CaO)/2 L solution =

<em>x=0, 25 moles of Cao ---> 0,25M</em>

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If I have one mole of sulfur, how many atoms would that be?
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Answer:

Atoms of sulfur = 9.60⋅g32.06⋅g⋅mol−1×6.022×1023⋅mol−1

Explanation:

because the units all cancel out, the answer is clearly a number, ≅2×1023 as required.

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Question - Complete and balance the following chemical equations:
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In 1909 Fritz Haber discovered the workable conditions under which nitrogen, N2(g), and hydrogen, H2(g), would combine using to
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Answer : 51.8 g of nitrogen are needed to produce 100 grams of ammonia gas.

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Mass of NH_3 = 100 g

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Molar mass of N_2 = 28 g/mole

First we have to calculate moles of NH_3.

\text{ Moles of }NH_3=\frac{\text{ Mass of }NH_3}{\text{ Molar mass of }NH_3}= \frac{100g}{27g/mole}=3.7moles

The given balanced chemical reaction is,

N_2(g)+3H_2(g)\rightarrow 2NH_3(g)

From the given reaction, we conclude that

2 moles of NH_3 produced from 1 mole of N_2

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Now we have to calculate the mass of N_2.

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5 0
3 years ago
A fish company delivers 22 kg of salmon, 5.5 kg of crab and 3.48 kg of oysters to your seafood restaurant. What is the mass, in
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Answer:

Mass of sea food = 30.98 Kg

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Salmon, crab and oysters all are sea food.

Mass of sea food = Mass of salmon + Mass of crab + mass of oyster

Mass of salmon = 22 kg

Mass of crab = 5.5 kg

Mass of oysters = 3.48 kg

Mass of sea food = Mass of salmon + Mass of crab + mass of oyster

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3 years ago
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