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spin [16.1K]
3 years ago
8

What is the molality of a solution containing 15 g NaCl dissolved in 50 g of water

Chemistry
2 answers:
enot [183]3 years ago
7 0

Answer:

cdjkekendnekekekeknenwkwkwkwnrnrnrjejjwjwksnsjnrheifjfuufjeenenej

faltersainse [42]3 years ago
4 0
Hopes this helps:

Answer: 5.132 mol/kg

How I got the answer I looked it up. Please mark as brainlist if it’s right.
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Potassium chlorate (used in fireworks, flares, and safety matches) forms oxygen and potassium chloride when heated. KClO3(s) → K
harina [27]

Answer:

10.56g

Explanation:

From the reaction equation, we can see that it is unbalanced. In the balanced state, 2 moles of KClO3 will yield 3 moles oxygen.

Let's calculate the actual number of moles now. We first divide the mass of the KClO3 by the molar mass. Molar mass of KClO3 = 39 + 35.5 + 3(16) = 122.5g/mol

The number of moles is thus 26.4/122.5 = 0.22 mole

If 2 moles KClO3 gave 3 moles O2, this means 0.22 moles will give (0.22 × 3)/2 = 0.33 mole

To calculate the mass of oxygen formed, we multiply the molecular mass of oxygen molecule by the number of moles

The molecular mass of oxygen molecule = 16 × 2 = 32g/mol

The mass formed = 32 × 0.33 = 10.56g

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What is a valence electron ?
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