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Kobotan [32]
3 years ago
10

How many grams are in 2.06x10-4 moles of calcium phosphate

Chemistry
1 answer:
Orlov [11]3 years ago
3 0

Answer:

63.86 mg

Explanation:

Molar mass is the mass of 1 mol of compound / atom.

molar mass of the compound is - 310 g/mol

mass of 1 mol is - 310 g

therefore mass of 2.06 x 10⁻⁴ mol is - 310 g/mol x 2.06 x 10⁻⁴ mol = 0.06386 g

mass of calcium phosphate is - 63.86 mg

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A student determines that 23.1 J of heat are required to raise the temperature of 6.67 g of an
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When energy is transferred from the air to the water, what happens to most of the energy? A. It travels through the water. B. It
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3 years ago
Read 2 more answers
Which of these substances has the lowest pH? 0.5 M HBr, pOH = 13.5 0.05 M HCl, pOH = 12.7 0.005 M KOH, pOH = 2.3
vagabundo [1.1K]
<h3><u>Answer;</u></h3>

0.5 M HBr, pOH = 13.5 ; Has the lowest pH

<h3><u>Explanation;</u></h3>

From the question;

pH = -Log [OH]

or pH = 14 - pOH

Therefore;

For 0.5 M HBr

[H+] = 0.5 M

pH = - Log [0.5]

     = 0.30

For;  pOH = 13.5

pH = 14 - pOH

     = 14 -13.5

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For; 0.05 M HCl

pH = - log [H+]

[H+] = 0.05

pH = - Log [0.05]

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For;  0.005 M KOH,

pOH = - log [OH]

[OH-] = 0.005

pOH = - Log 0.005

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pH = 14 - 2.30

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   pH = 14 -pOH

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3 years ago
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