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sleet_krkn [62]
2 years ago
6

Which is a quantitative measurement? O Taste O Hardness O 15 g O Color

Chemistry
1 answer:
DaniilM [7]2 years ago
6 0

Answer:

HARDNESS

Explanation:

hope this helps

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Is this reaction balanced.
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What reaction is balanced

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). In a titration, a student obtained an average titre value of 3.9 cm3 of 0.3 M HCl. If the volume of Na2CO3 solution used is 1
Oliga [24]

Answer:

I) 0.0585 M

ii)6.2 g dm-3

Explanation:

The reaction equation is given as;

Na2CO3(aq) +2HCl(aq)------> 2NaCl(aq) + CO2(g) +H2O(l)

Concentration of acid CA= 0.3 M

Volume of acid VA= 3.9 cm^3

Concentration of base CB= the unknown

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Number of moles of acid NA= 2

Number of moles of base NB= 1

From;

CAVA/CBVB= NA/NB

CAVANB=CBVBNA

CB= CAVANB/VBNA

substituting values;

CB= 0.3 × 3.9 × 1/ 10.0 × 2

CB= 0.0585 M

ii) mass concentration= molar concentration × molar mass

Molar mass of Na2CO3= 106 gmol-1

Mass concentration= 0.0585 × 106 = 6.2 g dm-3

5 0
3 years ago
At constant volume, the heat of combustion of a particular compound, compound A, is –3568.0 kJ/mol. When 1.411 g of compound A (
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–3568.0 kJ/mol * 1.411 g / 115.27 g/mol = -43.67 kJ<span>

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</span>
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100.0 g x 0.125 = 12.5 g remaining

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3 years ago
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