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3 years ago

Someone help me am i right or wrong

Chemistry

2 answers:

kirill115 [55]3 years ago

4 0

Answer: Yes your right

steposvetlana [31]3 years ago

3 0

Answer:

You right!

Explanation:

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A 16.1 mL sample of Ba(OH)2 is titrated with H3PO4. If 32.7 mL of 0.314 M H3PO4 is needed to reach the endpoint, what is the con

Zepler [3.9K]

Answer:

$M_{base}=0.957M$

Explanation:

Hello,

This problem could be solved in terms of normality as follows:

- The normality of phosphoric acid (triporitic) is:

$N_{acid}=0.314\frac{mol}{L}*\frac{3eq-g}{1mol}=0.942N$

Thus, the normality of barium hydroxide turns out:

$N_{base}=\frac{N_{acid}V_{acid}}{V_{base}}=\frac{0.942N*32.7mL}{16.1mL} =1.91N$

Finally, the molarity:

$M_{base}=1.91\frac{eq-g}{L}*\frac{1mol}{2eq-g}=0.957M$

Best regards.

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4 years ago

Read 2 more answers

Calculate the grams of CaCl2 necessary to make a 0.15M solution.

NNADVOKAT [17]

Answer:

Gram molecular mass = 40 + (35.5)2 = 111g

Mass of $CaCl_2$ in 1 mole = 111g

Mass of $CaCl_2$ in 0.15 mole = 111 × 0.15 = 16.65 g

8 0

4 years ago

Hey<br>here to help and to serve

My name is Ann [436]

Answer:

lol thx

Explanation:

5 0

3 years ago

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1 dozen apples=2.0kg whats the mass of 7 red apples

n200080 [17]

Answer:2.0x 7=14

Explanation:simce 1 dozen of apples is 2.0kg just multiply it by the 7 red apples which gives u 14 and that’s the mass of the apples

4 0

3 years ago

A chemist adds 135.0 mL of a 0.21M zinc nitrate (Zn(NO3) solution to a reaction flask. Calculate the mass in grams of zinc nitra

yKpoI14uk [10]

Answer:

5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.

Explanation:

$Molarity=\frac{\text{Moles of solute}}{\text{Volume of the solution (L)}}$

Moles of zinc nitrate = n

Volume of the solution = 135.0 mL = 0.1350 L

Molarity of the solution = 0.21 M

$0.21 M=\frac{n}{0.1350 L}$

$n=0.21M\times 0.1350 L=0.02835 mol$

Mass of 0.02835 moles of zinc nitrate:

0.02835 mol × 189 g/mol = 5.358 g ≈ 5.36 g

5.36 grams the mass in grams of zinc nitrate the chemist has added to the flask.

8 0

4 years ago