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galina1969 [7]
3 years ago
10

A 30.0 mL sample of 2.3 M Cu(OH)2 sample was titrated to with 48.5 mL of HNO3 to find

Chemistry
1 answer:
navik [9.2K]3 years ago
8 0

Answer:

2.8 M HNO3

Explanation:

                 Cu(OH)2 + 2HNO3 ---> Cu(NO3)2 + 2H2O

                 1 mol           2 mol

The number of moles Cu(OH)2 in the sample:

2.3 mol/L*0.0300L = 0.069 mol

The number of moles HNO3  in the solution of HNO3 that was used for titration

x mol/L*0.0485L = 0.0485x mol

From equation we can see that number of moles HNO3 = 2 times number of moles Cu(OH)2.

So, we can write

0.0485x = 2*0.069

x = 2*0.069/0.0485 = 2.8 M HNO3

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horrorfan [7]

Answer:  8556 mm, or 855.6 cm (8560 mm to 3 sig figs)

Explanation:  Convert mm to cm by dividing by 10 (1cm/10mm)

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Calculate the volume occupied by 1.40 kg of foil in cm^3.  1.40kg = 1400g

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We want Length:

Length = Volume/Area

L = (518.5 cm^3/0.606 cm^2)

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5 0
2 years ago
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The volume measured using such a cylinder will be reported to the nearest 10th mL.

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1 year ago
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PolarNik [594]

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Both have the same amount of particles.

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