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Marysya12 [62]
3 years ago
14

AN object has a volume of 77ml and a mass of 429. What is the density of this object?

Chemistry
1 answer:
pantera1 [17]3 years ago
6 0

Answer:

4.254320865115cm or simplied 4.25cm

Explanation:

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How many grams of As2S3 are in 3.25 moles?
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Answer:

Explanation:

Molar mass of As2S3= {75(2) + 32(3)}

= 150 + 96 = 246g/mol

Amount = 3.25mole

And

Amount = mass/ molar mass

mass = amount × molar mass

Mass = 3.25 × 246

mass = 799.5g

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4 years ago
Gold is a natural resource, because it occurs naturally in the environment and humans use it. Gold cannot be made from other sub
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Answer:

Answer below:

Explanation:

A nonrenewable resource

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3 years ago
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When an object reflects all light, we see (3 points) nothing white light dark blue light red light
alisha [4.7K]

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3 years ago
Purification of nickel can be achieved by electrorefining nickel from an impure nickel anode onto a pure nickel cathode in an el
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Answer: 530 hours

Explanation:

The reduction of Nickel ions to nickel is shown as:

Ni^{2+}+2e^-\rightarrow Ni

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1 mole of Nickel weighs = 58.7 g

Given quantity = 18.0 kg = 18000 g  (1kg=1000g)

58.7 g of Nickel is deposited by 193000 C of electricity

18000 g of Nickel is deposited by = \frac{193000}{58.7}\times 18000=59182282.8C of electricity

Q=I\times t

where Q= quantity of electricity in coloumbs  = 59182282.8C

I = current in amperes = 31.0 A

t= time in seconds = ?

59182282.8C=31.0A\times t

t=1909105.9sec

(1h=3600 sec)

t=530hours

Thus 530 hours are required to plate 18.0 kg of nickel onto the cathode if the current passed through the cell is held constant at 31.0 A

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3 years ago
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