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Trava [24]
3 years ago
12

Help meh plz!!!

Chemistry
2 answers:
exis [7]3 years ago
3 0
D excretory system releases waste like when you use the bathroom and stuff. :)
Genrish500 [490]3 years ago
3 0
<span>D. excretory system...</span>
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How much time is needed to deposit 1.0 g of chromium metal from an aqueous solution of crcl3 using a current of 1.5 a?
PSYCHO15rus [73]
The metal component of the given compound, CrCl3, is chromium. The number of moles per 1 g of chromium is calculated through the equation below,

        n = (1 g Cr)(1 mol Cr/51.996 g Cr)
              n = 0.0192 mol Cr(3 electrons/1 mol Cr) 
                n = 0.0577 e-

Determine the number in charge by multiplying with Faraday's constant,

      C = (0.0577 mol Cr)((1 F/1 mol e-)(96485 C/ 1F)
             C = 5,566.87 C

Then, calculate time by dividing the charge with the current,

     t = 5566.87 C/1.5 A 
     t = 3711.25 minutes
     t = 61.84 hours

<span><em>Answer: 61.84 hours</em></span>


8 0
3 years ago
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A geochemist examines a piece of metal that he found in the soil. He performs tests to identify the metal from its density, elec
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what r the statements?

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3 years ago
How many grams of aluminum oxide will you need to start with in order to make 6500 g of aluminum hydroxide?
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Explanation:

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3 0
2 years ago
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What is the name of this hydrocarbon?
Cerrena [4.2K]

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C. 2-methylpropane

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Here, it is in the second carbon atom in propane.

The branched group is methyl- which is a methane molecule that has lost a hydrogen atom.

This makes ths name of the compound to be:

2-methylpropane

6 0
3 years ago
Can a substance be cooled to a temperature below its freezing point
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Pure, crystalline solids have a characteristic melting point, the temperature at which the solid melts to become a liquid. The transition between the solid and the liquid is so sharp for small samples of a pure substance that melting points can be measured to 0.1oC. The melting point of solid oxygen, for example, is -218.4o<span>C.</span>
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