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Amiraneli [1.4K]
2 years ago
11

Using ohm's law, explain how voltage changes in relation to current, assuming that resistance remains constant.

Chemistry
1 answer:
UNO [17]2 years ago
4 0
1.) Ohm's law is understood as I = V/R. Given that resistance is constant, then voltage changes directly proportional to current.
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How do you Calculate the molarity of 250 ml of solution in which 2.7 g of MgCl2 are dissolved
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Answer:

Molar mass of MgCl2 is 95 g/mol

Mg = 24 g/mol and Cl = 35.5 ×2 = 71 g/mol

moles = mass given/ molar mass

= 2.7/95 = 0.028 mol

volume = 250/1000 = 0.25 dm3 (ml is the same as dm3)

molarity of MgCl2 = moles/volume

= 0.028/0.25

= 0.112 mol/dm3

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2 years ago
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Answer:

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Answer:

its A

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