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Orlov [11]
3 years ago
7

Plsssssssssssssssssssssssssssssssssssssssss help me

Chemistry
1 answer:
Y_Kistochka [10]3 years ago
4 0

Answer:

C

Explanation:

A year is a complete revolution around the Earth

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How many grams of sodium metal are needed to make 29.3 grams of sodium chloride? given the reaction: 2na + cl2 → 2nacl?
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You wish to add 5 mg/l naocl as cl2 to a solution in a disinfection test, and you have a stock solution (household bleach) that
Alecsey [184]

Answer: -

0.1 ml of bleach should be added to each liter of test solution.

Explanation:-

Let the volume of bleach to be added is B ml.

Density of stock solution = 1.0 g/ml

Mass of stock solution = Volume of stock x density of stock

                                     = B ml x 1.0 g/ml

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Amount of NaOCl in this stock solution = 5% of B g

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Now each test solution must be added 5 mg/l NaOCl.

Thus each liter of test solution must have 5 mg.

Thus 0.05 B g = 5 mg

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B = \frac{0.005}{0.05}

  = 0.1

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Carbon monoxide (CO) and potassium bromide (KBr) are examples of compounds, which are made up of more than one element put together.

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