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AURORKA [14]
3 years ago
5

Mass is measured against a standard by using a balance. a. True b. False

Chemistry
2 answers:
jok3333 [9.3K]3 years ago
6 0
Mass is measured against a standard by using a balance. The statement given above is a fact. Therefore the answer among the choices is letter "A" or "A. True". I hope this helps you on your assignment. 
nasty-shy [4]3 years ago
5 0

Answer:

<u><em>The answer is</em></u>: <u>a. True.</u>

<u />

Explanation:

Mass and weight are different properties,<em> which are defined in the field of physics.</em> Mass is a measure of the amount of matter that a body possesses <em>while weight is a measure of the force that is caused on the body, by the gravitational field of another. </em>

The balance is an instrument used to measure the mass of objects.

<u><em>The answer is</em></u>: <u>a. True.</u>

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Prepare 15 mg/dl working standard solution from a stock solution of 20 mg/dl. State the volume of diluent and dilution.
Anastasy [175]

Preparing 15 mg/gl working standard solution from a 20 mg/dl stock solution will require the application of the dilution principle.

Recalling the principle:

initial volume x initial molarity = final volume x final molarity

Since we were not given any volume to work with, we can as well just take an arbitrary volume to be prepared. Let's assume that the stock solution is 10 mL and we want to prepare 15 mg/gl from it:

Applying the dilution principle:

10 x 20 = final volume x 15

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This means that in order to prepare 13.33 mL, 15 mg/l working standard solution from 10 ml, 20 mg/dl stock solution, 3.33 mL of the diluent must be added to the stock solution.

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