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Nataly_w [17]
2 years ago
12

Why is it important to make measurements using a standard?

Chemistry
1 answer:
ohaa [14]2 years ago
7 0

A standard unit of measurement is a quantifiable language that helps everyone understand the association of the object with the measurement. It is expressed in inches, feet, and pounds, in the United States, and centimeters, meters, and kilograms in the metric system.

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What would happen if Phosphorus disappeared?
ololo11 [35]
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3 0
3 years ago
Determine the spec gravity of 500 mL alcohol if the density is 0.79g/ml
slava [35]

Answer:

S.G = 0.79.

Explanation:

Hello there!

In this case, according to the given information in the problem, it turns out possible for us to calculate the specific gravity of this alcohol by simply dividing its density, 0.79 g/mL by that of the water, 1 g/mL just as a reference for us to work with:

S.G=\frac{\rho _{alc}}{\rho _w}

Thus, we plug in the densities to obtain:

S.G=\frac{0.79g/mL}{1g/mL}\\\\S.G=0.79

Which is dimensionless as g/mL is cancelled out due to its presence on both top and bottom of the previous formula.

Regards!

8 0
3 years ago
Which of the following is a nonmetallic mineral resource?. A. wood . B. iron . C. coal . D. aggregate
sesenic [268]

Answer: The correct option is D.

Explanation: Nonmetallic minerals are the chemical elements from which no new product can be formed when they are melted. For Example: Sand, marble etc..

For the given options:

Option A: Wood is a type of cellulose and is not considered as a nonmetallic mineral resource.

Option B: Iron is an element because it is the smallest substance which cannot be broken down. It is not considered as a nonmetallic mineral resource.

Option C: Coal is a mixture of carbon compounds. This is very close to mineral but is an organic mineral because it contains carbon atom. Hence, it is not considered as a nonmetallic mineral resource.

Option D: Aggregate is  formed by the collection of particles forming a whole mass. This is a non-metallic resource as it cannot form any new product.

Hence, the correct option is D.

8 0
3 years ago
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horrorfan [7]
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3 0
3 years ago
The electrolyte magnesium chloride (MgCl2) will break up into how many individual particles in water (what is the i value)?
Masja [62]

Answer:

Solid magnesium chloride is a non-conductor of electricity because the ions aren't free to move. However, it undergoes electrolysis when the ions become free on melting. Magnesium chloride dissolves in water to give a faintly acidic solution (pH = or 6).

3 0
3 years ago
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