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2 years ago

What is all matter made up of? A. carbon B. atoms C. metal D. cells

Chemistry

2 answers:

lubasha [3.4K]2 years ago

5 0

B. atoms...............

Andrew [12]2 years ago

5 0

B, atoms.
All matter is made up of atoms. A case can be made about photons, but not today please ,:D

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The diagram shows heat energy being transferred as hot water rises to the top of the pot and cool water sinks to the bottom.

Orlov [11]

I think it would be insulation

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2 years ago

The pencil is material or mixture ?please help

disa [49]

Answer:

mixture

Explanation:

6 0

2 years ago

Chose the mathematical formula expressing work.

Gelneren [198K]

W = AB x F x Cos < AB, F
or just W= AB x F for short

7 0

2 years ago

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. What is the weight/

lara31 [8.8K]

Answer:

A solution is made by dissolving 4.87 g of potassium nitrate in water to a final volume of 86.4 mL solution. The weight/weight % or percent by mass of the solute is :

2.67%

Explanation:

Note : Look at the density of potassium nitrate in water if given in the question.

You are calculating weight /Volume not weight/weight % or percent by mass of the solute

Here the weight/weight % or percent by mass of the solute is asked : So first convert the VOLUME OF SOLUTION into MASS

Density of potassium nitrate in water KNO3 = 2.11 g/mL

$density=\frac{mass}{volume}$

Density = 2.11 g/mL

Volume of solution = 86.4 mL

$2.11=\frac{mass}{86.4}$

$mass = 2.11\times 86.4$

$mass=182.3grams$

Mass of Solute = 4.87 g

Mass of Solution = 183.2 g

w/w% of the solute =

$= \frac{mass\ of\ solute}{mass\ of\ solution}\times 100$

$=\frac{4.87}{183.2}\times 100$

w/w%=2.67%

8 0

3 years ago

Where would you have the least weight?

Vikki [24]

In a place with no gravity

Explanation:

Weight is a force exerted by a body in the presence of gravity.

Weight = mass x gravity

Without gravity, there is no force of weight. The more the gravity, the more the weight of a body.

A body will experience weightlessness in a place without no gravity.

Therefore, one will experience the least weight in a place without the pull of gravity.

Learn more:

weight and mass brainly.com/question/5956881

#learnwithBrainly

8 0

3 years ago