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Dahasolnce [82]
3 years ago
14

Which of the following is a characteristic of all chemical changes?A. A different state of matter is produced. B. Some mass is c

onverted to energy. C.Some form of light is given off. D. A new material is formed
Chemistry
1 answer:
blagie [28]3 years ago
8 0
Letter A is the characteristic of all chemical change
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What is the relationship between the temperature of an object and the motion of its particles??
ivann1987 [24]
They are directly proportional to each other, in other words, when temperature of an object increases, the motion of it's particles also increases

Hope this helps!
7 0
4 years ago
Under normal conditions, describe how increasing the temperatures effects the solubility of a typical salt
AnnZ [28]
The higher the temperature the higher the solubility
4 0
3 years ago
Osmotic pressure Π is given by the relation:Π = iMRTwhere i is the van’t Hoff factor, M is the concentration of solute, R is the
lions [1.4K]

<u>Answer:</u> The concentration of solute is 0.503 mol/L

<u>Explanation:</u>

To calculate the concentration of solute, we use the equation for osmotic pressure, which is:

\pi=icRT

where,

\pi = osmotic pressure of the solution = 24 atm

i = Van't hoff factor = 2 (for NaCl)

c = concentration of solute = ?

R = Gas constant = 0.08\text{ L atm }mol^{-1}K^{-1}

T = temperature of the solution = 25^oC=[273+25]=298K

Putting values in above equation, we get:

24atm=2\times c\times 0.08\text{ L.atm }mol^{-1}K^{-1}\times 298K\\\\c=0.503mol/L

Hence, the concentration of solute is 0.503 mol/L

5 0
3 years ago
A homogeneous mixture is also called _______________. a solution. an element. a pure substance. a heterogeneous mixture. a compo
inessss [21]
A solution is right answer.
6 0
4 years ago
Most of the world’s energy comes from what three sources?
Simora [160]

Answers:

Most of the world’s energy comes from what three sources?

Oil, coal, and gas.

These energy sources are called <u>fossil</u> fuels and they are <u>non-renewable</u> resources.

Fuel type: oil

How it's formed: from the remains of ancient marine organisms

Its uses: transportation, industrial power, heating and lighting, lubricants, petrochemical industry, and use of by-products

Fule type: coal

How it's formed: when dead plant matter decays into peat and is converted into coal by the heat and pressure of deep burial

Its uses: electricity generation, metal production, cement production, chemical production, gasification, and other industrial uses

Fuel type: gas

How it's formed: decomposed organic matter mixed with mud, silt, and sand on the seafloor

Its uses: heating & cooling buildings, cooking foods, fueling vehicles, and electricity generation

5 0
3 years ago
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