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Papessa [141]
2 years ago
12

MgCI2 how many element ?

Chemistry
1 answer:
polet [3.4K]2 years ago
7 0

Answer:

2 elements magnesium(Mg) and chlorine (Cl)

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State the difference that may be observed between the solids obtain by evaporating a solution of a solid to dryness or letting i
tresset_1 [31]

Answer:

It well melt.While theother one will dry

Explanation:

3 0
2 years ago
Tetrachloromethane, CCl4, is classified as a
Soloha48 [4]
Correct Answer: <span>compound because the atoms of the elements are combined in a fixed proportion.

Reason:
A </span><span> chemical </span>compound is a chemical substance composed of element (of same or different type) that are bonded in a fixed proportion. Depending upon the type of element, bond can be ionic or covalent. In present case, <span>tetrachloromethane i.e. CCl4 has one 'C' atom that is covalently bonded to four 'Cl' atoms. </span>
8 0
3 years ago
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____________ heat is the amount of heat required to change the temperature of 1 gram of a substance by 1°C, and it is related to
Jlenok [28]

Answer:

specific heat.

Explanation:

Definition:

The amount of heat required to raise the temperature of one gram of substance by one degree is called specific heat.

Formula:

Q = m. c. ΔT

Q = amount of heat required

m = mass of substance

c = specific heat of substance

ΔT = change in temperature

The substance with greater value of specific heat require more heat to raise the temperature while the substance with lower value will raise its temperature very quickly by absorbing smaller heat.

For example the beach sand gets hot very quickly because of lower specific heat of sand while water is colder than sand because of higher specific heat capacity.

6 0
3 years ago
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If an object what is 30 kg of mass is moving at 10 m/s to the right how much kinetic energy does it have
ki77a [65]

Explanation:

m=30

v=10

K.E=1/2mv^2

=1/2×30×10^2

=1/2×30×100

=1500 joule

6 0
2 years ago
I really need help solving this question
olchik [2.2K]
The answer to this would be helium
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3 years ago
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