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Sergeeva-Olga [200]
3 years ago
10

True or false when matter changes it’s state it is a physical change because it is the same substance the whole time.

Chemistry
1 answer:
Blababa [14]3 years ago
5 0

Answer:

true

Explanation:

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State the difference between sugar in water and pebbles in water
Usimov [2.4K]
Sugar is made of molecules that are bonded together based on the positively and negatively charged areas.  They will slowly dissolve in water.  Pebbles are solids.  They will sit in water for a long time.  Though shale pebbles will break apart or fall apart.
6 0
2 years ago
A. 1720 kJ<br> B. 125.6 kJ<br> C. 3440 kJ<br> D. 4730 kJ
Feliz [49]

Answer:

Q = 3440Kj

Explanation:

Given data:

Mass of gold = 2kg

Latent heat of vaporization = 1720 Kj/Kg

Energy required to vaporize 2kg gold = ?

Solution:

Equation

Q= mLvap

It is given that heat required to vaporize the one kilogram gold is 1720 Kj thus, for 2 kg

by putting values,

Q= 2kg ×  1720 Kj/Kg

Q = 3440Kj

7 0
3 years ago
Which of the following could be considered a scientific statement? (2 points) ​
Andrej [43]

Answer:

The answer of the scientific STATEMENT is" Appears That Ants Live In Colonies."

7 0
2 years ago
How many hydrogen atoms Is needed for C5H8 to become saturated
tatiyna

Answer:

4 hydrogen atoms are needed to C5H8 to saturate it

Explanation: because C5H8 is an alkyne that contains a triple bond or alkene with 2 double bonds.

2 hydrogen atoms are needed to saturate one double bond and 4 hydrogen atoms are needed to fully Saturate a triple bond or two double bonds.

8 0
2 years ago
What is the<br> mass of 1.82<br> moles of<br> Lithium<br> carbonate?
frutty [35]

Answer:

244.76

Explanation:

The weight of grams by 1.82 moles of lithium carbonate would be: 134.481438 So we need to use this equation to find mass by grams m × g = ms Where m is for moles, g for grams, and ms for mass. So now we need use this equation: 1.82 × 134.481438 = ? 1.82 × 134.481438 = 244.75621716 244.75621716, rounded-up (to the nearest-tenths place) is 244.76. So now you have it! The mass of 1.82 moles of lithium carbonate is 244.76!  

7 0
3 years ago
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