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stira [4]
2 years ago
11

When a substance changes from one phase to another, which of the following occurs?

Chemistry
1 answer:
Shkiper50 [21]2 years ago
8 0

Answer:

B

Explanation:

The average kinetic energy of the Substance changes.

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Help me plz I don’t know what it’s mean
Pavlova-9 [17]

Answer:

1 has the highest density because it has the most amount of circles in the least amount of space- it is the most densely filled with circles; it is the most dense.

4 0
3 years ago
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Which statements are correct regarding the Law of Conservation of Matter and Energy?
Elden [556K]

Answer:

Matter or energy can change from one form to the other

Explanation:

The law of conservation of energy states that energy can neither be created nor destroyed but can only be transformed i.e. changed from one form to another. For example, mechanical energy can be changed to electrical energy.

Likewise, the law of conservation of mass/matter states that matter can not be destroyed or created but can change via physical or chemical means to conserve it. For example, matter can change from liquid state to gaseous state.

From the above two laws, it can be said that "matter or energy can change from one form to the other".

5 0
3 years ago
What mass of natural gas (ch4) must you burn to emit 272 kj of heat?
balandron [24]
CH4 + 2 O2 ---> CO2 + 2 H2O Q = 891,6 kJ / mol CH4

1 mol CH4 = 16 g

16 g ---- 891,6 kJ
x g ----- 272 kJ

x = 272 kJ × 16 g / 891,6 kJ = 4,88 g

You must burn 4,88 g of CH4.

:-) ;-)
7 0
3 years ago
#1. Which one of the following statements correctly defines active site? The active site is a site on the enzyme molecule where
deff fn [24]
Active sites in enzymes are where substrates bind. Once they bind, a catalytic reaction occurs as a complex between substrate and enzyme is formed. Enzymes are termed as biocatalysts or simply catalysts since they speed up the catalytic reaction. After the reaction, they simply revert back to their original form, after having adjusted to fit with substrate. 
7 0
3 years ago
In which model are atoms are imagined as tiny balls?
kobusy [5.1K]
Dalton's Billiard Ball Model
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3 years ago
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