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Nikolay [14]
4 years ago
9

A tree trunk floating in the water Balanced Or Unbalanced

Chemistry
1 answer:
mars1129 [50]4 years ago
3 0

Answer:

Balanced

Explanation:

Please help me by marking me brainliest. I'm one away :)

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45 grams of ammonia, NH3, in 0.75 L of solution.
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4 years ago
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I hope it helps.. if it doesn’t please comment I’ll post another answer..
6 0
3 years ago
Read 2 more answers
Q = smT
Effectus [21]

Answer:

The heat required is 1262.91 joules or 1.26 kilojoules.

Explanation:

The quantity of heat (Q) required to raise the temperature of a substance depends on its Mass (M), specific heat capacity (C) and change in temperature (Φ)

Thus, Q = MCΦ

Since,

Q = ?

Mass of aluminum sample = 33.0g

C = 0.89 J/g℃

Φ = (Final temperature - Initial temperature)

= 68°C - 25°C = 43°C

Then, Q = MCΦ

Q = 33.0g x 0.89 J/g℃ x 43°C

Q = 1262.91 J

Since the heat in joules is 1262.91, obtain heat in kilojoules.

If 1000 joules = 1 kilojoules

1262.91 joules = Z

To get Z, cross multiply

Z x 1000 = 1262.91 x 1

1000Z = 1262.91

Z = 1262.91 / 1000

Z = 1.26291 kilojoules (when placed as 3 significant figures, Z is 1.26 kilojoules)

Thus, the heat required is 1262.91 joules or 1.26 kilojoules.

4 0
3 years ago
Which energy changes in the enthalpy of solution are endothermic, and which are exothermic?
snow_tiger [21]
When energy is needed in order for the reaction to happen, then that reaction is known as endotermic. When the reaction has as a result energy then it is exotermic. An example of an endotermic reaction would be photosynthesis, for an exotermic: combustion.
8 0
4 years ago
What’s the equation to solid calcium oxide reacts with hydrochloric acid to form a solution of calcium chloride and water as it’
meriva

Answer: CaO + 2HCl —> CaCl2 + H2O

Explanation:

3 0
4 years ago
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