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slamgirl [31]
3 years ago
8

At room temperature, all samples of liquid water must have the same

Chemistry
2 answers:
Nikolay [14]3 years ago
6 0

The answer is 2. density

At room temperature, all samples of liquid water must have the same density.

Whatever the volume of different liquid water samples, they always have same density. As density of liquid water is always same that is 1 g cm⁻³. So different liquid water can have different volume, weight and mass but their density always remains same.

laiz [17]3 years ago
4 0
Density. water's density is always 1 g/ cm^3
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gtnhenbr [62]

Answer:

-753kJ of energy are involved

Explanation:

Based on the reaction:

Fe₂O₃(s) + 2 Al(s) → Al₂O₃(s) + 2 Fe(s) ΔH°rxn = -852 kJ

<em>When 2 moles of Fe are produced, there are released -852kJ.</em>

<em />

98.7g of Fe are:

98.7g Fe × (1mol / 55.845g) = 1.767 moles of Fe

If 2 moles of Fe are producen when -852 kJ of energy are involved, 1.767 moles of Fe envolved:

1.767mol × (-852kJ / 2mol Fe) = <em>-753kJ of energy are involved</em>

6 0
3 years ago
The ___ is the short form that chemists use to identify an element
slavikrds [6]

Chemical symbols

Explanation:

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6 0
3 years ago
Why is it important for the pH of blood to remain constant
fenix001 [56]
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7 0
3 years ago
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mash [69]

Answer:

-290KJ/mol

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ΔHrxn = 4(-1279) - [6(-286) - 3110]

= -5116 -(-1716-3110)

= -5116-(-4826)

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3 years ago
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Answer:

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