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ivanzaharov [21]
4 years ago
7

When a cup of hot chocolate cools from 90 C to 80 C, which

Chemistry
1 answer:
kirza4 [7]4 years ago
8 0

Answer: Their rate of motion is decreasing

Explanation:

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What is Charles's law?<br> State the definition of the law in words.
aev [14]

Answer:a law stating that the volume of an ideal gas at constant pressure is directly proportional to the absolute temperature

Explanation:

4 0
3 years ago
How much heat is absorbed during production of 127 g of NO by the combination of nitrogen and oxygen?
Murrr4er [49]
137 g NO) / (30.0061 g NO/mol) x (43 kcal / 2 mol NO) = 98 kcal
7 0
3 years ago
A sample of helium gas has a volume of 1.25 L and a temperature of 22 °C, under a constant pressure. What is the new volume if t
Digiron [165]

Answer:

the new volume is 1.35L

Explanation:

The computation of the new volume in the case when the temperature rises to 45 degrees is shown below:

GIven that

Volume = 1.25L

And, the temperature is 22 degrees celsius

So, T_1 = (275 + 22)k

= 297 k

Now

T_2 = (275 + 45)k

= 320 k

Now as it is a constant pressure

So, the new volume is

\frac{V_1}{T_1} = \frac{V_2}{T_2}  \\\\V_2 = \frac{V_1}{T_1}\times T_2 \\\\= \frac{1.25}{297}\times 320

= 1.35L

hence, the new volume is 1.35L

5 0
3 years ago
The formula for europium oxide is Eu203. On the basis of this information, the formula for the chlorate of europium would be exp
lina2011 [118]

Answer:

Eu(ClO3)3

Explanation:

The chlorate ion is written as follows, ClO⁻ ₃. We can see from this that the ion is univalent.

From the formula, Eu203, it is easy to see that the europium ion is trivalent.

Hence, when a compound is formed between the europium ion and chlorate ion, the compound will be written as Eu(ClO3)3.

This is so because, when ionic compounds are formed, there is an exchange of valence between the ions in the compound. This gives the final formula of the ionic substance.

4 0
3 years ago
When pineapple juice disolve in water,it forms like what kind of mixtures.​
Digiron [165]

Explanation:

Pineapple juice often shows an unstable cloud and produces a solid precipitate that is not very attractive for consumers. Cloud stabilization by pectin addition is permitted by EU and Codex standards to counteract this effect. This additive must be labeled and its content should not exceed fixed maximum standards (Website of AIJN Code of Practice). Determination of water-soluble pectins by IFU method 26 (Website of International Fruit and Vegetable Juice Association) can be used for control of this parameter. Pectin addition to pineapple juice or juice concentrate, etc. may also be detected after its isolation by 13C isotopic analysis (Hammond, 2006) as explained later.

5 0
3 years ago
Read 2 more answers
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