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sveta [45]
4 years ago
8

Why does hot water evaporate on ice

Chemistry
1 answer:
d1i1m1o1n [39]4 years ago
5 0

Explanation -

<em>First: Ice will not evaporate in boiling water, it will melt. The input of energy is required to overcome the attractive forces between water molecules at the boiling point). This is in excess of the heat energy needed to raise water tothe temperature of the boiling point.</em>

<u><em>Please mark brainliest...</em></u>

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A crime lab received a 235-gram sample. The sample had a molecular mass of 128.1 grams and the empirical formula is CH2O. How ma
kvv77 [185]

Explanation:

Given parameters:

Mass of sample = 235g

Molecular mass of sample = 128.1g

Empirical formula = CH₂O

Unknown:

Mass of each element in the sample = ?

Solution:

To solve this problem, we must know that the empirical formula of any compound is the simplest ratio of the atoms it contains. This is not the true formula of the compound.

      Molecular formula = (Empirical formula)ₙ

Let us find the molecular mass of the sample;

      CH₂O = 12 + 2(1) + 16 = 30g

   

      128.1  = (30)n

          n = 4

The molecular formula of the compound is;    (CH₂O)₄  = C₄H₈O₄

Now to find the grams of each element in the sample;

Express the molecular mass of each element and that of the compound as a fraction and multiply with the given mass;

    For C;

              \frac{4 x 12}{128.1}   x   235\\  = 88.06g

          H; \frac{8 x 1}{128.1}  x  235  = 14.68g

          O: \frac{4 x 16}{128.1} x 235 = 117.41g

learn more:

Mass composition brainly.com/question/3018544

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7 0
3 years ago
Consider the following endothermic reaction:
Leya [2.2K]

Answer:

The amount of C2H4I2 produced is maximized if

-Adding C2H4 to the reaction mixture

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8 0
2 years ago
Explain how to label a compound as a Bronstead-Lowry acid or base .
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Explanation:

According to the Bronsted-Lowry conjugate acid-base theory:

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A base is defined as a substance which accepts protons and thus forming conjugate acid.

For example:

HCl(aq)+NH_3(aq)\rightarrow Cl^-(aq)+NH_4^{+}(aq)

Here, HCl is loosing a proton, thus it is considered as an acid and after losing a proton, it forms Cl^- which is a conjugate base.

And, NH_3 is gaining a proton, thus it is considered as a base and after gaining a proton, it forms NH_4^{+} which is a conjugate acid.

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4 years ago
Look carefully at the animation. The moving items represents electrons.
blondinia [14]
Electrons attract objects and pull toward
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Which one is an example of continuous variation: height, eye colour and hair colour
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Answer:

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Explanation:

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