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Ksivusya [100]
3 years ago
6

During an investigation a scientist heated 27 g of mercuric oxide till it decomposed to leave a dry product. The total mass of t

he product formed was 25 g. Does the law of conservation of mass hold true in this case?
Chemistry
2 answers:
Nina [5.8K]3 years ago
7 0

Answer:

<h2>Yes.</h2>

Explanation:

The law of conservation of mass holds true, because the mass missing is in gas form. The fact that matter can change, doesn't mean they violate this law of conservation.

<h2>So, this law is always happening.</h2>
jekas [21]3 years ago
3 0
The law of conservation holds true always so there the last two grams has be lost as a gas probably
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Answer:

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Explanation:

Empirical formula of ionic compound formed by two ions A^{x+} and B^{y-} is A_{y}B_{x} (for x\neq y) of AB (for x = y)

The above empirical formula is in accordance with charge neutrality principle

Here each cation (Fe^{3+} and Fe^{2+}) can form two ionic compounds by combining with two given anions (SO_{4}^{2-} and CH_{3}CO^{2-}).

So the four ionic compounds are: FeSO_{4},FeCH_{3}CO,Fe_{2}(SO_{4})_{3},Fe_{2}(CH_{3}CO)_{3}

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3 years ago
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Answer:

\boxed {\boxed {\sf 2.8 \ m }}

Explanation:

The formula for molality is:

m=\frac{moles \ of \ solute}{kg \ of \ solvent}

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moles= 0.210 \ mol \\kilograms = 0.075 \ kg

Substitute the values into the formula.

m= \frac{ 0.210 \ mol }{0.075 \ kg}

Divide.

m= 2.8 \ mol/kg= 2.8 \ m

The molality is <u>2.8 moles per kilogram</u>

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