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Anna35 [415]
2 years ago
12

Which types of changes must follow the law of conservation of mass?

Chemistry
1 answer:
Elis [28]2 years ago
6 0

Answer: both

Explanation:

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A sample of chromium oxide is 76.5hromium by weight. what is the simplest formula of the oxide?
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CrO and Cr₂O₃ make up the simplest chromium oxide formula.

What name does Cr₂O₃ use?

  • Chromium oxide (Cr₂O₃)sometimes referred to as chromium sesquioxide or chromic oxide, is a compound in which chromium is oxidized to a +3 state. Sodium dichromate is calcined with either carbon or sulfur to produce it.
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What best describes the degree to which a material can transmit Heat A:melting point B:boiling point C: thermal conductivity D:
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A 100-w light bulb is about 16% efficient. how many joules of heat energy are siddipated by the bulb each second
pickupchik [31]

Answer:

84 Joules are wasted per second.

Explanation:

An efficiency of 16% means 84% is wasted as heat energy.  

Therefore;

For a 100W bulb;

Heat wasted = 84/100 × 100 W

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84 W or 84 joules are wasted as heat per second

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Which relationship or statement best describes delta s for the following reaction:
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Answer:

b) Delta S < 0

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The change in the entropy (ΔS) is related to the change in the number of gaseous moles of the reaction: Δn(g) = n(g, products) - n(g, reactants).

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Let's consider the following equation.

2 H₂S(g) + 3 O₂(g) → 2 H₂O(g)

Δn(g) = 2 - 5 = - 3. Since Δn(g) < 0, the entropy decreases and ΔS < 0.

4 0
2 years ago
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