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TiliK225 [7]
3 years ago
15

The amount of stored chemical energy is what determines the temperature of a substance.

Chemistry
2 answers:
mash [69]3 years ago
6 0

Answer:

False

Explanation:

The chemical energy in a substance is determined by the potential energy of the bonds of the products formed when it reacts.

Orlov [11]3 years ago
3 0

Answer:

False

Explanation:

Temperature is also heat energy, so chemical energy has no affect over it.

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Atoms of the same element can have different properties.<br><br> True<br> False
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I think the answer is true if so i hope it helps

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Alum is a compound used in a variety of applications including cosmetics, water purification, and as a food additive. It can be
mylen [45]

yield = 52.23 %

Explanation:

We have the following chemical reaction:

2 Al (s) + 2 KOH (aq) + 4 H₂SO₄ (aq) + 10 H₂O → 2 KAl(SO₄)₂·12 (H₂O) (s) + 3 H₂ (g)

mass of aluminium = mass of bottle with aluminium pieces - bottle mass

mass of aluminium = 10.8955 - 9.8981 = 0.9974 g

mass of alum = mass of bottle with final product - bottle mass

mass of alum = 19.0414 - 9.8981 = 9.1433 g

number of moles = mass / molecular weight

number of moles of aluminium = 0.9974 / 27 = 0.03694 moles

number of moles of alum (practical) = 9.1433 / 474 = 0.01929 moles

To calculate the theoretical quantity of alum that should be obtained from 0.03694 moles of aluminium we devise the following reasoning:

if       2 moles of aluminium produce 2 moles of alum

then 0.03694 moles of aluminium produce X moles of alum

X = (0.03694 × 2) / 2 = 0.03694 moles of alum (theoretical)

yield = (practical quantity / theoretical quantity) × 100

yield = (0.01929 /  0.03694) × 100

yield = 52.23 %

Learn more about:

reaction yield

brainly.com/question/7786567

#learnwithBrainly

5 0
3 years ago
Why does increasing concentration usually increase reaction rate?
Alex Ar [27]
The correct answer is C) There are more particle collision

With more particle collision, more reactions are created.
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What does this expression represent?
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Your answer will b C
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When explaining chemical reactions to a friend, Brianna models a reaction by taking several colors of modeling clay and making a
pickupchik [31]

Explanation: Here are the different coloured that are used to join and make one piece this method that Brianna is following is called synthesis.

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2 years ago
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