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cluponka [151]
3 years ago
14

I need help ASAP PLZ!!!! I’m having trouble with a question, “How does the particle theory of matter help you explain why cold w

ater is denser than hot water?” Help me please!!!!
Chemistry
1 answer:
Kamila [148]3 years ago
8 0
Cooling a substance causes molecules to slow down and get slightly closer together, occupying a smaller volume that results in an increase in density. ... Cold water is more dense and will sink in room-temperature water.
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What is the molarity of a nitric acid solution if 43.13 mL 0.1000 M KOH solution is needed to neutralize 30.00 mL of the acid so
Leno4ka [110]

Answer:

0.144M

Explanation:

First, let us write a balanced equation for the reaction. This is illustrated below:

HNO3 + KOH —> KNO3 + H20

From the equation,

nA = 1

nB = 1

From the question given, we obtained the following:

Ma =?

Va = 30.00mL

Mb = 0.1000M

Vb = 43.13 mL

MaVa / MbVb = nA/nB

Ma x 30 / 0.1 x 43.13 = 1

Cross multiply to express in linear form

Ma x 30 = 0.1 x 43.13

Divide both side by 30

Ma = (0.1 x 43.13) /30 = 0.144M

The molarity of the nitric acid is 0.144M

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4 0
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What volume will 3.0 moles of O2 gas occupy at S.T.P?
REY [17]

Answer:

3 moles of oxygen at STP will occupy a volume of 3×22. 4=67. 2 L.

Explanation:

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2 years ago
What is acid? 2.define an atom?
Wittaler [7]
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Which molecule is most polar? <br> A) CH3CHO<br> B)CO2<br> C)CH3Cl<br> D)C2H6<br> E)NONE
Anit [1.1K]

the answer is none

Explanation:

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