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amm1812
4 years ago
5

Water _____.

Chemistry
2 answers:
Harman [31]4 years ago
8 0
<h3><em>Expands when it freezes. Is your answer.</em></h3>
photoshop1234 [79]4 years ago
6 0
The first one is wrong because water has a ph level of 7.5. the second one is correct because the molecules in the liquid expand until it reaches its freezing point. the third one is wrong because liquids are less dense than solids. the fourth one is wrong because water dissolves into water.
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Rasheed calculates that his chemical reaction should produce 4 moles of product, but when he does the experiment, he gets only 3
Brut [27]

Answer:

The answer to your question is 75%

Explanation:

Data

Theoretical production = 4 moles

Experimental production = 3 moles

Percent yield = ?

Formula

Percent yield = \frac{Experimental production}{Theoretical production} x 100

Substitution

Percent yield = \frac{3}{4} x 100

Result

Percent yield = 75 %

8 0
3 years ago
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What type of physical change is it when a liquid turns into a solid and a solid turns into a liquid
goblinko [34]

Answer:

Freezing and Melting (Fusion)

Explanation:

4 0
3 years ago
Which of the following is true of a heterogeneous mixture?
tia_tia [17]
A, a heterogeneous mixture is a mixture where all the particles are not made up of one uniform composition. you can distinguish the different particles
8 0
3 years ago
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What is the concentration of Htions at a pH = 11?
Lostsunrise [7]
Answer:
a) 1 x 10^-11 mol/L
b) 1 x 10^-6 mol/L
c) 1 x 10^-5 fewer H+ ions

Explanation

pH stands for Power of Hydrogen, the more acidic a substance is, the more H+ ions it has rendering the substance acidic. a pH of 1 means the concentration of H+ ions is 1 x 10^-1. A pH of 7 means the concentration of H+ ions is 1 x 10^-7 and so on.

10^-11 has 10^-5 more H+ ions than 10^-6

Hope this helps :)
5 0
3 years ago
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