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3 years ago

PLEASE HELP FAST!!! Which is a characteristic of colloids?

Chemistry

2 answers:

Kazeer [188]3 years ago

8 0

Answer:

the answer is D. Are made up of at least two

Explanation:

took the test on edge

Morgarella [4.7K]3 years ago

3 0

D because the 2 substances are made up using colloids

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A reaction generates hydrogen gas (H) as a product. The re-

Amiraneli [1.4K]

Answer: The average rate of the reaction is $7.82\times 10^{-3}M/min$

Explanation:

To calculate the molarity of hydrogen gas generated, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}}{\text{Volume of solution (in L)}}$

Moles of hydrogen gas = $3.91\times 10^{-2}mol$

Volume of solution = 250 mL = 0.250 L (Conversion factor: 1 L = 1000 mL)

Putting values in above equation, we get:

$\text{Molarity of }H_2=\frac{3.91\times 10^{-2}mol}{0.250L}=0.1564M$

Average rate of the reaction is defined as the ratio of concentration of hydrogen generated to the time taken.

To calculate the average rate of the reaction, we use the equation:

$\text{Average rate of the reaction}=\frac{\text{Concentration of hydrogen generated}}{\text{Time taken}}$

We are given:

Concentration of hydrogen generated = 0.1564 M

Time taken = 20.0 minutes

Putting values in above equation, we get:

$\text{Average rate of the reaction}=\frac{0.1564M}{20.0min}\\\\\text{Average rate of the reaction}=7.82\times 10^{-3}M/min$

Hence, the average rate of the reaction is $7.82\times 10^{-3}M/min$

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3 years ago

. How many total atoms are in H2O 12 3 10 4

MaRussiya [10]

The answer is 4......

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3 years ago

List the number of significant figures for the following numbers:

Dennis_Churaev [7]

Answer:

a) 2

b) 1

c( 1

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3 years ago

A breakfast of cereal, orange juice, and milk might contain 230 nutritional Calories. How much is this in Joules?

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Answer:

Explanation:

962,320 J

230 nutritional Calories in Joules is 962,320 J

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3 years ago

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