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3 years ago

Which of these energy resources does NOT pollute when used?

Chemistry

2 answers:

igomit [66]3 years ago

6 0

The answer is D. Hydroelectric

LekaFEV [45]3 years ago

3 0

the answer is .D hope this helps have a nice day. :)

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Galina-37 [17]

Can we see the graph

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3 years ago

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Help ASAP I will mark brainliest for the correct answer !!!⚡️⚡️⚡️

Juliette [100K]

450 because 15x30 :)

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3 years ago

A chemist prepares a solution of zinc oxalate by measuring out of zinc oxalate into a volumetric flask and filling the flask to

anyanavicka [17]

<u>Answer:</u> The concentration of zinc oxalate is $1.7\times 10^{-11}M$

<u>Explanation:</u>

To calculate the molarity of solution, we use the equation:

$\text{Molarity of the solution}=\frac{\text{Moles of solute}\times 1000}{\text{Volume of solution (in mL)}}$

We are given:

Moles of zinc oxalate = $0.0075\mu mol=7.5\times 10^{-9}mol$ (Conversion factor: $1mol=10^{6}\mu mol$ )

Volume of solution = 450 mL

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{7.5\times 10^{-9}\times 1000}{450mL}\\\\\text{Molarity of solution}=1.66\times 10^{-11}M=1.7\times 10^{-11}M$

In case of multiplication and division, the number of significant digits is taken from the value which has least precise significant digits. Here, the least precise number of significant digits are 2.

Hence, the concentration of zinc oxalate is $1.7\times 10^{-11}M$

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3 years ago

What is different about the first experiment and the second experiment that Paola does?

katrin2010 [14]

Is that they aren’t Paola’s

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3 years ago

Describe connective tissue. What are functions of this tissue

tester [92]

Connective tissue is one of the four different types of tissues. It consists of cells suspended in a matrix, and consist of fibres running through it. It’s main job is to connect internal tissues. They also support and protect internal organs. Examples include cartilage, blood, lymph and adipose tissue.

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3 years ago

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