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3 years ago

Extra points if anyone can help me with those 2

Chemistry

2 answers:

Allisa [31]3 years ago

7 0

Answer:

Blank 1 - Microscope

Blank 2 - Cell Theory

Explanation:

pishuonlain [190]3 years ago

3 0

Answer:

microscope. and cell theory

Explanation:

with the invention of the microscope. scientists were able to create cell theory

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What is the pH of a solution in which [H 3O +] = 3.8 × 10 -8 M?

7nadin3 [17]

Answer:

<h3>The answer is 7.42 </h3>

Explanation:

The pH of a solution can be found by using the formula

$pH = - log [ { H_3O}^{+}]$

From the question we have

$pH = - log(3.8 \times {10}^{ - 8} ) \\ = 7.420216...$

We have the final answer as

Hope this helps you

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2 years ago

Which of the following is the name of the process scientists use to gain

kobusy [5.1K]

Scientific method

Explanation:

The scientific method is the name of the process scientists use to gain knowledge about the physical world.

The scientific method is a systematic approach into the study of nature. It follows the following processes:

Detailed observation
Asking of question
Formulation of hypothesis
Experimentation
Analysis and interpretation
Conclusion

learn more:

Experiment brainly.com/question/1621519

#learnwithBrainly

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3 years ago

Martin slowly pours an unknown liquid into a container that originally had some water in it. He is measuring the temperature in

Evgen [1.6K]

B. a chemical change

8 0

2 years ago

Read 2 more answers

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svet-max [94.6K]

No of protons=No of electrons=15

<h3>Mass no:-No of neutrons+No of protons </h3>

$\\ \tt\longmapsto 15+16=31$

Now

It has atomic no 15 hence its Phosphorus(P)

Electronic configuration:-

$\\ \tt\longmapsto 1s^22s^22p^63s^23p^3$ .

Valency=3

Chloride formula:-

$\\ \tt\longmapsto XCl_3$

or.

$\\ \tt\longmapsto PCl_3$

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2 years ago

Read 2 more answers

Exam number: 007170RR

AleksandrR [38]

Answer:

A open

Explanation:

I am not sure but i think it is!

5 0

3 years ago