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kompoz [17]
3 years ago
13

Please help me I need these answers

Chemistry
1 answer:
Cerrena [4.2K]3 years ago
8 0

1 is true

2 is d 7

3 is

            1             e

            2             b

            3             d

            4             a

            5             c

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Which of the following terms refers to the number of moles of solute per liter of solution?
Anika [276]
Molarity
Molarity is a unit used to express the concentration of a substance, and it is defined as the number of moles of solute per decimeter cubed (liter) of solvent.
5 0
3 years ago
A 50 kg cart has 324 kg•m/s of<br> momentum. How fast is the cart going?
PilotLPTM [1.2K]

Answer: 6.48m/s

Explanation:

From the question given, we obtained the following:

M = 50 kg

Velocity =?

Momentum = 324 kg•m/s

Momentum = Mass x Velocity

Velocity = momentum /Mass

Velocity = 324 / 50

Velocity = 6.48m/s

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3 years ago
According to cell theory, how are bubble algae, or sea pearls, made?
Nat2105 [25]

Answer: Bubble algae are caused by lighting, nutrients and bubble algae spores. The spores were probably on the live rock. The lighting is a side effect of trying to keep photosynthetic corals.

Explanation:

8 0
2 years ago
What is the solution to the problem expressed to the correct number of significant figures 102900/12 +170•1.27
Morgarella [4.7K]

The solution to the problem (102 900 ÷ 12) + (170 × 1.27) = 8800.

<u>Explanation</u>:

Step 1.

Evaluate the expressions inside the parentheses (PEMDAS)

102 900 ÷ 12 = 8575

170 × 1.27 = 215.9

In multiplication and division problems, your answer can have no more significant figures than the number with the fewest significant figures.

Thus, the underlined digits are not significant, but we keep them in our calculator to avoid roundoff error.

Step 2.

Do the addition (PEMDAS).

8575 + 215.9 = 8790.9

Everything that you add to an insignificant digit gives an insignificant digit as an answer.

Thus, the underlined digits are not significant.

We must drop them and round up the answer to 8800.

4 0
3 years ago
Read 2 more answers
Recall all the models you described in task 1. Think about the results each model would predict for Thomson’s experiment. Which
svetlana [45]

<u>Answer:</u>

The very early discovery of particles that were subatomic was proposed by Dalton, which was then negated by the postulates suggested by Thomson that proved Dalton's theory.

<u>Explanation:</u>

The structural arrangement of atoms were approved by Thomson and Rutherford using the technique of air condition in x-ray showing the arrangement of protons and neutrons within Centre.

A nucleus and the negative particles that we called electrons moving around which were also shown to be much lighter than the particles present in the centre.

7 0
3 years ago
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