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Dafna1 [17]
3 years ago
12

Which option best describes the water cycle?

Chemistry
1 answer:
Fittoniya [83]3 years ago
8 0
The answer should be option D
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Urgent 25 points!!
LekaFEV [45]

Answer:

A. Yes, Amanda find the number of moles of NaCl correctly.

B. 0.73 M.

Explanation:

<em>A. Did Amanda find the number of moles of NaCl correctly? If not, explain. </em>

  • Yes, Amanda find the number of moles of NaCl correctly.
  • The relation to find the no. of moles of NaCl is:

<em>No. of moles (n) of NaCl = mass/molar mass.</em>

mass of NaCl = 32.0 g, molar mass of NaCl = 58.45 g/mol.

∴ No. of moles (n) of NaCl = mass/molar mass = (32.0 g)/(58.45 g/mol) = (32.0 g NaCl)*(1 mol of NaCl)/(58.45 g NaCl) = 0.547 mol ≅ 0.55 mol.

<em>B. What does Amanda need to do next to calculate the molarity of the NaCl solution? Show your work for full credit.</em>

<em></em>

  • Molarity is the no. of moles of solute dissolved in a 1.0 liter of a solution.

∴ M = (no. of moles of NaCl)/(volume of solution (L)) = (0.55 mol)/(0.75 L) = 0.73 M.

5 0
4 years ago
Ava and Eddy are discussing the difference between a species being extinct and an endangered species. Ava states that extinction
12345 [234]

In biology the term extinct is used for species which are no longer alive. so here Ava is correct because a species has died out and is not longer alive.

Endangered species are those which are on the urge of being extinct, means they are in danger so the term "endangered"

Ava can also elaborate the terms by taking examples

Dinosaurs are extinct species. They are no longer alive or not found in any part of world. So they are called as extinct.

The term can be used for animal or plant species.

8 0
3 years ago
How do decomposers interact with producers and consumers in an ecosystem
fenix001 [56]
Best Answer: producers use nutrients in the soil > consumers eat the producers, obtaining the energy and nutrients that the plant took > the consumer dies and is decomposed by a decomposer (usually decomposing bacteria), which replaces the nutrients back into the soil > producers use the nutrients in the soil.

now put that into your own words; if you cant, try drawing pictures to help you :) that might help you revise too, but remember to add info underneath, otherwise you might not understand it when you come back to it later
7 0
3 years ago
If a patient\'s blood pressure is 145 over 85 mmHg, what is it in atmospheres (atm)?
yan [13]
In 1(atm) the patients blood is 760 mmHg
6 0
3 years ago
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Homologous chromosomes pair up during prophase I to form a ________________.
Ksivusya [100]
I’m pretty sure the correct answer is “tetrad”
6 0
3 years ago
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