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2 years ago

HELP PLEASE! I WILL GIVE YOU POINTS

Chemistry

2 answers:

scoundrel [369]2 years ago

8 0

A. An Interdependent system of plants, animals, and land

maw [93]2 years ago

7 0

I would say A is the best answer

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A 250 cm^3 solution containing 1,46 g of sodium chloride is added to an excess of silver nitrate solution. The reaction is given

faust18 [17]

Answer:

The mass of the precipitate that AgCl is 3.5803 g.

Explanation:

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

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

We are given:

Mass of solute (NaCl) = 1.46 g

Molar mass of sulfuric acid = 58.5 g/mol

Volume of solution = $250 cm^3 =250 mL$

$1 cm^3= 1 ml$

Putting values in above equation, we get:

$\text{Molarity of solution}=\frac{1.46g\times 1000}{58.5g/mol\times 250}\\\\\text{Molarity of solution}=0.09982 M$

0.09982 M is the concentration of the sodium chloride solution.

b) $NaCl (aq)+AgNO_3 (aq)\rightarrow AgCI(s)+NaNO_3(aq)$

Moles of NaCl = $\frac{1.46 g}{58.5 g/mol}=0.02495 mol$

according to reaction 1 mol of NaCl gives 1 mol of AgCl.

Then 0.02495 moles of NaCl will give:

$\frac{1}{1}\times 0.02495 mol=0.02495 mol$ of AgCl

Mass of 0.02495 moles of AgCl:

$0.02495 mol\times 143.5 g/mol=3.5803 g$

The mass of the precipitate that AgCl is 3.5803 g.

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3 years ago

14. In groups, students create dioramas to depict different ecosystems and their physical characteristics. One of the dioramas i

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The answer would be E, it shows students how the different environments appear, since you can visually see it.

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2 years ago

All cells _____.

xeze [42]

The answer is the fourth choice, or Have membrane-bound organelles. Hope this helps you!

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-Belle

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2 years ago

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MA_775_DIABLO [31]

Answer:

true

Explanation:

probably true

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2 years ago

I think its A can someone help me?

ratelena [41]

The answer is A) Scientific Law

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3 years ago

Read 2 more answers