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2 years ago

Pls help me with chem equilibrium part 2!!!! Will mark brainliest

Chemistry

1 answer:

laila [671]2 years ago

3 0

Forward reaction equals the rate of the backward reaction

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By weight atmospheric air is approximately 23.15% oxygen and 76.85% nitrogen. What is the partial pressure of oxygen in the air

inna [77]

Answer:

Partial pressure of oxygen = 23.38 kpa (Approx)

Explanation:

Given:

Amount of oxygen = 23.15%

Amount of nitrogen = 76.85%

Pressure (missing) = 101 kpa

Find:

Partial pressure of oxygen

Computation:

Partial pressure of oxygen = [Amount of oxygen x Pressure]/100

Partial pressure of oxygen = [23.15% x 101]/100

Partial pressure of oxygen = 23.38 kpa (Approx)

5 0

2 years ago

Select all that apply. Which of the following statements are true? Significant figures are an indicator of the certainty in meas

Kitty [74]

Significant figures are an indicator of the certainty in measurements

Significant figures communicate the level of precision in measurements

3 0

2 years ago

Read 2 more answers

A solution of NaCl ( aq ) is added slowly to a solution of lead nitrate, Pb ( NO 3 ) 2 ( aq ) , until no further precipitation o

statuscvo [17]

Answer : The molarity of $Pb(NO_3)_2$ solution is, 0.352 M

Explanation :

First we have to calculate the moles of $PbCl_2$

$\text{Moles of }PbCl_2=\frac{\text{Given mass }PbCl_2}{\text{Molar mass }PbCl_2}$

Molar mass of $PbCl_2$ = 278.1 g/mol

$\text{Moles of }PbCl_2=\frac{19.58g}{278.1g/mol}=0.07041mol$

Now we have to calculate the moles of $CaCl_2$

The balanced chemical equation is:

$Pb(NO_3)_2(aq)+2NaCl(aq)\rightarrow PbCl_2(s)+2NaNO_3(aq)$

From the balanced reaction we conclude that

As, 1 mole of $PbCl_2$ produced from 1 mole of $Pb(NO_3)_2$

So, 0.07041 mole of $PbCl_2$ produced from 0.07041 mole of $Pb(NO_3)_2$

Now we have to calculate the molarity of $Pb(NO_3)_2$

$\text{Molarity of }Pb(NO_3)_2=\frac{\text{Moles of }Pb(NO_3)_2}{\text{Volume of solution in (L)}}$

$\text{Molarity of }Pb(NO_3)_2=\frac{0.07041mol}{0.200L}=0.352M$

Therefore, the molarity of $Pb(NO_3)_2$ solution is, 0.352 M

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2 years ago

How many molecules are there in 24 grams of Fe? <br><br> (Please explain how you got the answer)

Nataly [62]

1 Answer. SCooke · Stefan V. 1.2×1023 molecules. Hope this helps

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2 years ago

The scientific method is sometimes seen as more of a cycle than a linear process. Which statement gives a major

irakobra [83]

Answer:

Explanation:

When a conclusions is shared it gives room for other scientist with other ideas or different perspective to raise up new questions

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2 years ago