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Valentin [98]
3 years ago
10

Calculate the pOH of a solution that is 3.25x10^-10 M of Potassium hydroxide (KOH).

Chemistry
1 answer:
IgorLugansk [536]3 years ago
7 0

Answer:

poH= 9.48

Explanation:

pOH= -log(concentration of a Strong Base)

since KOH is a strong base we simply

-log(3.25e-10)= 9.48

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If the heat of fusion for water is 334 j/g, how many Jules are needed to melt 45.0 g of ice at 0.0°c?
finlep [7]

Given parameters:

Heat of fusion of water  = 334j/g

Mass of ice  = 45g

Temperature of ice =  0.0°c

Unknown:

Amount of heat needed to melt = ?

Solution:

This is simply a phase change and a latent heat is required in this process.

  To solve this problem; use the mathematical expression below;

             H  = mL

where m is the mass

            L is the heat of fusion of water;

              H  = 45 x 334  = 15030J

7 0
3 years ago
0.056 g/s = ? g/min
Dvinal [7]
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3 years ago
The smaller the particle size, the the surface area. Therefore, particle size is to surface area.
levacccp [35]

Answer:

Greater. Inversely proportional

Explanation:

3 0
3 years ago
Calculate the volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.
gtnhenbr [62]

535.8 L volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.

<h3>What is an ideal gas equation?</h3>

The ideal gas law (PV = nRT) relates the macroscopic properties of ideal gases. An ideal gas is a gas in which the particles (a) do not attract or repel one another and (b) take up no space (have no volume).

Given:

C(s) + O_2(g) ⇒CO_2(g)

1 mole of CO_2(g) is formed from 1 mole of charcoal, that means 1 mole of CO_2(g) is formed from 12 g of charcoal.

1 lbs = 453.592 grams

6.75 lbs = 6.75 x 453.592 =3061.746g

So, CO_2(g) formed from 3061.746g of charcoal is:

=\frac{1}{12} x 3061.746g

=255.14 mol.

Now, at STP, the volume of 1 mol of gas =22.4 L

Volume of 255.14 mol of CO_2(g) = 255.14 x 22.4 L

Volume of 255.14 mol of CO_2(g) = 535.8 L

Hence, 535.8 L volume(in L), at STP, of carbon dioxide produced by the complete combustion of 6.75 lbs of charcoal.

Learn more about the ideal gas here:

brainly.com/question/27691721

#SPJ1

3 0
2 years ago
NEED HELP ASAP
Fantom [35]

Answer:

D. potential

Explanation:

D. potential

5 0
2 years ago
Read 2 more answers
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