Ask question

Ask question

All categories

3 years ago

8

If mechanical energy = kinetic energy + potential energy then as the potential energy decrease what happens to the kinetic energ

y?

1 answer:

Arisa [49]3 years ago

4 0

Explanation:

i found this hope it helps

You might be interested in

Name of compound AgC2H3O2

BaLLatris [955]

Answer:

AgC2H3O2 is: Silver acetate

7 0

3 years ago

On a graph, which type of line shows a direct proportion?

leonid [27]

Direct Proportion and The Straight Line Graph.Straight<span> line graphs that go through the origin, like the one immediately below, show that the quantities on the graph are in direct proportion.
thanks
cbuck763

</span>

8 0

3 years ago

A 1.50 L buffer solution is 0.250 M in HF and 0.250 M in NaF. Calculate the pH of the solution after the addition of 0.100 moles

alexgriva [62]

Answer : The pH of the solution is, 3.41

Explanation :

First we have to calculate the moles of $HF$ .

$\text{Moles of HF}=\text{Concentration of HF}\times \text{Volume of solution}$

$\text{Moles of HF}=0.250M\times 1.50L=0.375mol$

Now we have to calculate the value of $pK_a$ .

The expression used for the calculation of $pK_a$ is,

$pK_a=-\log (K_a)$

Now put the value of $K_a$ in this expression, we get:

$pK_a=-\log (6.8\times 10^{-4})$

$pK_a=4-\log (6.8)$

$pK_a=3.17$

The reaction will be:

$HF+OH^-\rightleftharpoons F^-+H_2O$

Initial moles 0.375 0.100 0.375

At eqm. (0.375-0.100) 0 (0.375+0.100)

= 0.275 = 0.475

Now we have to calculate the pH of solution.

Using Henderson Hesselbach equation :

$pH=pK_a+\log \frac{[Salt]}{[Acid]}$

$pH=pK_a+\log \frac{[F^-]}{[HF]}$

Now put all the given values in this expression, we get:

$pH=3.17+\log [\frac{(\frac{0.475}{1.50})}{(\frac{0.275}{1.50})}]$

$pH=3.41$

Thus, the pH of the solution is, 3.41

8 0

3 years ago

What is the volume of a 6.2 M potassium chloride solution that contains 18.25 mols of solute? Show your work, please

slega [8]

Answer:

The answer to your question is Volume = 2.94 L

Explanation:

Data

Concentration = 6.2 M

Number of moles = 18.25

Volume = ?

Process

1.- Use the Molarity formula to solve this problem

Molarity = Number of moles / Volume

- Solve for volume

Volume = Number of moles / Molarity

2.- Substitution

Volume = 18.25 / 6.2

3.- Simplification

Volume = 2.94 L

3 0

3 years ago

Read 2 more answers

What is the name of the molecule below?

Arte-miy333 [17]

Answer:

The name of the molecule which is given below is 2-pentene.

Explanation:

Alkenes are the organic compounds which are composed of carbon and hydrogen atoms, in which double bond is present.

In the given diagram:

Each corner and joints shows the carbon atoms and number of carbon atoms in it is 5.

One double bond is present in the 2nd position.

So the compound is 2 pentene.

Hence, 2 pentene is the name of the compound.

5 0

2 years ago