Is this better to see than the other one

Chemistry

1 answer:

Nimfa-mama [501]2 years ago

8 0

Number 2. This is a power plant windmill. Kinetic energy from the wind is being converted to mechanical energy.

Number 3. Those are energy power plants which involve coal being burned. Chemical energy is being converted to heat energy and then into kinetic energy.

Number 3. You're welcomed to use whatever object you'd like. An example you could put is a car. Chemical energy is being converted to mechanical energy.

Hope that helps. -UF aka Nadia

You might be interested in

Question 17

Maurinko [17]

I will say this is True….?

7 0

1 year ago

Read 2 more answers

In which location would you expect to find the greatest species diversity?!

Crank

I believe the answer is Canada!

5 0

3 years ago

Two descriptions for a sub-atomic particle are listed below:

Dmitrij [34]

Can not be D or B and A is not enough so C is right.

4 0

2 years ago

Read 2 more answers

How many milliliters of a 0.285 M HCl solution are needed to neutralize 249 mL of a 0.0443 M Ba(OH)2 solution?

meriva

Answer:

$\large \boxed{\text{77.4 mL}}$

Explanation:

Ba(OH)₂ + 2HCl ⟶ BaCl₂ + H₂O

V/mL: 249

c/mol·L⁻¹: 0.0443 0.285

1. Calculate the moles of Ba(OH)₂

$\text{Moles of Ba(OH)$_{2}$} = \text{0.249 L Ba(OH)}_{2} \times \dfrac{\text{0.0443 mol Ba(OH)}_{2}}{\text{1 L Ba(OH)$_{2}$}} = \text{0.011 03 mol Ba(OH)}_{2}$

2. Calculate the moles of HCl

The molar ratio is 2 mol HCl:1 mol Ba(OH)₂

$\text{Moles of HCl} = \text{0.011 03 mol Ba(OH)}_{2} \times \dfrac{\text{2 mol HCl}}{\text{1 mol Ba(OH)}_{2}} = \text{0.022 06 mol HCl}$

3. Calculate the volume of HCl

$V_{\text{HCl}} = \text{0.022 06 mol HCl} \times \dfrac{\text{1 L HCl}}{\text{0.285 mol HCl}} = \text{0.0774 L HCl} = \textbf{77.4 mL HCl}\\\\\text{You must add $\large \boxed{\textbf{77.4 mL}}$ of HCl.}$