Which is not an example of mechanical energy used in power plants? *
wind
water
O burning fossil fuels
O gravity

Answer:

This involves negatively charged particles (electrons) jumping to positively charged objects. When you rub the balloons against the fabric they become negatively charged. They take some of the electrons from the fabric and leave them positively charged.

Explanation:

Negative charges attract to positive charges. If a balloon is not rubbed with the wool cloth, it has an equal amount of negative to positive charges, so it will attract to a rubbed balloon. When both balloons are rubbed with the wool cloth, the both receive negative charges, so they will repel each other.

Answer:

0.02 M

Explanation:

Molarity = moles/volume (L)

125 mL =0.125L

M = 2.5/0.125 = 0.02 M

Explanation:

mole = mass/molar mass

molar mass of KHCO3 = K + H + C + O3

39 + 1 + 12 + 3(16)

= 100g/mol

mass = 75.56

mole = 75.56/100

= 0.7556mol

Answer:

Beautiful, scary, a different experience, full of imaginations.

Answer:

Group 5

Explanation:

Using method of elimination:

A. Group 1

Also known as the Alkali metals group. It contains metals such as lithium and sodium. This option is incorrect.

B. Group 2

Also known as the Alkali Earth metals group. It contains metals such as Magnesium and calcium. This option is incorrect.

C. Group 3

It contains metals such as Aluminium and scandium. This option is incorrect.

D. Group 5

This is the correct option. The elements in these group are non metals. Examples include Nitrogen.

Answer:

It is the bottom left one

Explanation:

Just did it in OW

Answer:

See explanation

Explanation:

The size of the hydration enthalpy of a system depends on the attraction between the ions and the water molecules. Stronger attractions exist between water and smaller ions. The smaller the ion, the higher the hydration enthalpy is.

In the first pair, Na+ is smaller than Cs+ hence Na+ has a larger change in hydration enthalpy.

In the second pair, Sr2+ is smaller than Rb+ hence Sr2+ has a larger change in hydration enthalpy.

In the third pair, Na+ is smaller than Cl- hence Na+ has a larger change in hydration energy.

F- is smaller than O2- hence F- has a larger change in hydration energy.

OH- is smaller than the SH- hence the OH- has a larger change in hydration energy.

Answer:

the combustion of fossil fuels, such as coal, oil, and natural gas, to produce electricity.

Answer:

Hello I saw you guys were having trouble please put me as the brainiest

Explanation:

1. Golgi Apparatus

2. Nucleus  

3. Endoplasmic Reticulum  

4. Mitochondrion  

5. Ribosome

6. Lysosome  

Answer:

o

Explanation:

Answer:

Each orbit has a specific energy level.

Explanation:

Bohr model

Answer:

soluteswws

Explanation:

Answer:

2.59g

Explanation:

Using Avagadro's law equation as follows:

V1/n1 = V2/n2

Where;

V1 = initial volume (litres)

V2 = final volume (litres)

n1 = first amount of gas in grams

n2 = second amount of gas in grams

According to the information provided in this question, v1 = 93.2L, v2 = 10.4L, n1 = 23.2 g, n2 = ?

Using V1/n1 = V2/n2

93.2/23.2 = 10.4/n2

Cross multiply

93.2 × n2 = 23.2 × 10.4

93.2n2 = 241.28

n2 = 241.28/93.2

n2 = 2.588

n2 = 2.59g

The mass of the gas is 2.59g that occupies a volume of 10.4 L under the same conditions.

V₁/n₁ = V₂/n₂

Where

V₁ = initial volume (litres)

V₂ = final volume (litres)

n₁ = first amount of gas in grams

n₂ = second amount of gas in grams

Given:

V₁ = 93.2L,

V₂ = 10.4L,

n₁ = 23.2 g,

To find:

n₂ = ?

On substituting the values:

93.2/23.2 = 10.4/n₂

93.2 * n₂ = 23.2 * 10.4

93.2* n₂ = 241.28

n₂ = 241.28/93.2

n₂ = 2.588

n₂ = 2.59g

Thus, the mass of the gas is 2.59g.

Find more information about Avogadro law here:

brainly.com/question/3491421

Answer

find out the number of moles and use the molar ratio (numbers in front of formulas (in this case they are all 1) to determine how many moles of each product you are going to get theoretically

n=m/M is the equation to use to get moles here

30.8 gm/32.04 g/mol=0.9612 moles of the methanol and also of the formaldehyde so

0.9612 moles of the formaldehyde x molar mass (M) 30.73 g/mol= 29.54 gm which is the theoretical yield you already have the actual yield of 24.7 gm

then divide the actual by the theoretical to get the % yield which is 83.6%

Explanation:

Answer:

b chemical - thermal and mechanical

Explanation:

energy stored in food in is chemical, so it would only make sense of b) was the answer

Answer:

True

animals can only reproduce sexually

Explanation:

Answer:

It's true, I said true the other time but someone already answered so that's why i couldn't answer right now

Explanation:

Answer:

i think it is A

Explanation:

Answer:

Explanation:

A. Most definitly Temperature!

Given values are:

As we know the relation,

→ [tex]Fs = K\times x[/tex]

or,

→   [tex]x = \frac{Fs}{k}[/tex]

By putting the values, we get

        [tex]= \frac{8.7}{190}[/tex]

        [tex]= 4.6\times 10^{-2} \ m[/tex]

Thus the response above is right.

Learn more about spring constant here:

https://brainly.com/question/15404289

Answer:

false

Explanation:

Difference in neutrons in a molecule means that molecules have different masses. They will always have different energies

another example: water has less energy as a liquid than as a gas

Explanation:

Answer:

3.33M

Explanation:

M1V1=M2V2

M1 = 10M

V1=2L

V2=6L

M2 = M1V1/V2 = 10x 2/6 = 3.33 M

Answer:

a. [tex]r_{N_2O_5}=-0.075M/min[/tex]

b. [tex]r_{N_2O_4}=0.075M/min[/tex]

Explanation:

Hello.

In this case, according to the balanced chemical reaction, we can write the law of rate proportions:

[tex]\frac{r_{N_2O_5}}{-2} =\frac{r_{N_2O_4}}{2} =\frac{r_{O_2}}{1}[/tex]

Thus, we proceed as follows:

a. Since the rate of oxygen production is 0.15 M/min, we can make the following setup:

[tex]\frac{r_{N_2O_5}}{-2} =\frac{r_{O_2}}{1}\\\\r_{N_2O_5}=\frac{r_{O_2}}{-2} =\frac{0.15M/min}{-2}\\\\ r_{N_2O_5}=-0.075M/min[/tex]

b. Since the rate of oxygen production is 0.15 M/min, we can make the following setup:

[tex]\frac{r_{N_2O_4}}{2} =\frac{r_{O_2}}{1}\\\\r_{N_2O_4}=\frac{r_{O_2}}{2} =\frac{0.15M/min}{2}\\\\ r_{N_2O_4}=0.075M/min[/tex]

Best regards!

Answer:

6.2

Explanation:

Answer:

In the world? I would say no, but at the same time there are a lot of variables to consider in this. But I'd say no. Just my opinion.

Explanation

Answer:

False the amount of water on earth has decreased over the years

Explanation:

Answer:

2.3 X 10^24 atoms CO2

Explanation:

Answer:

2.30 x10²⁴ molecules CO2

Explanation:

Convert mass of CO2 to moles

Convert moles of CO2 to molecules using Avogadro's number.

168.2 g CO2 x 1 mole CO2 / 44 g CO2 x 6.022 x10²³ molecules CO2 / 1 mole CO2

= 2.30 x10²⁴ molecules CO2

Answer:

freezing

Explanation:

When a solid reaches the temperature of its melting point, it can become a liquid. For water, the temperature needs to be a little over zero degrees Celsius (0oC) for you to melt. ... The reverse of the melting process is called freezing. Liquid water freezes and becomes solid ice when the molecules lose energy.

hope it becomes helpful to you ☺️☺️

good luck

Answer:

false

Explanation:

As shown in the picture, the chemical formula for glucose is C6H12O6. This means that there are 6 carbons, 12 hydrogens and 6 oxygens in one molecule of glucose.

Your Answer: 12

Answer:

I think that would be true. The faster the wind, the longer it blows, or the farther it can blow uninterrupted, the bigger the waves. Therefore, a wave's size depends on wind speed, wind duration, and the area over which the wind is blowing

Answer: True.

Explanation: Yes, waves get energy from the wind through friction, so you see those waves get bigger each time. The longer the winds blows, the more friction, and energy it's getting, meaning better, and deadly waves. The wind can sometimes cause tsunamis if the its blowing too hard.