PLEASE HELP ASAP IT URGENT!!!!!!!!

The percentage of fluorine in the given compound is 49%.

The given compound;

CaF₂

The molecular mass of the given compound is calculated as follows;

CaF₂ = (40) + (19 x 2)

        =   40  +  38  

        =  78 g/mol

The mass of fluorine in the given compound = 38 g/mol

The percentage of fluorine in the given compound is calculated as follows;

[tex]= \frac{38}{78} \times 100\%\\\\= 48.7 \%\\\\\approx 49\%[/tex]

Thus, the percentage of fluorine in the given compound is 49%.

Learn more about percentage of element in a compound here: https://brainly.com/question/21044245

Answer:

30

Explanation:

Answer:

The first one, The third one.

700-25, 600+75!

Explanation:

Answer:

The purple are molarity and the green are molality

Explanation:

I think dont kill me if thats wrong

Answer:

It means Sulfurous Acid

Explanation:

Answer:

it could destroy the nucleus

Explanation:

due too much power going into it

This means that the sodium bicarbonate in this experiment is the Excess reactant.

These are the elements or compounds which are involved in a chemical reaction and react to form the products.

The reactants were sodium bicarbonate and acetic acid with small amounts of the former being  unreacted at the bottom of the beaker means it's anm excess reactant.

Read more about Reactants here https://brainly.com/question/6421464

Answer:

When you look only at the “before” and “after” of a change, you are considering it as static change. In this perspective, you look at change as a one-dimensional shift. A situation or object was one way, and now it is different because some outside force acted on it to make it change.

Explanation:

Its the def

Answer:

When there is heat at the bottom of this air or water, the air or water molecules in contact with the heat start to move, and the molecules spread apart. The heated air or water becomes less dense. It rises up until it gets to air or water with the same density as it has, and when it gets there, it pushes the air or water that was there out of the way. At the same time, new air or water fills the space that was vacated when the heated molecules rose up. The air or water that gets pushed out of the way falls down. This sets up a circular motion. Air or water is heated at the bottom, travels to the top, cools, gets denser, falls, is heated again and the whole cycle starts again. Convection does not occur in space because there is no gravity. Ovens work by convection. The heating coils at the bottom of the oven heat the air which climbs to the top, cools slightly, and falls down again.

Explanation:

Answer:

1.33 x 10^-3 mol H2

Explanation:

? mol H2 = 8.00 x 1020^20 molecules H2 x  1 mol H2/6.02 ! 1023 molecules H2 = 1.33 x 10^-3 mol H2

Hope that helps!

8.00 x 10²⁰ molecules of H₂ present in 1.33 x 10⁻³ mole of H₂.

Mole is used to define the amount of quantity of any substance and 1 mole equals to the 6.023 × 10²³ elementary entities or atoms in it.

According to the question:

1 mole of H₂ = 6.023 × 10²³ molecules of H₂

or 1 molecules of H₂ = 1 mole of H₂ / 6.023 × 10²³ molecules of H₂

To convert 8.00 x 10²⁰ molecules into mole we calculate as follow:

x mole of H₂ = (8.00 x 10²⁰ molecules x  1 mole of H₂) / 6.023 × 10²³ molecules

x mole = 1.33 x 10⁻³ mole

Hence, 1.33 x 10⁻³ mole of H₂ consist 8.00 x 10²⁰ molecules.

To know more about moles, visit the below link:

https://brainly.com/question/15356425

Answer:

The answer should be B. G-T-A-G-C-T

A pairs with T and G pairs with C.

Answer:

It's B, GTAGCT.

Explanation:

Answer:

18

Explanation:

6 (weights) x 3 (distance) = moment

Answer:

Polar molecules have a non-zero net dipole moment. Both CO2 and H2O have two polar bonds. However the dipoles in the linear CO2 molecule cancel each other out, meaning that the CO2 molecule is non-polar. The polar bonds in the bent H2O molecule result in a net dipole moment, so H2O is polar.

Explanation:

Answer:

mixtyre

Explanation:

Answer:

post it notes ,snacks , or any think that u love to do or eat when u get it right u can eat it

Answer: sodium-11   iron-26   sulfur-16

Explanation:

Answer:

sodium:11

iron:26

sulfur:16

Explanation:

pls..give..brainlist...to the..above..person..thx..u

Answer:

motion

Explanation:

Answer:

Chlorine, astatine, bromine, and fluorine.

Answer:

Fluorine, Chlorine, Bromine, and Astatine

Explanation:

they are all in group 17 meaning they have similer chemical properties.

Answer:

  11. 1, 4.5

  12. right; 4.5 > 1

  13. 10, 3

  14. left; 10 > 3

Explanation:

All you're being asked to do is count the squares in the pictures.

11. The number of squares for the left wave from bottom to top is 2, so the amplitude is 1/2 that, 2/2 = 1. For the right wave it is 9 squares from bottom to top, so the amplitude is 9/2 = 4.5.

  left amplitude: 1, right amplitude: 4.5

__

12. The right wave has greater amplitude. Evidence: 4.5 > 1. It also takes up more vertical space in the picture.

__

13. It is difficult to determine the wavelength of the left wave, because two full peaks are not shown. If we try to match corresponding points, they appear to be about 10 squares apart.

The right wave has 2 peaks in 6 squares, so about 3 squares between peaks.

  left: wavelength 10, right: wavelength 3

__

14. The left wave has greater wavelength. Evidence: 10 > 3.

Answer:

11. 1, 4.5

12. right; 4.5 > 1

13. 10, 3

14. left; 10 > 3

Explanation:

Answer:

Chemistry can help us to understand, monitor, protect and improve the environment around us.

Explanation:

I hope this helps u! :D

Explanation:

The right answer is Look .........

Certain females may only love a male for his looks and money.

Certain females may love a male for his personality.

Certain females may love a male depending on his height.

That's all I know.

Answer:

Hope it helps....⋋✿ ⁰ o ⁰ ✿⋌(・o・)

Answer:

chupapi muano goagaag djdu

Answer:

4 moles...................

Answer: H

Explanation:

Answer:

Sorry i might be wrong but I believe the answer is evaporation

Explanation:

Its says the diagram So is there a diagram u can show us?

Answer:

physical change, because a new substance is formed

Explanation:

Answer:

Bats eat hundreds of mosquitoes and other annoying insects at night.

Answer:

After one month, the Moon returns to the same location in the sky as the Sun and we see a New Moon again. The demo represents a month as 28 days for simplicity. But the real cycle of phases takes 29.5 days to complete.

Answer:

gvapor or gas to liquid

Explanation:

water which collects as droplets on cold surface when humid air is in contact with it

Answer: I think it's  A

Explanation: