1.The table below lists some of the common ingredients in toothpaste.
What is the name of the ingredient responsible for preventing decay?

Sodium sulfate
Sodium fluoride
Sodium fluorine
Nitrogen fluoride

Answer:

C,D, and A I believe

Explanation:

Answer:

You did very well and its correct.

Explanation:

Great Job!

Answer:

Sodium and Potassium only

This question involves the concepts of de Broglie's wavelength and momentum.

The velocity of the electron must be "1754.27 m/s".

de Broglie's wavelength is a wavelength associated with a moving matter particle. It is connected to the momentum of the particle by the following formula:

[tex]P =\frac{h}{\lambda}\\\\mv=\frac{h}{\lambda}\\\\v=\frac{h}{m\lambda}\\\\[/tex]

where,

v = velocity of electron = ?

h = Plamk's Constant = 6.625 x 10⁻³⁴ J.s

m = mass of electron = 9.1 x 10⁻³¹ kg

λ = de Broglie's wavelength = 415 nm = 4.15 x 10⁻⁷ m

Therefrore,

[tex]v=\frac{6.625\ x\ 10^{-34}\ J.s}{(9.1\ x\ 10^{-31}\ kg)(4.15\ x\ 10^{-7}\ m)}[/tex]

v = 1754.27 m/s

Learn more about de Broglie's wavelength here:

https://brainly.com/question/20339737?referrer=searchResults

Answer:

Explanation:

Answer:

Scientists use models to study atoms because atoms are extremely small and can't even be seen. If atoms can't be seen, it's easier to study and.

Explanation:

hope it helps you

Answer: In this order

Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune

Explanation:

Answer:

Mars.....................

Answer: If two positive charges interact, their forces are directed against each other. The two charges repel each other.

Explanation: The same occurs with two negative charges, because their respective forces also act in opposite directions.) The electric field and resulting forces produced by two electrical charges of the same polarity.

Good luck luv.

Answer:

CaSe

Explanation:

not sure!!

Answer: Nonpolar Covalent Bond

Explanation: A Nonpolar Covalent Bond is created when atoms share their electrons equally. This usually occurs when two atoms have similar or the same electron affinity. The closer the values of their electron affinity, the stronger the attraction. This occurs in gas molecules; also known as diatomic elements.

Answer:

6.02 x 10^23 (6.02 times 10 to the power of 23)

crystallization is a process which helps to separate a pure solid from a solution in its crystal form. This is the in use to purify solid. For an example the salt we get from seawater can have many impurities in it. Hence, the process of crystallization is in use to remove these impurities.

Sugar and salt are examples of products where crystallization does not only serve as separation/purification technique, but where it is also responsible for getting crystals with the right size (and shape) for further application of the products.

- BRAINLIEST answerer

Answer:

Crystallization is the process by which a solid forms, where the atoms or molecules are highly organized into a structure known as a crystal. Some of the ways by which crystals form are precipitating from a solution, freezing, or more rarely deposition directly from a gas.

Sugar and salt are two mixtures that can be seperated by crystallization

Explanation:

Explanation:

The ice cube which was solid has turned into the liquid water because the air temperature is warmer than the freezers. Which means the ice particles gather heat energy from the warmer air. Therefore the ice particles have enough energy to break apart (melt)into smaller particle arrangements.

Answer:

b

Explanation:

north is up south is bottom

Answer:

C. South pole on the left end and north pole on the right end

Explanation:

From the figure, we can conclude that the poles of the magnet are on either sides of the magnet

Therefore, options 1 and 2 are excluded

It is a convention that the magnetic field lines move out of the north pole of a magnet and into the south pole of the magnet

From the figure, we can see that the magnetic field lines are moving out from the right end and into the left end

This means that the north pole is at the right end and that the south pole is at the left one

Answer:

the heat vaporization of water is very high with small amounts of water you can vaporize the water as it hits the rocks into steam. (i think)

Explanation:

Answer:

Cell membranes (plasma membranes) help organisms maintain homeostasis by controlling what substances may enter or leave cells.

[tex]W = \displaystyle \int dW = \displaystyle \int^{V_2}_{V_1} p ~dV = p(V_2 - V_1) = p \Delta V[/tex]

Answer:

we can use 100g of compounds as the basis.

Explanation:

Answer:

[tex]50.0 \div 59.0 = 10[/tex]

right

Answer:

You have to remember this memory aid, diagonals and all.

You have to keep a tight tally of the electrons you’ve used so far so you don’t go over the number of electrons in the element you’re working on.

You have to remember how many electrons fit into each subshell (s, p, d, f).

It takes a lot of time, especially when the element has more than 20 electrons.

Explanation:

Answer:

Electrochemistry

Explanation:

Answer:

1. F, H, E

2. A, D, I

3. G

4. E, B, H

5. C

Explanation:

Answer:

Frozen Meats – Frozen raw meats that are properly vacuum sealed can be stored in the freezer from 1-3 years depending on the type of meat. However, raw meat that is not vacuum sealed will only last 1-12 months depending on the meat.

Explanation:

hop this helps

Answer: Six months or three years

Explanation: Frozen meats, poultry, and fish can last in the freezer for up to six months and when they are vacuum sealed, frozen meats can stay fresh and free from freezer burn for up to 3 years.

Answer:

addition reactions, elimination reactions, substitution reactions, pericyclic reactions, rearrangement reactions, photochemical reactions and redox reactions

Answer:

Explanation:

The new pressure can be found by using the formula for Boyle's law which is

[tex]P_2 = \frac{P_1V_1}{V_2} \\[/tex]

where

P1 is the initial pressure

P2 is the final pressure

V1 is the initial volume

V2 is the final volume

From the question we have

[tex]P_2 = \frac{125\times3.50 }{2.75} = \frac{437.5}{2.75} \\ = 159.090909...[/tex]

We have the final answer as

Hope this helps you

A reaction is said to have reached equilibrium when the reaction rate is equal in both directions (c).

Like, take the example of copper in copper sulphate solution. When you add Cu to CuSO4 soln., there won't be any change occurring as the reaction rate is equal (Cu is added to CuSO4 soln., there won't be any change as displacement reaction won't take place due to Cu being the same metal as in CuS04 soln...their reaction is the same).

_____

RainbowSalt2222 ☔

Answer: The iron equilibrium is the more positive, and so will go in the forward direction. The tin equilibrium is less positive (more negative), and will be driven backwards. So the tin(II) ions will reduce iron(III) ions to iron(II) ions. In the process, of course, the tin(II) ions will be oxidised to tin(IV) ions.

Explanation:

Answer:

Explanation: