anyone know valency of phosphide and phosphite please tell me and also they are not same .If you know can i get their symbol too please​

Answer:

Thanks!!!

Explanation:

Answer:

true

Explanation:

Answer:

C is Correct

Explanation:

Protons and Neutrons make up the Nucleus while Electrons surround the nucleus in circular orbits with continuous rotation.

Answer:

ans:Ne=2,8,1

ans:2,8,7

Answer:

C

Explanation:

Answer:

All right. So let's calculate the density of a glass marble. Remember that the formula for density is mass over volume. So if I know that the masses 18.5 g. And I know that the um volume is 6.45 cubic centimeters. I can go ahead and answer this to three significant figures. So it's going to be 2.87 grams per cubic centimeter. Okay, that's our density. Now, density is an intensive process. Okay. We're an intensive property. I really should say. It doesn't depend on how much you have. Mhm. If I have one marble, its density is going to be 2.87 g per cubic centimeter. If I have two marbles, the density will be the same because I'll double the mass and I'll also double the volume. So when I divide them I'll get the same number. Okay, that's what makes it an intensive property. No matter how many marbles I have, they'll have the same density. Mass though is not an intensive property. So if I have six marbles and I want to know what the massive six marbles is. Well, I know the mass of each marble is 18.5 g. So the mass of six marbles Is going to be 100 11 g. Because mass is an extensive property. It depends on how much you have. If I change the number of marbles, I'm going to change the mass. That's an extensive property. All right. So we've calculated the density. We've calculated the mass and then what happens to the density of one marble compared to six marbles as we mentioned before. Since densities and intensive property, the densities will be the same, no matter how may.

Explanation:

Answer:

1.false

2.neutron

3.neutron

Answer:

1. false

2. zero

3. isotopes

hope it helps

Answer:

If the sugar concentration level of the must becomes too high at any given point--either at the beginning or during the fermentation--it starts to have an inhibiting effect on the yeast's ability to produce alcohol. In other words, the higher sugar concentration starts to act as a preservative effecting the fermentation in a negative way.

Explanation:

Fermentation is the process by which yeast converts the glucose in the wort to ethyl alcohol and carbon dioxide gas -- giving the beer both its alcohol content and its carbonation.

Answer:

Facts: A D and maybe C I think you are intended to say C

Explanation:

A is certainly not an opinion. It is either true, or it is not. I think it is intended as a fact.

B is an opinion (which I think is true)

C is kind of iffy. It might be true and it might be an opinion. In looking it up, it is factually incorrect. Cats are related to wildcats in the middle east.

D is also iffy. They can just eat disease free rodents. I'd classify it as more opinion than fact.

E. definitely an opinion.

Answer:

the answer to this problem is a

Answer:

C and D

Explanation:

A reaction is said to be decomposed, if the reactant is broken down to liberate single element.

Answer:

» Reactivity and color

Explanation:

though color is very minor answer because it also relates to a physical property.

[tex].[/tex]

Answer:

C. the amount of drug x given to mice

Answer:

The food coloring mixes through the hot water faster than it mixes with the cold water. The reason for this is because  in hot water, the water molecules have more energy and are moving faster than the molecules of cold water. This makes it way more easier for the dye to get mixed throughout the hot water.

Explanation:

Explanation:

No, that would be incorrect

Answer:

There arre two main parts of the atom, the nucleus and the orbital rings. The three subatomic particles are contained in each of these, the proton and neutron together in the nucleus and the electrons orbiting in the rings.

Answer: 37 protons, 48 neutrons, and 36 electrons.

Explanation: I assume "Revision" is Rubidium. It is atomic number 37, so it has 37 protons. It's atomic mass is 85, so it has an average of (85-37) = 48 neutrons. It has a charge of +1, so one electron of the original 37 has left.

Answer:  The combustion of methane (CH4) with O2.

Explanation:  This is a chemical reaction involving carbon:

 CH4 + 2O2 = CO2 + 2H2O

Answer:

81 °C

Explanation:

This is a calorimetry question so a few things you will need for this. The calorimetry equation q=mcΔT & the specific heat of water (4.2J/g•°C). Other definitions are:

q = heat added/released by a sample

m = mass of sample

c=specific heat of sample

ΔT = change in temperature

from here we can rearrange the equation to state:

q/(mc) = ΔT

1200J/((20.0g)(4.2J/g•°C)) = ΔT

14°C = ΔT

If the starting temperature was 95.0°C and we know that the temperature was cooled by 14°C then the final temperature of the water would be 81.

Answer:

C. 81 c

Explanation:

took the test :)

Answer:

3 exothermic reaction. only that much

Hi,

These are the answers.

• Question 2. C , Substance dissolves

• Question 3. D , Exothermic reaction

• Question 4. C , Endothermic reaction takes place

• Question 5. A , the products formed has more energy than reactants

Hope it helps you... pls mark brainliest if it helped you

Answer:

big ablsolty long pp

Explanation:

dong

Answer:

C

Explanation:

alkali metals are the Group I elements, which have 1 electron in their valence shells

Answer:

Alkali metals are the elements which have only one valence electron in their outermost or ultimate shell.

Explanation:

Alkaline Earth metals have 2 valence electron in their outermost shell and readily give up their 2 electron to achieve stability.

Rare Earth Metals have 3 valence electron in their outermost shell and they have high magnetic moments and divert range of magnetic structure.

Alkali Earth metals have 1 valence electron.

Transition metals generally have 2 valence electron .

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answer/

1 grams Calcium Phosphate to mol = 0.00322 mol

no. of moles= 0.00322×25

no. of moles = 0.0805

Answer:

solutions is a homogenous mixture while colloids and suspensions are heterogeneous mixtures made up of 3 or more substances

Explanation:

homogeneous- made up of one thing

heterogeneous- made up of 2 or more things

Answer:  1.8x10^-4 M H+

Explanation:  The number of moles of NaOH added to the 100 ml soultion will be equal to the number of moles of H+ present in that solution.  

Moles NaOH in 7.2 ml of 2.5x10^-3 M NaOH

(2.5x10^-3 M NaOH) is the same as 2.5x10^-3 moles NaOH/liter

(2.5x10^-3 moles NaOH/liter)*(7.2 ml)*(1 liter/1000ml) = 1.8x10^-4 moles NaOH used to titrate 100 ml of the acid.  That means there was 1.8x10^-4 moles of H^+ in 100 ml.  

Concentration of H^+ = (1.8x10^-4 moles H)/0.100 l) = 1.8x10^-4 M H+

(pH of 3.74)

Answer:A force is a push or pull upon an object resulting from the object's interaction with another object.

A force acting on an object causes the object to change its shape or size, to start moving, to stop moving, to accelerate or decelerate

Answer:

Freezing water and cracking limestone are physical changes.

Answer:

9.1093837015 × 10^−31 kg

Very small mass

Answer:

A. The product formed have more energy than the reactants.

This is because it is an endothermic reaction.

[tex].[/tex]

Answer:

A. They are in the nucleus and never leave.

Explanation:

Protons as well as neutrons are located in the nucleus of the atom.

hope this helps!

The correct answer to the question is Rubidium (Rb)

Rubidium (Rb) is a group 1 element and as such, it can form bond by losing it's valence electron (i.e 1 electron) easily.

Gallium (Ga) is a group 13 element. It can only form bond by losing it's 3 valence electrons.

Argon is a group 18 element. This group has completely filled outermost shell and are very stable. They do not involve in bond formation.

Iodine (I) is a group 17 element. It is more difficult for this group to lose its 7 valence electrons hence, they form bond by accepting 1 electron.

With the above information, we can conclude that Rubidium will most likely lose electron to form bond.

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Answer:

(Question 1)Which element would most likely lose electrons to form positive ions when bonding with other elements?

(Answer) rubidium (Rb)

(Question 2) Which statement about sodium chloride is correct?

(Answer) The sodium atom transfers electrons to the chlorine atoms to form ionic bonds.

(Question 3) Based on their locations in the periodic table, which two elements are most likely to form covalent bonds with each other?

(Answer) nitrogen (N) and oxygen (O)

(Question 4) Which phrase best describes electronegativity?

(Answer) the relative strength with which an element attracts electrons in a chemical bond

(Question 5) Based on the information in the table, which pair of elements would likely form the least polar bonds with each other?

(Answer) bromine and nitrogen

Explanation:

just finished the quick check enjoy UwU

The parts of the text on the page that use examples of how the flow of matter through a system is energy driven and has the capacity to do work are;

1) The flow of water down rivers passing through hydro power dams to perform the following works;

2) The flow of electrons that corresponds to the flow of electricity (in the reverse direction) to perform the following works;

3) The lifting of the hammer by the cam which gains gravitational potential energy that is converted to kinetic energy as the hammer drops

The hammer is repeatedly lifted and dropped by the cam to do the following work

4) The chemical potential energy stored in bonds by virtue of the relative atomic distances which produces kinetic energy from the chemical potential energy

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