What happens in the following cases. [ ( write two eg for each also write is there any ex
change of energy ) ] i) when an element combine with another element. ii) When an element combine with a compound. iii) When a compound combine with another compound.

Answer:

A

Explanation:

Because it is the greatest

to be honestl id ldm

Given what we know, we can confirm that a compound will be a binary compound if it contains both a metal and a non-metal element.

Therefore we can confirm that since a metal will donate its electron to a non-metal element to form covalent bonds, we will know if the compound is binary or not based on the presence of a metal and a non-metal.

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Answer:

It's true

Hope it helps:-)

Answer:

true

Explanation:

Answer:

can't help you sorry bye

Answer:

A push or pull is referred to as a force. Forces can cause objects to move, slow, stop, or change the direction in which they travel. The force of gravity, for example, pulls all objects toward the Earth's center. Every time two things interact, a force is exerted on each of them. When this happens, the two items no longer feel the force after the interaction ends.

Explanation:

Force is that external physical cause which changes or tends to change:

hope this helps you.

To determine the molecules of butane we can either use multiple steps or use a combined equation based on the following formulas:

Molecules of butane = Moles × Avogadro's Number

Moles of Butane = Mass ÷ Molar Mass

Mass of Butane = volume × Density

∴ Molecules of butane

   = [(volume × Density) ÷ Molar Mass]  × Avogadro's Number

   = ([(25.0 ml × 0.6011 g/ml) ÷ 58.12 g/mol] × (6.022 × 10²³ molecules/mol))

   = 1.557 × 10²³ molecules

Answer:

I believe the answer is compressed

Explanation:

The answer may be a slightly different word, but if it's looked at by a human and not a robot compressed should work too

Gases can be compressed by applying high pressure. Thus large volume of oxygen can be contained in a tank by compressing the gas with high pressure.

Gases are substances in state where its molecules are located far apart and are able to spread in the surroundings. This property of spreading based on the concentration difference is called diffusion.

Thus, gases diffuse from high concentrated area to lower concentration region. Gaseous substances does not have a certain volume, mass or shape. But when they are collected into a container then the volume will be that of the container.

in liquid state, molecules are some more closer in comparison to gases and an intermolecular attraction of force bind these molecules together to have a certain volume and mass. Whereas in solids, all the molecules are tightly packed.

Gases can be liquified by applying high pressure at low temperature so that the distance between molecules can be decreased and an intermolecular force of attraction occurs there.

So that large volume of gases can be collected  to a tank by compression using high pressure.

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Answer:

A positive charge in the balloon attracts the negative charges in the wall

Explanation:

The question states attract, so we know it's not going to be option C.

The wall clearly doesn't change shape, so that eliminates option B as well.

The balloon gets positively charged, and so for an attractive force to appear, you need the opposite charge from the wall, i.e. negative.

Remember: opposite charges attract

Which means, the only option that makes sense is Option D.

P.S.: You could've concluded it's option D just because it's the only one that contains the word "attract" in there!

Hope I helped! :)

Answer:

a positive charge in the ballon attract the negative charge of the wall

Explanation:

Answer

85

Explanation:

Astatine has an atomic number of 85.

This means it has 85 positively charged protons.

If it is neutral, it must have the same number of negatively  charged electrons, or 85

Answer:

chemical stability is important to consider in the comprehensive assessment of pharmaceutical properties, activity, and selectivity during drug discovery.

Answer:

In general, molecules are stable because all their constituent atoms have sufficient "valence" electrons-that is, electrons that participate in chemical bonding. Such electrons reside in the outer, or valence, "shell," which must fill up with the appropriate number of electrons for the bound atoms to be come stable.

Explanation:

Answer:

1,2,3,4,8,9,10,12,14,15 and 16

Explanation:

Coz they have different kinds (colours) of atoms

The rest are pure substances,

I'm not so sure though, double check after this

Answer:

When 6.38 moles of O2 and 9.15 moles of Al react, the ratio of aluminum to oxygen is 9.15/6.38 = 1.434. This shows that all of the oxygen is consumed before the aluminum and when the reaction ends the reactant aluminum is left. The number of moles of Al2O3 formed is approximately 4.25 moles.

Answer:

Ionic

Explanation:

Na is a metal and Br is a non-metal. Makes an ionic bond. Hope that helps

Answer:

C2H4(g) + Cl2(g)→C2H4Cl2(g)

This is an example of synthesis reaction, when compounds are joined together.

Answer: Divide the mass of the first dissolved component by the solution mass, and then multiply the result by 100 to calculate the mass percentage. In our example, the first dissolved compound is NaCl; the mass percent is (10 g / 136 g) x 100 percent = 7.35 percent.

Explanation: its up, look