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3 years ago

How do Atoms combine to form new substances?

2 answers:

4 0

Answer: it holds two atoms together in a molecule. During a chemi- cal reaction, some of the bonds in the original molecule break. New bonds form to produce a new substance.

Explanation:

suter [353]3 years ago

4 0

Answer:

2 atoms are held together in a molecule?

Explanation:

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Why is air humid and weather wet at low pressure belts

natima [27]

In low-pressure belts, there is an absence of surface winds because winds approaching them rise near their margin. This causes vertical currents. when they pass along the ocean, they suck up a lot of water and get a lot of moisture, thus giving wet and humid weather.

3 0

4 years ago

You are given the following boiling point data. Which of the liquids would you expect to have the highest vapor pressure at room

Leokris [45]

Answer:

Diethyl ether

Explanation:

vapor pressure - the pressure exerted by the gaseous molecules on the walls of the container , is called its vapor pressure.

The compound with higher boiling point , will have lower vapor pressure ,

and the compound with lower boiling point , will have higher vapor pressure.

Hence, Boiling point and vapor pressure have inverse relation.

The vapor pressure and boiling point both, depends on the inter molecular interactions , i,e, the interaction between the molecules.

Since, the compound with stronger inter molecular interactions, will not easily convert to gas, hence will have higher boiling point between , therefore , its vapor pressure would be less.

But the compound with less inter molecular interactions , can easily vaporize to convert to gaseous state and hence will have lower boiling point, therefore, its vapor pressure would be higher .

Among all the options , diethyl ether have lowest boiling point , hence, will have highest vapor pressure , at room temperature.

6 0

3 years ago

A silver rod and a SHE are dipped into a saturated aqueous solution of silver oxalate, Ag2C2O4, at 25°C. The measured potential

nika2105 [10]

Answer:

3.50*10^-11 mol3 dm-9

Explanation:

A silver rod and a SHE are dipped into a saturated aqueous solution of silver oxalate, Ag2C2O4, at 25°C. The measured potential difference between the rod and the SHE is 0.5812 V, the rod being positive. Calculate the solubility product constant for silver oxalate.

Ag2C2O4 --> 2Ag+ + C2O4 2-

So Ksp = [Ag+]^2 * [C2O42-]

In 1 L, 2.06*10^-4 mol of silver oxalate dissolve, giving, the same number of mol of oxalate ions, and twice the number of mol (4.12*10^-4) of silver ions.

So Ksp = (4.12*10^-4)^2 * (2.06*10^-4)

= 3.50*10^-11 mol3 dm-9

7 0

3 years ago

What is the systematic name for the following structure, specifying cis-/trans-?

Andrej [43]

Answer:

cis-3,4-dimethyl-3-hexene

Explanation: since the substituents are on same side, it call cis. Followed by the name

6 0

3 years ago

You may recall that the products of the complete combustion of a

Vesna [10]

Answer: $CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

Explanation: According to law of conservation of mass, mass can neither be created nor be destroyed.

Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.

This is an example of combustion reaction in which hydrocarbon reacts with oxygen to form carbon dioxide and water. This is an exothermic reaction in which a large amount of heat is liberated, thus water also exists as vapors.

$CH_4(g)+2O_2(g)\rightarrow CO_2(g)+2H_2O(g)$

3 0

3 years ago

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