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3 years ago

The chemical properties of an atom are related to the number of its what

Chemistry

2 answers:

Dima020 [189]3 years ago

8 0

The number and arrangement of electrons in the outermost shell, or valence shell.

RideAnS [48]3 years ago

7 0

The properties of the electrons of an atom are determined in large part by the number of protons presented in the nucleus of the atom

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What is heat of vaporization?

Anestetic [448]

Explanation:

It is the heat required to change a gram of substance from a liquid to a gas.

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3 years ago

This question has multiple parts. Work all the parts to get the most points. An aqueous antifreeze solution is 39.0% ethylene gl

nlexa [21]

Answer:

Molality = 10.300 m

Molarity = 6.5970 M

mole fraction = 0.156549

Explanation:

39.0 % = ethylene glycol

61.0 % = water

imagine the total mass = 100g

39.0% ethylene glycol = 39g

61.0 % water = 61g

1) Molality = number of moles / mass of solvent (kg)

Molar mass of ethylene glycol = 62.07g/mole

mole = 39g / 62.07g/mole = 0.6283 moles

Molality = moles / mass of solvent = 0.6283 moles / 0.061kg = 10.300 m

2) Molarity = number of moles / volume of solution

Since we know the density of the solution = 1.05g /ml

⇒ volume = 100g / 1.05g /mL = 95.24 mL = 0.09524 L

Molarity = 0.6283 moles / 0.09524 L = 6.5970 M

3) Mole fraction

moles water = 61g / 18.02g/mole = 3.38513 moles

Total number of moles = moles of ethylene glycol + moles of water = 0.6283 + 3.38513 = 4.0134276 moles

Mole fraction = 0.6283/ 4.0134276 = 0.156549

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3 years ago

Write chemical equations for the following electrolytes dissolving in water

Elden [556K]

$1)NaCl=>Na^{+}+Cl^{-}\\2)PbSO_{4}=>Pb^{2+}+SO_(4)^{2-}$

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3 years ago

how do the components that process information in the ENIAC compare with the components that process in a modern laptop computer

STALIN [3.7K]

For starters, ENIAC was as big as a room and had many parts that don't even exist nowadays. It was operated by humans and broke down often. Information processing was a tedious and a difficult process. Modern components enable much faster data travel, fewer opportunities for the thing to break down, and an easier access for people to process data.

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3 years ago

What does the pudding represent in the plum pudding model of the atom?

dolphi86 [110]

Answer:

the answer is According to this model, the atom is a sphere of positive charge, and negatively charged electrons are embedded in it to balance the total positive charge. The electrons are like plums in a pudding.

Explanation:

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3 years ago

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