CHEMISTRY HIGH SCHOOL

Use the drop-down menus to identify the strongest intermolecular force that is likely to affect each of thesamples shown below.
Η Ο Η
TIL 1
H-C-C-C-H
1-CI
lodine monochloride, ICI
H
H
Acetone, C3H60
H-F
A mixture of water (H2O) and hydrogen fluoride
(HF)

Answers

Answer 1
Answer:

Answer:

London dispersion, dipole-dipole interactions, hydrogen bonding

Explanation:

Please mark brainliest
Answer 2
Answer:

Answer:

lodine monochloride- dipole-dipole interactions

Acetone-London dispersion

A mixture of water (H2O) and hydrogen fluoride-hydrogen bonding

Explanation:

Edg 2020 (Brainliest Lol)

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Based on relative bond strengths, classify these reactions as endothermic or exothermic.

N which phase(s) of matter are the atoms closely packed but still able to slide past each other?gas
liquid
solid and gas
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Answers

Answer:

Liquid

Explanation:

Please don't jugde me if I got it wrong

Answer:

I belive its liquid if I'm right because liquids are packed together when they take shape but they are still able to move.....brainliest???

Choose the pieces of evidence that supported the existence of Pangaea and continental drift theory.o Fossilized plants and animals of the same species found on separate continents.
o Geological features, such as mountain ranges, that align on matching coasts of different continents.
o Island arc ranges are still connected under the Atlantic Ocean.
o Antarctica's glacial features are similar to the Arctic's.

Answers

Pangaea is scientifically known as the original whole mass of land that eventually was divided into separate mass entities called continents as a result to natural phenomena like earthquakes. This is more explained inthe continental drift theory. After rigorous collection of evidences, scientists noticed that fossilized plants and animals of the same species, also with the coastlines match on different continents. The answers are the first and second choices (A and B).

Fossilized plants and animals of the same species found on separate continents.

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What will happen to the volume if the amount of a gas is decreased at constant temperature and pressure?

Answers

To predict the changes, we first that this gas is ideal. An ideal gas i when the molecules of the gas occupy a negligible volume and have no interactions with one another. The conditions of this gas can be calculated by the use of the Ideal Gas equation which is expressed as: PV=nRT. If this gas is at a constant temperature and pressure and the amount is decreased then the volume will most likely decrease as well.

Choose the system to which this item belongs: stomachexcretory
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digestive
respiratory

Answers

Digestive. This also includes the intestines.
The stomach belongs to the digestive system, where your food goes to break down.

How many (s) sublevels are present in calcium atom (Ca)?

Answers

Answer:

nineteen atoms

Explanation:

nineteen atoms

The value of ΔH° for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g of Na2O2 with water is __________ kJ. 2Na2O2(s) + 2H2O(l) → 4NaOH(s) + O2(g) The value of ΔH° for the reaction below is -126 kJ. The amount of heat that is released by the reaction of 25.0 g of Na2O2 with water is __________ kJ. 2Na2O2(s) + 2H2O(l) → 4NaOH(s) + O2(g) 40.4 80.8 -126 67.5 20.2

Answers

The amount of heat that is released by the chemical reaction of 25.0 g of Na_(2)O_2 with water is -20.223 Joules.

Given the following data:

  • Mass of Na_(2)O_2  = 25.0 grams
  • Enthalpy of combustion = -126 kJ/mol

To find the amount of heat that is released by the chemical reaction of 25.0 g of Na_(2)O_2 with water:

First of all, we would determine the number of moles of Na_(2)O_2  in this chemical reaction:

                2Na_2O_2_((s)) + 2H_2O_((l)) ------> 4NaOH_((s)) + O_2_((g))

Number\;of\;moles \;(Na_(2)O_2)= (Mass\; of\;Na_(2)O_2)/(Molar\;mass\;of\;Na_(2)O_2)

Substituting the values into the formula, we have;

Number\;of\;moles \;(Na_(2)O_2)= (25.0)/(77.98)

Number of moles (Na_(2)O_2) = 0.321 moles.

Now, we can find the quantity of heat released when Na_(2)O_2reacts with water:

2 mole of  Na_(2)O_2 = -126 kJ/mol

0.321 mole of  Na_(2)O_2 = X kJ/mol

Cross-multiplying, we have:

2X = 0.321 × (-126)

2X = -40.446\n\nX = (-40.446)/(2)

X = -20.223 Joules.

Read more: brainly.com/question/13197037

Answer : The amount of heat released by the reaction is, 20.2 kJ

Explanation :

First we have to calculate the number of moles of Na_2O_2.

\text{Moles of }Na_2O_2=\frac{\text{Mass of }Na_2O_2}{\text{Molar mass of }Na_2O_2}

Molar mass of Na_2O_2 = 77.98 g/mole

\text{Moles of }Na_2O_2=(25.0g)/(77.98g/mole)=0.320mole

Now we have to calculate the heat released during the reaction.

The balanced chemical reaction is:

2Na_2O_2(s)+2H_2O(l)\rightarrow 4NaOH(s)+O_2(g)

From the reaction we conclude that,

As, 2 moles of Na_2O_2 releases heat = 126 kJ

So, 0.320 moles of Na_2O_2 releases heat = (0.320)/(2)* 126=20.2kJ

Therefore, the amount of heat released by the reaction is, 20.2 kJ
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