CHEMISTRY HIGH SCHOOL

Polymers are formed by joining several units called monomers. What does the term monomer refer to?A) A unit made up of several compounds.
B) A unit made up of several atoms.
C) A unit made up of several molecules.

Answers

Answer 1

Answer: The term monomer refers to a unit made up of several atoms.This will make the correct answer B.

Answer 2

Answer:

The term monomer refers to:

a unit made up of several atoms

Explanation:

A monomer is a molecule that "can support polymerization whereby providing constitutional units to the fundamental structure of a macromolecule". Large quantities of monomers combine to form polymers in a method called polymerization.

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Which of the following substance is not an acid? 1. Substance A is tested and found to have a pH of 3. 2. Substance B, a common food, tastes sour. 3. Substance C causes metals to corrode. 4. Substance D feels slippery in solution.

Answers

Answer

The correct option is 4. feel slippery.

Explanation:

Acid and base have different characteristic which identify either it is acid or base.

1. Substance A is tested and found to have a pH of 3.

This option is for acid because acid have pH in the range of 0-6

2. Substance B, a common food, tastes sour?

This option is also for acid because acid have sour taste.

3. Substance C causes metals to corrode.

This option is also for acid because acid can cause corrosion

4. Substance D feels slippery in solution

This option is not for acid but it is for base because bases have the properties of slippery.

Substance d as it's the only one with none acid traits

SELECT ALL THAT APPLYat STP conditions, 0.25 moles of CO2(g), H2(g), NH3(g)
1. Will contain the same number of molecules
2. Will contain the same number of atoms
3. Will occupy the same volume
4. Will have the same g.f.w

Answers

The answer is 1 and 3. The number of atoms per molecule of these three substance is not equal. So they will not contain same number of atoms. And for gas, under same condition with same number of moles will have the same volume. The g.f.w is related to the atomic mass. So they are different.

Answer:

1 and 3

Explanation:

A gas has experienced a small increase in volume but has maintained the same pressure and number of moles. According to the ideal gas law, how has the temperature of the gas changed?

Answers

temperature has increased

Ideal Gas Law:

pressure * volume = (number of moles of gas) * (0.08206) * (temperature)

or short-hand:
PV = nRT

this equation can be transformed to solve for temperature as:
T = PV / nR

given there is no change in pressure and the volume of the container has increased, we know the temperature increases because volume is in the numerator--a larger number on top reflects an overall greater number.

B) It has increased slightly

How many joules are needed to warm 45.0 grams of water from 30.0 degrees C to 75.0 degrees C?

Answers

Answer : The amount of heat needed are, 8464.5 J

Explanation :

Formula used :

$q=m* c* (T_(final)-T_(initial))$

where,

q = heat gained = ?

m = mass of water = 45.0 g

c = specific heat of water = $4.18J/g^oC$

$T_(final)$ = final temperature = $75.0^oC$

$T_(initial)$ = initial temperature = $30.0^oC$

Now put all the given values in the above formula, we get:

$q=45.0g* 4.18J/g^oC* (75.0-30.0)^oC$

$q=8464.5J$

Thus, the amount of heat needed are, 8464.5 J

q=m x Cp x ∆T

m is the mass of the water, Cp is the specific heat of water and ∆T is the change in temperature of the water (final-initial temperature). q is the energy involved in the reaction, measured in joules.

q=(45.0) x (4.184 Jg^-1/°C^-1) x (45°C)
q=8472.6 Joules

Give examples of how low and high levels of radiation can each be helpful.

Answers

Visible light
Microwaves
Low frequency waves
Radio waves
Remote controls
Cordless phones
And so on!
Hope this is helpfull! :D
~Korey

The image is of the formation of a fault-block mountain.Which of these most likely occurs to result in the
formation of these mountains?
O The crust is compressed
O The crust does not spread apart
The center block is forced upward.
The hanging walls from the two parallel faults slip down

Answers

The Formation of these mountains will be caused by

The crust does not spread apart
The center block is forced upward.
The hanging walls from the two parallel faults slip down

Options B, C, and D is correct.

What are mountains?

Generally, a mountain is simply defined as a body that rises dramatically above its surroundings and is distinguished by steep slopes.

In conclusion, Mountains are formed from the formation of rocks over years in an Environment.

Polymers are formed by joining several units called monomers. What does the term monomer refer to?A) A unit made up of several compounds.B) A unit made up of several atoms.C) A unit made up of several molecules.

Answers

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What are mountains?

Polymers are formed by joining several units called monomers. What does the term monomer refer to?A) A unit made up of several compounds.
B) A unit made up of several atoms.
C) A unit made up of several molecules.