CHEMISTRY HIGH SCHOOL

Which changes will decrease the electric force between two positively charged objects? Check all that apply.moving them closer together


moving them farther apart


adding electrons


removing electrons


adding neutrons


removing neutrons

Answers

Answer 1
Answer: The changes that will decrease the electric force between two positively charged objects is by moving them closer together and moving them farther apart
Answer 2
Answer:

Answer : Option B) Moving them farther apart.

Explanation : Force (F) is inversely proportional to distance (D) separated by charges.

F=(1)/(D^(2))

When Electrostatic force is found to be inversely proportional between two positive charges which is separated by a distance D, then to decrease the electrostatic force of one can try to change the distance between the two positive charges in such a way that it increases the distance and decreased the electric force. The best option would be to move the them far apart from each other.

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The average atomic mass of oxygen is 15.9994 amu. The atomic masses of its three isotopes are as follows: O-16: 15.995 amu; O-17: 16.999 amu; O-18: 17.999 amu Which isotope is most likely to have the greatest abundance in nature?
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What volume of a 2.5 M stock solution of acetic acid (HC2H3O2) is required to prepare 100.0 milliliters of a 0.50 M acetic acid solution?

Answers

Mi * Vi = Mf * Vf

2.5 * Vi = 0.50 * 100.0

2.5 Vi = 50

Vi = 50 / 2.5

Vi = 20 mL

hope this helps!

Answer:

20 milliliters

Explanation:

I don't cap

Which of the following statements is true? Atoms of isotopes of an element have different numbers of electrons. Atoms of isotopes of an element have different numbers of neutrons. Atoms of the same element all have the same mass. Atoms of isotopes of an element have different numbers of protons.​

Answers

Answer:

atoms of isotopes of an element have different numbers of neutrons.

Explanation:

isotopes have the same number of protons, but different numbers of neutrons.

Describe meteor showers​

Answers

Answer:

a rain of asteroids coming from space

Explanation:
Meteor showers occur when dust or particles from asteroids or comets enter Earth's atmosphere at very high speed. When they hit the atmosphere, meteors rub against air particles and create friction, heating the meteors. The heat vaporizes most meteors, creating what we call shooting stars.

A 115.0-g sample of oxygen was produced by heating 400.0 g of potassium chlorate. 2KClO3 mc019-1.jpg 2KCI + 3O2 What is the percent yield of oxygen in this chemical reaction?

Answers

The balanced equation that describes the reaction of heatinf potassium chlorate to produce potassium chloride and oxygen is expressed 2KClO3 = 2KCI + 3O2. For a 400 g potassium chloride, using stoichiometry, the mass oxygen produced is 156.67 grams oxygen. The actual product weighed 115.0 grams. Yield is equal to 115/156.67 or 73.74%

Answer:

The percent yield of oxygen in this chemical reaction is 73.71 %.

Explanation:

Experimental yield of oxygen gas = 115.0 g

Theoretical yield:

2KClO_3rightarrow 2KCI + 3O_2

Mass of potassium chlorate = 400.0 g

Moles of potassium chlorate = (400 g)/(122.5 g/mol)=3.2653 mol

According to reaction, 2 moles of potassium chlorate gives 3 moles of oxygen gas.

Then 3.2653 mol of potassium chlorate will give:

(3)/(2)* 3.2653 mol=4.89795 mol

Mass of oxygen gas :

32 g/mol* 4.89795 mol=156.73 g

Percentage yield:

\%=\frac{\text{Experimental yield}}{\text{Theoretical yield}}* 100

\%=(115.0 g)/(156.73 g)* 100=73.71\%

The percent yield of oxygen in this chemical reaction is 73.71 %.

Which state of matter is more dense?​

Answers

Answer:

Gas - Liquid - Solid

Explanation:

If you are asking which state of matter is more dense of which, then this is the order.

- Liquid is more dense than Gas

- Solid is more dense than Liquid

- Gas is less dense than Air

Just to let you know, Solid is the most dense of them all, making Gas the least dense of the three.

Hope this helps! ^^

solids have more dens than any type of matter and I am sure btw

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Answers

Ocean waves and radio waves are both forms of waves that transfer energy. They share the characteristics of wave-like behavior and energy transfer. However, they differ in several aspects.

Ocean waves require a physical medium (water) to propagate, while radio waves can travel through a vacuum or the atmosphere. Ocean waves have lower speeds compared to radio waves, which travel at the speed of light. They also have different frequency and wavelength ranges, with ocean waves having lower frequencies and longer wavelengths, while radio waves have higher frequencies and shorter wavelengths.

Ocean waves are generated by wind, seismic activity, or gravitational forces, while radio waves are generated by electronic devices. They are detected and utilized for different purposes, with ocean waves being measured for coastal engineering and oceanography, and radio waves being used for communication and radar systems.
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