How is the charge of an atom determined?
how is the amount of neutrons determined?

Answers

Answer 1

Answer: Atoms have positively charged protons and negatively charged electrons, the number of each tells you the charge.
The ionic charge is the number of protons subtracted by the number of electrons. They usually have the same charge, but with opposite signs, Electrons ( -) and protons ( +)
To find the neutron number,subtract the proton number from the atomic mass. It will give you the neutron number.
Hope this helps.

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Define in your own words: Solute, Solvent and Solution.

Answers

The substance that is being dissolved is called the solute and the substance that does the dissolving is called the solvent. So the solvent dissolves in the solute the forming a solution.

How does evelyn hear music?

Answers

Who even is Evelyn?

What is required for a chemical reaction to occur?(1) standard temperature and pressure(2) a catalyst added to the reaction system(3) effective collisions between reactant particles(4) an equal number of moles of reactants and products

Answers

I think the correct answer is option 3. A requirement for a chemical reaction to happen is an effective collisions between the reactant particles because it is where the electrons in the reactants interact with each other and form new substances.

47.0ml of a HBr solution were titrated with 37.5ml of a 0.215M LiOH solution to reach the equivalence point. what is the molarity of the HBr solution

Answers

Hello!

The molarity of the HBr solution is 0,172 M.

Why?

The neutralization reaction between LiOH and HBr is the following:

HBr(aq) + LiOH(aq) → LiBr(aq) + H₂O(l)

To solve this exercise, we are going to apply the common titration equation:

$M1*V1=M2*V2$

$M1=(M2*V2)/(V1)= (0,215 M * 37,5 mL)/(47 mL)=0,172 M$

Have a nice day!

Answer:

0.172

Explanation:

A sample of vinegar has a pH of 5, and a sample of rainwater has a pH of 6. Which of the following statements best describes these two substances?A. Both samples are bases, and vinegar is more basic.
B. Both samples are acids, and vinegar is more acidic.
C. Both samples are bases, and rainwater is more basic.
D. Both samples are acids, and rainwater is more acidic.

Answers

Answer: The correct answer is option B.

Explanation:

pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution. It ranges to the scale of 1-14. The solutions are divided into 3 categories on the basis of the pH range:

If the pH of the solution ranges from 1 to 6.9, the solution is said to be acidic. Less the pH, more the acidity of the solution.
If the pH of the solution ranges from 7.1 to 14, the solution is said to be basic. More the pH, more the acidity of the solution.
If the pH of the solution is 7, the solution is said to be a neutral solution.

We are given:

pH of vinegar = 5

pH of rainwater = 6

As, the pH of both the solutions is less than 7. Thus, both the solutions are acidic in nature and also pH of vinegar is less, so this solution will be more acidic in nature.

Hence, the correct answer is Option B.

Statement B correctly describes the situation.

The_____is an organelle that can give instructions for a
cell to reproduce and send directions to organelles to make needed
materials.