Matter is classified as a(1) substance, only
(2) substance or as a mixture of substances
(3) homogenous mixture, only
(4) homogenous mixture or as a heterogeneous mixture

Answers

Answer 1

Answer: I think the best option is the second option. Matter is classified as a substance or as a mixture of substances. It is a physical substance that occupies space and has mass. Technically, everything we from our eyes is considered as matter.

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An experimental procedure requires 10 ml of acid to be dissolved into a beaker of water. An additional 5 ml of acid is added to the solution. Which statement best describes the new solution? the strength of the acid in the solution has been increased the concentration of acid in the solution has decreased by one half the concentration of acid in the solution has been increased the strength of the acid in the solution has decreased by one half

Answers

Answer:

The correct statement is that the concentration of the acid in the solution will increase.

Explanation:

On the basis of the given question, if one dissolves 10 milliliters of acid in a beaker of water, the acid will get diluted. As the number of moles of acid is not going to change, thus, one can use the formula:

M1V1 = M2V2

Here, M is the concentration of the acid in the solution,

V1 = 10 ml

V2 = V water + 10

If we supplement, an other 5 ml of acid, the new concentration of the acid will be:

M = M1 (5 ml) + M2 (Vwater + 10 ml) / (5 ml + V water + 10 ml)

Therefore, the concentration of the acid in the new solution will increase.

Answer:

the concentration of acid in the solution has been increased.

Explanation:

the answer is C on edge.

Which of these subatomic particles adds the most mass to an atom?a. proton
b. photon
c. electron
d. It depends on what the element is.
An atom with two protons, three neutrons and two electrons would have a mass of about how many atomic mass units?
a. 2
b. 3
c. 5
d. 7

Answers

The answer for the first question is A. Proton is the subatomic particles which adds most of the mass of an atom as well as the neutron since they have the same mass. Photon, on the other hand, is not one of the subatomic particles.

A scientist carries out a reaction twice. In Trial A, the scientist combines the reactants in a container. In Trial B, the scientist combines the reactants in the same container, but she also adds a catalyst. If everything else is the same about the two trials, what is most likely true about Trial B?

Answers

Trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

What is a catalyst?

A catalyst is a substance that can be added to a reaction to increase the reaction rate without getting consumed in the process.

A catalyst is a substance that speeds up a chemical reaction or lowers the temperature or pressure needed to start one, without itself being consumed during the reaction.

Catalysts slow down reaction rates which will in turn mean a loweractivation.

Hence, trail B will have a lower activation energy than trail A because in this trial the scientist added a catalyst.

Learn more about the catalyst here:

brainly.com/question/1565029

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Answer:

It will have a lower activation energy than Trial A.

Explanation:

Trail B will have a lower activation energy than trail A because in this trial the scientist adds a catalyst. Catalysts slow down reaction rates which will in turn mean a lower activation.

Prioritization is an example of a skill that helps you reach long term goals because

Answers

Answer:

because it helps you to understand what’s the most important thing on your ”to - do” list and helps you to get it done. the higher up it is on your list, the more you have to prioritize it to get it dome.

If 20 milliliters of 4.0 M NaOH is exactly neutralized by 20 milliliters of HCL, the molarity of the HCL is

Answers

Volume of NaOH = 20 mL / 1000 = 0.02 L

Molarity NaOH = 4.0 M

number of moles NaOH :

n = M * V

n = 4.0 * 0.02

n = 0.08 moles of NaOH:

Finally we calculate the number of moles of HCl in the solution from the stoichiometry of the reaction :
HCl + NaOH = NaCl + H₂O

1 mole HCl ---------- 1 mole NaOH
? moles HCl --------- 0.08 moles NaOH

moles HCl = 0.08 * 1 / 1

= 0.08 moles of HCl

Volume of HCl = 20 mL / 1000 = 0.02 L

M ( HCl ) = n / V

M = 0.08 / 0.02

= 4.0 M

hope this helps!

Answer:

4.0

Explanation:

What holds calcium chloride together?A. hydrogen bonding
B. metallic bonding
C. ionic bonding
D. dipole forces
E. van der Waals forces (London dispersion forces)