CHEMISTRY HIGH SCHOOL

Which of the following is not true of "concentration"?a. It increases when you add more solute to the solvent.
b. It decreases when you add more solute to the solvent.
c. It decreases when you add more solvent to the solution.

Answers

Answer 1
Answer: The correct answer is B. The concentration of a solution does not decreases when you add more solute to the solvent. Instead, the concentration increases. Concentration is expressed as the amount of solute per unit of solvent. Therefore, increasing the solute, increases this value and increasing the solvent, decreases this value.

Related Questions

A). Polonium is a rare element with 33 radioisotopes. The most common one, 210Po, has 82 protons and 128 neutrons. When 210Po decays, it emits an alpha particle, which is a helium nucleus (2 protons and 2 neutrons). 210Po decay is tricky to detect because alpha particles do not carry very much energy compared to other forms of radiation. They can be stopped by, for example, a sheet of paper or a few inches of air. That is one reason that authorities failed to discover toxic amounts of 210Po in the body of former KGB agent Alexander Litvinenko until after he died suddenly and mysteriously in 2006. What element does an atom of 210Po change into after it emits an alpha particle? b). Some undiluted acids aremore corrosive when they are diluted with water. That is why laboratory workers are told to wipe acid splashes with a towel before washing with a copious amounts of water. Explain.
All fossil fuels contain this element. iron hydrogen copper magnesium
Catalysts affect the chemical reactions that take place within the body. What function do catalysts perform in chemical reactions?a. Catalysts slow down the rate of chemical reactions. b. Catalysts are always formed by chemical reactions. c. Catalysts are used up during a chemical reaction. d. Catalysts lower the activation energy of a chemical reaction
Which elements are included in Group 5A?
An ionic solid is placed in a beaker of water. Which of the following occurs when there is a strong attraction between the solute and the solvent?A. The solute melts.B. The solute dissolves.C. The solute remains intact.D. The solute reacts to form a precipitate.

Write the proper word equation to express the following chemical reaction: 4Fe (s) + 3Sn(NO3)4 (aq) Imported Asset 4Fe(NO3)3 (aq) + 3Sn

Answers

The proper word equation  for

 4Fe + 3Sn(NO3)4  = 4Fe(NO3)3 + 3Sn  is as below

Iron + Tin (iv) nitrate =  iron(iii) nitrate + Tin

  iron displaces  tin from it compound ( Tin (iv) nitrate to form iron (iii) nitrate and tin.

from the equation above 4 moles of Fe  displaces  3 moles of Sn(NO3)4 to form 4 moles of Fe(NO3)3 and  3 moles of SN

What mass of sodium carbonate is required to prepare 2.00 l of 0.250 M Ma2CO3 solution

Answers

Molar mass Na₂CO₃ = 106.0 g/mol

M(Na₂CO₃) =  molarity x volume x molar mass

M(Na₂CO₃) = 0.250 x 2.00 x 106.0

M (Na₂CO₃) = 53 g 

hope this helps!

determine the ionic characteristics of this element. element number of electrons in outer energy level electrons can receive valence (incl. or -) oxygen

Answers

Answer: The ionic characteristic of oxygen is that it tends to gain 2 electrons and form anions with a charge of -2 in order to achieve a stable electron configuration.

Explanation:

How many moles of ca(oh)2 are in 25ml of 1.5 M solution?

Answers

Molar concentration is

C=(\eta)/(V)

[V]=Liters

[\eta]=mol

\eta=C*V

V=25~mL=0.025~L

\eta=1.5*0.025

\boxed{\boxed{\eta=0.0375~moles}}

What category of elements does krypton gas belong to?A. metals
B. metalloids
C. non-metals

Answers

The correct answer is C. Non-metals

Explanation:

Krypton is one of the 118 chemical elements that have been identified. Krypton's main characteristics include lack of odor, color, and low reactivity, due to this, this element is classified as a noble gas and in the periodic table is part of the Group 18. Moreover, Krypton is part of the non-metals category that includes elements with low density, melting/boiling point, and conductivity, which are all features exhibit by Krypton as this has low electricity and heat conductivity, low density, low melting point (around -157 °C) and low boiling point (-153 °C). Thus, the category Krypton gas and in general Krypton belongs to is non-metals.

An element is a pure substance made up of only one kind of atom, each of whose nuclei contains the same amount of protons. A substance whose atoms all contain the same number of protons is said to constitute an element; alternatively, all the atoms of a certain element must contain the same number of protons. Here 'Kr' is a non-metal. The correct option is C.

The elements that absorb or gain electrons to generate negative ions are known as non-metals. In their outermost shell, non-metals often have 4, 5, 6, or 7 electrons. High electronegativities are seen in non-metals. This indicates that non-metal atoms exhibit a significant propensity to attract more electrons than they would ordinarily have.

Krypton is a Group 18 rare gas and chemical element with the atomic number 36 and the symbol Kr.

Thus the correct option is C.

To know more about non-metals, visit;

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When electrons jump off, They (scientific term)



Will give brainliest

Answers

Answer:

When an electron is hit by a photon of light, it absorbs the quanta of energy the photon was carrying and moves to a higher energy state. This higher energy state is to imagine that the electron is now moving faster, (it has just been "hit" by a rapidly moving photon) Electrons therefore have to jump around within the atom as they either gain or lose energy

Explanation:

They gain or lose energy.

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