Which of the following is not a colligative property of a solution?a. boiling point elevation
b. density
c. vapor pressure lowering
d. freezing point depression

Answers

Answer 1

Answer: The correct answer is (b.) density. Colligative properties are more concerned about the ratio between the number of particles of the solute and solvent in rather than the type of chemical or element present. Since boiling point elevation, vapor and osmotic pressure lowering and freezing point depression are considered as one of the colligative properties, it is definitely the density that does not belong to the group.

Answer 2

Answer:

Answer:

B. Density

Explanation:

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Solutions of aluminum nitrate and sodium sulfate react to form sodium nitrate and aluminum sulfate. Classify this reaction.2Al(NO3)3(aq) + 3Na2SO4(aq) → Al2(SO4)3(s) + 6NaNO3(aq)
A) Synthesis
B) Decomposition
C) Double Replacement
D) Single Replacement
I choose C was wondering if I was correct

Answers

C is the correct answer. Double displacement reaction, also called as metathesis, is a type of reaction wherein two compounds react to form new compounds. This case the cations and the anions of the reactants replace each other forming the new compounds.

Answer:

C: Double Replacement

Explanation:

What is a single kind of matter that is pure, having a specific makeup and specific properties? a) Element b) Compound c) Mixture d) Substance

Answers

Answer:

Element

Explanation:

Final answer:

A Substance, either an element or compound, is a single kind of matter that is pure, having a consistent makeup and specific properties. Elements consist of a single type of atom while compounds consist of two or more types of atoms.

Explanation:

The single kind of matter that is pure, having a specific makeup and specific properties is termed as a Substance. A substance can be classified as an element or a compound. Elements consist of only one type of atom and cannot be broken down by a chemical change. On the other hand, compounds consist of two or more types of atoms. It's essential to note that both elements and compounds have a constant composition from point to point, but mixtures don't necessarily maintain the same composition throughout.

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Summarizes the relationship between dehydration reactions and hydrolysis

Answers

Explanation:

Dehydration reaction is removal of water from a specie to give 2 distinct molecules. Dehydration reactions are common processes, the reverse of a hydration reaction. Examples of dehydrating agents are: sulfuric acid, alumina etc.

Hydrolysis reaction is the reaction of water molecules with a large molecule. Sometimes, this addition causes both substance and water molecule to split into two products, reactions like this, one fragment of the parent molecule gains a hydrogen ion.

The difference between dehydration synthesis and hydrolysis is that in one, bonds are being formed, while in the other bonds are being destroyed. In dehydration reaction, molecules are bonded together by removing water while in hydrolysis, water is added to the molecules in order to dissolve complex bonds.

Why is the radius of a positive ion always less than the radius of its neutral atom? (A) the nucleus pulls the remaining electrons in closer.(B) The number of principal energy levels is always reduced. (C) The atomic orbitals contract all by themselves (D) Electron speeds are reduced

Answers

The radius of a positive ion always less than the radius of its neutral atom because the nucleus pulls the remaining electrons in closer.

What is an atom ?

Each atom is made up of a nucleus and one or more electrons that are linked to it. One or more protons and a significant number of neutrons make up the nucleus.

Only the most prevalent kind of hydrogen is neutron-free. The smallest component of ordinary stuff that makes up a chemical element is an atom.

Quarks and electrons are the two categories of fundamental particles that make up an atom. An atom's nucleus is surrounded by an area of electrons. The electrical charge of every electron is negative one.

Protons and neutrons, which together make up an atom's nucleus, are made of quarks.

Thus, option A is correct.

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Positive ions are positive because they have lost electrons.
(A)-This sounds accurate, but is actually not true. When an atom loses an electron and forms a positive ion, there will be less negative charge from the electrons to attract the positively charged nucleus. Losing electrons will actually decrease the attraction between the electrons and the nucleus.
(B)-This is true in some cases, but not all. If, for example, sodium were to lose an electron, it would drop down to having its largest orbital being in the second energy level, and would decrease in size. If magnesium were to lose an electron, it would still have one electron in the third energy level, so it wouldn't drop down an energy level.
(C) and (D)-Not sure where these answers even came from.

The actual reason behind the radius of a positive ion being smaller than the radius of its neutral atom is that the repulsive force between the electrons themselves is decreased, causing them to move closer together.

Which of these equations is balanced? A. H2O+Co ---> H2Co3 B. 2NaCl +H2SO4 ----> Na2SO4 + 2HCl C. 2CaO+ H2O ----> Ca(OH)2 D. Mn +Fe ----> MnS + Fe

Answers

Answer is: B. 2NaCl +H2SO4 ----> Na2SO4 + 2HCl.

According to principle of mass conservation, number of atoms must be equal on both side of balanced chemical reaction.

There are two sodium atoms, two chlorine atoms, two hydrogen atoms, one sulfur atom and four oxygen atoms on both side of balanced chemical reaction.

A) This reaction is not balanced, because number of oxygen atoms are not the same.

C) This reaction is not balanced, because number of oxygen and calcium atoms are not the same.

D) This reaction is not balanced, because number of sulfur atoms are not the same.

The equatin that is balanced is 2NaCl + H2SO4 → Na2SO4 + 2HCl. The answer is letter B. The reactant has two Na, 2 Cl, 2 H, 1 S and 4 O. These number of atoms is also the same for the product side.

Choose the correct equation to represent the following statement (unbalanced chemical equation):Aluminum reacts with hydrochloric acid to yield aluminum chloride and hydrogen.

A. AlCl3 + H2 Al + HCl
B. Al + HCl AlCl3 + H2
C. Al HCl + AlCl3 + H2
D. Al + HCl AlCl3 + H2O