Ammonia is a weak base because it produces ___ ions in solution

Answers

Answer 1

Answer: only a few ions (in comparison to others that totally break apart)

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A ________ ion is created when an electron is removed.a. stable
b. neutral
c. positive
d. negative

Answers

Answer: The correct answer is Option c.

Explanation:

Ions are formed when an atom looses or gains electrons.

If an atom gains electrons, it leads to the formation of negative ions known as anions. For Example: Fluorine gains 1 electron to form $F^-$ ions.

If an atom looses electrons, it leads to the formation of positive ions known as cations. For Example: Sodium looses 1 electron to form $Na^+$ ions.

Hence, the correct answer is Option c.

A ________ ion is created when an electron is removed.

a. stable
b. neutral
c. positive
d. negative

A cation or positive ion is created when an electron is removed. The answer is letter C.

Carvone is a substance that occurs in two forms having different arrangements of the atoms but the same molecular formula (c10h14o) and mass. one type of carvone gives caraway seeds their characteristic smell, and the other type is responsible for the smell of spearmint oil. calculate the mass percent of each element in carvone.

Answers

The molecular mass of Carvone is calculated as;

= 12 (C)₁₀ + 1.008 (H)₁₄ + 16 (O)

= 120 + 14.112 + 16

= 150.112

%age of Carbon;

= (120 ÷ 150.112) × 100

= 79.94 %

%age of Hydrogen;

= (14.112 ÷ 150.112) × 100

= 9.40 %

%age of Oxygen;

= (16 ÷ 150.112) × 100

= 10.65 %

Which aqueous solution has the lowest boiling point? A.0.20 m (NH4)2S
B. 0.20 m FeI3
C. 0.20 m K2SO4
D. 0.20 m C2H5OH

Answers

Answer:- D. 0.20 m $C_2H_5OH$

Explanations:- When a on volatile solute is added to a solvent then the boiling point of the solution increases(elevated) and we call it elevation in boiling point.

Elevation in boiling point is directly proportional to the molality of the solution and the Van't Hoff factor "i" which is the number of ions we get on dissociation.

The equation is written as:

$\Delta T_b=imk_b$

where $k_b$ is the boiling point elevation constant.

We have all the aqueous solutions, so the boiling point elevation constant value will remain same for all of them. The molality for all the solutions is also same. So, elevation in boiling point will depend only on the value of Van't Hoff factor.

Lower is the value of "i", lower will be the boiling point and vice versa.

The question asks, which aqueous solution has the lowest boiling point. So, we nede to choose the one with the lowest value of "i".

$(NH_4)_2S(aq)\rightarrow 2NH_4^+(aq)+S^2^-(aq)$

i = 3

$FeCl_3(aq)\rightarrow Fe^3^+(aq)+3I^-(aq)$

i = 4

$K_2SO_4(aq)\rightarrow 2K^+(aq)+SO_4^2^-(aq)$

i = 3

$C_2H_5OH$ is a covalent molecule and so it does not dissociate to give the ions and hence the value of "i" for this is 1.

Comparing the "i" values for all the solutions, the least value is for ethyl alcohol means the boiling point of 0.20 m ethyl alcohol solution will be lowest.

So, the correct answer is D. 0.20 m $C_2H_5OH$ .

When one compound dissolves in water, the only positive ion produced in the solution is H3O+(aq). This compound is classified as(1) a salt
(2) a hydrocarbon
(3) an Arrhenius acid
(4) an Arrhenius base

Answers

Answer : The correct option is, (3) an Arrhenius acid

Explanation :

According to the Arrhenius concept, an acid is a substance which ionizes in the water to give hydronium ion $(H_3O^+)$ or hydrogen ion $(H^+)$ and a base is a substance which ionizes in the water to give hydroxide ion $(OH^-)$ .

When one compound dissolves in water, then only positive ion produced in the solution is $(H_3O^+)$ . This compound is classified as an Arrhenius acid.

Hence, the correct option is, (3) an Arrhenius acid

When one compound dissolves in water, the only positive ion produced in the solution is (aq). This compound is classified as an Arrhenius acid.

How many moles of I2 will form 3.58 g of NI3?

Answers

1. The balanced chemical reaction is:

N2 +3 I2 = 2NI3

We are given the amount of product formed. This will be the starting point of our calculations.

3.58 g NI3 ( 1 mol NI3 / 394.71 g NI3 ) ( 3 mol I2 / 2 mol NI3 ) = 0.014 mol I2.

Thus, 0.014 mol of I2 is needed to form the given amount of NI3.

A particle has 5 protons, 6 neutrons, and 5 electrons. What is its net charge.

Answers

It would have a zero charge because it is a neutral atom. The number of electrons which is a negative charge is equal to the number of protons which is positive, they will cancel each other out hence meaning it will become neutral

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