Using the graph below, which of the following is a gas?
a
Ce2(SO4)3
b
NaNO3
c
KCl
d
NaCl
Question 21
How many valence electrons are in the element, oxygen?
a
2
b
3
c
6
d
4
Question 22
What makes a compound an acid?
a
It dissolves into Hydrogen ions in water (H+ and H3O+)
b
It has a pH higher than 7
c
It dissolves into Hydroxide ions in water (OH-)
d
It cannot be mixed with oil
a. It dissolves into Hydrogen ions in water (H+ and H3O+)
Using the graph provided, we cannot determine which of the given compounds is a gas as the graph is not provided.
To answer question 21, the element oxygen has 6 valence electrons.
To answer question 22, an acid is a compound that dissolves into hydrogen ions (H+) and/or hydronium ions (H3O+) in water, so the correct option is a. It dissolves into Hydrogen ions in water (H+ and H3O+).
To determine which of the given compounds is a gas, we can refer to the graph provided. However, since the graph is not mentioned in the question, we cannot use it to answer the question accurately. Therefore, we need additional information or context to answer this question.
To determine the number of valence electrons in the element oxygen, we can refer to the periodic table. Oxygen is located in Group 16, so it has 6 valence electrons. Therefore, the answer is option c - 6.
To determine what makes a compound an acid, we need to consider its behavior in water. An acid is a compound that dissolves into hydrogen ions (H+) or hydronium ions (H3O+) in water. This is represented as the process of ionization or dissociation. Therefore, the correct answer is option a - It dissolves into hydrogen ions in water (H+ and H3O+).