CHEMISTRY HIGH SCHOOL

An Arrhenius acid has(1) only hydroxide ions in solution
(2) only hydrogen ions in solution
(3) hydrogen ions as the only positive ions in solution
(4) hydrogen ions as the only negative ions in solution

Answers

Answer 1

Answer:

Answer: (3) hydrogen ions as the only positive ions in solution

Explanation: Arrhenius acids are substances which dissociate in water to give $H^+$ ions.

For example: $HCl$ is an Arrhenius acid.

$HCl\rightarrow H^++Cl^-$

Arrhenius bases are substances which dissociate in water to give $OH^-$ ions.

For example: $NaOH$ is an Arrhenius base.

$NaOH\rightarrow Na^++OH^-$

Answer 2

Answer: The answer is (3) hydrogen ions as the only positive ions in solution. One ionic compound must have positive ion and negative ion at the same time. The Arrhenius base has hydroxyl ion as only negative ions in solution.

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If solving for the slope of the best fit line it is a good choice to choose the points closest to the line or points on the line.T OR F?

Answers

This is true because the most accurate slope of the line would be given by the points that either reside on the line or close to it.

True or false: The elements in a group of the periodic table have similar characteristics

Answers

False each one has its own unique in its own way

An ice cube is placed on a kitchen counter. Which best describes heat flow in this situation

Answers

Answer:

D: Heat flows from the counter to the ice, causing the molecules in the counter to move more slowly.

Explanation:

Answer: D

Explanation:

edge

3. Rank each of the following in order of DECREASING atomic radius
a. Cl, Br, Ga

Answers

Answer:

Br,Ga,Cl?

Explanation:

How many protons and electrons are in an atom of sodium whose atomic number is 11?

Answers

Atomic number is also known as proton number, so it would have 11 protons. Assuming you mean a neutral atom, it will have to have an equal number of electrons to protons, so it has 11 electrons too

Final answer:

An atom of sodium, with an atomic number of 11, has 11 protons and 11 electrons. The atomic number is indicative of both the number of protons in an atom and, in a neutral atom, the number of electrons.

Explanation:

The atomic number of an element corresponds to the number of protons in the nucleus of its atom. So, an atom of sodium whose atomic number is 11 has 11 protons. As the atom is neutral, it also means that the atom will have 11 electrons to balance the 11 positive charges of the protons. This information can be found on the periodic table, which gives the atomic number and the atomic mass of each element.