Which of the following equations is balanced? $$H_2 + O_2 \rightarrow H_2O$$ , $$2H_2 + O_2 \rightarrow 2H_2O$$ , $$H_2 + 2O_2 \rightarrow 2H_2O$$ , $$2H_2 + 2O_2 \rightarrow 2H_2O$$

$$2H_2 + O_2 \rightarrow 2H_2O$$

Why does atomic radius decrease across a period?

Increased nuclear charge pulls electrons closer

Which of the following is the correct balanced equation for the reaction of aluminum with hydrochloric acid? Options: $$Al + HCl \rightarrow AlCl_3 + H_2$$ , $$2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2$$ , $$Al + 3HCl \rightarrow AlCl_3 + 3H_2$$ , $$2Al + 3HCl \rightarrow 2AlCl_3 + 3H_2$$

$$2Al + 6HCl \rightarrow 2AlCl_3 + 3H_2$$

Which of the following is the correct balanced equation for the combustion of methane ( $$CH_4$$ )? Options: $$CH_4 + O_2 \rightarrow CO_2 + H_2O$$ , $$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$$ , $$2CH_4 + O_2 \rightarrow 2CO_2 + 2H_2O$$ , $$CH_4 + O_2 \rightarrow CO + H_2O$$

$$CH_4 + 2O_2 \rightarrow CO_2 + 2H_2O$$

Why are alkali metals highly reactive?

They have one electron in their outer shell

Relationship between pH and hydrogen ion concentration.

As pH increases, $$[H^+]$$ decreases.

Which of the following is a correct statement about the periodic table?

Elements in the same group have the same number of valence electrons

Which of the following is the correct balanced equation for the reaction of calcium with water? Options: $$Ca + H_2O \rightarrow CaO + H_2$$ , $$Ca + 2H_2O \rightarrow Ca(OH)_2 + H_2$$ , $$2Ca + 2H_2O \rightarrow 2Ca(OH)_2 + H_2$$ , $$Ca + H_2O \rightarrow Ca(OH)_2 + 2H_2$$

$$Ca + 2H_2O \rightarrow Ca(OH)_2 + H_2$$

Based on Boyle’s law, what happens to the volume of LeGarrette’s lungs as pressure increases while scuba diving?

volume of the lungs would decrease

Chemistry Final Flashcards

Student preview

39 questions

Show all answers

1.

FLASHCARD QUESTION

Front

What is the center of an atom called?

Back

Nucleus

2.

FLASHCARD QUESTION

Front

Which subatomic particle has a negative charge?

Back

Electron

3.

FLASHCARD QUESTION

Front

What is the atomic number of carbon?

Back

6

4.

FLASHCARD QUESTION

Front

Which element is located in Group 1, Period 2 of the periodic table?

Back

Lithium

5.

FLASHCARD QUESTION

Front

What is the chemical symbol for sodium?

Back

Na

6.

FLASHCARD QUESTION

Front

Which of the following is a chemical change? Melting ice, Dissolving sugar in water, Burning wood, Breaking glass

Back

Burning wood

7.

FLASHCARD QUESTION

Front

What is the atomic weight of Silver (AG)?

Back

107.07U

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