Question

How many different elements make up beryllium sulfite, BeSO3?

1

3

4

5
Question at position 16
16

Multiple Choice
1 point



Question at position 16

Dichlorosilane is a compound that contains silicon (Si), hydrogen (H), and chlorine (Cl) atoms. It has the chemical formula SiH2Cl2. How many chlorine atoms does dichlorosilane contain?


Each molecule contains two chlorine atoms.

Each molecule contains three atoms.

Each molecule contains five different elements.

Each molecule contains four chlorine atoms.
Question at position 17
17

Multiple Choice
1 point



Question at position 17

Areas near oceans or large lakes tend to have more moderate climates than do areas far from large bodies of water. Which of these statements best explains this observation?

Hydrogen and oxygen atoms share electrons in a water molecule.

Lakes and oceans contain dissolved solids.

Water has a very high specific heat.

Water produces buoyant forces.
Question at position 18
18

Multiple Choice
1 point



Question at position 18

Why is water considered a polar molecule?

The molecule has no overall charge.

The oxygen and hydrogen atoms share electrons equally.

The atoms in the molecule have partial charges.

The molecule can only attract positive charges.

Answer 1

1) 3 — BeSO3 contains beryllium (Be), sulfur (S), and oxygen (O).

2) Each molecule contains two chlorine atoms. — SiH2Cl2 has two Cl atoms.

3) Water has a very high specific heat. — High specific heat of water moderates temperature changes near large bodies of water.

4) The atoms in the molecule have partial charges. — Unequal sharing of electrons gives oxygen a partial negative and hydrogens partial positive charges, making water polar.