Question

1. a liquid is poured from a narrow container to a wide container. the liquid changes..

a. mass
b. shape
c. density
d. volume

1. the first letter in a properly written chemical symbol is always

a. bold faced.
b. underlined.
c. italicized.
d. capitalized.

1. which of the following is used for chemical symbols today?

a. numbers
b. letters
c. icons
d. drawings

1. which of the following represents a compound?

a. o-16
b. h₂o
c. h-3
d. h

1. the chemical formula of a compound indicates

a. the relative proportions of the elements in the compound.
b. the alchemy symbols for the elements in the compound.
c. the source of the elements in the compound.
d. how elements are joined in the compound.

Explanation:

Question 27

• Mass is the amount of matter, which doesn't change when pouring liquid.
• Density is mass per unit volume, and since mass and volume of the liquid don't change (assuming no spillage), density remains the same.
• Volume is the amount of space the liquid occupies, which also doesn't change when pouring (if no spill).
• Shape of a liquid is determined by the container, so when poured from narrow to wide, the shape changes.

Chemical symbols follow the rule that the first letter is always capitalized (e.g., H for Hydrogen, O for Oxygen), and the second letter (if present) is lowercase. Bold - faced, underlined, or italicized are not standard for the first letter of a chemical symbol.

Today, chemical symbols are made up of letters. For example, Carbon is C, Sodium is Na. Numbers, icons, or drawings are not used as chemical symbols.

Answer:

b. shape

Question 28