Sem1 Mock ACP

Which statement is a chemical property of copper?

• It is a mineral.

• It is a liquid at 1083 °C.

• It reacts with nitric acid.

• It is malleable and ductile.

What is the number of atoms in three grams of gold?

• 9.17 × 10²¹

• 2.29 × 10²²

• 6.02 × 10²³

• 1.806 × 10²⁴

When the equation is balanced, what is the coefficient of SnCl ₂ ?

• 2

• 3

• 4

• 6

Tags

NGSS.HS-PS1-7

Find the percent composition by mass of lithium in lithium chloride (LiCl).

• 15%

• 16.4%

• 19.6%

• 83.6%

Gold is classified as a pure substance. Which of its properties supports this classification?

• Gold occurs in nature as a solid.

• Gold is resistant to rust and tarnish.

• Gold has a high melting point.

• Gold is made of one kind of atom.

What is the formula of calcium permanganate?

• CaMnO ₄

• Ca ₃ MnO ₄

• Ca ( MnO ₄ ) ₂

• Ca ₃ ( MnO ₄ ) ₃

Which statement correctly characterizes a property of the alkaline earth elements, Group 2A on

the Periodic Table?

• They are found in nature as free elements.

• They readily lose two valence electrons.

• Their electron configuration ends with s¹.

• They have an oxidation state of +1.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

The Electron Sea Model explains why metals —

• are excellent conductors

• are very reactive

• accept electrons easily

• form ionic compounds

Matter can exist as a solid, a liquid or a gas. The solid state is distinguished by its ability to —

• be easily compressible

• take the shape of a container

• have particles of low density

• maintain an ordered pattern

What is the name of the molecular compound with the formula P₂O₅?

• Pentaphosphorus dioxide

• Decaphosphorus pentoxide

• Diphosphorus pentoxide

• Diphosphorus monoxide