AP Chem #1 - Ch 1 and 2

Musical interments like trumpets and trombones are made from an alloy called brass. Brass is composed of copper and zinc atoms and appears homogeneous under a microscope. The approximate composition of most brass objects is a 2:1 ratio of copper and zinc. Would you classify brass as an element, compound, or a mixture?

• element

• compound

• mixture

Tags

NGSS.MS-PS1-1

Three cubes of equal mass are composed of gold (density = 19.32 g/cm³), platinum (density = 21.45 g/cm³), and lead (density = 11.35 g/cm³). Choose the option that lists the cubes from smallest to largest.

• gold, lead, platinum

• gold, platinum, lead

• platinum, gold, lead

• lead, gold, platinum

You are hiking in the mountains and find a shiny gold nugget. It might be the element gold, or it might be iron pyrite, FeS₂, or "fool's gold". Which of the following physical properties do you think would help determine if the shiny nugget is real gold?

• apperance

• density

• state of matter

• conductivity

When identifying an unknown substance, a student gathers some observations like mass, volume, density, and color. Which of these observations is considered an intensive property of the substance?

• mass

• volume

• density

• color

Which separation method is better suited for separating a solution of sugar and water into pure substances?

• filtration

• distillation

• physical removal

• chemical reaction

Calculate the kinetic energy, in joules of a 1200-kg automobile moving at 18 m/s.

• 1.5 x 10^-2 J

• 1.2 x 10³ J

• 2.2 x 10⁴ J

• 1.9 x 10⁵ J

Tags

NGSS.HS-PS3-1

Two positively charged particles are first brought close together and then released. Once released, the repulsion between particles causes them to move away from each other. This is an example of potential energy being converted into what form of energy?

• kinetic

• gravitational

• electromagnetic

• thermal

Tags

NGSS.HS-PS3-2

Take the measurement 15.7 x 10³ g out of scientific notation and into the expanded form, using the appropriate unit.

• 15.7 kg

• 15.7 mg

• 15.7 dg

• 15.7 cg

The density of titanium metal is 4.51 g/cm³ at 25^oC. What mass of titanium displaces 125.0 mL of water at this temperature?

• 27.7 g

• 564 g

• 0.0361 g

• 421 g

A bumblebee flies with a ground speed of 15.2 m/s. Calculate its speed in km/hr.

• 5.47 x 10⁴ km/hr

• 912 km/hr

• 54.7 km/hr

• 1.5 x 10⁴ km/hr