Basic Multi-Step Problems

Using the balanced equation in question 1,
Mg(s)   +   HCl(aq)  -->   MgCl₂(aq)   +   H₂(g)
How many grams of HCl are consumed by the reaction of 2.50 moles of magnesium?

• 5.00 g

• 7.29

• 182 g

• 218 g

Tags

NGSS.HS-PS1-7

How many moles of hydrogen, H₂, are needed to react with 2.00 mol of nitrogen, N₂?

• 2.00

• 1

• 3

• 6

Tags

112.43.c.9.C

A car travels 150 km in 3 hours. What is the average speed of the car?

• 50 km/h

• 45 km/h

• 60 km/h

• 55 km/h

If a solution has a pH of 3, what is its hydrogen ion concentration?

Which of the following is a chemical change?

• Melting of ice

• Boiling of water

• Rusting of iron

• Breaking of glass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

What is the acceleration of an object if a force of 10 N is applied to a mass of 2 kg?

• 5 m/s²

• 10 m/s²

• 20 m/s²

• 2 m/s²

Tags

NGSS.MS-PS2-2

In an experiment, a student measures the temperature of a liquid as 25°C. What is this temperature in Kelvin?

• 298 K

• 273 K

• 250 K

• 300 K

Which gas law explains the relationship between the pressure and volume of a gas at constant temperature?

• Boyle's Law

• Charles's Law

• Avogadro's Law

• Ideal Gas Law

What is the main function of the mitochondria in cells?

• Protein synthesis

• Energy production

• Photosynthesis

• Cell division

Tags

NGSS.MS-LS1-2

A pendulum swings back and forth. What type of energy is at its maximum at the highest point of the swing?

• Kinetic energy

• Thermal energy

• Potential energy

• Sound energy

Tags

NGSS.MS-PS3-2