Basic Multi-Step Problems

Using the balanced equation in question 9, C₂H₂(g) + O₂(g) --> CO₂(g) + H₂O(g) How many moles of water (H₂O) are produced when 25.0 grams of C₂H₂ are consumed?

• 0.960 moles

• 0.480 moles

• 1.92 moles

• 3.84 moles

Tags

NGSS.MS-PS1-5

2Al + 3H₂SO₄ -> Al₂(SO₄)₃ + 3H₂
How many grams of aluminum sulfate would be formed if 250g H₂SO₄ completely reacted with aluminum?

• 0.85 g

• 290 g

• 450 g

• 870 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

2Na + 2H₂O → 2NaOH+ H₂
How many grams of hydrogen are produced if 120 g of Na are available?

• 5.2 g

• 2.6 g

• 690 g

• 45 g

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• 50 km/h

• 60 km/h

• 70 km/h

• 80 km/h

Tags

NGSS.MS-PS3-1

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

What is the acceleration of a 5 kg object if a force of 20 N is applied to it?

• 2 m/s²

• 3 m/s²

• 4 m/s²

• 5 m/s²

Tags

NGSS.MS-PS2-2

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 main gas found in the air we breathe?

• Oxygen

• Carbon Dioxide

• Nitrogen

• Hydrogen

Which planet is known as the Red Planet?

• Earth

• Mars

• Jupiter

• Venus

What is the chemical formula for table salt?