Unit 2 game for Assessment

If I put 10 grams of dried yeast in a bowl, and I add 30 grams of water to it, it would start bubbling and a gas would form. After this reaction, what will be the total mass inside the sealed bowl?

• 20 grams

• 30 grams

• 40 grams

• 80 grams

What does the Law of Conservation of Mass state?

• Energy cannot be created nor destroyed

• The total mass of the reactants equals the total mass of the products.

• The total mass of the products is always greater than the reactants.

• If heat is released, the product's total mass will be less.

Adding colored dye to a white t shirt yields which type of reaction?

• chemical

• plasma

• Heterogeneous

• physical

Which is a physical property of matter?

• shape of an object

• density of the object

• boiling and melting points of a substance

• all of these

Which is NOT a chemical property of matter.

• Boiling Point

• Combustibility

• reactivity

• toxicity

 When paper burns in a fire, it seems like the mass decreases because the paper turns to ash. According to the Law of Conservation of Mass, what really happens to the "missing" mass?  

• It is destroyed during the burning process

• It is changed into gases that escape into the atmosphere

• It disappears and no longer exist.

• It is absorbed into the ash.

If a dog weighs 66 pounds on earth, what would the dog weigh on the moon?

• 11 pounds

• 66 pounds

• 33 pounds

• 6 pounds

If a car had a mass of 1,000 kg, and half of it turns to rust, what is the total mass of the car and the rust?

• 2,500 kg

• 10,000 kg

• 1,000 kg

• 166.66kg

What is the chemical formula for this molecule/compound?

• CO2

  
  

• CH4

• H2O

Which is a pure substance?

• sugar or salt

• water

• diamonds

• sulfer

• all of these