Topic 4: Modeling Conservation of Mass

There are 2 g worth of products in a chemical reaction. How many were needed in the reactant stage

• 2 g

• 13 g

• 6.5 g

• 8 g

What does Law of Conservation say about matter

• That the amount of matter changes in a chemical reaction.

• That the amount of matter doubles in a chemical reaction.

• That the amount of matter stays the same in a chemical reaction.

• That the amount of matter halves in a chemical reaction.

What happens to the number of atoms as it goes through a chemical reaction

• Doubles

• Changes

• Stays the same

Tags

NGSS.MS-PS1-5

When a reaction produces a gas, does the reaction overall lose mass

• No the mass is still in the solid

• No the mass is conserved in the gas

• Yes the mass will go down when the gas leaves

• Yes the mass will go up when the gas leaves

If 45g of reactants go through a reaction how much product will be produced?

• 20g

• 15g

• 35g

• 45g

In this chemical equation , CH₄ and 2O₂ are called the...

• Products

• Reactants

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-2

In this chemical equation , CO₂ and 2H₂O are called the...

• Products

• Reactants

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

In this chemical equation , the 2 in front of the 2O₂ and the 2 in front of the 2H₂O are called the...

• Products

• Reactants

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-5

In this chemical equation ,the small numbers dropped down below the letters like the 4 in CH₄ are known as the

• Products

• Reactants

• Coefficient

• Subscript

Tags

NGSS.MS-PS1-1

If you have 15 grams of Baking Soda and 20 grams of Vinegar as products, what would you expect the mass of your reactants to be?

• 15 grams

• 20 grams

• 5 grams

• 35 grams

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5