Modeling Conservation of Mass Review

How many of each type of atom are in the chemical formula NH₃?

• 1 nitrogen, 3 hydrogen

• 3 nitrogen, 3 hydrogen

• 1 neon, 3 hydrogen

• 1 nitrogen, 3 helium

Tags

NGSS.MS-PS1-1

"Matter cannot be created or destroyed" describes which of the following?

• Law of attraction

• Law of superposition

• Law of conservation of energy

• Law of conservation of matter

Tags

NGSS.MS-PS1-5

How many of each type of atom are in the following chemical formula: 4NO₂ ?

• 4 nitrogen, 2 oxygen

• 4 nitrogen, 6 oxygen

• 4 nitrogen, 8 oxygen

• 8 nobelium

Tags

NGSS.MS-PS1-1

The number and type of atoms of reactants is equal to the number and type of atoms of products describes which of the following?

• Balanced chemical equation

• Law of conservation of energy

• Equal mass equation

• Unbalanced chemical equation

Tags

NGSS.MS-PS1-5

How many atoms of Sodium (Na) are in the products & reactants of this reaction?

MgCl2 + 2NaF → MgF2 + 2NaCl

• 3 in the reactants, 1 in the products

• 2 in the reactants, 1 in the products

• 2 in the reactants, 2 in the products

Tags

NGSS.MS-PS1-1

NGSS.MS-PS1-5

The Law of Conservation of Matter proves that.....?

• The same number of each type of atom will always be present before and after a chemical reaction takes place.

• Some of the atoms present before the reaction will always be lost during a chemical reaction, or turn into a larger molecule.

• Some of the atoms will always be changed into a different type of atom by a chemical reaction.

• Atoms of different elements than in the reactants can be in the products of a chemical reaction.

Tags

NGSS.MS-PS1-5

To prevent the loss of something

• Chemical reaction

• Mass

• Atom

• Conserve

Tags

NGSS.MS-PS1-5

How much does a 5 gram Hershey's kiss weigh after it is melted in the microwave?

• 5 grams
• 3 grams
• 7 grams

Tags

NGSS.MS-PS1-4

NGSS.MS-PS3-4

If reaction starts with 20g of reactants it should produce... 

• a total of 40g of product
• a total of 10g of product
• a total of 80 g of product
• a total of 20g of product

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Does the reaction above correctly demonstrate the law of conservation of matter?

• Yes, there is the same number of each type of atom in the reactants as in the products.

• No, the products have one less Nitrogen atom and one more Hydrogen atom, than the reactants.

• No, the products have more mass.

• Yes the reactants have more mass

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5