Flashcard on Photosynthesis and Chemical Reactions

Front

The balanced equation for the production of sugars by photosynthesis demonstrates the law of conservation of mass because:

Back

There is the same number of each type of atom on the right side of the equation as the left.

Front

What is true about the mass of reactants in a chemical reaction?

Back

The total mass of the reactants in a chemical reaction will always be equal to the total mass of the products.

Front

What happens to the total mass of the atoms involved in a chemical reaction?

Back

It will stay the same no matter how the atoms are rearranged.

Front

Why is the number 2 present in front of lithium (Li) on the reactants side of the chemical equation with sulfur (S)?

Back

To show the number of lithium atoms involved in the reaction.

Front

Look at the equation below. Which shows the equation balanced? Options:

A

,

B

,

C

,

D

Back

C

Front

Which of the following equations is balanced correctly? Options:

A

,

B

,

C

,

D

Back

C

Front

Why does Alex’s equation better represent the reaction?

Back

The number of oxygen atoms is the same before and after the reaction.

Front

In atomic theory, new substances are formed when the atoms of other substances are rearranged. In this kind of change, the total number of atoms is conserved. Which statement is true of the rearrangement of atoms?

Back

The amount of matter is conserved.

Front

How many nitrate ions are in the products and the reactants of the chemical equation Ba(NO₃)₂ + 2LiOH → Ba(OH)₂ + 2LiNO₃?

Back

Two in the reactants and two in the products.

Front

The diagram below shows the reaction of oxygen gas and hydrogen gas to form water. The chemical reaction shown above takes place in a closed system. What is true about the system while the reaction occurs?

Back

The total mass of the system stays the same.