Rates of Reaction

What is activation energy?

• The minimum amount of energy particles must have for a reaction to take place

• The amount of energy released during a chemical reaction

Tags

NGSS.HS-PS1-4

True or false? The mean rate of reaction can be found by measuring the amount of reactant used over a period of time.

• true

• false

If we used 30g of small marble chips rather than 1x 30g chunk of marble the rate of the reaction...

• The rate of reaction will decrease.

• The rate of reaction will increase.

• The rate of the reaction will be the same.

What is the equation for calculating rate of reaction?

• amount of reactant used divided by time taken

• amount of product formed divided by time taken

• Both these are correct

What does a horizontal (flat line) on a reaction graph tell us?

• Reaction in slowing down

• Reaction is speeding up

• Reactant has been used up

Tags

NGSS.HS-PS1-5

List 2 different ways we can measure the rate of reaction.

What is the relative charge of an electron?

• negative charge -1

• positive charge +1

• Neutral

How many protons, neutrons & electrons does sodium have?

• 11 protons, 23 neutrons & 11 electrons

• 23 protons, 11 neutrons & 12 electrons

• 11 protons, 12 neutrons & 11 electrons

Which group in the periodic table are known as the noble gases?

• Group 0

• Group 7

• Group 1

• Group 2