Chemistry Junior

Which factors increase the rate of a reaction?

• increasing temperature

• increasing concentration

• increasing surface area

• all of these

Tags

NGSS.HS-PS1-5

NGSS.HS-PS1-6

Which of the following increase the reaction rate?

• less surface area

• lower temperature

• increased concentration

Tags

NGSS.HS-PS1-5

Why does breaking up a solid reactant increase the rate of reaction?

• it creates more solid
• it creates more energy
• it increases the surface area
• it increases the concentration

A chemical that changes the rate of a reaction but is not used up in the reaction is called a ...

• Catalyst

• Product

• Reactant

• Indicator

Tags

NGSS.HS-PS1-5

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

An electron is

• positively charged

• neutral

• negatively charged

Tags

NGSS.MS-PS2-3

atomic number is

• the number of protons

• the number of electrons

• the number of neutrons

• the location of an atom on the periodic table

Atomic Mass is the number of

• protons and neutrons in the nucleus of an atom

• protons and electrons in the nucleus of an atom

• neutrons and electrons in the nucleus of an atom

The type of reaction that releases energy as heat is called

• endothermic

• exothermic

• respiration

• photosynthesis

Tags

NGSS.HS-PS1-4

To neutralise an acid you add a

• acid

• base

• Ph indicator

• equal amount of water

Tags

NGSS.MS-PS1-5