compounds/chemical reactions

What reaction has the following general formula:

A + B --> AB

• Synthesis

• Decomposition

• Single Replacement

• Double Replacement

• Combustion

Which of the following is an element?

• potassium chloride (KCl)

• water (H₂O)

• carbon (C)

• calcium carbonate (CaCO₃)

Which is an example of a physical change?

• Burning wood
• Freezing water
• Rust on a car
• Cooking food

Tags

NGSS.MS-PS1-4

Changing the state of water from ice melting into water is a

• catalyst

• physical change

• chemical change

• Precipitate

Tags

NGSS.MS-PS1-4

Determine whether the following equation is balanced or unbalanced. 2Fe + 3Cl₂ ---> FeCl₃

• Balanced

• Unbalanced

Tags

NGSS.MS-PS1-5

The substances at the end of a chemical reaction

• product

• reactant

• change

• precipitate

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

The number written next to an element in the bottom corner

• subscript

• catalyst

• chemical change

• temperature

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

• 4 atoms
• 10 atoms
• 1 atom
• 5 atoms

Tags

NGSS.MS-PS1-5

NGSS.MS-PS1-2

Which of the following is a compound?

• zinc (Zn)

• magnesium (Mg)

• sodium chloride (NaCl)

• potassium (K)

Tags

NGSS.MS-PS1-1

In this image, what are the information to the right of the arrow (in black) is called the_______.

• Product
• Reactant
• Chemical Subscript

Tags

NGSS.MS-PS1-2