Chemical Equations

What is the part of a chemical equation called?
2H_{2 +} O₂ --> 2H₂O

• Reactants

• Products 

• Yields 

• Chemical Equation 

The blue numbers in the image below represent ________

• I don't know, and don't want to try

• coefficients

• subscripts

• none of the answers are correct

A way to show the number and type of elements (atoms) in a molecule or compound with a combination of symbols and numbers.

• Molecule

• Chemical formula

• Physical change

• Coefficient

Tags

NGSS.MS-PS1-1

The small number that is written below the symbol and shows how many atoms of each element is present.  

• Compound

• Molecule

• Coefficient

• Subscript

In chemical reactions, what does the principle of conservation of mass mean?

• Matter is not created or destroyed.

• The total mass of the reactants is greater than the total mass of the products.

• The total mass of the reactants is less than the total mass of the products.

• Matter is not changed.
  

Tags

NGSS.MS-PS1-5

How many total atoms are in 2C₂HO₈C_l2

• 23

• 46

• 3

• 22

Tags

NGSS.MS-PS1-1

Is the following equation balanced?
2C₂H₂ + 5O₂ --> 4CO₂ + 2H₂O

• yes

• no

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Which is the correct formula for:
 three hydrogen (H)
one sulfur (S)
four oxygen (O)

• H₃SO₄

• HSO₄

• H₄S₃O

• H₂O

Tags

NGSS.MS-PS1-1

The smallest physical unit of an element or compound (O₂ and H₂O are both examples of ONE of these)

• Physical change

• Chemical Symbol

• Yield Sign

• Molecule

Tags

NGSS.MS-PS1-1

The large number written in front of a chemical formula.  It shows the number of molecules.

• Molecule

• Compound

• Coeffiecient

• Subscript