Coefficients Chemistry

How many oxygen atoms are in this chemical formula?

• 6 oxygen atoms

• 2 oxygen atoms

• 3 oxygen atoms

• 4 oxygen atoms

Tags

NGSS.MS-PS1-1

Identify the part of the equation in the red box

• Coefficient

• Atomic Symbol

• Subscript

• I don't know

Coefficients tell ...

• how many elements are in a formula

• how many molecules are represented

• how many atoms of an individual element are present

• I don't know

If a formula has no coefficient in front of it, how many molecules are present?

• 1

• 2

• 3

• 4

True/ False: Coefficients indicate how many atoms of an element exist in one molecule

• True

• False

Tags

NGSS.MS-PS1-1

Make a list of the elements and numbers of atoms in the chemical formula

Tags

NGSS.MS-PS1-1

Nora, Henry, and Noah are having a debate. Nora thinks the equation is balanced, but Henry and Noah aren't sure. Who do you agree with?

• I agree with Nora, the equation is balanced

• I agree with Henry and Noah, the equation is not balanced

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

Coefficients in a chemical equation indicate...

• the number of molecules involved in the reaction

• the type of chemical reaction

• the temperature at which the reaction occurs

• the speed of the reaction

• 2 atoms of hydrogen

• 2 molecules of hydrogen

• 2 grams of hydrogen

• 2 moles of hydrogen

If a chemical equation is balanced, what do the coefficients ensure?

• The total mass of reactants equals the total mass of products

• The reaction occurs at room temperature

• The reactants are in a gaseous state

• The reaction is exothermic

Tags

NGSS.MS-PS1-5