Moles and Stoichiometry

Which expression can be used to solve a mass-to-mole conversion for the equation HCL -----> H₂ + Cl₂? Given: Mass of HCl and unknown: Mol of Cl2

In the reaction represented by the equation CH4(g) + O2(g) ----> CO2(g) + H2O(g), a mass of 125 g CH4 is reacted with excess oxygen. The expression: is used to calculate the:

• mass of oxygen redacted.

• mass of carbon dioxide produced.

• mass of water produced.

• none of the above.

Tags

NGSS.HS-PS1-7

What is the mole ratio of H2O to H3PO4 in the following chemical equation?

• 1 to 6

• 3 to 2

• 4 to 6

• 2 to 3

Tags

NGSS.HS-PS1-7

• 2 : 1

• 1 : 1

• 3 : 2

• 6 : 8

Tags

NGSS.HS-PS1-7

• 1 : 3

• 2 : 3

• 1 : 1

• 3 : 2

Tags

NGSS.HS-PS1-7

• 0.9 mol

• 18 grams

• 0.53 mol

• 36 grams

Tags

NGSS.HS-PS1-7

The most steps are required to solve stoichiometry problems when the reactant is given in grams and the product is sought in

• moles.

• grams.

• liters.

• number of atoms.

Tags

NGSS.HS-PS1-7

Fill in the steps required to find the number of grams of substance B produced from the number of grams of substance A: grams of A \rightarrow ________ \rightarrow _______ \rightarrow ______= grams of B.

Tags

NGSS.HS-PS1-7

For the reaction represented by the equation Pb\left(NO_3\right)_2+2KI\ \rightarrow\ PbI_2+2KNO_3 how many moles of lead iodide\left(PbI_2\right)are produced of 300 grams potassium iodide\left(KI\right) when Pb\left(NO_3\right)_2 is in excess?

• 114.78 mol PbI₂

• 0.904 grams PbI₂

• 0.904 mol PbI₂

• 114.78 grams PbI₂

Tags

NGSS.HS-PS1-7

• 408 g KClO₃

• 804 g KClO₃

• 598 g KClO₃

• There is not enough information.