When 1 mole of tin(IV) oxide is heated with 2 moles of hydrogen gas, 1 mole of tin metal and 2 moles of water vapor are generated. SnO2 + 2H2 → Sn + 2H2O

The answer is "0.74".

Explanation:

Moles of

The balanced chemical reaction will include 1 mole of react to the given 1 mole of mole of   react to give 0.74 moles of Sn, therefore its moles of tin metal will be 0.74 moles.

each chemical family is represented as a group or column on the periodic table. based on chemical properties, there are 6 types of chemical families. group 1 represents alkali metals, group 2 represents alkaline earth metals, groups 3 to 12 represent transition metals, groups 13 to 16 represent non-metals and other metals, group 17 represents halogens and group 18 represents noble gases.