Consider the reaction. 2 Pb ( s ) + O 2 ( g ) ⟶ 2 PbO ( s ) An excess of oxygen reacts with 451.4 g of lead, forming 305.3 g of lead(II) oxide. Calculate the percent yield of the reaction. percent yield:

62.78%

Explanation:

2Pb + O2 —> 2PbO

To obtain the %yield, we must first obtain the theoretical yield. This can be achieved by doing the following:

Molar Mass of Pb = 207g/mol

Mass of Pb from the balanced equation = 2 x 207 = 414g

Molar Mass of PbO = 207 + 16 = 223g/mol

Mass of PbO from the balanced equation = 2 x 223 = 446g

From the equation,

414g of Pb reacted with O2 to produced 446g of PbO.

Therefore, 451.4g of Pb will react with O2 to produce =(451.4x446)/414 = 486.3g of PbO.

Therefore the theoretical yield of PbO is 486.3g.

Now we can obtain the the %yield as follows:

Actual yield = 305.3g

Theoretical yield = 486.3g

%yield =?

%yield = Actual yield/Theoretical yield x100

%yield = 305.3/486.3 x100

%yield = 62.78%

a rain shadow is a dry region of land on the side that is protected against the prevailing winds of a mountain range. the prevailing winds are the winds that occur most of the time in a particular place of the earth

prevailing winds carry air toward the mountain range. as the air rises up over a mountain range, the air cools, water vapor condenses, and clouds form. on this side of the mountains, called the windward side, precipitation falls in the form of  rain  or snow. this dry air produces a  rain shadow.