In this reaction, what roll does the lead (ii) nitrate play when 50.0 ml of 0.100m iron (iii) chloride are mixed with 50.0 ml of 0.100m lead (ii) nitrate? a) lead (ii) nitrate increases the amount of precipitate. b) the reactant lead (ii) nitrate decreases product yield. c) lead (ii) nitrate is the excess reactant in the reaction. d) the lead (ii) nitrate is the reaction's limiting reactant.

 D) The lead (II) nitrate is the reaction's limiting reactant.

Explanation:

As can be seen from the balanced chemical equation,  3 moles of lead nitrate react with 2 moles of ferric chloride.

Thus moles of lead nitrate react with of ferric chloride.

moles of ferric chloride will be left unreacted.

Limiting reagent is the reagent which limits the formation of product. Excess reagent is one which is in excess and thus remains unreacted.

Thus lead nitrate is the limiting reagent and ferric chloride is the excess reagent.

under a microscope, cancer cells may look very different from normal cells. they often have different sizes and some may be larger than normal while others are smaller. cancer cells are often abnormally shaped and the control centre of the cell (the nucleus) may have an abnormal appearance.

i think? ?

geosphere and hydrosphere.

this is because the geosphere has to do with geological events, while the hydrosphere controls all water on earth.