1. A student tried to solve the following problem by selecting the tile as shown. What, if anything,
2AgNO3 (aq) + Cu (s) — 2Ag (s) + Cu(NO3)2 (aq)
How many moles of silver nitrate (AgNO3) are
needed to produce 6.75 moles of copper (II) nitrate
(Cu(NO3)2) upon reacting with excess copper (Cu)?
6.75 mol Cu(NO3)2
1 mol Cu(NO3)2
2 mol AgNO3

What is limiting reactant? with examples

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.

For a research project, a student decided to test the effect of the lead(ii) ion (pb2+) on the ability of salmon eggs to hatch. this ion was obtainable from the water‐soluble salt, lead(ii) nitrate, which the student decided to make by the following reaction. pbo(s) + 2 hno3(aq) → pb(no3)2(aq) + h2o losses of product for various reasons were expected, and a yield of 86.0% was expected. in order to have 5.00 g of product at this yield, how many grams of pbo should be reacted? (assume that sufficient nitric acid, hno3, would be used.)