How many seconds does it take to deposit 1.63 g of Ni on a decorative drawer handle when 15.3 A is passed through a Ni(NO3)2 solution?

0.2348 grams of pbcl2 used to form 44.0 ml of solution.

What is the enthalpy of combustion (per mole) of c4h10 (g)? –2,657.5 kj/mol –5315.0 kj/mol –509.7 kj/mol –254.8 kj/mol

Scientists are often interested in knowing the molar heat of combustion – the heat released during the combustion of one mole of a substance. use the periodic table to find molar masses. how many moles of ethanol are present in the sample?