Copper reacts with sulfur to form copper (I) sulfide according to the following equation: 2Cu + S → Cu2S What is the limiting reactant when 55g Cu reacts with 45.0g S?
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The excretory system,need answers for all: )

How many moles is 14.5 cm^3 of platinum? the density of platinum is 21.45 g/cm^3.

Given the following at 25c calculate delta hf for hcn (g) at 25c. 2nh3 (g) +3o2 (g) + 2ch4 (g) > 2hcn (g) + 6h2o (g) delta h rxn= -870.8 kj. delta hf=-80.3 kj/mol for nh3 (g), -74.6 kj/mol for ch4, and -241.8 kj/mol for h2o (g)