If the density of mercury is 13.6 g/mL, what is the mass of 25.4 cm3 of
mercury?

There are main groups in the modern periodic table of elements

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)

Convert the temperature of dry ice, –77 ∞c, into degrees fahrenheit and kelvin.