1.20 x 10^22 molecules NaOH to gram

In salt water solution,the salt is the blank

In the space, show a correct numerical setup for calculating the number of moles of co2 present in 11 grams of co2

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)