Exactly 4.0g of sulfur is burnt in a fume extraction cupboard. The sulfur is ignited in an excess of oxygen: S(s) + O2(g) ➔ SO2 (g) a. What volume of gas will form in dm3 at rtp?

b. What volume of oxygen will be used up?

c. Why is the investigation carried out in a fume extraction cupboard?

7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '

Calculate the ratio of h+ ions to oh– ions at a ph = 7. find the concentration of h+ ions to oh– ions listed in table b of your student guide. then divide the h+ concentration by the oh– concentration. record this calculated ratio in table a of your student guide. compare your approximated and calculated ratios of h+ ions to oh– ions at a ph = 7. are they the same? why or why not? record your comparison in table a. what is the concentration of h+ ions at a ph = 7? mol/l what is the concentration of oh– ions at a ph = 7? mol/l what is the ratio of h+ ions to oh– ions at a ph = 7? : 1

In a laboratory, 1.55mg of an organic compound containing carbon, hydrogen, and oxygen is burned for analysis. this combustion resulted in the formation of 1.45mg of carbon dioxide and .89 mg of water. what is the empirical formula for this compound?