Iron ore, (Fe2O3(s)) is smelted into iron metal by reacting it with coke, C(s). What mass of coke is required to produce 252 kg of iron metal?
2Fe2O3(s) + 3C(s) + 4Fe(s) + 3CO2(g)

Si una estrella no tiene paralaje medible, ¿qué puedes inferir?

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

In france, grapes are 1.95 euros per kilogram. what is the cost of grapes, in dollars per pound, if the exchange rate is 1.14 dollars/euro? (2.6)