. Experimentalmente se comprueba que 5,58 g de hierro se combinan con 3,21 g de azufre obteniéndose un compuesto llamado sulfuro de hierro (II).
a) Calcula la masa de hierro necesaria para que reaccione con 1,23 g de azufre y se
obtenga este sulfuro de hierro (II).
b) ¿En qué ley fundamental se basa la respuesta a la pregunta formulada? Enúnciala.

Calculate the estimated density of each ball. use the formula d = m/v where d is the density, m is the mass, and v is the volume. record your calculations in table a of your student guide. given that the density of water is 1.0 g/cm3, make a prediction about whether each ball will float in water. record your prediction in table a. what is the estimated density of the table tennis ball? record your answer to the nearest hundredth

Steam reforming of methane ( ch4) produces "synthesis gas," a mixture of carbon monoxide gas and hydrogen gas, which is the starting point for many important industrial chemical syntheses. an industrial chemist studying this reaction fills a 1.5 l flask with 3.5 atm of methane gas and 1.3 atm of water vapor at 43.0°c. he then raises the temperature, and when the mixture has come to equilibrium measures the partial pressure of carbon monoxide gas to be 1 .0 atm. calculate the pressure equilibrium constant for the steam reforming of methane at the final temperature of the mixture. round your answer to 2 significant digits.

Balance the following reaction. as2s3 + 9o2 → 2as2o3 + so2