En una pràctica de laboratori els fan reaccionar 24 grams d'etanol amb 59 grams de bromur de fòsfor (II) i obtenen 36g de bromur d'etil. Calcula quin és el reactiu limitant i quin és el reactiu en excés. Recorda revisar si la reacció està ajustada! C2H5OH + PBr3 C2H5Br + HPO3

Density of salty water as compared to the density of pure water is(a) is less(b) is always equal(c) is always more(d) may be less or more

The rigid beam is supported by the three suspender bars. bars ab and ef are made of aluminum and bar cd is made of steel. if each bar has a cross-sectional area of 450 mm2, determine the maximum value of p if the allowable stress is (σallow)st = 200 mpa for the steel and ( σallow)al = 150 mpa for the aluminum. est = 200 gpa and eal = 70 gpa.

You are about to open a container of soy milk but notice that there are instructions to “shake well before serving.” the soy milk is most likely a