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

a solenoid is created by wrapping a l = 90 m long wire around a hollow tube of diameter d = 4.5 cm.   the wire diameter is d = 0.9 mm.   the solenoid wire is then connected to a power supply so that a current of i = 9 a flows through the wire.

randomized variablesl = 90 m

d = 4.5 cm

d = 0.9 mm

i = 9 a                                          

write an expression for the number of turns, n, in the solenoid. you do not need to take into account the diameter of the wire in this calculation.

calculate the number of turns, n, in the solenoid.

write an expression for the length of the solenoid (l2) in terms of the diameter of the hollow tube d.

calculate the length of the solenoid (l2)   in meters.

calculate the magnitude of the magnetic field at the center of the solenoid in teslas.

explanation: