3 NO₂(g)   +   H₂O(l)   →   2 HNO₃(l)   +   NO(g)    Δ_rH = -72.0 kJ, calculate the molar enthalpy of reaction, _rH for:  NO₂(g)        

An  athlete jumped a pole vault that was over 2 m high . Her horizontal distance was 5m. What was her initial speed?

Chlorine and Carbon monoxide gases are mixed in a 1.00L container and equilibrium is established. Initially, 1.5 mol of chlorine was present with excess carbon monoxide. At equilibrium, 0.80 mol of COCl₂ was found. Calculate the percent reaction. Write the equilibrium law. 

Why is knowing a combination of four pairs of equal sides or angles harantees one of the congruence relationships

A 55.0 kg crate is being pulled down a 20.0 $^{\circ}$^?  incline by a rope(acting parallel with the incline surface). If it is accelerating downwards at 1.50m/s $^2$²  and the force of the kinetic friction is 152 N then what is the tension of the rope?

A quadratic function has zeros at -3/2 and 6. The graph of the function passes through the points (1,-12.5). What is the equation of the function, in standard form?

france has claimed the worlds fastest train. A modified TGV can accelerate to a maximum speed of 575 km/h. If the train started from rest and reached its maximum velocity of 575 km/h at 8.00 km, what would the magnitude of the acceleration of the train be?

a lightning strike transfers 210 C of charge to the ground within 1.5x10^-3 s (1.5 ms). The current during the lightning strike is?

a canopy tour co. designs a zip line . one line takes the passenger through a waterfall  the max height which is 167 ft. the zip line starts at 130 ft and goes to ground at 100 ft out. the water fall starts at 167 ft and hits ground at 75 ft our. what are th system of equations to model these