The standard heat of formation of nabr is -360.0 kj mol-1. the energy needed to vaporize one mole of br2(l) to give br2(g) is 31 kj mol-1. energy needed to vaporize one mole of na(s) is 107.8 kj. the first ionization energy of na is 495.4 kj mol-1. the bond energy of br2 is 192 kj per mole of br—br bonds. the lattice energy of nabr is -743.3 kj mol-1.

Answer: it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.explanation:   we have equation of motion ,where s is the displacement, a is the acceleration, u is the initial velocity and t is the time taken.average velocity = displacement/ time taken.average velocity = 10.69 miles/hr = 10.69*1.6*1000/(60*60) = 4.75 m/s4.75 = s/ts = 4. 1we also have acceleration = 2.18 m/s², initial velocity = 0 m/sso it will take   4.36 seconds to reach her average velocity 10.69 miles/hour.

The correct answer is c. hope this

It really doesn't matter for any of the questions that you've listed.

Conductionhope this .