An atom with 7 protons, 6 neutrons, and 7 electrons has an atomic mass of amu. (Enter a whole number.) Numerical Answers Expected! Answer for Blank 1:

Does anyone know how to solve this problem? i really need . i made an attempt but i just cant get it. a metal rod is 25.000 cm long at 25.0 degrees celsius. when heated to 102.0 degrees celsius, it is 25.054 cm long. what is the coefficient of linear expansion for this metal.

On mars a rock falls an unknown vertical distance from a resting position and lands in a crater. if it takes the rock 2.5 seconds to fall, how high is the cliff the rock fell from? mars' surface gravity is 3.8 m/s2.

Which of the following is not an appropriate unit for acceleration? (kg/12 mihr? m/min/sec cm/30c?