When 30 g of nitrogen reacts with hydrogen, we obtain 170 g of ammonia.

a) What is the mass of the hydrogen that reacted?

b) What mass of ammonia would form if 90 g of nitrogen reacted?

when insulating materials rub against each other, they may become electrically charged . electrons , which are negatively charged, may be 'rubbed off' one material and on to the other. the material that gains electrons becomes negatively charged. the material that loses electrons is left with a positive charge.

well, you would divide 135 by 33 to get your answer. then that is how many seconds it would take. boardman should fly about 132 m or 4.090909090909091 seconds.

we need to know the time interval during which the force acts. impulse of force = momentum change

truck y has a greater velocity than truck x.