In an ion with an unknown charge, the total mass of all the electrons was determined to be 2.55x10^-26 g while the total mass of its protons was 5.34x10^-23 g. what is the identity and charge of this ion?

An astronaut on the moon throws a baseball upward. the astronaut is 6 ft, 6 in. tall, and the initial velocity of the ball is 3030 ft per sec. the height s of the ball in feet is given by the equation s equals negative 2.7 t squared plus 30 t plus 6.5s=−2.7t2+30t+6.5, where t is the number of seconds after the ball was thrown. complete parts a and b.