In a chemical reaction, atoms are rearranged to form new molecules However, atoms are neither created nor destroyed What happens to the total mass of the atoms involved in a chemical reaction?
OA. It always changes as the atoms are rearranged into new molecules
ОВ.
It will increase if a new compound is formed during the reaction
C. It will stay the same no matter how the atoms are rearranged
D
It will decrease if two molecules combine to form a single compound

This question is worth 54 points ! rock falls from a ledge to the ground what energy conversion occurs during this process a potential to kinetic b kinetic to potential c thermal to mechanical d chemical to mechanical

One hazard of space travel is debris left by previous missions. there are several thousand masses large enough to detect by radar orbiting the earth, but there are far greater numbers of very small masses such as flakes of paint. calculate the force exerted by a 0.110 mg chip of paint that strikes a space shuttle window at a relative speed of 5.00 ✕ 103 m/s and sticks, given the collision lasts 6.00 ✕ 10-8 s. such a collision chipped the window of the ill-fated challenger in june 1983, causing $50,000 of damage.

The molecular weight of oxygen gas (o2) is 32 while that of hydrogen gas (h2) is 2. prove that under same physical conditions, the velocity of sound in hydrogen is four times that in oxygen