Which of the following is a velocity? a) 30 m/s (meters per second) b) 30 m/s (meters per second) going down c) 30 km/s (kilometers per second)

What is the smallest component or the most basic building block of any element ? a. an atom, b.a compound c.gas d.element

Esign techniques and materials that reduce the negative environmental impact of a structure are referred to as

Tin has ten stable isotopes. the heaviest, 124sn, makes up 5.80% of naturally occuring tin atoms. how many atoms of 124sn are present in 82.0 g of naturally occurring tin? what is the total mass of the 124sn atoms in this sample?