Lithium and potassium have similar chemical properties because the atoms of both elements have the same
(1) mass number
(2) atomic number
(3) number of electron shells
(4) number of valence electrons

Urea, co(nh2)2, is manufactured on a large scale for use in producing urea-formaldehyde plastics and as a fertilizer. what is the maximum mass of urea that can be manufactured from the co2 produced by combustion of 1.00 x 104 grams of co2?

No copying 15 pts how does a free-body diagram tell you about the net force on an object?

An object displaces 652 ml of water. the volume of the object is: 0.652 cm³ 6.52 cm³ 65.2 cm³ 652 cm³