Some mercury (ii) oxide breaks down to form 32g of oxygen and 402g of hg. how many grams of mercury (ii) oxide were used in the reaction? A. 2
B. 307
C. 400
D. 402
E. 434

If the atomic mass of an atom is 34 and the atom contains 13 protons, how many neutrons does the atom contain?

The human activities in two locations are described below: location a: rampant use of plastic containers location b: excessive use of pesticides and fertilizers which statement is most likely true? location a will have poor air quality because plastic is biodegradable. location a will experience water scarcity because plastic absorbs moisture. the population of honeybees will increase in location b because production of crops will increase. the population of fish in location b will decrease because the water is contaminated.

Two people each hold the end of a rope and create waves by moving their arms up and down. this wave is best classified as a transverse wave because a) both the rope particles and the wave are moving in the same direction. b) the wave is moving up and down as the particles of the rope move horizontally. c) the wave is moving horizontally as the particles of the rope move up and down. eliminate d) the wave is moving in a parallel direction with the motion of the person's arms.