Which of the following pieces of equipment should be used to measure the electron potential difference between two points on an electric circuit? a
Colorimeter
b
Spectrophotometer
c
Voltmeter
d
pH probe

Which traits do human embryos have that link them to a common ancestor with fish and reptiles? a. scales and tail b. gill slits and scales c. tail and gill slits d. hair and tail

Each of the following compounds contains a metal that can exhibit more than one ionic charge. provide systematic names for each of these compounds. (a) cr(clo3)6 (b) mo(cn)6 (c) cr2(so3)3 (d) v(clo2)2 (e) v(cn)5 (f) os(clo2)4

Which part of earth’s surface receives the most direct rays from the sun? a) equator b) ocean c) poles d) mountains