Which one of these equations is balanced? a. zn + 2hcl --> zncl2 + h2 b. s8 + 24f2 --> 8sf6

a

b

a and b

neither

When a device is used in a circuit in which the voltage is 81 v the current flowing through the device is 3 a what is the resistance of the device

What effect would average population growth have on land usage? a. urban use of land would rise to more than 30 percent of available land. b. industrial use of land would rise to more than 30 percent of available land. c. the percentage of available land used as cropland would stay the same. d. cropland would fall to about 10 percent of available land.

How do you determine the percent yield of a chemical reaction