Four identical zinc plates are placed in four different solutions of sulfuric acid (h2so4). the following reaction occurs: zn + h2so4 znso4 + h2 in which concentration of sulfuric acid solution would the reaction occur the fastest? a. 0.16 m h2so4 b. 0.01 m h2so4 c. 0.016 m h2so4 d. 0.1 m h2so4

Agroup of students is studying convection currents. they fill two identical balloons with the same amount of helium. one balloon is placed in a freezer and the other in an area with warm air. after 10 minutes, the balloons are released from a height of 1 meter. which of the following do the students most likely observe? a. the balloons both rise. the cold balloon is larger than the warm balloon. b. the balloons rise at the same rate. both balloons are the same size. c. the warm balloon expands and rises. the cold balloon shrinks and sinks. d. the cold balloon expands and rises. the warm balloon shrinks and sinks.

Which characteristics can be used to differentiate star systems? check all that apply.

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.