Scandium oxide is insoluble in water. Describe how you could show that it is an amphoteric oxide

Based on the law of conservation of energy, which statement is false? answer- energy is lost when machines dont work right

Rutherford's experiment indicated that matter was not as uniform as it appears what part of his experimental results implied this idea

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.