Pls helpp (no links) Which statement best describes the difference between a physical property and a chemical property?

A. Physical properties can be observed without changing a substance, but chemical properties are only observable when matter changes into a new substance.

B. Physical properties describe physical appearance, but chemical properties describe chemical composition.

C. Physical properties can be measured with a scale, but chemical properties can't be measured.

D. Physical properties are unchanging, even when a substance undergoes a chemical reaction, but chemical properties constantly change.

If 10.g of agno3 is available, what volume of 0.25 m agno3 can be prepared

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.

Adilute aqueous potassium nitrate solution is