28.5 g of acetylene reacts with hydrogen, 23.4 g of ethane is produced. What is the percent yield of C2H6 for the reaction? C2H2(g) + 2H2(g)-C2H6(9)

Turbo the snail moves across the ground at a pace of 12 feet per day. if the garden is 48 feet away, how many days will it take for the snail to get there?

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

When water dissolves sugar, which process is not involved? o dissociation o hydration o surface area of the solute increases sa