Strips of aluminum and lead will react with hydrochloric acid, but a silver strip will not. A reaction was observed when an Al strip was placed in solution of Pb(NO3)2 and AgNO3. No reaction was
observed when an Ag strip was placed in a Pb(NO3)2 solution. Arrange the metals and hydrogen in
a relative reactive series, listing the most reactive first.

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Suppose that some of the compound spilled out of the crucible after it was heated. would that cause the percent by mass of water in the compound determined by the experiment to be too low, too high, or unchanged? briefly explain your answer.

Electromagnets coils of wire paper clips picked up 10 3 15 6 20 9 25 12 ms. owens' class was studying magnets. ms. owens showed her students how to make an electromagnet using a nail, a d-cell battery, and plastic coated wire. the students wrapped the wire around the nail and then attached the ends to the battery. when they were finished, they tested their magnets by investigating how many paperclips their magnets could pick up. they also tested whether they could increase the strength of their electromagnets by using more coils of wire. they recorded the class average of their results in the data table seen here. ms. owens asked her students to graph their data in a line graph. how should the students label the x-axis on their line graph? a) size of battery b) number of paper clips c) number of coils of wire d) strength of electromagnet