Given the reaction: Cu(s) + 2Ag+ (aq) + Cu²+(aq) + 2Ag(s) Which statement correctly indicates the change that occurs?
1.
One mole of Cu(s) loses a total of 2 moles of electrons.
One mole of Cu(s) gains a total of 1 mole of electrons.
3.
Two moles of Ag (aq) loses a total of 2 moles of electrons
4.
Two moles of Ag (aq) gains a total of 1 mole of electrons

What volume of a 2.00 m stock solution of naoh is needed to prepare 150. ml of 0.40 m solution?

The difference between the atomic number of an element and the element’s atomic mass is the number of ions.

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