Why is the bond between two single hydrogen atoms stable? a. it is not stable, each hydrogen only has 1 electron and they need 8 electrons to be stable. b. hydrogen only uses the first energy shell, which holds 2 electrons, not 8. c. each hydrogen donates more electrons in their lower energy shells to get to 8 but only to other hydrogen atoms. d. each hydrogen has 4 electrons to share for a total of 8 when 2 hydrogens bond.

What does earth’s rotation on its axis cause? the tides night and day passing of years phases of the moon

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

Percent ionization for a weak acid (ha) is determined by the following formula: percent ionization=[ha] ionized[ha] initial×100%for strong acids, ionization is nearly complete (100%) at most concentrations. however, for weak acids, the percent ionization changes significantly with concentration. the more diluted the acid is, the greater percent ionization. a certain weak acid, ha, has a ka value of 9.4×10? 7.part acalculate the percent ionization of ha in a 0.10 m solution. part bcalculate the percent ionization of ha in a 0.010 m solution