Using the dilution expression (ciVi = cfVf or M1V1 = M2V2) calculate the volumes of H2SO4 and KOH needed, given that the actual concentrations of these reagents available in lab (9.00 M H2SO4 and 1.40 M KOH) are different from the concentrations called for in the original procedure (10.0 M H2SO4 and 2.00 M KOH). Finally, scale the resulting volumes down by the factor calculated in (1) above (the factor was 0.0711). Report your volumes to the nearest ±0.1 mL.

There are 6.022, 104 atoms of hg in 1 mole of hg the number of atoms in 45 moles of hg can be found by multiplying 4.5 by 6.022, 102 which is the number of atoms in 4.5 moles of hg, correctly written in scientific notation with the correct number of significant figures? 0 21,109 0 21,100 271, 1024 27.099, 100 mark this and retum save and exit submit

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

3) in peaches, [oh]=3.16x10-11 m a) find [h+ ] b) what is the ph? c) is the solution acidic, basic, or neutral?