?

I got h= S-2 Δr but i don't know if it is correct

"On the moral and legal status of abortion"

a) lead(II)nitrate+ sulfuric acid

b) calcium carbonate+ hydrochloric acid

c) sodium hydrogen carbonate+ nitric acid

a) lead(II)acetate+ calcium iodide

b) iron(III)sulfate+ strontium(II)nitrate

c) potassium oxalate+ calcium chloride

(a) Is O2− stable?

(b) What is the outer (valence) electron configuration of Be2+?

Archeologists removed some charcoal from a Native American campfire, burned them in O2, and bubbled the CO2 formed into Ca(OH)2 solution (limewater). The CaCO3 that precipitated was filtered and dried. If 4.80 g of the CaCO3 had a radioactivity of 3.3 d/min, how long ago was the campfire? (t1/2 of 14C = 5730 years, and the ratio of 12C/14C in living organisms results in a specific activity of 15.3 d/min g.)

Archeologists removed some charcoal from a Native American campfire, burned them in O2, and bubbled the CO2 formed into Ca(OH)2 solution (limewater). The CaCO3 that precipitated was filtered and dried. If 4.80 g of the CaCO3 had a radioactivity of 3.3 d/min, how long ago was the campfire? (t1/2 of 14C = 5730 years, and the ratio of 12C/14C in living organisms results in a specific activity of 15.3 d/min g.)

Arrange the following AXn species in order of decreasing X-A-X bond angles?SF6, PbCl2, HCN, PF3, H2O. (Use the appropriate <, =, or > symbol to separate substances in the list.)

a)Consider the molecules CF4, BrF3, NF3, SF6, and BF3. Which molecules have a dipole moment?

b)Consider the molecules SCl2, CS2, F2, NH3, and CF4. Which molecules have a dipole moment?

a)Consider the molecules CF4, BrF3, NF3, SF6, and BF3. Which molecules have a dipole moment?

b)Consider the molecules SCl2, CS2, F2, NH3, and CF4. Which molecules have a dipole moment?

a)CBr4

b)HI

c)H2

d)PH3