Which of the following represents a pair of isotopes?

F 1h and 3h

G 16O2 - and 19F-

H 40K and 40Ca

J 16O2 - and 32S2-

Which number represents an acidic pH, 4 or 9?

Which arrangement results in a lunar eclipse?

An optically active alkyne A (C10H14) can be catalytically hydrogenated to butylcyclohexane. Treatment of A with C2H5MgBr liberates no gas.

Which formula represents lead (I I) chromate?

What is oxidized and what is reduced in this reaction? N2H4 (l) + 2H2O2 (l) → N2 (g) + 4H2O (g) A) N is reduced and H is oxidized. B) N is reduced and O is oxidized. C) N is oxidized and O is reduced. D) N is oxidized and H is reduced.

Why does light that passes through our windows at home not display the beautiful colors

What three relationships are true at equilibrium

What important natural resource do plastics come from? A. trees B. rocks C. minerals D. petroleum

What is a neutral atoms oxidation number

Suppose 30 grams of NaCl are placed in 900 mL of water. What is the molarity of this solution?