Which formula represents the most polar molecule.

a h2

b h2o

c co2

d ccl4

Which is the correct rate- Given a reaction mechanism that has an overall reaction of 20, determining step? O O3 + 20 30 O 02+0 - 0 O 0 = 0 + 0 O 0; + 0 - 20

Is Pbs soluble in water

What is the specific heat (J/g°C) of a metal object whose temperature increases by 3.0°C when 17.5 g of metal was heated with 38.5 J? a. 0.73 b. 0.15 c. 1.4 d. 4.18 e. none of the above

A dogfish shark contains 24 chromosomes in each of its muscle cells. How many chromosomes are normally found in each of its gametes

What alteration to an HCN channel will reduce the transport of K + in favor of Na + transport? HCN channels are permeable to both K + and Na + ions.

Write the net ionic equation for the reaction between agno3 (aq) and na2so4 (aq). be sure to include states of matter in your answer.

Witch compound has an element ratio of 2:1

Consider the total ionic equation below. 2 upper N upper H subscript 4 superscript plus, plus 2 upper O upper H superscript minus, plus 2 upper H superscript plus, plus upper S upper O subscript 4 superscript 2 minus right arrow 2 upper N upper H

Which of the following is true regarding phase changes? A. Condensation is the reverse of evaporation. B. Melting is the reverse of deposition. C. Freezing is the same as sublimation. D. Sublimation is the same as boiling.

Which of the following adaptations to life on land is found in both insects and modern reptiles? A. metamorphosis from a larval form B. body surfaces that resist evaporation C. tracheae to distribute oxygen D. ability to fly E.