Gold has a density of 19.3 g/cm3. what is the mass of a 5 cm3 block of gold?
a. 3.9 grams
b. 19.3 grams
c. 38.6 grams
d. 96.5 grams

Asample of aluminum foil contains 8.60 × 1023 atoms. what is the mass of the foil?

Which of the following statements about hybrid orbitals is or are true? choose all that apply. choose all that apply. under sp2 hybridization, the large lobes point to the vertices of an equilateral triangle. after an atom undergoes sp hybridization there is one unhybridized p orbital on the atom. the angle between the large lobes of sp3 hybrids is 109.5∘

How many absorptions would you expect to observe in the 13c nmr spectra of the following molecules? a) 3-chloropentane b) cis-4-methyl-2-pentene