Which of the following has the least mass? O a. 25 cg of oxygen gas
O b. 250 mg of helium gas
O c. 2500 ug of aluminum
O d. 0.025 g of sodium chloride (table salt)
O e. 0.25 kg of iron

Calculate the number of kilojoules to warm 125 g of iron from 23.5°c to 78.0°c.

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∘

Calculate the mass of carbon in 97.0 g of sucrose c12h22o11