How many moles of nh4no3(s) must be dissolved in water so that 73.0 kj of heat is absorbed from the water? (the molar heat of solution of nh4no3 is 25.7 kj/mol.)

How many grams of co(g) are there in 74.5 ml of the gas at 0.933 atm and 30o 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∘

Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull