Please help me with my chem homework! A lot of points1 Given:

N2(g) + 3 H2(g) → 2 NH3(g) ΔH= -91.8 kJ

Determine ΔH for:

1/2 N2(g) + 3/2 H2(g) → NH3(g)

8) a mixture of he, ne and ar has a pressure of 7.85 atm. if the ne has a mole fraction of 0.47 and 8) ar has a mole fraction of 0.23, what is the pressure of he? a) 4.2 atm b) 3.7 atm c) 5.5 atm d) 2.4 atm e) 1.8 atm

Light waves are as they pass through the

Scientists often have to deal with numbers that are either very large or very small. for example, the radius of the sun is approximately 696,000 kilometers, while bacterial cells are as small as 1.9 × 10-4 millimeters. express each number in an alternate form.