. We can determine the molar mass of air by considering Nitrogen (N2), Oxygen (O2) and Argon (Ar) make up 78%, 21% and 1% of the atmosphere, respectively. The molar masses of nitrogen, oxygen and argon are 14, 16, 40 g/mole. Compute the molar mass of air [(〖molar mass)〗_air=0.78〖(molar mass)〗_(N_2 )+0.21〖(molar mass)〗_(O_2 )+0.01〖(molar mass)〗_Ar] Remember that you have 2 atoms in N2 and O2. (5 points)

What are the resulting coefficients when you balance the chemical equation for the combustion of ethane, c2h6? in this reaction, ethane is burned in the presence of oxygen (o2) to form carbon dioxide (co2) and water (h2o). (g)+(g)→(g)+(g)

3.) for each of the following compounds, draw the major organic product of reaction with hcl or naoh and circle whether the starting materials and products will be more soluble in organic solvent or water benzoic acid + hcl: benzoic acid + naoh: oh benzoic acid water/organic water organic fluorenone hс: fluorenone + naoh: fluorenone water/organic water/organic веnzocaine + hci: benzocaine + n»oh: h2n benzocaine water/organic water organic o=

Significant figures are digits read directly from the measuring instrument plus one more digit, which is __ by the observer.