How do you convert [cal / (g °C)] to [BTU / lbm °F]? And other conversions with two units on the bottom.

Acompound contains c, h, and o atoms. when 1.130 g of the compound is burned in oxygen, 1.064 g co2 and 0.3631 g h2o are produced. what is the empirical formula of this compound?

What is the empirical formula of c6h18o3? ch3o c2h5o c2h6o c2h5o5

Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear