a boy stands on a scale and finds his weight to be 76.4 lb. if his feet cover an area of 16.9in^2 , how much pressure in lb/in^2 is the boy applying to the scale

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?

In a water molecule, hydrogen and oxygen are held together by a(an) bond. a) double covalent b) ionic c) nonpolar covalent d) hydrogen e) polar covalent

Use the periodic table to answer the following questions. what is the predicted order of first ionization energies from highest to lowest for beryllium, calcium, magnesium, and strontium? o be > ca > mg > sr o be > mg > ca > sr o ca > sr> be > mg o sr > ca > mg > be done