Potassium permanganate (kmno4) reacts with hydrochloric acid (hcl) to form potassium chloride (kcl), manganese chloride (mncl2), water (h2o), and chlorine gas (cl2). the balanced chemical equation is 2kmno4 + 16hcl → 2kcl + 2mncl2 + 8h2o + 5cl2. select the correct ratios of each of the following substances.

kmno4: kcl =

hcl: h2o =

kmno4: cl2 =

hcl: mncl2 =

Infants born with severe respiratory problems are sometimes given liquid ventilation: they breathe a liquid that can dissolve more oxygen than air can hold. one of these liquids is a fluorinated compound, cf3(cf2)7br. the solubility of oxygen in this liquid is 66 mlo2 per 100 ml liquid. in contrast, air is 21 % oxygen by volume. calculate the moles of o2 present in an infant's lungs (volume: 12 ml ) if the infant takes a full breath of air. assume a pressure of 1 atm in the lungs.

If a solution is considered basic, then a) the hydroxide ion and hydronium ion concentrations are equal. b) the hydroxide ion concentration is less than the hydronium ion concentration. c) the hydronium ion concentration is greater than the hydroxide ion concentration. d) the hydroxide ion concentration is greater than the hydronium ion concentration.

If 15 drops of ethanol from a medical dropper weight 0.60g, how many drops does it takes from a dropper to dispense 1.0ml of ethanol? the density of ethanol is 0.80g/ml