8h2 + s8 8h2s
based on the mole ratios, what can most likely be predicted?
a.1 mol of hydrogen will react with 1 mol of sulfur.
b.8 mol of hydrogen will react with 1 mol of sulfur.
c. 8 mol of hydrogen will react with 8 mol of sulfur.
d.16 mol of hydrogen will react with 8 mol of sulfur.

Asubstance is a good conductor of electricity which of the following best explains a probable position of the substance in a periodic table

100 grams of molten lead (600°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/g⋅°c; the latent heat of fusion and the melting point of lead are 2.45 × 104 j/kg and 327°c, respectively.)

Tooth enamel consists mainly of the mineral calcium hydroxyapatite, ca_10(po_4)_6(oh)_2. trace elements in teeth of archaeological specimens provide anthropologist with clues about diet and diseases of ancient people. students at hamline university measured strontium in enamel from extracted wisdom teeth by atomic absorption spectroscopy. solutions with a constant total volume of 10.0 ml contained 0.726 mg of dissolved tooth enamel plus variable concentrations of added sr. added sr find the concentration of sr in the 10 ml sample solution in parts per billion = ng/ml. find the concentration of sr in tooth enamel in parts per million = mu g/g.