In the presence of dissolved oxygen, microorganisms can oxidize

nitrite ions (no–2) to nitrate ions (no–3) via the following reaction:

no−2 + 0.5 o2(aq) −−→ no−3

(a) this reaction is occurring in a batch bioreactor at a rate that is first order with respect
to both no–2 and o2(aq), with k2=3×10^4 l/mol·d . how much time is required for the nitrite
concentration to be reduced from 0.3 mm to 0.1 mm if o2 is resupplied continuously to maintain
the o2(aq) concentration at 4mg/l?

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves

Cryolite, na3alf6(s), an ore used in the production of aluminum, can be synthesized using aluminum oxide. start this question by first balance the chemical equation.1.) balance the equation: - alo3(s)+naoh(l)+hf(> na3alf6+h2o(g). 2.) if 17.5 kilograms of al2o3(s), 51.4 kilograms of naoh(l), and 51.4 kilograms of hf(g) react completely, how many kilograms of cryolite will be produced? 3.)which reactants will be in excess, (al2o3, naoh, or hf) 4.)what is the total mass of the excess reactants left over after the reaction is complete in kg?

There are approximately 15 milliliters (ml) in 1 tablespoon (tbsp). what expression can be used to find the approximate number of milliliters in 3 tbsp?