chem 212 exam 4 questions with answers

chem 212 exam 4 questions with
answers


most of earth's mass is made up of what element? -
CORRECT ANSWERS ✔✔iron


must abundant element in the earth's crust is.... -
CORRECT ANSWERS ✔✔oxygen


what form of nitrogen do plants use? - CORRECT
ANSWERS ✔✔nitrates/NO3


what is eutrophication and its consequences - CORRECT
ANSWERS ✔✔over fertilization... causes over growth of
plants and also can cause them to decay.


the steps of metallurgy - CORRECT ANSWERS ✔✔mine,
pretreat the ore, convert the mineral to the element,
refine, alloy


how are mineral compounds converted to the element? -
CORRECT ANSWERS ✔✔redox reaction

, what is the basic oxygen process? - CORRECT ANSWERS
✔✔it is used to make steel from pig iron. high pressure O2
oxidizes the impurities, lime flux (CaO) converts the
oxides to a molten slag that is then decanted leaving the
steel.


what is the most common ore of Cu and what other
elements does it contain? - CORRECT ANSWERS
✔✔chalocopyrite; Cu, S, and Fe


what is the most common element in the universe? -
CORRECT ANSWERS ✔✔H


What is the dow process? - CORRECT ANSWERS ✔✔it is
used to isolate magnesium from the sea. Ca(OH2) is used
to convert the dissolved Mg2+ ion to the Mg mineral
Mg(OH2)


how is sulfuric acid produced? - CORRECT ANSWERS ✔✔in
the contact process... a solid catalyst helps SO2 and O2
react


what is smelting? - CORRECT ANSWERS ✔✔the
reductionof a metal oxide with some type of C