14 H+ + 6 Fe2+ + Cr2O72- . 2 Cr3+ + 6 Fe3+ + 7 H2O This reaction is used in the
titration of an iron solution. What is the concentration of the iron solution if it takes 45.20 mL
of 0.1000 M Cr2O72- solution to titrate 50.00 mL of an acidified iron solution?
a.
0.5424 M
b.
0.1000 M
c.
1.085 M
d.
0.4520 M
e.
0.2712 M

What element breaks down into yttrium-90?

8.98 dm3 of hydrogen gas is collected at 38.8 °c. find the volume the gas will occupy at -39.9 °c if the pressure remains constant.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.