Which of the following lists minerals in order of hardness from lowest to highest on the mohs hardness scale?

a. fingernail, penny, glass, topaz, diamond
b. calcite, quartz, wire nail, topaz, diamond
c. gypsum, apatite, topaz, feldspar, corundum
d. talc, fluorite, fingernail, streak plate, diamond

Awater molecule is polar because there is an uneven distribution of these between the oxygen and hydrogen atoms.

Iron reacts with oxygen to produce iron oxide (rust). this reaction is represented in an equation as 4fe + xo2 → 2fe2o3. identify the value of x that will balance the equation.

Which excerpt from the land, part 4 best supports the claim that paul is a talented horseback rider? a/“figure that says more than anything else! now, i want to ride that stallion! " b/my daddy shook his head. "paul only rides horses he knows. ” c/? i glanced over at the other rider. the fellow was older than i, and had the weight of a man on him. d/a man out of alabama, man name of ray sutcliffe, told my daddy i was such a good rider, he wanted me to ride some races for him.