Answer:
you can classify a mineral by its appearance and other properties. The presence of a mineral is defined by the color and luster, and the color of the powdered mineral is described by the band. Every mineral has a distinctive density. To compare the hardness of rocks, the Mohs Hardness Scale is used.
Explanation:
PV=nRT<=> P=nRT/V=2,40*R*(273+97)/45 atm.
Calculate it. R is a number that is given, find it and use your math to solve.
Answer: 5.18
Explanation:
Mathematically, pOH is expressed as
pH = -log(OH-)
where OH-is the concentration of hydroxide ion
So, pOH calculations are as follows
pOH = -log(1.50x10-9 M)
pOH = -(-8.82)
pOH = 8.82 [the two minus signs cancelled out]
Since pOH = 8.82; apply the formula
pH + pOH = 14 to get pH of the solution
Hence, pH + pOH = 14
pH + 8.82 = 14
pH = 14 - 8.82
pH = 5.18
Thus, the pH of a solution with a 1.50x10-9 M hydroxide ion concentration is 5.18 (slightly acidic)
Answer:
iodine
Explanation:
<em>The substance that can break easily from the list of substances is the </em><em>iodine</em><em>.</em>
<u>Iodine exists as a molecular solid and hence, the molecules are held together by weak Van Der Waal's forces. Iodine thus has characteristic properties of typical molecular solids which include being able to be broken into pieces easily (brittle), low melting and boiling points, insolubility in water, among other properties.</u>
The characteristics of iodine are unlike sodium, calcium, and copper that exist as metal which is hard, tough with high tensile strengths.
