What exactly are impurities?

Which state of matter have no define shape or volume

A cylinder has a hight of 6 meters and a diameter that is 6 times the measure of the hight using 3.14 for pi which of the following can be used to calculate the volume of the cylinder 3.14) (36m) 2 (6m) (3.14) (18m) 2 (6m) (3.14) (6m) 2 (6m) (3.

Write a brief introduction on secondary metabolites (Minimum one page)

Why isn't hydrogen considered an alkali metal?

Write the chemical symbols for three different atoms or atomic cations with 12 electrons.

What is a example of one natural source of radioactivity

Give the coordination number for each metal ion in the following compounds: (a) [Co (CO3) 3]3 - (note that CO32 - is bidentate in this complex) (b) [Cu (NH3) 4]2+ (c) [Co (NH3) 4Br2]2 (SO4) 3 (d) [Pt (NH3) 4][PtCl4] (e) [Cr (en) 3] (NO3) 3 (f) [Pd

A gas contained in a steel tank has a pressure of 1.5 atm at a temperature of 320 K. What will be the gas pressure when the temperature changes to 450 K?

How many ml is in a teaspoon?

In 1987 the first substance to act as a superconductor at a temperature above that of liquid nitrogen (77 k) was discovered. the approximate formula of this substance is yba2cu3o7. calculate the percent composition by mass of this material.