Why is it not possible to directly count the number of particles in a mole?

Which of the following does not describe a characteristic of carbon

Compare chemical weathering to mechanical weathering

Balance the following reactions CuO+S2 ➡️ CuS + SO2

Diamond is the hardest substance known while graphite is one of the softest. Both are made only of carbon atoms. What is the most likely reason why this is true? A. Both are bonded ionically. B. Both are bonded covalently. C.

Phosphorus is obtained primarily from ores containing calcium phosphate. If a particular ore contains 35.1% calcium phosphate, what minimum mass of the ore must be processed to obtain 4.13 kg of phosphorus?

Which best describes the molecules of an ideal gas

MgNH4PO4> Mg2P2O7+NH3+H2O

If 1.0 gram of matter was converted to energy, how much energy would be formed? A. 9.0 x 10-13 joules B. 9.0 x 1013 joules C. 3.0 x 1013 joules D. 3.0 x 108 joules

A piece of metal ore weighs 8.50 g. when a student places it into a graduated cylinder containing water, the liquid level rises from 21.25 ml to 26.47 ml. what is the density of the ore?

Find the mass of 3.65 x 10^-2 mol K2SO4