Pepsi brand soft drinks contain 38 mg of caffeine (molar mass = 194.19 g/mol) for every serving (355 mL of solution) What is the molarity of caffeine in this solution?

Molarity is 5.51 *10^-5 mol/dm3

Explanation:

Molarity shows the number of solutes in moles per litre of solution.

step 1: Calculate the concentration in g/dm3

38 mg in 355 mL of solution

38/ 1000 g in 355/1000 L of solution

Concentration in g/dm3 = 0.0038 / 0.355

=  0.0107 g/dm3

step 2: Calculate the concentration in mol/dm3

Concentration in mol/dm3 = concentration in g/dm3 / RMM

RMM = 194.19 g/mol

Molarity = 0.0107 / 194.19

molarity = 5.51 * 10^-5 mol/dm3 of solution.

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).

qualitative observation deals with data that can be observed with our senses: sight, smell, touch, taste, and hearing. they do not involve measurements or numbers. for instance, colors, shapes, and textures of objects are all qualitative observations.