What si unit is used to measure the number of representative particles in a substance?

The reactants in a chemical reaction contain 900 J of chemical energy. The products of the reaction contain 9000 J of chemical energy.

In an experiment Nyla collected the following information about a solution made from a certain food: pH = 3 tastes sour reacts with metals conducts electricity Based on the information, what best describes the solution? A. Base B. Salt C. Neutral D.

How many electrons would a hydrogen atom require to fill up that first shell?

Provide a drawing of the porphyrin-type product that would result from the reaction between isobutyraldehyde and 3,4-dimethylpyrrole.

How many moles of silver atoms are in the piece of jewelry?

What conclusion can be drawn from the statement that an element has low electron affinity, low electronegativity, and a low ionization energy?

A scientist performs an experiment in which a radium-226 (Ra-226) atom decays into radon-222 (Rn-222). The scientist concludes that some energy must have been added to the system to cause this reaction to begin.

Which suitable method can be used to separate a mixture of sand and paraffin

How many vowels does the word love have

What is silicon used for? -matches -gunpowder -glass -steel can coating