What is the percentage of nitrogen in the fertilizer urea ((nh2) 2co)

The amount of energy needed to change a material from a solid to a liquid is heat of

Which reverse the normal flow of thermal energy

What is the color of elemental silver? Explain.

The chemical formula of gluscose is C6 H12 06. what are names of the elements in gluscose, and how many atoms of each element are present in a gluscose molecule?

1. There are how many mol of oxygen in 3.5 mol of caffeine.

A scientist has two solutions, which she has labeled Solution A and Solution B. Each contains salt. She knows that Solution A is salt and Solution B is salt. She wants to obtain ounces of a mixture that is salt.

Reactions that affect the nucleus of an atom are called? A. Fusions B. Radioactive decays C. Nuclear reactions D. Fissions

The amplitude of a wave is most directly related to what wave characteristic? Crest length Frequency Wavelength Wave height

Why is oil unable to dissolve well in water? Water is polar and oil is nonpolar, which means they have no attraction for each other. Oil molecules are too large to fit between the closely spaced water molecules in the liquid state.

The fertilizer ammonium sulfate is prepared by the reaction between ammonia and sulfuric acid. How many kg of ammonia are needed to produce 1x10^5 kg of (NH4) 2SO4?