Chemists study the properties of substances and the particles that compose those substances.

Which mixture has the largest particle size? A.) solution B.) colloid C.) compound D.) suspension

Looking at the structure of caffeine, explain why it is very soluble in a non-polar solvent and a little soluble in water.

Which element could not form in the sun and would have to be formed in a supernova? a. hydrogen (atomic number 1) b. helium (atomic number 2) c. oxygen (atomic number 8) d.

Consider the following thermochemical equation: C (s) + O2 (g) → CO2 (g) ΔH = - 393 kJ CO (g) + ½O2 (g) → CO2 (g) ΔH =

Why do ionic borids form between metal and no metals

In an experiment, a student estimates the acceleration due to gravity is 9.31 m/s2. The actual value is 9.8 m/s2. What is the student's percent error

Phosphoric acid can be used to clean scale (calcium carbonate) from water fixtures like taps by reacting with it to form products that dissolve easily. warming the phosphoric acid solution would - a. remove less scale. b. remove more scale. c.

What is the formula for tin (ll) chromate

Temperature is measured with a

Explain why an aqueous solution of Na2SO4 is neutral while an aqueous solution of Na2CO3 is basic in nature?