Give an example of a purely physical change and an example of a chemical change

How can you use your knowledge of minerals chemical makeup or use a: to identify minerals b: to determine the color of the minerals c: to classify minerals d: to determine how to break down minerals

The base-dissociation constant, Kb, for aniline is 4.3 * 10-10. What is the acid-dissociation constant for the conjugate acid of aniline? 2.3 * 10-5 9.5 * 10-4 4.3 * 105 7.5 * 10 - 11

The energy from 0.015 moles of octane was used to heat 250 grams of water. The temperature of the water rose from 293.0 K to 371.2 K. What is the enthalpy of combustion of octane? The specific heat capacity of water is 4.18 J/K g. A. - 5448 kJ/mol B.

The step in the water cycle in which water vapor becomes liquid water is

What is the pH of a solution in which 222 mL of HCl (g), measured at 26.0 ∘C and 1.06 atm, is dissolved in water to give 1.5 L of aqueous solution? (Hint: Use the ideal gas law to find moles of HCl first.)

Based on what you read on the Marie Curie and the Science of Radioactivity website, name the scientists who shared the Nobel Prize in Physics in 1903 and describe their contributions that were recognized by the award.

What does aluminum hydroxide and calcium sulfate produce

Balnce the following molecular equation and write net ionic equation NaOH+H2SO4-Na2SO4+H2

Describe in words the reaction represented by the equation and include a description of the composition of each kind of molecule 2h2+02=2h20

Potassium chloride, kcl, sodium sulfate, na2so4, glucose, c6h12o6, carbon dioxide, co2 and ammonium phosphate, (nh4) 3po4, are soluble in water.