Can two different samples of the same substance have different physical properties? Chemical properties?

Why shouldn't schools be allowed to ban dyed hair?

If Na2SO4 were to dissolve in water, how many ions per molecule would be formed?

The moon and the sun both affect the tides on Earth. This evidence BEST supports the hypothesis that A) the sun's and moon's gravitational attraction to water is unique. B) every object exerts gravitational force on every other object.

The compound ammonia is composed of a single nitrogen atom bonded by single bonds to three hydrogens. How many electrons total are contained in the three single bonds? A. 3 B. 4 C. 5 D. 6

German scientist alfred wiener is best known for what hypothesis?

Give me an example of lustre that is shiny and dull.

Which of the following animal niches will be filled as in ecosystem Begins the stage of ecological succession

List the five major pollutants in the United States

The net gain of atp per molecule of glucose fermented is

What is the name of this compound? CH3-CH2-CH2-CH2-O-C6H5 butylphenyl ether cyclohexylbutyl ether phenylbutyl ether butylcyclohexyl ether