All but the most inactive metals react with acids to give
a. hydrogen and the metal salt.
b. hydrogen and the metal hydroxide.
c. hydrogen and the metal oxide.
d. oxygen and the metal hydride.
a
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The "words" that make up the genetic code contain how many letters?
A) 4 B) 20 C) 5 D) 3
Classify the following as element, compound, or mixture, and justify your classifications: table salt, stainless steel, table sugar, aluminum, ice
A) mixture; element; compound; element; element B) compound; mixture; compound element; compound C) mixture; compound; mixture; element; compound D) compound; element; compound; element; compound
Using a Michelson interferometer and a light source of 400nm, a change from bright to dark indicates a change in distance of
a.
b.
c.
d.
What is meant by the phrase "angular size"?
A. the distance around an object B. an object's diameter C. the angle between two circular objects D. how big an object looks, expressed as an angle