What is the strength of gravitational force is A. Directly proportional to distance
B. Inversely proporitional to distance
C. The inverse square of distance
D. Not effected by distance
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Which set of characteristics best describes igneous rock? a) largest type of rock, made of organic matter, hardest type of rock b) least abundant type of rock, made of other rocks, made mostly of minerals c) found on all continents, contains wavy bands of stripes, contains fossils d) most abundant type in earth's crust, made of magma/lava, contains no fossils

An atom of lithium-7 has an equal number of(1) electrons and neutrons(2) electrons and protons(3) positrons and neutrons(4) positrons and protons

Hey guys so i need to know what is _nh3+> nh4oh ~chemistry~