What mass, in grams, of ammonium chloride must be added to a 0.400 L solution of 0.200 M ammonia to make a buffer with a pH of 9.20? Kb (NH₃) = 1.8 × 10⁻⁵

One or more substances changing into one or more substances is an example of a

Identify a specific example for each type of technology

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