How many moles of silver are present in 30.5 g of silver? Show your solution:))

Idon’t know how to solve this question

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

Which metal exist in liquid state and can be cut with knife ?