If 2.2 moles of NaHCO3 are reacted and 19.10 liters of CO2 are formed, at STP, what is the percent yield of the reaction? 2NaHCO3 (s) = Na2CO3(s) +CO2(g) + H2O(g)

What element breaks down into yttrium-90?

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

2pos suppose an object in free fall is dropped from a building. its starting velocity is 0 m/s. ignoring the effects of air resistance, what is the speed (in m/s) of the object after falling 3 seconds? give your answer as a positive decimal without units. answer here