An unknown gas effuses twice as fast as ch. what is the molar mass of the gas?



a. 64 g/mol

b.32 g/mol

c.8 g/mol

d. 4 g/mol

Three cards with holes are arranged in a straight line. a light is shined through the first card’s hole and travels through all three cards. what does this tell you about light rays? a) that light is reflected b) that light is refractive c) that light travels in a straight line d) that light does not travel in a straight line

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 of the following best supports the concept that genetic information is passed on to offspring from both of their parents, not just one?