Which equation obeys the law of conservation of mass?
2c4h10 + 2cl2 + 12o2 7co2 + ccl4 + 10h2o
c4h10+ cl2 + 2o2 7co2 + ccl4 + 8h2o
2c4h10+ 2cl2 + 12o2 4co2 + ccl4 + h2o
2c4h10+ 2cl2 + 6o2 co2 + ccl4 + 6h2o
4c4h10+ 4cl2 + 14o2 14co2 + ccl4 + 20h2o

What is the number of moles of chemical units represented by 9.03x10^24? and how do i show work? (dumb it down )

Which of the following statements about acidic water is true? a. acid has no effect on the h, o molecules. b. the solution contains a larger number of oh ions than h, o ions. c. the solution contains a larger number of h, o ions than qh ions. d. the solution contains an equal number of h, o ions and oh ions. none of the above e.

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