50 points !
1) the main goal of science is to:
a) collect facts and learn "the truth"
b) understand nature
c) do wild and crazy experiments
d) is to produce facts
2) an observation is received directly or indirectly by
a) hearing
b) seeing
c) tasting/touch
d) all of above
3) scientific fact can never change
a) true
b) false
4) a scientific theory
a) holds the highest level of acceptance
b) explains a number of facts
c) uses specific hypotheses and descriptive laws that have been well-tested
d) all of above
e) none of the above
5) a scientific hypothesis starts with the lowest level of acceptance but can become stronger as hey are used and survive repeated testing.
a) true
b) false

What mass of carbon dioxide is produced from the complete combustion of 4.50×10−3 g of methane?

Listen base your answer to the question on the information below. propane is a fuel that is sold in rigid, pressurized cylinders. most of the propane in a cylinder is liquid, with gas in the space above the liquid level. when propane is released from the cylinder, the propane leaves the cylinder as a gas. propane gas is used as a fuel by mixing it with oxygen in the air and igniting the mixture, as represented by the balanced equation below. c3h8(g) + 5o2(g) → 3co2(g) + 4h2o() + 2219.2 kja small amount of methanethiol, which has a distinct odor, is added to the propane to consumers detect a propane leak. in methanethiol, the odor is caused by the thiol functional group (–sh). methanethiol, ch3sh, has a structure that is very similar to the structure of methanol. what is the correct structural formula for a molecule of methanethiol

What reaction is taking place? 02 + c3h8 = h20 + co2