During a chemical reaction, methane (CH,) and oxygen (0.) combine to produce carbon dioxide (CO) and water (H2O). The
balanced chemical equation identifies the reactants and products for
this reaction along with some of their masses. What mass (in grams)
of oxygen (O2) is required for this reaction to occur?
A.16
B. 36
C.44
D. 64

Harvey kept a balloon with a volume of 348 milliliters at 25.0˚c inside a freezer for a night.  when he took it out, its new volume was 322 milliliters, but its pressure was the same.  if the final temperature of the balloon is the same as the freezer’s, what is the temperature of the freezer? the temperature of the freezer is  kelvins.

Sex cells from female reproductive organ? 1) mitosis 2) fertilization 3) zygote 4) eggs 5) meiosis 6) sperm

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