What is scientific notation

What mass of natural gas (ch4) must you burn to emit 276 kj of heat?

Answer asap need it by wednesday morning calculate the ph of 0.02m hcl best answer will be brainliest

Which of your 24 wells had indications that a chemical reaction occurred? how were you able to tell that a chemical reaction occurred? which of your 24 wells had indications that a physical reaction occurred? how were you able to tell that a physical reaction occurred? report on both mixing and evaporation. make a general statement about whether your hypotheses were validated or rejected. must your hypotheses be correct for this to be a successful laboratory?