Asample of propane (c3h8) has a mass of 0.47 g. the sample is burned in a bomb calorimeter that has a mass of 1.350 kg and a specific heat of 5.82 j/(g • °c). how much energy is released by the reaction if the temperature of the calorimeter rises by 2.87°c?

If someone could do the first couple, just so i can see how it's done that would be great! 20 points. complete a dichotomous key for the 10 leaves on the common leaves sheet. the chart provided here allows for 11 pairs of statements. depending on how you build your dichotomous key, you may or may not need all of them, or you may need to add some.

Pepsin is an enzyme in the stomach that breaks polypeptides into amino acids. pepsin functions best at a ph of around 1.5. what would be the most likely result if the ph of the stomach were increased to 5

Ascientist is conducting an investigation that involves water, silver, carbon dioxide, and oxygen gas which group of statements best describes all of the materials he is using in the investigation?