Apiece of an unknown substance weighing 124.0 grams is heated in boiling water to 100.0oc. when the substance is placed in a calorimeter containing 300.0 grams of water, the temperature of the water increased from 20.0oc to 26.0oc. what is the specific heat of the unknown substance, assuming all the heat is transferred to the water?

Americium-241 undergoes fission to produce three neutrons per fission event. if a neutron-absorbing material is mixed in with this sample so that the rate of neutron production drops down to 1.8 neutrons per fission event, which will be effective at achieving a critical mass? check all that apply. remove a deflective shield surrounding the sample. remove absorbent material mixed in with the sample. compress the sample of americium-241.

Take a look at this dandelion. the yellow flower on the right is pollinated and the seeds on the left are transported by

Iam hoping to create 5.72 grams of glucose. the plant was given 4.75 liters of co2 and 2.81 g of h20. which reactant was the limiting reagent? how much excess mass did we have of the other reactant?