If 0.315 moles of hexane is combusted in a bomb calorimeter containing 5.68 liters of water, calculate the molar heat of combustion of hexane if the water temperature rises 55.4°C? The specific heat capacity of water is 4.18J/g°C.

What method(s) do plants use to obtain nitrogen? select all that apply. absorb it from the atmosphere use bacteria to convert nitrogen to usable form obtain usable nitrogen compounds from the soil absorb nitrogen from water taken in at the roots

The diagram below shows the different phase transitions that occur in matter. which arrow represents the transition in which dew is formed?

Abeaker with 2.00×102 ml of an acetic acid buffer with a ph of 5.000 is sitting on a benchtop. the total molarity of acid and conjugate base in this buffer is 0.100 m. a student adds 4.70 ml of a 0.360 m hcl solution to the beaker. how much will the ph change? the pka of acetic acid is 4.740.