Verena is mixing a material into a beaker filled with a liquid. she notices that the material seems to disappear into the liquid. what physical property of the material is serena most likely observing

She observes solubility - the ability of the substance to dissolve in e.g. the liquid.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.

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