Why are rocks made of limestone usually an indication that an area was previously covered by ocean water

what's the question? I don't understand

Limestone can from form shell fragments of sea creatures

Explanation:

muscle endurance

explanation:

i can do 50 in a row ( but i get so tired after that)

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.