Apiece of iron with a mass of 119 g is placed in a graduated cylinder, where the water level is to 57 ml. the water level rises to 72 ml. what is the density of the iron

Explanation:

Initial level of water in the cylinder is given as

final level of volume in the cylinder is given as

so volume displaced by the iron piece is given as

so by Archemedies principle the volume displaced by the object is always equal to the volume of the object itself

so here volume of object is 15 mL

mass of the iron piece is 119 g

so here the density of the iron piece is given as

insects!

explanation:

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.