Use Avogadro's number which is numerically equal to ...
( 6.02 multiply by 10 to the power of negative 23)
Avocado's number is the number of particle(molecules, ions, atoms) present in one mole of substance.
number of molecule in 0.809 mole of h20 = ....
one mole of h20 contains (6.02* 10^-23)
0.809 mole contains....(6.02* 10^-23) (0.809)
which is equal to [4.951* 10 ^-23]
if I made no mistake in calculation...it must be correct
No. Of moles of ch4 = 100/(12+4) =6.25
No of moles of co2 = 6.25
Day and night is due to the earth rotating. Seasons are due to the earth rotating on a slightly tilted axis, causing light to be shone on different parts of the earth more directly during different parts of the year. Constellations changing throughout the night are because of the earth moving and rotating. Throughout the year, the earth moves, causing us to be facing different directions in different parts of the year. The North Star does't move because it is close to Earth's line of axis, and therefore does not appear to move.
Because while asexual reproduction is a copy of your genes and DNA, sexual reproduction involves an infinite amount of combos from your genes and your partners genes as well. I hope this helps
Mechanical energy is an energy that needs a medium to travel. Kinetic energy relates to the skateboarder as he moves across the pipe, and potential relates to right before he leaps onto the pipe with his skateboard.