Asatellite at a particular point along an elliptical orbit has a gravitational potential energy of 4700 mj with respect to earth's surface and a kinetic energy of 4800 mj . later in its orbit the satellite's potential energy is 6000 mj .

use conservation of energy to find its kinetic energy at that point.

express your answer to two significant figures and include the appropriate units.

during satellite motion we know that total energy is always conserved

so here we will have

here we know that

now at other position

now from above equation we have

now we have

so its kinetic energy will be 3500 MJ

  the grams     of oxygen gas   that can be produced     is 20.6   grams of o₂

calculation

2liclo₃ →   2 licl + 3 o₂

step 1:   find the moles of liclo₃

moles = mass÷ molar mass

from periodic table the molar mass of liclo₃ =6.9 +35.5   +(16 x3) =90.4 g/mol

moles=38.7 g÷90.4 g/mol=0.4281   moles

step 2:   use the   mole ratio   to calculate the moles of o2

from equation above, liclo₃: o₂   is 2: 3  

therefore the moles of   o₂=0.4281 moles x3/2 =0.6422   moles

step 3: find mass   of o₂

mass= moles x molar mass

from periodic table the   molar mass of   o₂ = 16 x2= 32 g/mol

mass=0.6422   moles   x   32 g/mol = 20.6 grams of o₂