A group is playing kickball on a flat field. A 750g=0.750kg ball is kicked and has an initial velocity of <8.0, 10.0, 0> m/s after leaving the kicker's foot. How long is the ball in the air assuming it returns to the ground (ignore air resistance)? Note that the y-direction is up-and-down.

A. 2.04 sec
B. 3.26 sec
C. 1.02 sec
D. 0.816 sec
E. 1.63 sec

  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

it doesn't. it was imagined up in the middle ages.

it has to be b, about 97 percent.