What determines the path that an object in projectile motion follows?

a) gravity only

b) inertia and air resistance

c) gravity and inertia

d) gravity and air resistance

C) gravity and inertia

Explanation:

- Inertia affects the motion on the horizontal axis. In fact, there are no forces acting on the projectile along the horizontal direction: therefore, the projectile will continue its motion with constant velocity for inertia.

- Gravity affects the motion on the vertical axis: in fact, there is only one force acting on the projectile along the vertical direction (gravity, which points downward), so along this direction the motion is uniformly accelerated, with constant acceleration g=9.8 m/s^2 towards the ground.

  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

trig 15.3 cos