Design an experiment to test the following hypothesis: The period of a simple pendulum is proportional to its length. Some important notes: • A simple pendulum is a pendulum that is swinging with a small amplitude and whose bob (the object attached to the end) is small in size compared to the length of the pendulum and whose mass is much larger than the mass of the string. • A pendulum’s period is the time that passes before its motion begins to repeat. • ‘Proportional’ is NOT the same as ""as the length of the pendulum increases so will its period"". ‘Proportional’ means something more specific than that.

  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

does anyone know or what?

your answer is, orbit around the nucleus