Calculate the force between one object with a radius of 0.08 meters and a mass of 0.045 kilograms and the earth

The force between an object with a mass and the earth is actually the weight of the object, which can be calculated by w=mg. (where w is the weight (gravity force) of the object, m is the mass of the object, and g is acceleration due to gravity.)

So, w = 0.045 kg x 9.8 m/s2

         = 0.441 N (Newton)

answer: electrons

  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