2C₂H₂ + 5O₂ → 4CO₂ + 2H₂O 1. How many grams of water are produced from 100 grams of oxygen?
2. How many grams of water are produced from 100 grams of acetylene (C₂H₂)?
3. Given your answers to problems 4 and 5 how many grams of water are produced from 100 g each of oxygen and acetylene (C₂H₂)?

some sources quote the lethal dose, for an average 170lbs opiate-naive individual is between 75 and 375 mg

considering the question as per the attachment

here we can see that the radon nuclide has 222 as the atomic mass number and 86 as the atomic number.

when it undergoes nuclear fission it gives polonium which has atomic mass number as 218 and atomic number will be 84 along with a helium nucleus which has 4 atomic mass number and 2 as its atomic number.

222 = 218 + 4 (atomic mass number)

86 = ? + 2; therefore ? = 86-2 = 84.

the atomic mass number of polonium will be 84.

weight of any object is given by

w = m*g

where m is mass of the object and g is the acceleration due to gravity.

for earth the value of g is 9.8 m/s^2 so

w=117.6 n m=12 g=?

117.6=12g => g=9.8 m/s^2

which is the force of gravity on earth.