Phosphine gas, PH3, is toxic at exposures greater than 7.0 x 10 mg/L. To what pressure does this correspond at 25°C?

answer seismograph;

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.