A 0.45g sample of mineral ore is analysed for chromium and found to contain 0.560mg ccr2o3.Express the concentration of cr2o3 in the sample as:a percentage, part per thousand, part per million and part per billion?

chemistry sucks a**

explanation:

the electron configuration that you gave me has 16 electrons ergo it has 16 protons ergo it is the element sulfur.

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.