Which sequence of coefficients will balance the following equation?
Mg (s) + O2 (g) → 2Mgo (s)

Can someone explain to me how to do this problem ?

The respiratory system removes oxygen and water from the body. select the best answer from the choices provided t f

The weights of bags filled by a machine are normally distributed with a standard deviation of 0.05 kilograms and a mean that can be set by the operator. at what level should the mean weight be set if it required that only 1% of the bags weigh less than 9.5 kilograms? round the answer to 2 decimal places.