How would 13,400,000 be expressed in scientific notation

Determine the mass of fuel required for the expected energy consumption in the united states for the next ten years. energy use per person per year in the united states = 3.5 x 1011joules base calculations on current population of 310,000,000.

The lab procedure involves several factors, listed below some were variable and some were constant. label each factor below v for variable ot c for constant

506g of hi produce how many grams of i2?