How much energy would be released if 1.0 g of material were completely converted into energy?

Using this formula E = mc2, which is the formula formulated by Albert Einstein to get the energy where E is the units of energy, m is the mass and c is the speed of light. We can say that 1 g is equivalent to 0.001 kg. The speed of light is 38. Substituting these values to the formula, we can get 90 terajoules.