To solve this problem we just need to use the rule of three:
150g..................395.1J
450g................xJ
x = 450*395.1/150 = 1185,3J
450.0 g of the substance completely reacted with oxygen will produce 1.1853 kJ(<span>kiloJoule</span>)
The density of it would be 57. Do the math and apply the formula to it and you would get this answer.
Explanation:
Methane molecule is depicted here
One is: vinegar and baking soda volcano. But a more planned, complicated experiment, would be a nuclear energy program.