For the given balanced equation: Assume all gases at STP: C₇H₁₆ +11O₂ −−→ 7CO₂ + 8H₂O 1) What is mole ratio of oxygen gas to carbondioxide? 2)How many grams of carbon dioxide is produced if 1.5 liters of oxygen gas reacted?

All the elements are arranged by melting points on the periodic table. in row they go from metals to gasses. in the row from sodium to argon, sodium is more reactive than the one on its right, magnesium.

It is 4.92 e-4 sorry if i am wrong

Mass is the amount of matter in an object.  weight is the measurement of the pull of gravity on an object.  say for example, you travel to the moon which has a different gravitational field compared to the gravitational field of earth. (gravitational fields: earth = 1, moon = 0.165)  now when you are on the moon, the pull of gravity on you is different than on the earth. and as weight is the measurement of the pull of gravity on an object, that means yes, your weight can and will change on the moon.  however, on the moon, on earth or even on jupiter, the amount of mass inside of you remains the same. meaning your physical mass remains constant.  in conclusion it is possible for your weight to change as your mass remains constant.