Correct rules for writing the chemical formulas of covalent compounds include which of the following?
a
The element that is farther to the left in the periodic
table is written first.
b
The element that is farther to the right in the
periodic table is written first.
If both elements are in the same group of the
C periodic table, the one with the lower period
number is written first.
d two of the above

Ase your answer to this question on the information below.hydrocarbons and fissionable nuclei are among the sources used for the production of energy in the united states. a chemical reaction produces much less energy than a nuclear reaction per mole of reactant.the balanced chemical equation below represents the reaction of one molecule of a hydrocarbon with two molecules of oxygen.chemical equation: ch4 + 2o2 → co2 + 2h2o + 1.48 × 10−18 jthe nuclear equation below represents one of the many possible reactions for one fissionable nucleus. in this equation, x represents a missing product.nuclear equation: write an isotopic notation for the missing product represented by x in the nuclear equation.

Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?

How many moles of water are created if 3 moles of hydrogen react completely with excess oxygen?