*PLEASE HELP* Your barbecue grill uses propane (C3Hg) to cook your food while butane (C4H10) is used in chemistry laboratories to perform experiments. Write an equation for hydrocarbon combustion for each of the gases and then balance.

Are these reactions endothermic or exothermic? How do you know?

Assume that the gases burn clean and completely, calculate the energy released by each in kJ/mole.

Calculate the energy released in kJ/g. Which gas is more efficient?

Be sure to show all of your work!

The equation picture below shows which type of nuclear reaction u 235 + n x e 134 + sr 100 + 2n

Will mark as brainliest ! how many grams of iron metal do you expect to be produced when 245 grams of an 80.5 percent by mass iron (ii) nitrate solution react with excess aluminum metal? show all work needed to solve this problem!

Astudent made the lewis dot diagram of a compound as shown. mg is written with two dots shown on its top. an o is written on each side of mg. each o has six dots around it. an arrow is shown from one dot on mg toward the vacant space around the o on the right. another arrow is shown from the other dot on mg toward the vacant space around the o on the left. the title of the art is students lewis dot model. what is the error in the lewis dot diagram? an o atom should transfer all its six electrons to mg because the formula is mgo. both electrons of mg should be transferred to one o atom because the formula is mgo. the electrons should be transferred from each o atom to mg because mg has fewer electrons. the number of dots around mg should be four because it has to transfer two electrons to each o.