The ethanol (C2H5OH) in 20 mL of a 7.5 M solution is burned in the presence of 15 L of oxygen at 770 mmHg and 45 oC. How many grams of the excess reactant are left over?

Explanation:

Calculating your loan-to-value ratio

Current loan balance ÷ Current appraised value = LTV.

Example: You currently have a loan balance of $140,000 (you can find your loan balance on your monthly loan statement or online account). ...

$140,000 ÷ $200,000 = .70.

Current combined loan balance ÷ Current appraised value = CLTV.

2fe + 3h2so4 -> fe2(so4)3 + 3h2

it is necessary to balance equations in order to get the proper amount of reactants as well as products in order not to make a miscalculation.

you cannot change the subscripts as that would change the substance itself. for instance, diatomic elements such as h2 only have the subscript two when a gas. another example would be so4, if you were to change the subscript, the element would no longer be sulfate.

we change the coefficients instead as that only changes the number of molecules rather than the substance itself.

hope this !