Dani has 15. 00 grams of water (c = 4. 186 joules over grams times degrees Celsius) at 66°C. She adds 40. 00 grams of water at 35°C. What is the final temperature of the liquids? Express the answer to the hundredths place. °C.

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 !

i think it's c. if you look search electronic symbol on google and then click on wiki it shows you a

the answer is 75.0%.

it would be b. 6co2 + 6h2o --> c6h12o6 + 6o2