Hey, please I need help Dessert crêpes are made extra tasty when flambéed with a small amount of cognac. the alcohol in the cognac burns according to the following equation:
CH₃CH₂OH(aq)+O₂= CO₂(g)+H₂O(g)
ethanol
calculate the masses of the remaining compounds in the reaction if 12g of ethanol is used.

Fission of uranium-235 products energy and a. isotopes of smaller elements b. isotopes of larger elements c. lighter isotopes of uranium d. heavier isotopes of uranium

Which statement best describes the relationship between period and frequency of light waves? a) in wave b the period increases and the frequency decreases from wave a. b) in wave a the period increases and the frequency decreases from wave b. c) in wave b the period is shorter and the frequency is greater than in wave a. d) in wave a the period is shorter and the frequency is greater than in wave b.

Which property of a rock remains unchanged by mechanical weathering? a. total surface area b. size and shape c. mineral composition d. sharpness