Which element is likely to be the most reactive? bromine (br) chlorine (cl) fluorine (fl) iodine (i)

Manganese dioxide (MnO2 (s), Hf = - 520.0 kJ) reacts with aluminum to form aluminum oxide (AI2O3 (s), Hf = - 1699.8 kJ/mol) and manganese according to the equation below. What is the enthalpy of the reaction?

Where are the alkali metals, the alkaline earth metals, the halogens, and the noble gases located on the periodic table?

A certain substance has a heat of vaporization of 67.49 kJ/mol. At what Kelvin temperature will the vapor pressure be 5.00 times higher than it was at 291 K?

What is the ion in acids that determines if they are safe to eat? I need an answer but I can't give anything because i don't know how

N2 (g) + 2O2 (g) + 2 NO2 (g) 3NO2 (g) + H2O (g) = 2HNO3 (aq) + NO (g) a. a car burns 4.00 x 10^2 g of N2. How many grams of HNO3 will be produced? b. what is the minimum amount of O2 needed in grams?

Click the DeltaH is an Extensive Property button within the activity, and analyze the relationship between the two reactions that are displayed.

The fundamental unit used to measure mass is?

What are some ways population size is limited within an ecosystem?

Which occurs when a warm fluid cools down? Energy is released to the environment. Energy is absorbed from the environment. The density of the fluid decreases. The mass of the fluid decreases.

If 3 g of element C combine with 8 g of element D to form compound CD, how many grams of D are needed to form compound CD2?