A reaction occurs in a calorimeter, resulting in the starting and final temperatures shown below. What can you say about the reaction and the enthalpy change (ΔH) during the reaction? Starting: 21.0 C Final: 38.8 C

For Fe, its atomic number is 26 and its mass number is 56. How many neutrons does it have? a. 26 b. 30 c. 56 d. 82

Write an expression for the equilibrium constant of each chemical equation: a. SbCl5 (g) SbCl5 (g) + Cl2 (g) b. 2 BrNO (g) 2 NO (g) + Br2 (g) c. CH4 (g) + 2 H2S (g) CS2 (g) + 4 H2 (g) d. 2 CO (g) + O2 (g) 2 CO2 (g)

Dr. Schumacher is trying to determine if a particular kind of high blood pressure is more affected by genetics or lifestyle.

A light-year measures the distance a light beam can travel in one year. One light-year is equal to 9 500 000 000 000 kilometers.

What is Bromine gas and what does it do?

How many bonds are present in HCI? a) 1 b) 3 c) 4 d) 2

Determine the number of moles 1) 20g Na and 2) 34g H2O

Nitrogen dioxide (NO2) gas and liquid water (H2O) react to form aqueous nitric acid (HNO3) and nitrogen monoxide (NO) gas. Suppose you have 5.0 mol of NO2 and 11.0 mol of H2O in a reactor. Suppose as much as possible of the NO2 reacts.

How long does it take the Earth to rotation and revive

What is Charles' law formula?