If 37.18g of MgCl2 and 4.81 * 10^22 atoms of Cr are mixed and heated a reaction forming pure magnesium occurs as follow:

3 MgCl2 (aq) + 2 Cr (s) —> 3 Mg (s)+ 2 CrCl3 (aq)
Calculate the energy required or released using both reactants and circle the correct value.

Mg = 24.39 g/mole Cl = 35.45 g/mole Cr = 52.00 g/mole

Select the correct answer. when carbon dioxide dissolves in water, it sometimes reacts with water to form carbonic acid as in this balanced equation: co2 + h2o → h2co3. if 495 milliliters of carbon dioxide at 25°c and 101.3 kilopascals reacts with excess water, what is the theoretical yield of carbonic acid? use the periodic table and the ideal gas resource a. 0.889 g b. 1.10g c. 1.27g d. 2.02g what's the answer! quick!

24. a sports ball is inflated to an internal pressure of 1.85 atm at room temperature (25 °c). if the ball is then played with outside where the temperature is 7.5 °c, what will be the new pressure of the ball? assume the ball does not change in volume nor does any air leak from the ball a) 0.555 atm b) 1.74 atm c) 1.85 atm d) 1.97 atm

The twister and runaway train are two coasters at the same amusement park. both coasters start at the same height. the coaster for the twister is twice the mass of the coaster for the runaway train. which roller coaster has greater gravitational potential energy at the start of the ride?