Scenario: You are testing two different household solutions with your cabbage indicator, using the color key to the right. One solution turns blue. A possible hydrogen ion concentration for this solution is: 1 × 10-2 M 5 × 10-2 M 5 × 10-4 M 1 × 10-8 M

Use the standard enthalpies of formation for the reactants and products to solve for the δhrxn for the following reaction. (the δhf of c2h4 is 52.26 kj/mol, co2 is -393.509 kj/mol, and h2o is -241.818 kj.) c2h4 (g) + 3o2(g) 2co2 (g) + 2h2o(g) δhrxn = the reaction is .

Suppose a lab group reports a ppercent yield of sand of 105. is it really possible to collect more sand than was originally represented? what is the possible explanation for the extra product?

This classification of drug typically changes the brain's chemistry and reduces its ability to create its own endorphins.