Which actions represent endothermic reactions? Check all that apply.

Why the atomic mass of the copper is not exactly equal to 64

Compared to an electron, which particle has a charge that is equal in magnitude but opposite in sign? (1) an alpha particle (2) a neutron (3) a beta particle (4) a proton

Starting with the unbalanced equation for the combustion of butanol c4h9 (g) + o2 (g) co2 (g) + h2o (1)

When is there no solution to a compound inequality?

Avogadro's number represents which of the following? one mole of representative particles 6.02 x 1023 moles of representative particles 6.02 x 10-23 representative particles one representative particle

In the periodic table, a set of properties repeats from

Consider the model of the nitrogen atom. Which electron configuration matches this model? 1s22s22p2 1s22s22p3 1s22s22p4 1s22s22p5

In this experiment, you need to examine the idea of thermal energy transfer. Using a controlled experiment, .

What is the pressure of 2.3 moles of carbon dioxide gas stored in a 2 liter container at a temperature of 423 K? Given: a = 3.59 liters2 ∙ atmospheres/mole2, b = 0.0427 liters/mole, and R = 0.08205 liters∙atmospheres/K∙mole 37.22 atm 41.96 atm 79.

A bird is flying north at 18 m/s. A gust of wind from the North exerts an unbalanced force on the bird. What will happen to the bird's speed?