How many neutrons does an atom of al-27 have? (hint: look at the periodic table for the atomic number aluminum (al) 13 14 27 40 aluminum has the atomic number of 13?

Which of the following best describes what causes the phases of the moon? The alignment of the sun, Earth, and moon The speed of the moon around the Earth The speed of the Earth around the sun The alignment of the planets

In many of the steps in the lab, a mixture was centrifuged and then decanted. In general terms, what is accomplished by these steps? In what kind of situation would these steps not be able to separate two compounds?

Pre-laboratory Questions 1. Using LeChâtelier's principle, determine whether the reactants or products are favored and the direction of the shift in equilibrium (left or right) in the following examples. 2CO (g) + O2 (g)  2CO2 (g) + heat a.

Are the molecules moving faster in a glass of water steam ice

Does water have a subscript? A) yes B) no

A solution which has a concentration that exceeds its predicted solubility at a certain temperature and pressure would be -

Convert 4.992*1010 g to each of the following units. B. Mg c. mg D. metric tons

The ideal gas law shows us how a gas will behave under many conditions. The formula is: P V = n R T Where P = pressure, V = volume, n = amount of the substance, R = ideal gas constant, and T = temperature.

The Suns ultraviolent Rays can cause skin damage including sunburn and even skin

Peas contain 250 kJ per 100 g. You would use the equivalent of 600 g of peas if you slept for.