How many molecules are in H2O? How do you know?

How many miles are in 1.50^22 atoms of silver?

Which geologic time span covers the majority of Earth's history?

The element rubidium has two naturally occurring isotopes. The atomic mass of 85Rb (72.17 percent abundant) is 84.911794 amu. Determine the atomic mass of 87Rb (27.83 percent abundant). The average atomic mass of Rb is 85.4678 amu.

Which statement describes friction? O It is perpendicular to the surfaces that rub together. O It causes a change in motion. O It occurs in the same direction as the push force. O It pulls downward on a moving object.

If 316 mL nitrogen is combined with 178 mL oxygen, what volume of N2O is produced at constant temperature and pressure if the reaction proceeds to 82.0% yield? 2N2 (g) + O2 (g) = 2N2 O (g)

An atom containing 47 protons, 47 electrons, and 60 neutrons has a mass number of

BONUS: Wremne UwWM DU Aqueous potassium iodide is mixed with lithium phosphate to form aqueous lithium iodide and solid potassium phosphate.

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Semi-conductors have properties of both metals and non metals. which are two examples of metalloids

How do you determine the percent yield of a chemical reaction?