How

many moles are in 8.5 •10^25

Under ordinary conditions of temperature and pressure, the particles in a gas are

Which substance absorbs 58.16 kJ of energy when 3.11 mol vaporizes? a) CH4 b) H2S c) CO2 d) NaCl

The number placed in front of a formula is called a coefficient. the small number within a chemical equation formula is called a subscript. why do we adjust coefficients when balancing chemical equations and not subscripts?

Tim has a bottle of Oxygen being stored in his garage. When he checks the pressure on the tank he finds that it is under 2900 mmHg. He finds the density of Oxygen is 1.43 g/L. What is the temperature in Celsius of the room

The table below gives the data that is needed to calculate the average atomic mass of element B. Isotope Atomic mass (amu) Relative abundance (%) B-10 10.01 19.91 B-11 11.01 80.09 Based on these data, what is the average atomic mass of element B? 10.

Why is tape attracted to my skin? Give explanation

Food deteriorates more slowly in a refrigerator because

What occurs in a chemical reaction? Products are formed from reactants by the breaking and forming of new bonds. Products are formed without chemical bonds being broken. Reactants are formed without chemical bonds being broken.

What information does the atomic mass of an element provide

The following diagram represents a vertical cross section of sedimentary rock layers that have not been overturned. Which principle best supports the conclusion that these layers have undergone extensive movement since deposition?