Moving from left to right across a row of the periodic table, which of the following values increases by exactly one from element to element?
a. isotope number
b. atomic number
c. atomic mass unit
d. mass number

If the particles in a sample of matter have an orderly arrangement and move only in place, the sample is a

Base your answer on the information below and on your knowledge of chemistry. nitrogen dioxide, no2, is a dark brown gas that is used to make nitric acid and to bleach flour. nitrogen dioxide has a boiling point of 294 k at 101.3 kpa. in a rigid cylinder with a movable piston, nitrogen dioxide can be in equilibrium with colorless dinitrogen tetroxide, n2o4. this equilibrium is represented by the equation below. 2no2(g) n2o4(g) + 58kj at standard pressure, compare the strength of intermolecular forces in no2(g) to the strength of intermolecular forces in n2(g).

Asolution contains 180 g of glucose (c6h12o6) and 162 g of water. what is the mole fraction of glucose?