Why is it important for scientists to use a classification

What is the mass (in grams) of 9.44 * 10 to the 24th power molecules of methanol (CH3OH) ?

Methane burns in oxygen to produce carbon dioxide and water. Which of the following represents a preliminary, unbalanced equation with the correct chemical formulas? 1. CH4 + O2 → CO2 + H2O 2. CH4 + CO2 → O2 + H2O 3. CO2 + H2O → CH4 + O2 4.

The circulatory system transports oxygen and nutrients to cells of the body. What does it remove from the body? A. oxygen B. carbon dioxide and other wastes C. blood D. capillaries

How was the work of Newlands similar to that of Mendeleev on the periodic table? A) They both arranged the elements in order of increasing atomic mass. B) They both arranged elements that had similar properties into groups.

If the solubility of a gas in water is 2.4 g/l when the pressure of the gas above the water is 5.0 atm what is the pressure of the gas above the water when the solubility of the gas is 1.0 g/l

Lake michigan holds 1.35 x 10^15 gallons of water

N which orbitals would the valence electrons for selenium (Se) be placed? s orbital and f orbital s orbital only s orbital and p orbital d orbital only

Anne prepares a solution of copper nitrate with a concentration of 30 g/dm³. What mass of copper nitrate did she add to 100cm³ of water, in grams?

Chemists classify an element an element as a metal based on what physical properties

What is the mass of 222 ml of ice if the density of ice is 0.92 g/ml?