What is the mass number of an atom which is made up of 27 protons, 33 neutrons and 27 electrons?

7.00 g of a certain Compound X, known to be made of carbon, hydrogen and perhaps oxygen, and to have a molar mass of 70. g/mol, is burned completely in excess oxygen, and the mass of the products carefully measured. 21.96 g of carbon dioxide and 8.

Mrs. Andrews did a science demonstration with dry ice. First, she placed some dry ice inside of a balloon. Then she tied off the ballon and placed it on a triple beam balance.

A solution of a compound with a known extinction coefficient of 23,100 M-1cm-1 has an absorbance of 0.735 in a 1.30cm path length, what is the concentration of the solution

Alejandra measures the mass of a cup of baking soda three times. Her measurements all exactly reflect the actual mass of the baking soda. If each measurement in a set of data has a high level of accuracy, this indicates

What is an atom and an element.

What is hydrocarbon?

Are all metals acidic in nature and all non-metals basic? and what is the nature of their oxides?

How many atoms of Hydrogen in the products of the following equation? 3NO2 + H2O - -> NO + 2HNO3 1 3 4 2

What reactants form a combustion reaction? O A. A hydrocarbon and oxygen O B. Hydrogen and water vapor O C. A hydrocarbon and water O D. Water vapor and oxygen

Is the Sun bigger and brighter than Betelgeuse?