An atom has a mass number of 27 and 14 neutrons. what is the atomic number of this atom?

Check Sodium inside a star is most likely formed by which process? fission fusion <<--? alpha emission Beta emission

How many moles of mgcl2 are there in 336 grams of the compound

If you place a crystal substance on a tabletop, return to view it after some time passes, and find it as a powdered substance, which of the following processes most likely took effect? A. Efflorescence B. Distillation

The atomic mass of an element whose atoms consist of eight protons, nine neutrons, and eight electrons is 8 16 17 25

The action of a catalyst can be explained in the following manner: The catalyst lowers the temperature of the reactants. The catalyst takes no part in the reaction but serves as a buffer between reactants and products.

Which gas sample at STP has the same total number of molecules as 2.0 liters of CO2 (g) at STP

Benzene contains only carbon and hydrogen and has a molar mass of 78.1 g/mol. Analysis shows the compound to be 7.44% hydrogen by mass. Find the empirical and molecular Formula of benzene.

What is the Lewis structures for Ca (OH) 2

Compare and contrast homogeneous and heterogeneous mixtures using key terminology, and provide at least three examples of each. For example, explain what the mixture is comprised of and what makes it homogeneous or heterogeneous.

Which element would most likely have chemical properties similar to that of fluorine (F) ?