Atoms of Ca and S would be expected to react in a ratio of

A) 1:1

B) 1:2

C) 2:1

D) 3:1

The use of more advanced tools made of stone, wood, and bone, such as the ones illustrated below, was typical of which period of human history? a. Paleolithic era b. Neolithic era c. Bronze Age d. Iron Age

1. What structural property of sodium 4-amino-1-naphthalenesulfonate makes it very soluble in water? 2. You will have to look up the structure of this compound and comment on why it is water-soluble. Simply stating that it's polar

22.99 on the element sodium means the combined numbers of electrons and protons?

The general formula for the alkane series is:

Which postulate of Dalton's atomic theory is the result of the law of conservation of mass

Teflon is prepared by the polymerization of tetrafluoroethylene. Write the equation that describes the polymerization using Lewis symbols.

Why is there no set path that a scientific inquiry must follow

Which of the following is a chemical property of vinegar? A. The pH of vinegar is around 2.4. B. Vinegar freezes at around 2°C. C. Vinegar boils at about 100°C. D. The color of vinegar ranges from colorless to brown. E.

Which best describes the mass of protons, neutrons and electrons

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.