Looking at the periodic table, which pair of elements will have the same number of valence electrons? A. silicon and germanium B. nitrogen and oxygen C. silicon and phosphorus D. hydrogen and helium

How do the amino acids lysine and alanine combine to form a dipeptide?

Which event occurs during a high tide?

How many grams of water would there be in 100.0g of hydrate? How many moles? Mass of the hydrate 0.946g Mass of the anhydrous CuSO4 0.614gCuSO4 Mass of water driven off? 0.347g H2O The percent water in the hydrate 36.0%

When you balance a chemical equation, what are you doing? A. applying the law of conservation of energy B. applying Mendeleev's law C. applying the law of conservation of matter D. applying the periodic law

Fairly warm but windy outside what the wind chill factor to explain why it may be a good idea to wear a jacket.

What happens to the velocity of a sound wave in air if the temperature of the air increases

Determine the [oh-] concentration of a 0.741 m koh solution at 25°c.

In the lab, students decomposed a sample of calcium carbonate by heating it over a Bunsen burner and collected carbon dioxide according to the following equation: CaCO3 (s) CaO (s) CO2 (g) (a) How many mL of carbon dioxide gas were generated by the

J. J. Thomson A) Electrons are in orbital levels. John Dalton B) Atoms are the smallest unit of an element. Ernest Rutherford C) Electrons are scattered within the atom. Niels Bohr D) Protons are at the center of an atom.

Which answer best describes an alloy