What is an element that has more valence electrons than fluorine and less energy levels than sodium?

All of the following are examples of matter except A) heat. B) air. C) water. D) salt. E) plants.

How many moles of the metal carbonate are needed to make this number of moles of carbon dioxide?

Is a specimen a monocot or dicot

Which part of making a solution always releases energy? a. separating the solvent particles from one another b. mixing the solute and solvent particles c. separating the solute particles from one another d. the overall change in forming the solution

A graduate student working toward a PhD in Chemistry discovers an efficient, powerful redox reaction involving an uncommon combination of chemicals.

Chemistry is the study of matter true or false

Which of the following reactions are redox reactions? a. Al (s) + 3Ag + (aq) →Al3 + (aq) + 3Ag (s) b. SO3 (g) + H2O (l) →H2SO4 (aq) c. Ba (s) + Cl2 (g) →BaCl2 (s) d. Mg (s) + Br2 (l) →MgBr2 (s)

How many liters of water are required to dissolve 1.00 g of barium chromate? express your answer in liters to three significant figures?

Cartography is the science of

If a sample of gas occupies 400 ml at a pressure of 800 mm Hg, what will be it's volume if the pressure is reduced to 700 mm Hg