Regarding the topic moles, when do we know whether they want us to multiply with the number of atoms and the Avogadro's number or just divide/multiply by the Avogadro's number only.

If a particular ore contains 55.1 % calcium phosphate, what minimum mass of the ore must be processed to obtain 1.00 kg of phosphorus? Express your answer with the appropriate units.

When in the presence of water, how does a phospholipid orient itself? What property of water initiates this reaction?

How does increasing the temperature affect a reaction? A. An increase in temperature increases the reaction rate. B. An increase in temperature slows down the reaction. O C. An increase in temperature lowers the reaction's activation energy. O D.

Water is added to liquid isopropanol (a polar liquid) to form a solution of rubbing alcohol. Describe what happens on the molecular level as the water dissolves in the isopropanol.

How are the number of protons represented in the periodic table? a. atomic mass b. mass number c. atomic number d. isotope

In the following atomic model, where does the strong nuclear force happen? А B с -0 outside A between A and B between B and C O inside C

Which groups of elements on the periodic table form metal ions that do not require roman numerals in their names?

Write the Chemical formula for the conjugate base of the following Bronsted-Lowry acids. A) H2SO4 B) HPO4^2-

The heat from the bonfire is transferred to the student's hands through the process of

How many atoms are present in 0.0845 moles of tungsten (W) ?