What 3 atoms have eight valence electrons

In two or more complete sentences, explain how to calculate the amount of energy that is transferred when 150 g of cooper cools from 63.0 °C to 21.0 °C. Is the energy absorbed or released? The specific heat of copper is 0.387 J/g*°C.

A bottle of fertilizer contains a 6.0 M solution of ammonium nitrate (NH4NO3). If you wanted to fertilize your garden with 15.0 L of a 0.18 M solution, what quantities of the liquid fertilizer and water would you mix together to spray on your garden

The mass of an object is

What two things must you specify when describing the velocity of an object

What determines the type of atom

Is a sodium cation smaller or larger than a sodium atom

What would the charge be on an atom with 9 protons 9 electrons and 10 neutrons

PH + pOH = 14. What is the hydroxide concentration of a solution with pH of 8?

A student Increases the temperature of a 417 cubic centimeter balloon from 278 K to 231 K. Assuming constant pressure what should the new volume of the balloon be

What is the molarity of a solution with 1.17 moles of Ca (OH) 2 disolved in 0.2 liters of water? A. 1.17 M B. 0.2 M C. 0.17 M D. 5.85 M