N a neutral calcium atom, there are 20 protons, 20 neutrons, and 20 electrons. If a calcium atom loses 2 electrons, what would be the calcium's atom's charge?

In a closed system containing three different gases as shown, X2 + Y2 2XY. Choose the TWO things that MUST happen as the volume of the system is decreased at constant temperature. 1) The relative concentrations of each gas must change.

Where are the most non-metals located on the Periodic Table?

How many moles of aluminum oxide can be made if 5.23 mol Al completely react

What can you do if you tried to separate a mixture of two substances (A and B) but both components traveled with the solvent front?

How can an unsaturated solution of a solid be made saturated? a. increasing the temperature of the solvent b. decreasing the temperature of the solvent c. stirring the solution d. removing solute

When magma intrudes parallel to another rock layer, the formation is called a (n) A. sill. B. dike. C. extrusion. D. unconformity.

What is the net amount of energy released when 1 mole of H2O is produced

Why is Sn (SO4) 2 named Tin (IV) Sulfate and not Tin (II) Sulfate?

An element x forms an iodide (xi3) and a chloride (xcl3). the iodide is quantitatively converted to the chloride when it is heated in a stream of chlorine: 2xi3+3cl2â2xcl3+3i2 if 0.5500 g of xi3 is treated, 0.2596 g of xcl3 is obtained.

When you kick a soccer ball across a field it will eventually come to a stop. Does this prove or disprove Newton's first law of motion? It disproves Newton's first law of motion because gravity is stronger than friction.