The electron configuration for an atom is 1 s 2 2 s 2 2 p 2. How many electrons does the atom have?

A. 6

B. 2

C. 5

D. 4

Ether has a density of 0.736 g/cm^3 at 20 degrees C. what is the volume, in liters, of 225.0 grams of ether?

Figure 1 shows a seaside cliff. Figure 2 shows the same cliff after a period of time has passed. What caused the change from figure 1 to figure 2?

Consider the reaction of aluminum chloride with silver acetate. How ml of 0.250M aluminum chloride are required to react completely with 20ml of 0.500M silver acetate?

Calculate the atomic mass if Cu-63 and Cu-65?

Find the ph of a 0.250 m solution of nac2h3o2. (the ka value of hc2h3o2 is 1.80*10-5). express your answer numerically to four significant figures.

An atom that has the same amount of atoms of each element on both sides of the reaction obeys what law

Whats the main difference between a double replacement reaction and a single replacement

When is the absorption spectrum of an electron generated?

Use the gizmo to find the concentration of the mystery ch3cooh. use the titrant and indicator shown below perform the titration.

Which describes the volume of 1 mol of gas at standard temperature and pressure? ER The volume is greater for a larger mass of gas. The volume is the same for any gas. The volume depends on the size of the container.