Atomic number and mass of O

Suppose you were dissolving a metal such as zinc with hydrochloric acid

The solvent in the developing tank is only 1 1/2 cm high and the samples are spotted at about 3 cm. why is it important to keep the spots above the solvent? explain precisely.

How many atoms of phosphorus are in 4.5 grams of tetraphosphorus decoxide?

Which of these represents the correct electron configuration for carbon?

Which of the following correctly compares the radii of Na and Na+? A. Na has a smaller radius than Na + because Na has expanded its electron cloud. B. Na has a larger radius than Na + because Na has lost its outermost energy shell. C.

To show the electron configuration for an atom, what is the advantage of using an orbital notation compared to a dot structure? Orbital notation takes up less space. Orbital notation shows the spin of the electrons.

What happens to a container of gas when the pressure is increased?

Which statement is true about a base when it reacts with another substance? a. It receives a hydrogen ion. b. It receives a hydroxide ion. c. It donates a hydrogen ion. d. It donates a hydroxide ion.

Which sample at STP has the same number of atoms as 18 liters of Ne at STP

An acidic solution could have a pH of