Is CO2 an empirical formula, a molecular formula, or both?

What volume of 11.80 mol/dm3 HCl needed to make 1 dm3 of 0.5 mol/dm3 aqueous HCl.

Which elements have the quantum numbers (4,3,-2,+1/2) and (5,2,-1,-1/2)

Of the major types of organic compounds found in the body, which type is used to make enzymes, to make structural molecules such as collagen, and nearly always has complex, 3-dimensional structures

The effective nuclear charge for an atom is less than the actual nuclear charge due to A) shielding. B) penetration. C) paramagnetism. D) electron-pair repulsion. E) relativity

Of the different states of matter listed below, which is typically the most dense? a. gas b. solid c. liquid d. plasma

It is often necessary to prepare a dilute solution from a more concentrated solution rather than starting from a solid and just dissolving it then adding water. This technique is called serial dilution.

Zinc metal reacts With hydrochloric

In the equation: 23491Pa → 234 92U + X The X represents a

Does adding coefficients to a chemical equation disobey the law of definite proportions? Explain your answer.

A compound contains 57.2 percent carbon, 6.1 percent hydrogen, 9.5 percent nitrogen, and 27.2 percent oxygen. What the empirical formula of the compound?