A pure sample contains only nitrogen and

oxygen atoms. If the sample is 30.4% nitrogen,

by weight, what is the empirical formula

of the molecule?

Which of the following is a product formed when K reacts with Cl2? KCl K2Cl KCl2 K2

Define ph. The ph range of blood is from 7.35 to 7.45. Circle the correct answer to complete the sentence. This is slightly (acidic / basic).

Which element has a larger ionic radius than calcium? a. sodium b. gallium c. magnesium d. potassium

13. How many valence electrons does an atom with 5 electrons, 5 neutrons, and 5 protons have in its ground state? A. 5 B. 4. C. D. 3 2

What is the term for the different phases water can take?

A solution contains 0.159 mol K3PO4 and 0.941 molH2O. Calculate the vapor pressure of the solution at 55 ∘C. The vapor pressure of pure water at 55 ∘C is 118.1 torr. (Assume that the solute completely dissociates.)

When 711 J of heat is added to a 41.1 g of an unknown metal, the temperature of the metal increases from 22oC to 94oC. Calculate the specific heat of this metal

What is the formula for copper (II) phosphate? Capitalization and punctuation count. How many atoms of phosphorus are in 7.10 mol of copper (II) phosphate?

What happens to the elements Sodium (Na) and Chlorine (Cl) when they combine to form salt (NaCl)

Which of the following is the major advantage of using geothermal energy instead of using coal energy? Choice: You will get a brainliest! If your correct! A. More abundant than coal B. Easier to access than coal C. Releases less carbon dioxide D.