Which of the following pairs of substances best illustrates the law of multiple proportions? A. H2 and O2 B. NO and NO2 C. P2O5 and PH3 D. CaCl2 and CaBr2 NO and NO2 best illustrates the law of multiple proportions.

Determine the volume (in liters) of 1.77 M H2SO4 stock solution require to obtain 0.325 mol H2SO4. Enter the numerical answer in decimal notation. Do not include the units.

If 2 moles of each of the following fuel undergoes combustion, which will yield the greatest amount of carbon dioxide? a. Ethanal b. 3-pentanone c. 2-butanone d. To difficult to figure out.

Are protons and neutrons the same size? Explain.

Suppose a student performed the trial 1 experiment in his classroom laboratory. After adding the magnesium, he forgot to close the lid. How do you expect his final temperature after the reaction will compare to the one you measured in this lab

A solid block of exactly 100.0 cm3 has a mass of 153.6 g. determine its density. will the block sink or float on water?

How many litres of 0.215 m NaCl contains 4.30 mol of this salt? Assume this solvent is H2O I'm confused on this question because little m is molality but when I looked this up on google, someone solved the problem assuming it was molarity

How can a neutral atom become a positively-charged particle?

The last column of the periodic table contains the noble gases, elements that do not easily form chemical bonds.

When pollution is removed from the air by a natural process, it

What atomic property is different in each isotope of an element?