Which is not a formula for a diatomic molecule? N2 O3 He

Which of the following choices is the most conclusive in determining whether a chemical reaction has taken place?

In the following reaction, what is the effect of adding more NO2 to the starting reaction mixture? 2NO2 (g) ⇌ N2O4 (g) It would increase the final quantity of products It would decrease the final quantity of products It would slow the reaction down

0.205 mol of AlPO4 contains how many oxygen atoms?

What are some differences between an "ideal" gas and real gases?

Which of the following chemical equations represents an oxidation-reduction reaction? A. Mg (OH) 2 + 2HCl →MgCl2 + 2H2O B. BiCl2 + Na2SO4 →2NaCl + BiSO4 C. CH4 + 2O2→CO2 + 2H2O D. 3NaOH + H3PO4→Na3PO4 + 3H2O

A molecule of an unsaturated hydrocarbon must have 1) at least one single carbon-carbon bond 2) at least one multiple carbon-carbon bond 3) two or more single carbon-carbon bonds 4) two or more multiple carbon-carbon bonds

A 8.85 g sample of hydrate of sodium carbonate, Na2CO3 ∙ XH2O was heated carefully until no more mass was lost from the sample. After heating, the final weight of the material was 7.55 g. How many moles of water left the compound? 0 moles

PF3Br2 is a nonpolar molecule. Based on this information, determine the F-P-F bond angle, the Br-P-Br bond angle, and the F-P-Br bond angle. Enter the number of degrees of the F-P-F, Br-P-Br, and F-P-Br bond angles, separated by commas (e. g.

Using your periodic table identify the radioactive isotope;

What is the ∆G for the following reaction under nonstandard conditions for the formation of NH4NO3 (s) ?. 2NH3 (g) + 2O2 (g) NH4NO3 (s) + H2O (l). Given:. NH4NO3: ∆Hf = - 365.56 kJ ∆Sf = 151.08. NH3: ∆Hf = - 46.11 kJ ∆Sf = 192.45. H2O: ∆Hf = - 285.