Określ typ tlenku (zasadowy, kwasowy, obojętny, amfoter)

CuO, FeO, Cr2O3, P4O10, MnO2, CaO, CrO3, SO3

According to Hund's rule, when electrons occupy orbitals of equal energy, one electron enters each orbit until A. there are two electrons in each orbital. B. electron velocities become constant. C.

What is the ph of a solution that contains 1.0 l of 0.10 m ch3cooh and 0.080 m nach3coo after 0.03 moles of naoh added?

How many grams of O2 must be placed in a 3.33 liter container in order to exert a pressure of 2.46 atm at 27°C?

Whats the difference between magnification and resolution (for science)

Is the dot structure method failproof? in other words, are there any exceptions or is this the best way to determine oxidation states for "non-obvious" compounds?

Using the following thermochemical data, what is the change in enthalpy for the following reaction? Ca (OH) 2 (aq) + 2HCl (aq) → CaCl2 (aq) + 2H2O (l) CaO (s) + 2HCl (aq) →CaCl2 (aq) + H2O (l), ΔH = - 186kJ CaO (s) + H2O (l) →Ca (OH) 2 (aq), ΔH =

Approximately how much of the world's oil and natural gas reserves are believed to be in the arctic?

Predict the precipitate produced by mixing a (n) Al (NO3) 3 solution with a (n) NaOH solution. Write the molecular equation for the reaction. (Use the lowest possible coefficients. Include states-of-matter under SATP conditions in your answer.)

What does rxns standfor?

What is the solution to the problem expressed to the correct number of significant figures? (102,900 : 12) + (170 * 1.27) = ? A. 8,790 B. 8,790.9 C. 8,791 D. 8,800