How many valence electrons does nitrogen have?

elf-contained self-rescue breathing devices convert CO2 into O2 according to the following reaction: 4KO2 (s) + 2CO2 (g) → 2K2CO3 (s) + 3O2 (g) How many grams of KO2 are needed to produce 100.0 L of O2 at 20.0 °C and 1.00 atm?

What is the mass number of a carbon isotope that consists of 6 protons 6 electrons and 8 neutrons

Which of these elements is unlikely to have a reaction with any element or compound? rubidium (Rb) magnesium (Mg) cobalt (Co) argon (Ar)

Calculate the number of representative particles in 11.5 molecules of KBR

The experiment that shot heavy particles at a thin sheet of gold foil was responsible in leading to the discovery of the A. atom. B. neutron. C. electron. D. nucleus.

Which of the following equations represents a double-displacement reaction? A. FeS (s) + 2HCl (aq) ® H2S (g) + FeCl2 (aq) B. 2Sb (s) + 3I2 (g) ® 2SbI3 (s) C. Zn (s) + H2SO4 (aq) ® ZnSO4 (aq) + H2 (g) D. 2HgO (s) ® 2Hg (l) + O2 (g)

Consider the Williamson ether synthesis between 2-naphthol and 1-bromobutane in strong base. A reaction was performed in which 0.51 g of 2-naphthol was reacted with a slight excess of 1-bromobutane to make 0.29 g of 2-butoxynaphthalene.

How many molecules of n2 are in a 300.0 ml container at 780 mmhg and 135°c?

Why is gas able to flow

Identify the atom whose nucleus is composed of 56 protons and 82 neutrons