How the do the lewis structure

What types of gas molecules typically diffuse and effuse faster?

Magnetic poles are called domains. True False

A trend in the periodic table means?

Which of the following electron configurations for neutral atoms is correct? magnesium: 1s 2^2s 2^2p 6^3s 2^3p^6 argon: 1s 2^2s 2^2p 6^3s 2^3p^6

In the reaction Mg (s) + 2HCl (aq) H2 (g) + MgCl2 (aq), how many moles of hydrogen gas will e produced from 75.0 milliliters of a 1.0 M HCl in an excess of Mg?

Why are some mystery elements easier to identify than others?

Which of the following processes is exothermic (heat or energy is released) ? A) ice melting in a beverage B) dry ice (solid CO2) converting to a gas at room temperature C) evaporation of water from a mud puddle D) burning propane in a barbeque

What is one way to increase the dissolution rate of a sugar cube? a) crush the sugar cube into smaller pieces b) add more sugar cubes to the solvent c) increase the pressure on the solution d) decrease the temperature of the solution

Vitamin A is a very large organic molecule composed of twenty atoms of carbon, one atom of oxygen and thirty atoms of hydrogen. How many atoms total are in TWO molecules of vitamin A. Select one: 84 68 34 102

How many moles of nitrous oxide gas (N2O) is contained in 20.0 L balloon at a pressure of 1.09 atm and a temperature of 298K?