A system used to represent the valence electrons around the chemical symbol of an element is the

A reaction that absorbs heat from the surroundings is known as a (n) A) exothermic reaction. B) endothermic reaction. C) displacement reaction. D) decomposition reaction

An ideal gas in a 1.25-gallon container is at a temperature of 125 degrees Celsius and pressure of 2.5 atmospheres. If the gas is oxygen (formula:O2 molecular weight = 32 grams per mole), what is the mass of gas in the container in units of grams?

What is oxidized and what is reduced in this reaction? N2H4 (l) + 2H2O2 (l) → N2 (g) + 4H2O (g) N is reduced and H is oxidized. N is reduced and O is oxidized. N is oxidized and O is reduced. N is oxidized and H is reduced.

How many seconds are in 1 minute

How many vibrational modes does ethanol have? Explain why.

If 1.00 mol of argon is placed in a 0.500-L container at 20.0 ∘C, what is the difference between the ideal pressure (as predicted by the ideal gas law) and the real pressure (as predicted by the van der Waals equation) ? For argon, a=1.

Part 2: Finding Speed and Height Using Energy Directions: Use the KE and GPE equations to solve for speed or height depending on the situation. 1. A 1,000-kg car has 50,000 joules of kinetic energy. What is its speed? 2.

Why is conductivity be the best test to find a metal, non-metal or metalloid?

In which way does a na1 + ion differ from a neutral na atom?

Which would not be associated with stable atmospheric conditions afternoon thunder showers is the answer