The nucleus of an atom contains positively charged particles, called protons, and neutral particles, called neutrons. how is the nucleus of an atom held together?

Given the balanced equation, 4 NH3 + 3 O2 Imported Asset 2 N2 + 6 H2O, what is the molar ratio of NH3 to N2?

Why does split petrol form a stick on top of water?

If the density of mercury is 13.6 g/cm3, what is mercury's specific gravity?

Round 23.455 to 4 significant digits:

The chart seen here shows the decay of a sample of carbon-14 over a period of 33,000 years. What is the approximate half-life of carbon 14?

When a bond is formed, energy is _ the atoms

Describe 2 theories for yawning

A sample of neon effuses from a container in 76 seconds. the same amount of an unknown noble gas requires 155 seconds. part a identify the gas.

2. The pressure of the oxygen gas inside a canister is 5.00 atm at 25 degrees C. The canister is placed in a freezer. If the temperature falls to - 10 degrees Celsius, what is the new pressure inside the canister? 3,41 atm 12.5 atm 4.41 atm 12.5 atm

How many kilojoules of energy are absorbed when 800.0g of water is heated from 20.0º C to 50.0º C