A sample of NO2 occupies 16,500 mL at STP. How many NO2 molecules are in the sample?
1. 5.88 × 1022 NO2 molecules
2. 9.11 × 1023 NO2 molecules
3. 7.65 × 1025 NO2 molecules
4. 4.43 × 1023 NO2 molecules
5. 2.00 × 1024 NO2 molecules

When will le chatelier's principle come into effect? at the beginning of a reaction, when there are only reactants when a reaction has reached chemical equilibrium when a catalyst is added to a reaction mixture when a reaction is occurring but not yet at equilibrium

Match each object to its description: a. coma of a comet b. comet tail c. oort cloud haze surrounding a nucleus created by solar wind. hypothetical sphere around the solar system

Remember to use the proper number of significant figures and leading zeros in all calculations.gelatin has a density of 1.27 g/cm³. if you have a blob of gelatin dessert that fills a 2.0 liter bottle, what is its mass? 2540 g2500 g3.9 x 10-43.937x 10-4