A sample of helium has a volume of 150.0 L at STP. How many moles of helium are in the container?

Balance the combustion reaction between propane and oxygen. C ₃ H ₈ + O ₂→ CO ₂ + H ₂ O

Trade in the British Empire and new inventions lead to A. the reopening of theatres. B. the birth of the Industrial Revolution. C. the loss of the American colonies. D. the end of Puritan rule.

Sodium can achieve greater stability in its valence shell by

What will be the new volume if 125 mL of He gas at 100 degree Celsius and. 979 atm is cooled to 26 degree Celsius and the pressure is increased to 1.15 atm?

Explain what happens to water when heat energy is absorbed a. Ice melts b. Liquid water freezes c. Water vapor condenses

How does the acid level in a lake affect how many fish live there?

The table below shows four samples of carbon dioxide and the temperature of the water that they were dissolved in. sampletemperature of water (°c) 178273355463which of the samples most likely had the lowest solubility?

Using the periodic table, which of the following can be predicted for an atom of chlorine? It has 35.45 protons It has 17 protons It has 35.45 neutrons It has 17 neutrons

Which of these represents a chemical change?

A chemist measures the amount of iodine solid produced during an experiment. she finds that 1.6 g of iodine solid is produced. calculate the number of moles of iodine solid produced.