Explain why a propane torch is lit inside a hot air balloon during preflight preparations. Which gas law applies?

A swimming pool measures 50.0 meters by 25.0 meters. How many grams of water are needed to fill the pool, whose average depth is 7.6 feet? Assume the density of water to be 1.0 g/mL. Use significant figures. Use "E" for scientific notation.

Can be anything an organism this is to protect itself from severe weather or other dangerous conditions

Which is the correct order of the celestial bodies during a solar eclipse? A. Sun, Moon, Earth B. Sun, Earth, Moon C. Moon, Earth, Sun D. Moon, Sun, Earth

What occurs when a coordinate covalent bond is formed between nitrogen and hydrogen in the ammonium ion, NH4+?

A prehistoric pharmacist might have been called a a. shaman. b. pharmakon. c. golem. d. tourista.

Calculate ∆h0 for the following reaction. br2 ( g. → br2 (l) ∆hf0 br2 ( g. = 30.91 kj/mol; ∆hf0 br2 (l) = 0 kj/mol)

Ethyl alcohol has a latent heat of vaporization of 850 J/g. Water has a latent heat of vaporization of 2260 J/g. Container A contains 1.0 kg of ethyl alcohol. Container B contains 1.0 kg of water. Both liquids are brought to a boil.

The greatest composition by mass in an atom 17/8 O is due to the total mass of its

1. What is the criteria' for designating an object an asteroid?

Extend E1 Explain why the arrangement, movement and energy of particles change during changes of state.