Question 1 how many moles of helium are found in a balloon that contains 5.5 l of helium at a pressure of 1.15 atm and a temperature of 22.0 ºc?

About 300 B. C., Aristarchus suggested that the sun was at the center of the universe. Why? The brightness of the planets would change. The planets appeared to move among the constellations. The planets always moved opposite to the stars.

8/12A) Horace has a comparative advantage in both tasks. B) Tammi has a comparative advantage in both tasks. C) Horace has a comparative advantage in grooming dogs and Tammi in bathing cats.

How many milliliters of 10.0 M HCl (aq) are needed to prepare 790.0 mL of 1.00 M HCl (aq)

Which is NOT a major biome to know? Tundra Desert Grassland Island

Find the number of moles in 3.70 x 10^-1 g of boron. 1) What is the molar mass of boron to three significant figures? 2) What is the conversion factor you will use to convert grams of boron to moles of boron?

Write the formulas for the following compounds: (a) copper (l) cyanide, (b) strontium chlorite, (c) perbromic acid, (d) hydroiodic acid, (e) disodium ammonium phosphate, (f) potassium dihydrogen phosphate, (g) iodine heptafluoride, (h)

Name a complex salt used in silver-playing.

10. In what part of the world might you find Mystery Island (note: you will be given full-credit for simply attempting this question and you will find the actual answer in your teacher's feedback). Do not answer!

What are the spectator ions in this equation?

A quantity of 1.922 g of methanol (CH3OH) was burned in a constant-volume bomb calorimeter. Consequently, the temperature rose by 5.72°C. If the heat capacity of the bomb plus water was 9.