What did alchemist contribute to the development of chemistry

If a certain gas occupies a volume of 14 LL when the applied pressure is 7.0 atmatm, find the pressure when the gas occupies a volume of 3.5 LL. Express your answer to two significant figures and include the appropriate units.

Which of the following elements is a nonmetal? a. selenium (Se) b. yttrium (Y) c. barium (Ba) d. calcium (Ca) e. All of these are metals.

1. Calculate the molarity of 35g of calcium chloride (CaCl2) that is dissolved in 850ml of water. (Calculate moles first) a. 0.27M b. 0.38M c. 0.32M d. 0.80M 2. Calculate the molarity of 90g of copper sulfate (CuSO4) when dissolved in 5 L of water.

How do you find the pH of the compound KCl?

Which of the following is a heterogeneous mixture A) A hot cup of coffee B) Hot tea C) A milk chocolate bar D) A fruit salad

Four type of molecular models

How many particles are in 1 mol of carbon? 1 mol of lithium? 1 mol of eggs? will 1 mol of each of these substances have the same mass?

An organic chemist plans for the synthesis of a complex organic molecule by

Which societal problem can be solved in part by scientist identifying areas of high biodiversity

How many water molecules (H2O) can be produced from 6 molecules of hydrogen gas (purple) reacting with 6 molecules of oxygen gas (turquoise) ? Which reactant is the limiting reactant? Oxygen and hydrogen molecules A.