Chemistry Homework Help

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Physical & Chemical Properties

Q. Name of compound: BaCl2.2H2O (not CaCl2.2.H2O) Gram Formula Weight = 244 g/moles Grams of compound used: 10.370 g Moles of compound used: 0.0425 moles Total grams of water used = 75.000 grams Freezing point of pure water: 0oC Observed freezing pint of solution= -3.1oC What is the general term for any property that is influenced by the number of solute “particles” in the solution?

Solved • May 1, 2020

Physical & Chemical Properties

Q. A chemist is given an unknown gas sample. Which observation describes a chemical property of the sample? A. It extinguishes a glowing splint B. It has a sharp, stinging odor C. It is colorless D. Its density is greater than that of air E. It weighs 11.2 grams

Solved • Feb 7, 2020

Physical & Chemical Properties

Q. b) How could you discover if there is salt dissolved in the water?

Solved • Jan 29, 2020

Physical & Chemical Properties

Q. Which type of property is involved in this separation? a) chemical property b) physical property

Solved • Jan 29, 2020

Physical & Chemical Properties

Q. a) Suggest a way to determine if the colorless liquid in a beaker is water. (Select all that apply.) a) check the mass b) check the turbidity c)check the boiling or freezing point d) determine the density

Solved • Jan 29, 2020

Physical & Chemical Properties

Q. You are given a sample of a silvery metal. What information could you use to prove the metal is silver? (select all that apply) a) melting point b) color c) mass of the sample d) density

Solved • Jan 29, 2020

Physical & Chemical Properties

Q. Iron pyrite (fool's gold, figure below) has a shiny, golden metallic appearance. Crystals are often in the form of perfect cubes. A cube 0.31 cm on each side has a mass of 0.040 g. d) Which of the observations are intensive? a) color b) length c) luster d) mass d) crystalline

Solved • Jan 29, 2020