Why is evaporation of water a physical change? In terms of substances, why is evaporation of water a physical change and not a chemical change?

Calculate the dipole moment for hf (bond length 0.917 å), assuming that the bond is completely ionic.

As you sit in a chair in what direction (Or directions) does the chair exert a force on you A) upward only B) sideways only C) downward only D upward and downward

A 3.75 g sample of limestone, CaCO3, contains 1.80 g of oxygen and 0.450 g of carbon. What mass of calcium is present in the sample? a. 1.00 g b. 1.25 g c. 1.50 g d. 1.75 g e. 2.00 g

Static electricity is the buildup of electric charges. Which of the following is an example of the natural discharge of static electricity? A. ocean waves B. earth's magnetic poles C. northern lights D. lightning

How many atoms are present in a 1.0 mole sample of potassium perchlorate (KClO3) ?

A chemical base may be defined as a compound which contributes hydroxide ions or increases the OH concentration when dissolved in water. True False

Correct name for LiCl

What is anisotropy. Explain briefly with example.

Which is measured using a calorimeter

5) Solid lithium metal is added to an aqueous solution of magnesium chloride forming lithium chloride solution and solid magnesium a. If you begin the reaction with 15.0 g of lithium and 25.