A crystallographer measures the horizontal spacing between molecules in a crystal. The spacing is

13.9

nm

. What is the total width of a crystal in millimeters

105

molecules across? Write your answer as a decimal.

Why is iron placed in the d-block of the periodic table?

Based on your understanding of the periodic table, which element has the greatest number of electrons A. Uranium B. Sodium C. Selenium D. Polonium

A method of lowering the concentration of HCl (aq) is to allow the solution to react with a small quantity of Mg. How many milligrams of Mg must be added to 219 mL of 1.032 M HCl to reduce the solution concentration to exactly 1.000 MHCl

Explain how an increase in the temperature causes an increase in the solubility of most solids and liquids

What is the process used to measure out a specific mass of a solid

Complete the following statement by checking all that apply Creativity allows scientists to develop multiple approaches to solving problems. adapt to changes in scientific knowledge. look at old problems in new ways.

The atomic weight of hydrogen is 1.00794. a. True b. False

Describe What kind of ions do metals form? What kind of ions do nonmetals form?

A car is driven through streets treated with salt and then parked in a warm garage. a) How will the rate of rusting compare with a car that has not been driven in the streets treated with salt but left parked outside?

Amalgam is an alloy that contains mercury and other metals. Which of these atoms would most likely form metallic bonds with mercury? Check all that apply. bromine copper hydrogen iodine silver tin