Which of the following is a pure substance?

brass

sodium

rocks

steel

Aspirin is the analgesic acetylsalicylic acid C9H8O4. What is the coefficient of oxygen in the balanced equation for the combustion of solid acetylsalicylic acid to carbon dioxide and liquid water? a. 3. b. 2. c. 1. d. 4. e. 8. f. 7. g. 9. h. 10. i.

Why is the surface of sodium only shiny when it is freshly cut?

What are the phase change names for liquid to solid

what discovery led to the abandonment of the atomic mass as the determining factor for organizing elements in the periodic table? A. isotopes B. Positive nuclear charge C. Ions. D. Quantum mechanics

What property of matter best describes the way a typical alcohol thermometer works?

To what chemical reaction class does this reaction belong? 2 mg (s) + o2 (g) 2 mgo (s)

Which best illustrates how particle arrangement changes when solids change into liquids

Express in scientific notation (6.0x10^4) (3.1x10^-1)

How do you measure the mass of a liquid?

Given the following information, calculate the mass for B-11. B-10 has a natural abundance of 19.9 percent, while B-11 has a natural abundance of 80.1 percent. The mass of B-10 is 10.013 amu.