Is it possible to have a mixture of two elements and

Info icon This preview shows pages 2–3. Sign up to view the full content.

View Full Document Right Arrow Icon
5. Is it possible to have a mixture of two elements and also to have a compound of the same two elements? Can you think of an example? 6. Can the terms homogeneous and heterogeneous be applied to pure substances as well as mixtures? Can you think of an example? 7. Metal A dissolves in nitric acid solution. You can recover the original metal if you place metal B in the liquid. Metal A becomes heavier after prolonged exposure to air. The procedure is faster if the metal is heated. From the evidence given, can you tell if Metal A definitely is or could be an element or a compound? If you cannot, what other information do you need to make that classification? Page 3 8. The density of a liquid was determined in a laboratory. The liquid is left in an open container overnight. The next morning the density is measured again and found to be greater than it was the previous day. Is the liquid a pure substance or mixture? Explain your answer. Significant Figures: 1. Consider the following measurements . Which one(s) have a value of seven hundred fifty million? How many significant figures are shown in each? a) 7500 x 10 6 b) 7.500 x 10 8 c) 750 x 10 6 d) 750,000,000 e) 7500 x 10 8 2. Which of the following measurements have four significant figures?
Image of page 2

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
3.003 g 19.00 mL 0.0050 in 1.20 x 104mg 0.001607 ps 3. Evaluate the expression: (8.346 m + 2.854 m)( 1.2750 m) = What are the units? 4. What is the numerical value of: 1.5 cm – 7.222 x 10 -1 cm? Page 4 5. Calculate the following to the correct number of significant figures. (3.53 / 0.084)g – (14.8 x 0.046)g = _____ 6. When the masses 0.0222 kg, 140.000 g and 5888 mg are added, the total should be ______?______ reported with __?__ significant figures.
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern