MidTerm1_08_wyslouzil

# MidTerm1_08_wyslouzil - 1(5 pts You add 0.00015 mol of...

This preview shows pages 1–3. Sign up to view the full content.

1 1. (5 pts) You add 0.00015 mol of compound Z (Molecular weight = 54.6) to a crucible that weighs 1.0020 g. The combined weight, reported to the correct number of significant figures, is: a) 1.0 g b) 1.01 g c) 1.01019 g d) 1.010 g e) 1.0102 g 2. (6 pts) A rather large water bath has the dimensions 2.5 m × 2.2 m × 0.20 m. Determine the mass of water, in kilograms, needed to entirely fill the bath. (Density of water = 1 g/cm 3 .) a) 1.1 x 10 6 b) 1.1 x 10 3 c) 2.2 x 10 6 d) 2.2 x 10 3 e) 5.0 x 10 2 3. (5 pts) Accuracy refers to __________. a) how many significant figures a measured number has b) how close a measured number is to the calculated value c) how close a measured number is to other measured numbers d) how close a measured number is to the true value e) how close a measured number is to zero 4. (5 pts) If matter is uniform throughout, cannot be separated into other substances by physical processes, but can be decomposed into other substances by chemical processes, it is called a (an) __________. a) heterogeneous mixture b) element c) homogeneous mixture d) compound e) mixture of elements

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

View Full Document
2 5. (5 pts) The symbols for copper, chlorine, carbon, and calcium are: a) Co, Cl, Ca, C b) Cu, Cl, C, Ca c) Cu, Cl, Ca, C d) Co, C, Cb, Ka e) Cu, Ch, C, Cl 6. (6 pts) Select the combination of statements which are correct: A. The mass number of an atom is the sum of the number of neutrons and protons in the nucleus. B. The number of neutrons in an atom is its atomic number. C. Isotopes of an element differ only in the number of protons. D. The volume occupied by the nucleus is a small percentage of the total volume. E.
This is the end of the preview. Sign up to access the rest of the document.

## This note was uploaded on 10/25/2009 for the course CHEM 121 taught by Professor Wyzlouzil during the Fall '07 term at Ohio State.

### Page1 / 10

MidTerm1_08_wyslouzil - 1(5 pts You add 0.00015 mol of...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document
Ask a homework question - tutors are online