Chem Lab 110 Midterm Exam Review Problems (1).docx

**Chem Lab 110 Midterm Exam Review Problems** 1. Where are the two places you can locate the MSDS (SDS)? 2. If this is the reading on the balance, 0.40012 g, what measurement should you record in your lab notebook? 3. How do you convert from mg to g? 4. How would you remove a hot crucibl...

**Chem Lab 110 Midterm Exam Review Problems** 1. Where are the two places you can locate the MSDS (SDS)? 2. If this is the reading on the balance, 0.40012 g, what measurement should you record in your lab notebook? 3. How do you convert from mg to g? 4. How would you remove a hot crucible from the clay triangle on a ring stand after heating a substance? 5. Using the image below, please report the following: a. Length in cm: \_\_ \_\_\_ b. Length in in: \_\_ \_ c. Length in m: \_ \_ 6. Draw the Lewis structure for NH~3~ and answer the following: a. e- geometry: 7. Calculate the wavelength of an n=5 to an n=1 transition. 8. A graduated cylinder is filled with water to the 25.0 mL mark. After 27.5 g of titanium 8. \_\_\_\_\_\_ a. 0.873 g/cm3 d. 4.23 g/cm3 b. 0.87 g/cm3 e. 3.1 g/cm3 c. 4.2 g/cm3 9. The calculated diameter of a carbon atom is about 0.000000000340 m. In correct 9. \_\_\_\_\_\_\_ scientific notation, this is equal to: a. 3.40 × 10-12 km. d. 3.40 × 100 nm. b. 3.40 × 10-12 cm. e. 3.40 × 10-10 m c. 3.40 × 102 pm. 10. Which of the following is equal to exactly 1 cubic meter (1 m3)? 10. \_\_\_\_\_\_ a. 100 cm3 d. 106 mL b. 109 L e. 109 cm3 c. 1010 mm3 11. What piece of glassware would you use to measure a precise volume of liquid? 12. If you have the following measurements: 12.62 mL; 12.60 mL; 12.71 mL; 12.57 mL d. average: \_\_\_\_ e. relative percent deviation for each measurement: **References** **Equations**: \ [*c* = *λν*]{.math.display}\ \ [*E* = *hν*]{.math.display}\ \ [\$\$E = \\frac{\\text{hc}}{\\lambda}\$\$]{.math.display}\ \ [\$\$\\frac{1}{\\text{λ\\ }} = R\_{H}\\left\\lbrack \\frac{1}{n\_{\\text{final}}\^{2}} - \\ \\frac{1}{n\_{\\text{initial}}\^{2}} \\right\\rbrack\$\$]{.math.display}\ **Constants**: \ [\$\$speed\\ of\\ light\\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ \\ c = 3.00\\ x{\\ 10}\^{8}\\ \\frac{m}{s}\$\$]{.math.display}\ \ [\$\$\\text{Planc}k\^{\'}s\\ constant\\ \\ \\ \\ \\ \\ \\ \\ \\ h = 6.626\\ x\\ 10\^{- 34}\\text{\\ \\ }\\frac{m}{s}\$\$]{.math.display}\ \ [Rydberg constant *R*~*H*~ = 1.0974 *x* 10^7^ *m*^ − 1^]{.math.display}\ \ [\$\$\\text{Avogadr}o\^{\'}\\text{s\\ Number\\ \\ \\ \\ }N\_{A} = 6.022\\ x\\ 10\^{23}\\text{\\ \\ }\\frac{\\text{particles}}{\\text{mol}}\$\$]{.math.display}\