110sample_exam_Sample-Test-chem110Aau04

110sample_exam_Sample-Test-chem110Aau04 - (v) Electrolysis...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
C H E M 1 1 0 N a m e : A u t u m n 2 0 0 2 S e c t i o n : 1 st MIDTERM TEST FEEL FREE TO USE TABLES ON THE LAST PAGE! 1. Express the following numbers in scientific notation: (i) 90900 (ii) 990 (iii) 0.0000099 2. Express the following scientific notation numbers in “ordinary” decimal numbers: : (i) 5.9 x 10 -2 (ii) 590 x 10 3 (iii) 590 x 10 -4
Background image of page 1

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

View Full DocumentRight Arrow Icon
3. (i) Express 8,000 milliliter (ml) in liters (L) (ii) Express 20 kilometers (km) in meters (m). (iii) Express 100 kilometers (km) in centimeters (cm) (iv) Express 200,000 milligrams (mg) in kilograms (kg)
Background image of page 2
4. a. Convert 19,000 feet (ft) to yards (yd) b. Convert 19,000 feet (ft) to miles (ml). 5. Convert 95 o F to o C. 6. A metal spoon weighs 42 g and occupies 4 ml of volume. (i) What is its density? (ii) What metal is it (see standard numbers on last page)?
Background image of page 3

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

View Full DocumentRight Arrow Icon
7. After each statement, please state whether it is TRUE or FALSE: (i) A solid has no fixed shape (ii) A liquid has no fixed volume (iii) Solids, liquids, and gasses have mass and occupy space (iv) Conversion of ice to steam involves chemical changes
Background image of page 4
Background image of page 5
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: (v) Electrolysis of water to oxygen and hydrogen involves chemical changes (vi) A pure substance is always a pure element (vii) A homogeneous mixture has two or more pure substances (viii) Distillation is a method for purifying volatile liquid from a non-volatile solid (ix) Filteration is a way of separating dissolved materials in a homogeneous liquid. (x) Specific heat is the amount of energy needed to change the temprature of a substance by one Celsius degree. 8. How much energy does it take to heat 120 g of water from 18 o C to 38 o C? 9. How much energy does it take to heat 120 g of iron from 18 o C to 38 o C? ----------------------------------------------------------------------------------------------------------- Some useful conversion numbers: 1 mi = 1760 yd 1 kg = 2.205 lb 1 yd = 3 ft 1 L = 1.06 qt Specific Heat Capacities Density Liquid water 4.184 1.0 Aluminum 0.89 2.7 Iron 0.45 7.87 Silver 0.24 10.5 Gold 0.13 19.32...
View Full Document

Page1 / 5

110sample_exam_Sample-Test-chem110Aau04 - (v) Electrolysis...

This preview shows document pages 1 - 5. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online