Key Question #1

# Key Question #1 - would travel faster than the heavy...

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

Lesson 1 Key Questions 1) a) i) 3.17 iv) 1.35 ii) 2.47 x 10 -3 v) 7.00 iii) 102 b) The \$2000 electric balance is more precise because it shows 3 digits after the decimal point instead of 2. A balance that would show only 1 or 2 digits after the decimal point would suffice because it would parallel the same precisions of the other values in the experiment (8.6 o o C). 2) a) The chlorine is much heavier (35.5) compared to 1 that the hydrogen weighs. Chlorine is 35.5 times heavier than hydrogen. b) The temperature of each gas would be the same since both gases are in the same cylinder. c) The average kinetic energy relates to the temperature. This means it is the same for both gases. d) Since the hydrogen is a smaller and lighter molecule it

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

View Full Document
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: would travel faster than the heavy chlorine molecule. 3) a) Ca=40.1g/mol (52.5g) \ (40.1 g/mol) = 1.259 mol (1.259 mol) x (6.02 x 10 23 mol) = 7.579 x 10 23 atoms of Ca There are 7.9 x 10 23 atoms of Ca in 52.5g of Ca metal b) 1.5mol x 6.02 x 10 23 = 9.03 x 10 23 There are 9.03 x 10 23 atoms of C in 1.5 mol c) 1.5mol x 6.02 x 10 23 = 9.03 x 10 23 There are 9.03 x 10 23 atoms of CO 2 in 1.5 mol 4) a) [ (P 1 V 1 ) / T 1 ] = [ (P 2 V 2 ) / T 2 ] V 1 = ? P 1 = 0.75 atm. T 1 = 243 K V 2 = 255 L P 2 = 1.25 atm. T 2 = 313 K V= [ (255L x 1.25atm.) / 313K ] x 243K / 0.75atm = 329.952 L The volume of gas would be 329.952 L at -30 o C and 0.75 atm....
View Full Document

## This note was uploaded on 12/13/2009 for the course ENGG ENGL 1199 taught by Professor Bruseski during the Spring '09 term at University of the Bío-Bío.

### Page1 / 3

Key Question #1 - would travel faster than the heavy...

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

View Full Document
Ask a homework question - tutors are online