slide1 n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Significant Digits and Metric Conversions! PowerPoint Presentation
Download Presentation
Significant Digits and Metric Conversions!

Loading in 2 Seconds...

play fullscreen
1 / 52

Significant Digits and Metric Conversions! - PowerPoint PPT Presentation


  • 109 Views
  • Uploaded on

Chemistry Unit 4 Review Part 1. Significant Digits and Metric Conversions!. Question 1 - 10. How many significant Digits are in this number: 1422. Answer 1 – 10. 4! All numbers present are between 1 and 9. Question 1 - 20. How many significant digits are in the following number? 200.

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Significant Digits and Metric Conversions!' - maile-payne


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
slide1

Chemistry

Unit 4 Review

Part 1

Significant Digits and Metric Conversions!

question 1 10
Question 1 - 10
  • How many significant Digits are in this number:

1422

answer 1 10
Answer 1 – 10
  • 4!
  • All numbers present are between 1 and 9.
question 1 20
Question 1 - 20
  • How many significant digits are in the following number?

200

answer 1 20
Answer 1 – 20
  • There is only 1!
  • The zeros don’t count because the number doesn’t have a decimal place in it!
question 1 30
Question 1 - 30
  • How many significant ZEROs are in the following number?

0.0030050

answer 1 30
Answer 1 – 30
  • 3!
  • The captures zeros and the trailing zero are the only ones that are significant!
question 1 40
Question 1 - 40
  • What is the length of the following green bar?
answer 1 40
Answer 1 – 40
  • 1.25!
  • The 1 and the 2 are in concrete, the 5 can be a different number that is reasonable.
question 1 50
Question 1 - 50
  • How many zeros in the following number are NOT significant?

.0005050090

answer 1 50
Answer 1 – 50
  • 3!
  • Only the zeros in the beginning of the number do not count!
question 2 10
Question 2 - 10
  • Convert the following:

254.3 grams to Kilograms

answer 2 10
Answer 2 – 10
  • .2543 Kg
  • The number will get smaller because the unit gets bigger!
question 2 20
Question 2 - 20
  • How many milliliters are in the following number?

0.0367 Liters

answer 2 20
Answer 2 – 20
  • 36.7 mL
  • The number gets bigger because the unit gets smaller!
question 2 30
Question 2 - 30
  • Which weighs more?

4.25 grams of Au or

425 mg of Au

answer 2 30
Answer 2 – 30
  • 4.25 grams does!
  • Convert milligrams to grams and you get .425 mg! That is less than 4.25 grams!
question 2 40
Question 2 - 40
  • What is the metric prefix that correspond to the following quantity?

10-2

question 2 50
Question 2 - 50
  • How many mL are in the following number?

87 DL

answer 2 50
Answer 2 – 50
  • There are 870,000 mL!
  • KHD*dcm
question 3 10
Question 3 - 10
  • What is the answer to the following addition problem?

212.2 + 26.7 + 402.09

=

answer 3 10
Answer 3 – 10
  • Addition, so look for least # of decimal places!
  • 641.0
question 3 20
Question 3 - 20
  • What is the answer to the following addition problem?

2.01x102 + 3.014x103

answer 3 20
Answer 3 – 20
  • 3215
  • You have to take the numbers out of scientific notation to look at decimal places!
question 3 30
Question 3 - 30
  • What is the answer to the following problem?

52.331 + 26.01 – 0.9981

answer 3 30
Answer 3 – 30
  • 77.34
  • Watch number of decimal places here! Add and subtract carry least number of decimal places to the answer.
question 3 40
Question 3 - 40
  • How many digits after the decimal point should be reported when the following calculation is performed?

199.0354 + 43.09 + 121.2

answer 3 40
Answer 3 – 40
  • There should only be 1 decimal place in this answer!
question 3 50
Question 3 - 50
  • How many digits after the decimal place should be reported when the following calculation is performed?

10,434 – 9.3344

answer 3 50
Answer 3 – 50
  • There will not be any decimal places in this number! 
question 4 10
Question 4 - 10
  • What is the answer to the following division problem?

12.011 / 6.022x1023

answer 4 10
Answer 4 – 10
  • 1.995x10-23
  • We need to look at number of significant digits in the numbers of the problem—least number determines answers sig figs!
question 4 20
Question 4 - 20
  • What is the answer to the following problem?

(4.031)(0.082068)(373.1)/.995

answer 4 20
Answer 4 – 20
  • 124
  • Remember least # of sig figs will be reported in the answer!
question 4 30
Question 4 - 30
  • The answer to the following question should be written with how many significant digits?

2.3733x102/

343

question 4 40
Question 4 - 40
  • When the following calculation is performed, the answer should be reported with how many significant digits?

.0043*.0821*298

answer 4 40
Answer 4 – 40
  • 2!
  • Remember least goes! 
question 4 50
Question 4 - 50
  • What is the answer to the following problem?

(6.1982x10-4)2

answer 4 50
Answer 4 – 50
  • 3.8418x10-7
  • Or 3.8000x10 -7
question 5 10
Question 5 - 10
  • What is the answer to the following problem?

(2.0944+.0003233*12.22)/7.001

answer 5 10
Answer 5 – 10
  • .2997
  • Remember your order of operations!
  • Please Excuse My Dear Aunt Sally!
question 5 20
Question 5 - 20
  • What is the answer to the following problem?

[(1.42x102)+(1.021x103)]/3.1x10-1

question 5 30
Question 5 - 30
  • Consider the following numbers 23.68 and 4.12.
  • The sum of these numbers has how any significant digits?
  • The product of these numbers has how many significant digits?
answer 5 30
Answer 5 – 30
  • Sum has 4
  • Product has 3
question 5 40
Question 5 - 40
  • You pour the water from these beakers into a separate container. What is the volume with the correct number of significant digits.
answer 5 40
Answer 5 – 40
  • Your answer should range from 81 to 82 mL without any decimals!
question 5 50
Question 5 - 50
  • Report the volume of the water in each beaker with the proper # of significant digits.
answer 5 50
Answer 5 – 50
  • I has 26.4(ish) mL
  • II has 28(ish) mL
  • III has 26.42(ish) mL
  • The –ish comes from your interpretation. Remember the first digits are known and the last digit is an educated guess (is it uncertain).