Chemistry chapter 4 problem solving in chemistry
This presentation is the property of its rightful owner.
Sponsored Links
1 / 13

CHEMISTRY CHAPTER 4 PROBLEM SOLVING IN CHEMISTRY PowerPoint PPT Presentation


  • 91 Views
  • Uploaded on
  • Presentation posted in: General

CHEMISTRY CHAPTER 4 PROBLEM SOLVING IN CHEMISTRY. Steps for solving word problems:. 1. Find unknown 2. Find knowns 3. Plan solution 4. Calculate 5. Check. A conversion factor is a ratio with a value of one. Ex. 1 ft = 12 inches 1.00g water = 1 mL water 100 cm = 1m.

Download Presentation

CHEMISTRY CHAPTER 4 PROBLEM SOLVING IN CHEMISTRY

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


Chemistry chapter 4 problem solving in chemistry

CHEMISTRYCHAPTER 4PROBLEM SOLVING IN CHEMISTRY


Steps for solving word problems

Steps for solving word problems:

1. Find unknown

2. Find knowns

3. Plan solution

4. Calculate

5. Check


Chemistry chapter 4 problem solving in chemistry

A conversion factor is a ratio with a value of one.Ex. 1 ft = 12 inches 1.00g water = 1 mL water 100 cm = 1m


Dimensional analysis is also called the factor label method of problem solving

Dimensional Analysis is also called the “factor label method” of problem solving.


Ex 52 5 m mm

Ex. 52.5 m = ____ mm

52.5 m x 1000 mm = 5.25 x 104 mm

1m

or 52.5m 1000mm = 5.25 x 104 mm

1m


Ex 73 2 km cm

Ex. 73.2 km = ____ cm

73.2 km 1000m

1 km

73.2 km 1000m 100 cm

1 km 1m

= 7.32 x 106 cm


How many seconds are there in 2 5 years

How many seconds are there in 2.5 years?

2.5 years 365 days

1 year

2.5 years 365 days 24 hours

1 year 1 day

2.5 years 365 days 24 hours 60 min

1 year 1 day 1 hour

2.5 years 365 days 24 hours 60 min 60 s

1 year 1 day 1 hour 1 min

= 7.9 x 107 s


A clock gains 0 25 seconds per minute how many seconds will it gain in exactly 180 days

A clock gains 0.25 seconds per minute. How many seconds will it gain in exactly 180 days?

180 days 24 hr

1 day

180 days 24 hr 60 min

1 day 1 hr

180 days 24 hr 60 min 0.25s gained

1 day 1 hr 1 min

=6.48 x 104 s gained

= 6.5 x 104 s gained


Chemistry chapter 4 problem solving in chemistry

A fictitious unit of length called the “zither” is defined by the relationship 7.50 cm = 1.00 zither. How many zithers are in a 100.0 meter distance?

100.0m 100cm

1 m

100.0m 100cm 1.00 zither

1 m 7.50 cm

= 1333 zithers

= 1330 zithers


What is the mass of a 35 0 ml sample of concentrated sulfuric acid density 1 84g ml

What is the mass of a 35.0 mL sample of concentrated sulfuric acid (density 1.84g/mL)?

35.0 mL 1.84g

1 mL

= 64.4 g


Nolan ryan threw a fastball 100 8 mi h calculate this velocity in m s 1 mi 1 6093 km

Nolan Ryan threw a fastball 100.8 mi/h. Calculate this velocity in m/s. 1 mi = 1.6093 km.

100.8 mi

1 h

100.8 mi 1.6093 km

1 h 1 mi.

100.8 mi 1.6093 km 1000 m

1 h 1 mi. 1 km

100.8 mi 1.6093 km 1000 m 1hr

1 h 1 mi. 1 km 60 min

100.8 mi 1.6093 km 1000 m 1hr 1 min

1 h 1 mi. 1 km 60 min 60 s

45.06 m/s


The density of copper is 8 96g cm 3 at 25 o c determine its density in kg m 3

The density of copper is 8.96g/cm3 at 25oC. Determine its density in kg/m3.

8.96g

1 cm3

8.96g 1kg

1 cm3 1000g

8.96g 1kg (100)3cm3

1 cm3 1000g 1m3

=8960 kg/m3 or 8.96 x 103 kg/m3


Chemistry chapter 4 problem solving in chemistry

Copper makes up 1.1 x 10-4 percent by mass of a normal healthy human. How many grams of copper would be found in the body of a person weighing 150 lb? (1.0 kg = 2.2 lb)

150 lb man 1.0kg man

2.2 lb man

150 lb man 1.0kg man 1000g man

2.2 lb man 1 kg man

150 lb man 1.0kg man 1000g man 1.1 x 10-4g Cu

2.2 lb man 1 kg man 100g man

= 7.5 x 10-2 g Cu or 0.075g Cu


  • Login