April 1

Convert as asked and show work.

1. Convert 35 lb/in2 to kg/cm2.

2. Convert 150 km/hr to mile/hr.

April 3Convert as asked and show work.

1. Convert 77 g of NaBr to moles.

2. Convert 4.2 moles of ZnCl2 to grams.

April 7

Convert as asked and show work.

1. Convert 0.78 moles of CsBr to molecules.

2. Convert 5.4 x 1023 mc of CsBr to moles.

April 9

Convert as asked and show work.

1. Convert 250 g of LiF to molecules.

2. Convert 7.3 x 1022 mc of LiF to grams.

April 15

Convert as asked and show work.

The distance between Wichita and Washington DC is ______ miles. A single paper clip is 2 cm long. How many trips between Wichita and DC could be made with a mole of paper clips?

April 17 : the data

Plot the mass of citric acid on the x-axis and vol of CO2 on the y-axis.

Find the slope of your line.

Mass citric acid, g

Vol CO2, cm3

0.1 5

0.2 10.2

0.3 14.7

0.4 19.3

April 17: the graph

April 21Tensile strength with and without pre-stretching of various types of

rubberbands

Average Tensile strength at 25 oC, N/mm2

Rubber-band type

no pre-stretching

pre-stretching

A 52 52

B 100 82

C 87 86

D 4 4

Four types of rubber bands were cut to form single 10 cm long strands with cross-sectional areas of 3 mm2. Each rubber band was stretched until broken. The force needed to break the band was recorded. Twenty-five rubber bands of each type were tested, and the data were averaged, as shown in Tensile strength data table.

April 21 Graph the rubberband data with an appropriate title and label on axes. You will need a key to do this correctly.

April 23

Average Tensile strength vs temperature and type of rubberband

Tensile strength, N/mm2

Rubber-band type 10 oC 50 oC

A 68 39

B 110 92

C 87 81

D 4 2

Graph the rubberband data with an appropriate title and label on axes. You will need a key to do this correctly.

April 23

Graph the rubberband data with the appropriate title and axes labels. A key will be necessary.

April 27Type of solid

Melting behavior

Solubility in water

Electrical conductivity

Impact behavior

Ionic Most melt between 600 oC and 1500 oC

Some are soluble.

Conductive when melted

Shatters

Molecular

Most melt between -150 oC and 300 oC

Most are not soluble.

Non-conductive

Shatters

Metallic Most melt between -39 oC and 3400 oC

Most are not soluble.

Conduct as liquids or solids

Malleable

Covalent network

Most melt between 1000 oC and 3000 oC

Most are not soluble.

Noncon-ductive except for metalloids and graphite

Shatters

April 271. A substance decomposes at 308 – 310

oC, is insoluble, nonconductive, and shatters. Based on this information, how should this solid be classified?

2. Another substance is nonconductive and cannot be melted in a burner flame of 800 oC. Based on this information, how should this solid be classified?

April 29

Temperature and Time vs Number of Corn Seeds Sprouting

Temp, oC

Total Corn Seeds Sprouted

7 days 14 days 21 days

5 0 0 0

20 25 37 44

35 50 70 80

50 2 3 3

April 29 questions

1. Based on the data table, what are the independent variables?

2. Based on the data table, what is the dependent variable?

3. What are three things that would need to be constant for a fair test?

4. What temperature is best for corn seeds to sprout?