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. 30.0 g H2O at an unknown temperature is mixed with 27.0 g of water at 15.8oC in a coffee-cup calorimeter. If
the final temperature of the mixture is 29.1oC, what is the initial temperature of the water?
Compare the amount of heat given off by 1.40 mole of liquid water when it cools from 100.0 oC to 30.0 oC to
that given off when 1.40 mol of steam cools from 200.0 oC to 110.0 oC ( Cp H2O (l) = 4.184 j/g-oC , Cp H2O (g)
= 1.87 J/j-oC) . Explain your comparison
. If 35.0 g H2O at 22.7°C is combined with 65.0 g H2O at 87.5°C, what is the final temperature of the
mixture? The specific heat capacity of water is 4.184 J/g⋅°C.
A coffee-cup calorimeter contains 50.0 g of water at 60.51°C. A 12.4 g piece of graphite at 24.21°C is
placed in the calorimeter. The final temperature of the water and the carbon is 59.02°C. Calculate
the specific heat of carbon. The specific heat of water is 4.18 J/g⋅°C.
Write in the form “if p then q”, then write the converse, inverse and contra positive of each of the following implications.
- It is necessary to do your homework to get the passing grade.
a. Converse (q →p) =
b. Contra positive (q→¬p )=
c. Inverse (p→¬q ) =
2. You can access the school Wifi only if you are enrolled.
a. Converse (q →p) =
b. Contra positive (q→¬p )=
c. Inverse (p→¬q ) =
3. Mark gets a high grade whenever he studies his lesson.
a. Converse (q →p) =
b. Contra positive (q→¬p )=
c. Inverse (p→¬q ) =
4. If you read your lessons everyday, you will pass all your course.
a. Converse (q →p) =
b. Contra positive (q→¬p )=
c. Inverse (p→¬q ) =
5. If it rains today, I will stay home and read my lessons.
d. Converse (q →p) =
e. Contra positive (q→¬p )=
f. Inverse (p→¬q ) =
how many different elements does A x B have if A has m elements and B has n elements?
If A = {5,6,7} and B = {2,3}, {(2,6),(2,5),(3,7)} ⊆ B×A.
Find A x B if A={0,1,3} and B={1,2,a,b}.
INTERVAL ESTIMATE
4. Suppose that the amount of time spend by working student weekly is normally distributed with the standard deviation of 25 minutes. A random sample of 125 observations is drawn and the sample mean is computed as 150 minutes. Determine the 95% confidence interval estimate of the population mean.
INTERVAL ESTIMATE
4. Suppose that the amount of time spend by working student weekly is normally distributed with the standard deviation of 25 minutes. A random sample of 125 observations is drawn and the sample mean is computed as 150 minutes. Determine the 95% confidence interval estimate of the population mean.
