Using the method from this week's lab, determine (c) the density and (d) the proportion of error in the density calculation. This is not plagiarism A student measures the diameter of a small cylindrical object and gets the following readings: 4.32, 4.35, 4.31, 4.36, 4.37, 4.34 cm (a) What is the average diameter from these readings? (b) What is the standard deviation of these measurements? The student also measured the length of the object to be (0.126 ± 0.005) m and the mass to be object to be (1.66 ± 0.05) kg. Which of the following is true for the Student Version above? Also, games are seen as a break from a lesson in which students reinforce their learning during the break. Games can make teaching and learning more fun, and learners are able to work at their own pace. Learning, Media and Technology, 31(4), 343-358.Īccording to Freitas (2006), games can support the learning styles of visual and kineasthetics learners. Using games and simulations for supporting learning. While most saw a value in using games, as: 'good for visual/kinesthetic learners' 'makes teaching and learning more fun, learners are able to work at their own pace' 'breaks up the lesson, different learner styles' 'give my students variety and some fun whilst reinforcing their learning'.ĭe Freitas, S. We divide by the smallest number of moles Which of the following questions about the compound can be answered using the results of the analysis?ī) What is the molar mass of the compound?Ĭ) What is the chemical stability of the compound?ĭ) What is the empirical formula of the compound? The results showed that the sample contained 36.0g of C and 6.0g of H. We can solve the question 'What is the empirical formula of the compound?' The answer is CH2Ī 42.0g sample of compound containing only C and H was analyzed. The molar mass of CO2 is 12 + 2(16) = 44g/mol
Since we have the number of moles of CO2 now, we need to know the molar mass to enable us get the mass Since 6 moles of CO2 were produced from one mole of glucose, the number of moles of glucose produced is thus 6 * 0.25 = 1.5 moles
Now we proceed to get the number of moles of CO2 produced. The number of moles is thus 45/180 = 0.25 mole This can be obtained by dividing the mass by the molar mass. Firstly, we get the number of moles of glucose reacted. Now, we need to get what happened actually.
Here we have glucose reacting with oxygen to give carbon iv oxide and water plus energy.įrom the chemical reaction, we can see that 1 mole of glucose yielded 6 moles of carbon iv oxide. The first step to solving this problem is by writing a balanced chemical reaction. 44 g of CO2 - 12 g of carbonġ8 g of water - 1 g of hydrogen
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