Physical Science Laboratory Template (5) (1)

Safari File Edit View History Bookmarks Window Help Mon Sep 28 3:13 PM session.masteringchemistry.com Test Chapter 5 Hide Timer Item 16 16 of 20 v Complete I Review I Constants I Periodic Table A high-protein diet contains 63.6 g of carbohydrate, 5.9 g of fat, and 140 g of protein. TABLE 3.7 Typical Energy Values for the Three Food Турes Part A How much energy, in kilocalories, does this diet provide? (Round off the kilocalories to the tens place.) Food Type kcal/g kJ/g Express your answer to two significant figures and include the appropriate units. Carbohydrate 4 17 Fat 9. 38 Protein 4 17 Submit Previous Answers Completed; correct answer withheld by instructor Part B How much energy, in kilojoules, does this diet provide? (Round off the kilojoules to the tens place.) Express your answer to three significant figures and include the appropriate units. Submit Previous Answers Completed; correct answer withheld by instructor Provide Feedback Next > 00

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Figure 40 Petroleum 30 Natural gas Coal Nuclear electric power Hydroelectric power Wood 1800 1825 1850 1875 1900 1925 1950 1975 2000 Year Since 1800, the main sources of energy have been fossil fuels, with other sources contributing less than 20% of the total. Chapter 3, Question 49 Using information in the figure above, calculate the total world energy consumption in 1975. i x 10 i kJ eTextbook and Media Save for Later Attempts: 0 of 3 used Submit Answer Energy consuption by source, 1018 kJ/yr

please answer the question based on the table, thanks

For Lab 4 Energy of food content Experiment, use the following data. The specific heat (Water) is 1.00 cal/g°C. Make sure to fill up all of the Table 1, 2, 3, 4 such as your post-lab report.  a) What is Average energy content of sample (Cal/g)? b) What is Theoretical energy content of sample (Cal/g)? c) What is the Percent Error (%) of Experimental energy content of sample?

Review the table of energy use versus land resources below. The perpetual column refers to the same land used repeatedly for the same energy resource. One-time use means new land would be needed to provide the resource again. Reclamation refers to the restorative processes necessary to return the land to what it once was Energy Use Vs. Land Resources Acres of land Land use Electricity over 75 years (GWh) Acres of land (perpetual) per year Reclamation options (One time use) Nuclear (mining) 16.66 16.66 Coal (mining) 11.11 11.11 Biomass 0.40 18 Solar 25.00 8.33 Wind 2.90 26 Hydropower 2.50 30 According to the data, which of the following energy sources uses land least efficiently compared to its energy output? O Solar energy O Wind energy O Hydropower O Coal energy Very high cost (radioactive) Costly (<1% reclaimed) Replant trees/crops Remove or replace panels and dual use of land Remove or replace turbines and dual use of land Drain dam + restoration

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Figure 40 Petroleum 30 Natural gas 20 Coal Nuclear electric 10 power Hydroelectric power Wood 1800 1825 1850 1875 1900 1925 1950 1975 2000 Year Since 1800, the main sources of energy have been fossil fuels, with other sources contributing less than 20% of the total. Chapter 3, Question 49 Your answer is incorrect. Using information in the figure above, calculate the total world energy consumption in 1975. i ! x 10 ! kJ Energy consuption by source, 108 kJ/yr

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command option General Chemistry II Laboratory Manual, 2019 Revsion 39 Questions: 1) When you set up the temperature probe using Capstone, you did not calibrate it to read the correct temperature. It's possible that the probe reads temperatures that are Thi consistently off by 1 or 2°C. Why won't this affect your results for this experiment? Explain your answer.

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Select the correct answer. Katrina inserts a key into her car’s ignition. She turns the key, putting her car into ignition mode. In this mode, some energy is used to increase the temperature of the car’s fuel. This energy allows the fuel to combust and the car to move. What’s this energy called?   A.  absorbed energy B.  activation energy C.  chemical energy D.  released energy E.  solar energy

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[please answer with correct answer] Temperature is a measure of ____

Part A How many kWh of energy does a 600-W toaster use in the morning if it is in operation for a total of 4.0 min ? Express your answer to two significant figures and include the appropriate units. Energy = kWh Submit Request Answer Part B At a cost of 9.0 cents/kWh, estimate how much this would add to your monthly electric energy bill if you made toast four mornings per week (16 times per month) Express your answer using two significant figures. VO AE Cost = cents/month Submit Request Answer