• Part A MISSED THIS? Read Section 7.3 (Pages 267- 272) : Watch WE 72. An unknown mass of each substance, initially at 21.0 °C, absorbs 1980 J of heat. The final temperature is recorded. Find the mass of each substance. a. Pyrex glass (Ty = 55.7 C) Express your answer using two significant figures. Submit Request Answer • Part B sand (Ty = 623 °C) Express your answer using two significant figures. Submit Request Answer • Part C ethanol (Ty - 44.0 °C) Express your answer using two significant figures. Submit Reguest Answer

Calculate the amount of heat needed to boil 34.0 g of water (H₂O), beginning from a temperature of 51.4 °C. Round your answer to 3 significant digits. Also, be sure your answer contains a unit symbol. x10 X 1/5 Ś ? 000 Ar

Suppose you went camping and you wanted to cook spaghetti, your camping cylinder weighed 548g total before you started heating the spaghetti. After you finished cooking, the cylinder weighed 486g. How much heat was produced to cook your spaghetti? Make sure to show all work with the correct sign. I need help solving this problem.

Select silver from the list of metals and record its mass, mmetal- mmetal = 21.0 Next, heat up the piece of silver and record the metal's highest temperature, Tmetal - Tmetal = 65.53 °C Next, record the mass of water (mwater) in the coffee cup. mater 64.0 Record the initial temperature of the water, Twaterl , in the coffee cup. Record the initial temperature of the water, Twaterl , in the coffee cup. Tunerl = 25.0 °C Place the hot piece of silver into the cool water and record the final temperature of the water, Twater2 Tuter? = 25.78 °C

Aluminum has a specific heat of 0.902 J/g⋅°C. How many joules of heat are required to change the temperature of 8.50 grams of aluminum from 25.0°C to 93.4°C?  a) 7.67 J b) 71.7 J c) 192 J d) 483 J e) 524 J

A 65.0-g piece of copper metal at 57.0 Celsius is placed in 50.0 g of water at 25.0 Celsius. The specific heat of water is 4.184 J/g Celsius. Part A. If the final temperature of the water and metal is 28.4 Celsius, what is the specific heat (J/g Celsius) of copper

Label the following as endothermic or exothermic.  The temperature of a substance decreases from 90 oC to 72 oC.   A pot of water absorbs heat and boils into steam.  Water vapor condensates on the window. . H2O (l) ? H2O (s)

One beaker contains 156 g of water at 20. °C, and a second beaker contains 76.8 g of water at 95 °C. The water in the two beakers is mixed. What is the final water temperature? Final water temperature = °C

890J of heat are applied to a piece of aluminum, causing a 4.6°C increase in its temperature. The specific heat of aluminum is 0.902 J/g°C. What is the mass of aluminum? 175g 214g 0.00220g 3,693g Prise Irert Backspace Num Lock 4 15 9. 01 131 T Y U PI 7. Home 11 Enter Shift 4 PyUp Alt Ctrl Home PoDn IT

A 5.40-g sample of octane is burned in a bomb calorimeter containing 6.17 x 102 g H,O. Given that 1.90 x 10 cal of energy is released if the water temperature increases 3.08°C. Calculate the energy released in J. Enter your answer in scientific notation. Be sure to answer all parts. × 10 (select)