Enter your answer in the provided box. An iron bar has a mass of 543 g. After the bar had been standing in air for a month, exactly one-eighth of the iron turned to rust (Fe2O3). Calculate the final mass of the iron bar and the rust. |
Enter your answer in the provided box. An iron bar has a mass of 543 g....
Enter your answer in the provided box. An iron bar of mass 719 g cools from 92.0°C to 4.0°C. Calculate the metal's heat change (in kilojoules) kJ
Enter your answer in the provided box. What is the mass number of an iron atom that has 29 neutrons?
3 attempts left Check my work Enter your answer in the provided box. What will be the final temperature of a 543-g sample of water, initially at 15.0°C, after 59.5 kJ have been added to it?
Enter your answer in the provided box. A 456 g sample of water has an initial temperature of 18.0°C. After 50.9 kJ of energy is added to the water sample, what will be its final temperature? oc
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3 attempts left Check my work Enter your answer in the provided box. points A sample of 0.5760 g of an unknown compound containing barium ions (Ba) is dissolved in water and treated with an excess of Na,C0y. If the mass of the BaCO, precipitate formed is 0.5343 . what is the percent by mass of Ba in the original unknown compound? ebook Print References 3 attempts left Check my work Enter your answer in the...
Enter your answer in the provided box. One piece of copper jewelry at 125 degree C has exactly twice the mass of another piece, which is at 40 degree C. Both pieces are placed inside a calorimeter whose heat capacity is negligible. What is the final temperature inside the calorimeter (c of copper = 0.387 J/g middot K)? degree C
Enter your answer in the provided box. What mass of KI is dissolved in 600.0 g of a solution that is 35.0% KI by mass? g KI KPrev 14 of 32l Next
Enter your answer in the provided box. What will be the final temperature of a 402 g sample of water, initially at 12.0°C, after 51.8 kJ have been added to it? The specific heat capacity of water is 4.184 g. °C
Enter your answer in the provided box. Calculate the composition of the following solution in mass/volume %: 40.0 g benzene per 1.00 x 102 mL % benzene Calculate the volume, in L, of water that must be added to dilute 22.9 mL of 10.5 M HCl to 0.0900 M HCl. Enter your answer in the provided box. L water
Enter your answer in the provided box. A 54.77−g sample of water at 75.8°C is added to a sample of water at 25.4°C in a constant-pressure calorimeter. If the final temperature of the combined water is 41.6°C and the heat capacity of the calorimeter is 26.3 J/°C, calculate the mass of the water originally in the calorimeter. m = ____ g