What is the average atom weight of the element
A hypothetical element Z has two stable isotopes: Z-46 = 46.046 u 64.08% Z-51 = 50.826 u 35.92% What is the average atom weight of the element?
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A raft is made of 11 logs lashed together. Each is 35 cm in diameter and has a length of 5.6 m. How many people can the raft hold before they start getting their feet wet, assuming the average person has a mass of 70 kg? Do not neglect the weight
A 45.5 g sample of copper at 99.8 degrees celsius is dropped into a beaker containing 152 g of water at 18.5 degrees celsius. What is the final temperature when thermal equilibrium is reached?
Does doubling the volumes of acid and base in a neutralization reaction double the amount of heat released? And also does doubling the concentrations (but not the volumes) of acid.
You are hanging on to the edge of a merry-go-round, and must exert a force of 100 N to hang on. If the speed of the merry-go-round doubles, how much force will you need to exert to hang on?
If carbon dioxide gas is collected over water at 25 °C and 775 torr, what is the partial pressure of the CO2? The vapor pressure of water at 25 °C is 23.8 torr.
When sulfuric acid is a component of polluted air, it chemically attacks statues, memorials, and monuments made from limestone. Given that the most common mineral in limestone is calcium carbonate, describe how these limestone objects are corrode
A piston has an external pressure of 8.00. How much work has been done if the cylinder goes from a volume of 0.130 liters to 0.450 liters.
A gas cylinder containing 6.38 mol of neon has a pressure of 491 mmHg at 295 k. If 3.22 mol helium is added at constant temp and pressure, what will be the pressure in the cylinder?"
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