Answers created by Rita
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What type of radioactive decay produces no change in mass number?
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How many grams are there in 7.50 x 10^237.50x1023 molecules of H_2SO_4H2SO4?
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Given that 0.28 g of dry gas occupies a volume of 354 mL at a temperature of 20°C and a pressure of 686 mmHg, how do you calculate the molecular weight of the gas?
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How to find the nucleon number with the information of the number of protons and neutrons?
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How do metallic bonds differ from covalent bonds?
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A 25-g piece of an unknown metal is heated to 100°c and then placed into a calorimeter containing 45g of water at a temperature of 23.0°c.The final temperature of both is 27.0°c. What is the specific heat of the unknown metal?
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At a constant temperature, a gas that exerted a pressure of 2.43 atm and that occupied 1.87 L is compressed until its pressure is 6.35 atm. What is the final volume?
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If the spin of one electron in an orbital is spin-up, what is the spin of the other electron in that orbital?
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What is the distance between (3,5)(3,5) and (6,2)(6,2)?
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A balloon is filled with 4.57 liters of air at room temperature(23.3 deg C). Liquid nitrogen is poured over the balloon until the gas is at a temperature of -197 degrees C. What volume with the gas have inside the balloon?
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A block of lead, with dimensions 2.0 dm x 8.0 cm x 35 mm, has a mass of 6.356 kg. How do you calculate the density of lead in g/(cm^3)gcm3?
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How many atoms are in 75 grams of calcium?
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What are the atomic number and atomic mass of the element formed when 218Po emits a beta particle?
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The specific heat capacity of an unknown liquid is 0.320.32 "J"/("kgK")JkgK. The density of the liquid is 0.03210.0321 "g/mL"g/mL. If a chemist applies 243243 "J"J of heat to 300300 "mL"mL of this liquid starting at 27.1 ^@27.1∘ CC, what is the final temperature?
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How do you use the distributive property to simplify 7(z - 4)7(z−4)?