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Leutium-176 has a half-life of 3.85 mc012-1.jpg 1010 years. After 1.155 mc012-2.jpg 1011 years, how much leutium-176 will remain from an original 16.8-g sample?
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Identify the acid-conjugate base pair in this balanced equation: H2SO4 + 2NaOH → 2H2O + Na2SO4
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Feldspar has a Mohs hardness of 6. Feldspar _____. is harder than a diamond can't be scratched by a diamond can't be scratched by talc is softer than a pencil lead
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How would a solution that is labeled “5.0 molar” be similar to one labeled “5.0 molal”?
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what Sd can friction do to moving objects?
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Oxygen decays to form nitrogen. 15 8 O → 15 7 N + 0 1 e This type of nuclear decay is called
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n what type of reaction or process does heat flow into the system? combustion exothermic condensation endothermic
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A cube of iron (Cp = 0.450 J/g•°C) with a mass of 55.8 g is heated from 25.0°C to 49.0°C. How much heat is required for this process? Round your answer to three significant figures. J
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A gas occupies 200 mL at -73°C. To have the same gas occupy 300 mL: Should the temperature be increased or decreased? What is the new temperature in Kelvins?
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A 1.00 g sample of naphthalene (C10H8) contains 0.562 g of hydrogen. What is the mass percent of carbon in the compound? A. 10.079% B. 12.01% C. 43.8% D. 50.02% E. 56.2%
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The sun is located at 1 astronomical unit from Earth. How far is the next closest star to Earth?
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What color is lead. ?
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