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An element has an atomic number of 83. the number of protons and electrons in a neutral atom of the element are
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7. what temperature is need to just dissolve 50 g of nh4cl in 75 g of water? '
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Which of the following shapes would represent a molecule with two bonded atoms and 3 lone pairs on only one of them , trigonal planar , bent , trigonal pyramidal , linear
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100 grams of molten lead (600Ā°c) is used to make musket balls. if the lead shot is allowed to cool to room temperature (21Ā°c), what is the change in entropy (in j/k) of the lead? (for the specific heat of molten and solid lead use 1.29 j/gā
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What is a difference between a mixture of elements and a mixture of compounds
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An element has an atomic number of 83. the number of protons and electrons in a neutral atom of the...
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