How many Pb and Kr atoms are there in Pb9(Al5Kr7)4?
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What is the mass of 2.00 l of an intravenous glucose solution with a density of 1.15 g/ml?
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Imagine that you push on a large rock. at what point does your effort change the rock’s mechanical energy?
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Ascientist measures the speed of sound in a monatomic gas to be 449 m/s at 20∘c. what is the molar mass of this gas?
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Which statement explains why the bonds between non metals tend to be covalent? the bonds are found to be nondirectional they have large differences in electronegativity they have small differences in electronegativity they have ions that produce an electrostatic pull
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