If an atom has nine protons, eight neutrons and ten electrons what is its charge? A. -1 B. 0 C. +1 D. More information is needed to answer this.
A. -1
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Which of the following is always true when a substance undergoes a physical change? A. the composition changes B. a change in color occurs C. no new substance is formed D. its specific gravity remains the same
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Updated 6/22/2011 12:30:02 PM
When a substance undergoes physical change C.) No new substance is formed.
If piece of copper has a density of 13.29 g/cm³ and a volume of 25 cm, what is the mass of the liquid? A. 325 g B. 1.88 g C. 0.5316 g D. 332.25 g
Weegy: Assuming you meant 25 cm^3, the solution would be 8/25 and the result would be 0.32 gm/cm^3 or 320 kg/m^3 [ ] (More)
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Updated 6/22/2011 12:43:26 PM
If this copper is in liquid form (more than likely from being melted) and assuming that your volume is 25 cm^3 and not 25 cm (which would be 25 cm line), then all you need to do is multiply 13.29 g/cm^3 and 25 cm^3 to get a mass of D.) 332.25 grams.
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