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BartSMP [9]
3 years ago
12

How many protons are found in an atom of platinum (pt)?

Chemistry
1 answer:
Natasha_Volkova [10]3 years ago
5 0
78 protons are found in platinum(pt).
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An iron sulfide compound is analyzed, and found to contain 11.26 g iron and 9.70 g sulfur. Determine the molar ratio of sulfur t
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First we convert <u>the given masses of each element into moles</u>, using <em>their respective molar masses</em>:

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Meaning that for each 1 Fe mol, there's 1.5 S moles. We can write that as Fe₁S₁.₅

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Suppose you were calibrating a 50.0 ml volumetric flask using distilled water. the flask temperature was at 20°c, and you assume
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Density is sensitive to temperature for gases and liquids, although not much for liquids. We use the data in the picture. Using linear interpolation, we determine the densities at 14°C and 20°C.

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@14°C:
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Mass @ 14°C = 50 mL *  0.99913 g/mL = 49.9565 g
Difference of Masses = |49.9115 g - 49.9565 g| = 0.045 g

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3 years ago
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