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finlep [7]
3 years ago
14

galium has a weighted average atomic mass of 69.7 and two naturally occurring isotopes: Gallium-69 and Gallium-71. Gallium-69 ha

s a relative abundance of 60.1% and a mass of 68.9. The relative abundance of gallium-71 is 39.9%. Based on the information, what is the mass of gallium-71?
Chemistry
1 answer:
dimulka [17.4K]3 years ago
6 0
Figure it out yet????
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Use the equation to determine what mass of FeS must react to form 326 g of FeCl2.
iogann1982 [59]

Answer:

We need 226 grams of FeS

Explanation:

Step 1: Data given

Mass of FeCl2 = 326 grams

Molar mass FeCl2 = 126.75 g/mol

Step 2: The balanced equation

FeS + 2 HCl → H2S + FeCl2

Step 3: Calculate moles FeCl2

Moles FeCl2 = 326 grams / 126.75 grams

Moles FeCl2 = 2.57 moles

Step 4: Calculate moles FeS needed

For 1 mol H2S and 1 mol FeCl2 produced, we need 1 mol FeS and 2 moles HCl

For 2.57 moles FeCl2 we need 2.57 moles FeS

Step 5: Calculate mass FeS

Mass FeS = 2.57 moles * 87.92 g/mol

Mass FeS = 226 grams FeS

We need 226 grams of FeS

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3 years ago
How did Moseley establish a more accurate periodic table?
GrogVix [38]
<span>B.by arranging the elements according to atomic number instead of atomic mass</span> awnser is B
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