An elements’ neutral atoms have 5 valance electrons and 3 electron shells. What element is it?

Chemistry

1 answer:

Elodia [21]3 years ago

3 0

Answer:

Phosphorus

Explanation:

Group 5A has 5 valence electrons.

3 electron shells equals 15 electrons on Phosphorus. Furthermore, 2 on shell 1, 8 on shell 2, and 5 on shell 3.

- Hope that helps! Please let me know if you need further explanation.

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What mass of Al2(SO4)3 results from mixing 12.93 g of AlCl3 with 10.34 g of (NH4)2SO3 as shown with a 54.2% yield?

avanturin [10]

Mass of Al₂(SO₄)₃ : 4.822 g

<h3>Further explanation </h3>

A reaction coefficient is a number in the chemical formula of a substance involved in the reaction equation. The reaction coefficient is useful for equalizing reagents and products.

Reaction

2AlCl₃ + 3(NH₄)₂SO₄⇒Al₂(SO₄)₃+ 6NH₄Cl

MW AlCl₃ :133,34 g/mol

MW (NH₄)₂SO₄ : 132,14 g/mol

MW Al₂(SO₄)₃ : 342,15 g/mol

mol AlCl₃

$\tt mol=\dfrac{12.93}{133.34}=0.097$