Answer:
It's A.
Atoms that have the same number of valence electrons in their outer shell have similar properties and belong to the same family of elements.
Answer:
These tests determine the solubility of the compounds formed upon adding the test solution
Explanation:
Addition of Ba(NO₃)₂ will cause a precipitate ((Ba)₂SO₄) to form in the solution of (NH₄)₂SO₄. No precipitates will form in the other unknown solutions. Thus, whether or not the solution is ammonium sulfate can be determined.
Addition of NaCl solution will cause a precipitate (AgCl) to form in the solution of AgNO₃. No precipitates will form in the other unknown solutions. Thus, whether or not the solution is silver nitrate can be determined.
If no precipitates form, then the unknown solution must be KCl.
Mass Fe₂(SO₄)₃ : 31.79 g
<h3>F
urther explanation</h3>
Reaction
2FePO₄ + 3Na₂SO₄ ⇒ Fe₂(SO₄)₃ + 2Na₃PO₄
mol FePO₄ (MW=150,82 g/mol) :
mol Fe₂(SO₄)₃ : mol FePO₄ = 1 : 2, so mol Fe₂(SO₄)₃ :
mass Fe₂(SO₄)₃ (MW=399,88 g/mol) :
Answer:
It is about 30 percent of the solar radiation that is reflected back by the clouds. Normally 24 to 25 percent of solar radiation is reflected back. The earth's surface reflects back about 4% of the solar radiation. Around 7 percent of solar radiation is scattered back to space by the particles in the atmosphere.
