Answer:
Lead
Explanation:
As you move down the periodic table, the elements get larger and gain additional electron shells, increasing the radius. In order, they are on the table as Chlorine, Selenium, Lead.
1.59moles
Explanation:
Mass of CaO = 89.23g
Unknown
Number of moles = ?
Solution:
The mole is a unit of measurement in chemistry used to delineate the number of particles an atom contains.
A mole of a substance contains the avogadro's number of particles.
Number of moles =
Molar mass of CaO = 40 + 16 = 56g/mol
Number of moles = = 1.59moles
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Answer:
molecular eq.
Cs2SO4 (aq) + BaBr2(aq) → BaSO4(s) + 2CsBr(aq)
ionic eq.
SO₄²-(aq) + Ba^+2 (aq) → BaSO4 (s)
explanation
separate the ions
Cs₂^+1(aq) + SO₄^+2(aq) + Ba^+2(aq) + Br₂^-1(aq) → BaSO₄(s) + 2Cs(aq) + Br(aq)
than simplify it
SO₄²-(aq) + Ba^+2 (aq) → BaSO4 (s)
Water is a pure substance, however it is made up of oxygen and hydrogen atoms, hence the nickname H2O (Hydrogen2, Oxygen)
Answer:
its not actually proven its just a hypothesis because they can't dig that deep because of the pressure