Answer:A. They demonstrated emotions
Explanation: Ottonian manuscript are illuminated manuscripts,metal works which represented religious texts and believes. This art works were made in Germany during the Renaissance period lasting between the tenth and eleventh century. The Ottonian manuscripts and art works were produced by monks and nuns in the monasteries during those periods. The people of the Ottonian Kingdom loved mathematics and it was reflected in the art works which they produced during those times.
Strong electrolytes by definition are those compounds that completely dissociates into their component ions when dissolved in water. The chemical formula for the zinc fluoride is,
ZnF2
This means that each formula unit is composed of one atom of zinc and 2 atoms of fluoride. The ions comprising the unit are Zn²⁺ and F⁻. The dissociation is as shown below,
ZnF₂ --> Zn²⁺ + 2F⁻
When dissolved in water it is expected that the compound dissociates into three different ions, one Zn²⁺ and two F⁻.
Answer:
153.3 grams of ZrCl₄ are produced
Explanation:
The equation of the reaction is as follows:
ZrSiO₄ + Cl₂ ----> ZrCl₄ + SiO₂ + O₂
molar mass of ZrSiO₄ = (91 + 32 + 16 * 4) = 187.0 g/mol
molar mass of ZrCl₄ = (91 + 35.5 * 4) = 233.0 g/mol
molar mass of Cl₂ = (35.5 * 2) 71.0 g/mol
From the equation of reaction, 1 mole of ZrSiO₄ reacts with one mole of Cl₂ to produce one mole of ZrCl₄
number of moles of ZrSiO₄ present in 123 g = 123/187 = 0.65 moles
number of moles of Cl₂ present in 85.0 g = 85.0/71.0 = 1.19 moles
therefore, ZrSiO₄ is the limiting reactant
123.0 g of ZrSiO₄ will react with excess Cl₂ to produce 123 * 233/187 grams of ZrCl₄ = 153.3 grams of ZrCl₄
Therefore, 153.3 grams of ZrCl₄ are produced
Answer: The correct answer is Francium and Fluorine.
Explanation:
The most vigorous chemical reaction will occur between the most reactive metal and most reactive non-metal.
Reactivity of metal is defined as the tendency of elements to loosing electrons easily. Reactivity of metals decreases as we move from left to right and increases as we move down in the group. Hence, the most reactive metal is Francium.
Reactivity of non-metals is defined as the tendency of the element to gain electrons easily. Reactivity of non-metals increases across a period and decreases as we move down in a group. Hence, the most reactive non-metal is Fluorine.
Therefore, the most vigorous chemical reaction will occur between Francium and Fluorine.