The polarity of a water molecule comes from the uneven distribution of electron density of hydrogen and oxygen atom. The oxygen in the water molecule is more electronegative than the hydrogen. Water has a partial positive charge near the hydrogen atom and a partial negative charge near the oxygen atom. The result of this electrostatic attraction results in the bond called hydrogen bond. Also, because of this bond, it has the ability to dissolve most of the solutes due to its polarity and bonding.
* NaChO and Pb(ClO)
* Na SO and SrSO
* NaNO and Pb(NO)
* NaC H O and Pb ( C H O )
B. political
C. manufacturing
D. military
Answer:
C. manufacturing
Explanation:
With the Independence of the Thirteen Colonies in 1776, the colonies became independent states, but united in a Federation, with republican and presidential political representation. States in the northern region concentrated on the development of industry and, to that end, needed free and salaried labor to operate the work within the factories. Prior to the secession war, the northern states had 80 percent of manufacturing capacity in the United States. The formation of the working class and the industrial bourgeoisie in the North has also produced a specific way of looking at political activity and civil rights.
Answer:
Considering the reaction stoichiometry and the definition of limiting reagent, the mass of AlCl₃ that is produced when 10.0 grams of Al₂O₃ react with 10.0 grams of HCl is 12.19 grams.
Explanation:
Al₂O₃ + 6 HCl → 2 AlCl₃ + 3 H₂O
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
Al₂O₃: 1 mole
HCl: 6 moles
AlCl₃: 2 moles
H₂O: 3 moles
The molar mass of the compounds present in the reaction is:
Al₂O₃: 102 g/mole
HCl: 36.45 g/mole
AlCl₃: 133.35 g/mole
H₂O: 18 g/mole
Then, by reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of mass of each compound participate in the reaction:
Al₂O₃: 1 mole× 102 g/mole= 102 grams
HCl: 6 moles× 36.45 g/mole= 218.7 grams
AlCl₃: 2 moles× 133.35 g/mole= 266.7 grams
H₂O: 3 moles× 18 g/mole= 54 grams
The limiting reagent is one that is consumed first in its entirety, determining the amount of product in the reaction. When the limiting reagent is finished, the chemical reaction will stop.
To determine the limiting reagent, it is possible to use a simple rule of three as follows: if by stoichiometry 102 grams of Al₂O₃ reacts with 218.7 grams of HCl, 10 grams of Al₂O₃ reacts with how much moles of HCl?
mass of HCl= 21.44 grams
But 21.44 grams of HCl are not available, 10 grams are available. Since you have less moles than you need to react with 10 grams of Al₂O₃ , HCl will be the limiting reagent.
Then, it is possible to determine the mass of AlCl₃ produced by another rule of three: if by stoichiometry 218.7 grams of HCl produce 266.7 grams of AlCl₃, if 10 grams of HCl react how much mass of AlCl₃ will be formed?
mass of AlCl₃= 12.19 grams
In summary, the mass of AlCl₃ that is produced when 10.0 grams of Al₂O₃ react with 10.0 grams of HCl is 12.19 grams.
two metal anions
a metal cation and a nonmetal anion
two nonmetal cations
ionic compounds are held together by ionic bonds are formed by the transfer of electrons from a metal to a non metal
Ionic bond is formed by the electrostatic attraction between the oppositely charged ions.
metals give out electrons and becomes positively charged. positively charged ions are called cations. so these are called metal cations
the electrons given out are taken in by non metals and become negatively charged. negatively charged ions are called anions. then they are called non metal anions.
so ionic compounds are formed by the electrostatic attraction between metal cations and non metal anions.
therefore ionic compounds are composed of a metal cation and a nonmetal anion