Awhite crystalline salt conducts electricity when it is melted and when it dissolves in water. what type of bond is this? a) ionic b) metallic c) covalent d) network
Option (a) is the correct answer.
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Ionic salts are defined as the salts which tend to contain ionic bonds as there occurs transfer of electrons between its combining atoms.
So, when an ionic salt melts or it is dissolved in water then it will dissociate into its respective ions and as electricity is the flow of electrons or ions. Hence, this salt is then able to conduct electricity.
As covalent compounds are insoluble in water so, they do no dissociate into ions. Hence, they do not conduct electricity.
Similarly, metallic and network solids do not dissociate into ions either when melted or dissolved in water. Therefore, they also do not conduct electricity.
Thus, we can conclude that when a white crystalline salt conducts electricity when it is melted and when it dissolves in water then this bond is of ionic type.
where p – pressure
v – volume
n – number of moles
r – universal gas constant
t – temperature
so if the pressure, volume and temperature are already known
we are left with n and r
since r is the universal gas constant that has a known fixed value then r too is known
so we are left with “n”
once we know temperature volume and pressure
we can find the number of moles of gas present using the ideal gas law equation
this is not my own answer, this is an answer for the same question by the user blahblahmali. i do not claim ownership of this account.
as given the equation is
2al + 6 hcl > 2 alcl3 + 3 h2(g)
as per equation two moles of aluminum reacts with six moles of hcl to give two moles of alcl3 and three moles of hydrogen gas
given: three moles of al are present and 7 moles of hcl
for three moles of aluminum nine moles of hcl will be required
however as 7 moles of hcl are present so the limiting reagent is hcl
hcl is going to decide the number of moles of product formed
when six moles of hcl are present = 3 moles of h2 are formed
when one mole of hcl is present == 3/6 mole sof h2 will be formed
when 7 moles of hcl are present = 3 x 7/ 6 moles of h2 will be formed = 3.5 moles of h2
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