Answer/explanation :
To calculate the number of mass, we use this formula
Number of mole = mass / molar mass
Since we are given the number of mole
Number of mole = 2.60mol
Mass = ?g
Molar mass of Li = 6.941g/mol
2.60mol = mass / 6.941 g/mol
Mass = 2.60 * 6.941
= 18.0466g
Therefore, the number of mass is 18.0466g
The strength of the gravitational force between two objects depends on two factors, mass and distance. the force of gravity the masses exert on each other. If one of the masses is doubled, the force of gravity between the objects is doubled. increases, the force of gravity decreases.
<u>Answer:</u> The correct answer is Option c.
<u>Explanation:</u>
Weak acid is defined as the acid which does not get completely dissociated into its ions when dissolved in water. For Example: etc..
Strong acid is defined as the acid which gets completely dissociated into its ions when dissolved in water. For Example: etc..
Weak base is defined as the base which does not get completely dissociated into its ions when dissolved in water. For Example: etc..
Strong base is defined as the base which gets completely dissociated into its ions when dissolved in water. For Example: etc..
From the above information, it is clearly visible that the correct answer is Option c.
Answer:
The pH of the solution is 5.31.
Explanation:
Let " is the dissociation of weak acid - HCN.
The dissociation reaction of HCN is as follows.
Initial C 0 0
Equilibrium c(1- ) c c
Dissociation constant =
In this case weak acids is very small so, (1- ) is taken as 1.
From the given the concentration = 0.050 M
Substitute the given value.
Therefore, The pH of the solution is 5.31.
Answer:
Option A.
Explanation:
This is the reaction:
2Na + Cl₂ → 2NaCl
By stoichiometry, ratio is 2:2. So 2 mol of NaCl are produced by 2 moles of Na.
So the answer is 3.6 moles