Answer:
Explanation:
epulsion and attraction
Two charged objects will: repel each other if they have like charges (they are both positive or both negative) attract each other if they have opposite charges (one is positive and the other is negative)
Answer:
9
Explanation:
Given parameters:
Concentration of OH⁻ [OH]= 1 x 10⁻⁹M
Solution:
To find the pOH of a solution can be found using the expression below:
pOH = -log₁₀[OH]
[OH] = concentration of the hydroxyl ions
pOH = -log₁₀(1 x 10⁻⁹) = - x -9 = 9
Answer:
84.0 g/mol
Explanation:
Molar mass of NaHCO₃ = ?
Solution:
Molar mass is the sum of masses of all atom present in formula.
Molar mass of sodium = 23 g/mol
Molar mass of hydrogen = 1.008 g/mol
Molar mass of carbon = 12 g/mol
Molar mas of Oxygen = 16 g/mol
Molar mass of NaHCO₃ = 23 + 1.008 + 12 + 16× 3
Molar mass of NaHCO₃ = 23 + 1.008 + 12 + 48
Molar mass of NaHCO₃ = 84.008 g/mol
To the nearest tenth = 84.0 g/mol
As there is a strong electrostatic force of attraction between the positive metal ions and the negatively charged electrons, more energy is needed to overcome these forces of attractions and hence, high melting and boiling points
Hope this will help you
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Answer:
Correct Answer: B. (60⋅12)+(40⋅13)
Explanation: