Answer:
Explanation:
El mol está relacionado con la masa de un elemento de la siguiente manera: un mol de átomos de carbono-12 tiene 6.02214076 × 1023 átomos y una masa de 12 gramos. En comparación, un mol de oxígeno consta, por definición, de la misma cantidad de átomos que el carbono-12, pero tiene una masa de 15.999 gramos.
Answer:
true
Explanation:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral
<u>Answer:</u> The molarity of solution is 0.34 M.
<u>Explanation:</u>
- To calculate the number of moles, we use the equation:
<u>For lead chloride:</u>
Given mass of lead chloride = 18.86 g
Molar mass of lead chloride = 278.1 g/mol
Putting values in above equation, we get:
- For the balanced chemical equation:
By Stoichiometry of the reaction:
1 mole of lead chloride is formed by 1 mole of lead nitrate
So, 0.068 moles of lead chloride will be formed from = of lead nitrate
- To calculate the molarity of solution, we use the equation:
We are given:
Volume of solution = 200 mL = 0.200 L (Conversion factor: 1 L = 1000 mL)
Moles of lead nitrate = 0.068 moles
Putting values in above equation, we get:
Hence, the molarity of solution is 0.34 M.
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