A model for a potential chemical reaction is shown here. Evaluate the model and the reaction shown. Which statements are correct
about this model. Select ALL that apply.
A) The law of conservation of matter is followed in this model.
B) Conversation of matter is not observed because of some of the atoms are converted into energy in the reaction.
C) Conservation of matter is observed because there are the same number of each atom on both sides of the reaction.
D) Conservation of matter is not observed because there are different numbers of molecules in the reactants and the products. 
A) The law of conservation of matter is followed in this model.
B) Conversation of matter is not observed because of some of the atoms are converted into energy in the reaction.
C) Conservation of matter is observed because there are the same number of each atom on both sides of the reaction.
D) Conservation of matter is not observed because there are different numbers of molecules in the reactants and the products.
1 answer:
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<u>Answer:</u> The moles of hydroxide ions present in the sample is 0.0008 moles
<u>Explanation:</u>
To calculate the concentration of acid, we use the equation given by neutralization reaction:
where,
are the n-factor, molarity and volume of acid which is HCl.
are the n-factor, molarity and volume of base which is
We are given:
Putting values in above equation, we get:
To calculate the moles of hydroxide ions, we use the equation used to calculate the molarity of solution:
Molarity of solution = 0.011 M
Volume of solution = 36.0 mL
Putting values in above equation, we get:
1 mole of calcium hydroxide produces 1 mole of calcium ions and 2 moles of hydroxide ions.
Moles of hydroxide ions = (0.0004 × 2) = 0.0008 moles
Hence, the moles of hydroxide ions present in the sample is 0.0008 moles