Answer: Option (b) is the correct answer.
Explanation:
To find molarity, firstly we need to calculate number of moles as follows.
No. of moles =
=
=
Therefore, molratity is defines as number of moles of solute present in liter of solution.
Molarity =
=
=
Thus, we can conclude that molarity of solution is .
Observations in the scientific method lead to questions which need answers. The hypothesis is a testable argument presented in scientific method to address a question. Experiments (often with controls and variables) are formulated in the experimental method for evaluating theories. Hope this helps ✨
Answer:
11.58 g
Explanation:
First we convert the given masses of both reactants into moles, using their respective molar masses:
- 6.89 g CaO ÷ 56 g/mol = 0.123 mol CaO
- 13.79 g H₂O ÷ 18 g/mol = 0.766 mol H₂O
As<em> 1 H₂O mol reacts completely with 1 CaO mol,</em> and there are more H₂O moles than CaO moles, water is the non limiting reactant.
We calculate the mass of the reacting moles of water (the same number of CaO moles, 0.123):
- 0.123 mol H₂O * 18 g/mol = 2.21 g
Finally we <u>calculate how many grams of water remained after the reaction</u>:
- 13.79 g - 2.21 g = 11.58 g