Select the correct answer. A solution with 117 grams of lithium hydroxide and another with 141 grams of hydrogen bromide are com
1 answer:
The periodic table is the arrangement of the elements based on their atomic numbers. The theoretical yield of lithium bromide will be 151 gm.
<h3>What is a theoretical yield?</h3>A theoretical yield is the estimation of the number of moles of product formed in relation to the reactants consumed in a reaction.
The balanced chemical reaction can be shown as:
From the reaction, it can be seen that the moles of all the compounds and molecules are 1.
The molar mass of lithium hydroxide is calculated as:
6.94 + 15.999 + 1.008 = 23.947 gram per mol
The molar mass of hydrogen bromide is calculated as:
1.008 + 79.904 = 80.912 gram per mol
The moles of lithium hydroxide is calculated as:
The moles of hydrogen bromide is calculated as:
From this, it can be said that hydrogen bromide is a limiting reagent as it has fewer moles than LiOH.
The molar mass of lithium bromide is given as, 6.94 + 79.904 = 86.844 grams per mol
Mass of lithium bromide formed will be:
Therefore, the theoretical yield of lithium bromide is option C. 151 gm.
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Answer:
<h3>The answer is 7.85 g/mL</h3>Explanation:
The density of a substance can be found by using the formula
volume = final volume of water - initial volume of water
volume = 13.91 - 12 = 1.91 mL
We have
We have the final answer as
<h3>7.85 g/mL</h3>Hope this helps you
Answer : Both solutions contain molecules.
Explanation : The number of molecules of 0.5 M of sucrose is equal to the number of molecules in 0.5 M of glucose. Both solutions contain molecules.
Avogadro's Number is =
which represents particles per mole and particles may be typically molecules, atoms, ions, electrons, etc.
Here, only molarity values are given; where molarity is a measurement of concentration in terms of moles of the solute per liter of solvent.
Since each substance has the same concentration, 0.5 M, each will have the same number of molecules present per liter of solution.
Addition of molar mass for individual substance is not needed. As if both are considered in 1 Liter they would have same moles which is 0.5.
We can calculate the number of molecules for each;
Number of molecules = ;
∴ Number of molecules = which will be =
Thus, these solutions compare to each other in that they have not only the same concentration, but they will have the same number of solvated sugar molecules. But the mass of glucose dissolved will be less than the mass of sucrose.