Answer:
1.126 M
Explanation:
From the question given, we obtained the following:
Mass of LiBr = 98g
Volume = 1 L
Molarity of LiBr =?
Next, we'll determine the number of mole of LiBr. This is illustrated below:
Molar Mass of LiBr = 7 + 80 = 87g/mol
Mass of LiBr = 98g
Number of mole = Mass/Molar Mass
Number of mole of LiBr = 98/87
Number of mole of LiBr = 1.126 mole
Now, we can calculate the molarity of LiBr. This is illustrated below:
Molarity is defined as mole per unit litre of the solution. Mathematically, it is represented as:
Molarity = mole /Volume
Mole of LiBr = 1.126 mole
Volume = 1 L
Molarity of LiBr =?
Molarity of LiBr = 1.126 mole /1 L
Molarity of LiBr = 1.126 M
Answer:
0.355 N of HF
Explanation:
The titration reaction of HF with KOH is:
HF + KOH → H₂O + KF
<em>Where 1 mole of HF reacts per mole of KOH</em>
<em />
Moles of KOH are:
0.0296L × (0.120 equivalents / L) = 3.552x10⁻³ equivalents of KOH = equivalents of HF.
As volume of the titrated solution was 10.0mL, normality of HF solution is:
3.552x10⁻³ equivalents of HF / 0.010L =<em> 0.355 N of HF</em>
<span>1. B .......... it has less ioni. energy, less likely to form ion and react, therefore its a halogen under Cl on the periodic table, and has a wider radius due to more shells
2. B ...........ionic bond = cation + anion, Mg has charge 2+ and Cl has charge 1- forming MgCl2
also Mg is a metal and Cl is non metal
but H and Cl ions also bond to form hydrogenchloride. but both H and Cl are non-metals. so B is the best answer.</span>
This is a common laboratory experiment called calorimetry which determines the specific heat capacity of the sample metal.
By the Conservation of Energy,
Energy of Metal = Energy of Water
mCmetalΔT = mCwaterΔT, wherein Cwater = 4.187 J/g·°C
(26.5 g)(Cmetal)(98 - 32.5°C) = (150 g)(4.187 J/g·°C)(32.5 - 20°C)
Solving for Cmetal,
<em>Cmetal = 4.523 J/g·°C</em>
Research for alternative energy sources have been positively affected, because of other reasons (excluding those EliteAnswers listed), such as:
1) Renewability: This means that resources are replaced as fast as they are used, meaning that they would not run out
2) Cleaner: Most alternative energy would not have the effect of polluting the earth after it is used, and may be easier to clean (if even need to)
hope this helps
