Both have a continuous light spectra the fluorescent source makes a spectra with more intense bands of mercury
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Explanation:
The pH of a strong acid when titrated with a strong base is equal to 7 because of the formation of a neutral salt which corresponds to pH = 7.
But on the other hand,
The titration of the weak acid and strong base, the reaction taking place is:
HC₂H₃O₂ + OH⁻ ⇒ H₂O + C₂H₃O₂⁻
At the equivalence point, the pH is greater than 7 because of the conjugate base formed in the above reaction which gives OH⁻ in the solution as:
C₂H₃O₂⁻ + H₂O ⇒ HC₂H₃O₂ + OH⁻
<u>The hydroxide ions produced in the above reaction results in the pH above 7 (basic).</u>
Correct answers are D, A, A, B, A
<span>1) V1/T1=V2/T2 --> V2 = V1x(T2/T1) = 300cm³ x (333K/303K) = 330cm³ (assuming constant P) </span>
<span>2) V1/T1=V2/T2 -->V1=V2x(T1/T2) = 1.0Lx(300K/100K) = 3.0L </span>
<span>3) you have 2x as many moles of antacid ---> 2x as many moles of gas...V1/n1 = V2/n2 ---> V2 = V1 x (n2/n1).. double the moles, double the volume... so gas from 4 tablets > gas from 2 tablets. </span>
<span>4) P1/T1=P2/T2 ---> P2=P1x(T2/T1)..if T was left in °C, P2=100kPax(10°C/60°C) = 17kPa. T MUST be in absolute temperature. either K or R. never °F nor °C. units of P do not matter. </span>
<span>5).. constant T,n = boyles, constant P,n = charles, constant V,n = Gay-Lussac's</span>
Explanation:
First Question:
The equation is given as;
2KClO3 --> 2KCl + 3O2
2 mol of KClO3 produces 2 mol of KCl
Converting 7.6 g of KCl to mol;
Number of moles = Mass / Molar mass = 7.6 / 74.5513 = 0.1019
2 mol = 2 mol
x mol = 0.1019
solving for x;
x = 0.1019 mol of KClO3
converting to mass;
Mass = Number of mol * Molar mass = 0.1019 * 122.55 = 12.48
Correct option = B. 12.5 g
Second Question
The equation is given as;
1N2 + 3H2 --> 2NH3
3 mol of H2 produces 2 mol of NH3
Converting 34.06g of NH3 to mol;
Number of moles = Mass / Molar mass = 34.06 / 17.031 = 2 mol
3 mol = 2 mol
x mol = 2 mol
Solving for x;
x = 6 / 2 = 3 mol of H2
Converting 3 mol H2 to g;
Mass = Number of moles * Molar mass = 3 * 2.016 = 6.048g
Correct option: B. 6.05g
I'll say francium, if the question is right
