Answer:
C. Cl2 and SF6
Explanation:
- According to the Graham's law of diffusion the rate of effusion or diffusion of a fixed mass of a gas is inversely proportional to the square root of its density or mass.
- For two gases; R1/R2 = √mm2/√mm1 ; where R1 and R2 are the rates of diffusion of the two gases respectively, while mm1 and mm2 are the molecular masses respectively.
Therefore, in this case we need two gases that have a ratio of their rates of diffusion as 1.43.
Thus; For Cl2 and SF6
Molecular mass of Cl2 is 70.906 g/mol, while that of SF6 is 146.06 g/mol
Therefore, the ratio of their rates of diffusion will be;
√(MM of SF6)/√(MM of Cl2) = √ 146.06/√70.906
= 1.4352
= 1.43
Therefore; the two gases required are Cl2 and SF6
H₂SO₄ + Ba(OH)₂ -----> BaSO₄ + 2H₂O
Coefficient for sulfuric acid: 1
Two: Coefficients are the numbers in front of each formula. If no number is shown, a one is understood. Three: The coefficients tell us how many molecules (moles) of each reactant used and how many molecules (moles) of each product made.
Bases
A base is a substance that dissociates into more hydroxide ions (-OH-) when dissolved in water. Bases are also good proton acceptors. Bases, therefore, reduce the number of H+ and increase OH- hence raising the pH of the solution.
B(aq) + H₂O(l) ⇌ BH⁺(aq) + OH⁻(aq)
Explanation:
Other properties of bases is that they are bitter to the taste and they feel slippery when touched. Strong bases are nonthlese very corrosive like acids. Bases turn red litmus paper blue. Most alkali hydroxides such as NaOH are bases.
Learn More:
For more on bases check out;
brainly.com/question/12574229
brainly.com/question/2015251
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