Which pair of formulas represents two compounds that are electrolytes?(1) HCl and CH3OH(2) HCl and NaOH(3) C5H12 and CH3OH(4) C5H12 and NaOH
Answers
Answer: Option (2) is the correct answer.
Explanation:
Electrolytes are the species that contain electric charges and are present as ions in a solution.
We can also say that ionic substances act as an electrolyte in a solution because ionic compounds have the ability to dissociate into ions.
For example,
and dissociate completly into ions when dissolved in wateror polar solvent.
Thus, we can conclude that out of the given options, HCl and NaOH is the pair of formulas represents two compounds that are electrolytes.
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Answers
(Use the gray boxes to insert the values for the conversion factors.)
5. What is the mass of 6.3 moles of Sulfur?
6.3 mol S x ( / ) = g S
6. How many atoms are in 6.0 moles of Argon?
6.0 mol Ar x ( / ) = atoms of Ar
7. How many moles of Kr are in 112 g of Krypton?
112 g Kr x ( / ) = moles of Kr
8. How many moles are in 1.93 x1024 formula units of KF, potassium fluoride?
1.93 x1024 formula units x ( / ) = mol KF
(The next two problems need 2 step conversions - so there are two conversion factors (fractions) for the problem - remember the mole map - covert to moles first, then to the desired unit.)
9. How many atoms are in 86.2 g of Si (silicon)?
86.2 g Si x ( / ) x ( / ) = atoms of silicon
10. What is the mass in grams of 4.8 x 1024 atoms of Magnesium?
4.8 x 1024 atoms of Mg x ( / ) x ( / ) = g Mg
Answers
Hence there are n=54*(1/108)=0.5 mols of Silver in 54 grams of Silver.
5. 6.3*(108/1)=680.4g
6. Avogadro's number : Na~=6.022×10^23.
6.0*(6.022*10^23/1)=36.132*10^23 atoms
7. Molar mass of Krypton : Mk=84 g/mol
112/84=1.33 moles of Kr
8. 1.93*10^24*(1/(6.022×10^23))=3.2 moles KF
9. Molar mass of Silicon : Ms=28 g/mol
86.2*(1/28)*(6.022×10^23/1)=18.5*10^23 atoms of silicon
10. Molar mass of Magnesium : M1=24 g/mol
4.8*10^24*(1/(6.022×10^23))*(24/1)=191 g Mg
Answers
H₂SO₄ = 98.0 g/mol
H₂SO₄ + 2 NaCl = 2 HCl + Na₂SO₄
98.0 g H₂SO₄ -----------> 2 x 58.44 g NaCl
? g H₂SO₄ ------------> 23.0 g NaCl
Mass of H₂SO₄ = 23.0 x 98.0 / 2 x 58.44
Mass of H₂SO₄ = 2254 / 116.88
=> 19.284 g of H₂SO₄
hope this helps!
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Correct Answer: Option 1) 2-pentene
Reason:
Following are the IUPAC rules for naming the compound
1) Select the longest carbon chain. In present case longest carbon chain has 5 carbon atom. Hence, it is a pentane derivative.
2) In case of alkene, replace 'e' of alkane by 'ene'
3) Give lowest number to function group. In present case, it is double bond.
Applying above rules, the IUPAC name of compound is 2-pentene
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I hope this helps :)
Answers
Explanation:
Sodium Sulphate Formula is
Na2SO4
where the ionic form is given as,
Na2+ SO42-