Answer:
KOH
Explanation:
When ionic compounds (a metal and a nonmetal) dissolve, they are good conductors of electricity, and would result in the brightest light. Weak bases and covalent compounds do not dissolve, so KOH, a strong base and ionic compound, would dissolve and conduct electricity.
Its B homie i took the test !
Answer:
0.5 moles
Explanation:
At STP,
<u><em>Every 22.4 L of carbon dioxide contains 1 mole of gas.</em></u>
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Solving :
⇒ 22.4 L : 1 mole
⇒ 22.4 × 0.5 : 1 × 0.5
⇒ 11.2 L : 0.5 moles
Given :
Volume of stock solution, .
Volume of diluted solution, .
Molarity of diluted solution, .
To Find :
The concentration of the stock solution.
Solution :
We know, dilution factor is given by :
....1)
and ....2)
Putting volume in above equation, we get :
D.F = 400/20
D.F = 20
Putting value of D.F in equation 2) we get :
The concentration of stock solution is nearest to 30 M.
Therefore, the correct option is 1) 30 M.
The answer is mass
Hope this helps! :3