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AnnyKZ [126]
3 years ago
12

Why are some alkali metals stored under oil?

Chemistry
2 answers:
Dahasolnce [82]3 years ago
6 0

due to there reactive rate?

Fiesta28 [93]3 years ago
5 0

Alkali metals are stored under oil because of their high reactivity. Alkali metals must be stored under oil to prevent reaction with air.

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You weigh out 0.1183 g of a complex salt to analyze for the percentage of cyanide ion in your complex salt. After dissolving the
Stels [109]

Answer:

25.35%

Explanation:

Again let me restate the the equation of the reaction;

H2O (ℓ) + 2 MnO4 - (aq) + 3 CN- (aq) → 2 MnO2 (s) + 3 CNO- (aq) + 2 OH- (aq)

Amount of potassium permanganate  reacted = 10.2/1000 * 0.08035 = 8.1957 * 10^-4 moles

If 2 moles of MnO4 - reacts with 3 moles of CN-

8.1957 * 10^-4 moles of MnO4 - reacts with 8.1957 * 10^-4 * 3/2

= 1.229 * 10^-3 moles of CN-

Mass of CN- reacted = 1.229 * 10^-3 moles of CN- * 26.02 g/mol

= 0.03 g

Hence, percentage of the cyanide = 0.03 g/0.1183 g * 100

= 25.35%

8 0
3 years ago
The gas in a cylinder has a volume of 8 liters at a pressure of 101 kPa. The pressure of the gas is increased to 206 kPa. Assumi
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3 years ago
Aluminium is a metal give reason​
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When most liquids freeze, explain what happens to the motion and the space between the atoms.
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Why the size of Na+ is smaller then Na <br><br>​
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