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yulyashka [42]
3 years ago
6

Use trends in the periodic table to predict the intensity of the following reactions. Match the letter of each reaction to the p

redicted result.
A. Lithium (Li) in water
B. Sodium (Na) in water
C. Potassium (K) in water



violent gas formation
strong gas formation
extremely violent gas formation
Chemistry
1 answer:
Shtirlitz [24]3 years ago
4 0
We can use the reactivity series of metals to solve this.

The reactivity series of metals are (in descending order) :
Potassium, sodium, Lithium, calcium, Magnesium, aluminum, zinc, iron, tin, lead, copper, mercury, silver, platinum, gold.

Since Potassium is the most reactive, the reaction with water should produce extremely violent gas.

Sodium is the next most reactive, so it should produce violent gas.

And Lithium is the least reactive out of the 3 metals, so it should be strong gas formation.

In addition, the gas produced should be hydrogen, since the reaction of metals should water should produce "metal name" hydroxide + hydrogen.
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When the potential difference across a lamp is 3.3V the current is 0.15 calculate the resistance of the lamp and give the unit
marissa [1.9K]

Answer:

22Ω

Explanation:

Given parameters:

Potential difference  = 3.3V

Current  = 0.15A

Unknown:

Resistance  = ?

Solution:

According to ohm's law, potential difference, current and resistance are related by the expression below;

             V = I R

where V is the voltage

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          R is the resistance

          3.3 = 0.15 x R

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Answer:

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Explanation:

hope this helps you

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