Answer : The correct formula of manganese(II) chloride and manganese(II) oxide is and respectively.
Explanation :
As we know that the chemical formula is formed by the criss-cross method.
In criss-cross method, the oxidation state of the ions gets exchanged and they form the subscripts of the other ions.
For formation of manganese(II) chloride, manganese will form having an oxidation state of +2 called as cation and anion is chloride with oxidation state of -1.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
For formation of manganese(II) oxide, manganese will form having an oxidation state of +2 called as cation and anion is oxide with oxidation state of -2.Thus they combine and their oxidation states are exchanged and written in simplest whole number ratios to give neutral .
Hence, the correct formula of manganese(II) chloride and manganese(II) oxide is and respectively.
Answer:
Iodine has more electron levels (rings) than fluorine.
Explanation:
On the periodic table, fluorine is on period 2 so it has 2 outer rings, iodine is on period 5 so it has 5 outer rings. The more rings the higher radius.
Answer:
you didnt show a picture, but if it just exposed then it will probably be a physical change
Explanation:
Why hello there!
The correct answer to your question is C because exothermic energy is based of on using heat and heat acts like the activation !
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The resistance of the heating element is 21.61 Ω
Given
The power dissipated = 1500 W
Voltage = 180 V
We know that
Power = Voltage * Current
⇒ Power / Voltage = Current
⇒ 1500 W/180 V = Current
⇒ 8.33 A = Current
In order to calculate the resistance of the heating element. We Have to apply the formula
Power = (Current)^2 * Resistance
⇒ Resistance = Power / (Current)^2
⇒ Resistance = 1500 W/ (8.33) ^2
⇒ Resistance = 21.61 Ω
Hence the resistance of the heating element is 21.61 Ω
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