So, the answer to 27.) would be <em>2x.</em> Both 6x and 2x can be divided by 2x, but they can't go any higher without the end-answer becoming a fraction. As such, 2x is the greatest common factor.
For 28.), x and x^2 can't be like terms, since like terms have the same variable and exponent :)
Hope I could help!
Answer: The lead-containing reactant(s) consumed during recharging of a lead-acid battery is
Explanation:
In lead acid battery, the anode is made up of lead and undergoes oxidation during discharging and cathode is made up of lead oxide and acts as cathode during discharging. The electrolyte used is dilute .
Charging:
Cathode : reduction :
Anode: oxidation :
Overall reaction :
The lead-containing reactant(s) consumed during recharging of a lead-acid battery is
<u>Answer:</u> Moles of iron for the given amount is 17.90 moles.
<u>Explanation:</u>
We are given 1 kg of iron and we need to find the moles of it. To calculate the moles, we use the following equation:
Mass of iron given = 1kg = 1000 grams (Conversion Factor: 1 kg = 1000g)
Molar mass of iron = 55.85g/mol
Putting values in above equation, we get:
Hence, moles of iron for the given amount is 17.90 moles.
Answer:
- <em>The effective nuclear charge of an electron in a 5p orbital of iodine is </em><u> 5</u>
Explanation:
The <em>effective nuclear charge, Zeff </em> is the net charge when you subtract the charge of the shielding electrons (number of electrons between your electron and the electrons in levels closer to the nucleus than yours) from the total nuclear charge (number of protons). Too many words, so see the equation:
- Zeff = atomic number - shielding electrons
Iodine has atomic number (number of protons) equal to 53.
Hence, the neutral atom also has 53 electrons.
The electron configuration of iodine is [₃₆Kr] 5s² 4d¹⁰ 5p⁵ (36 + 2 + 10 + 5 = 53)
So, iodine has 5 p electrons and they belong to the highest energy level. The remaining 53 - 5 = 48 electrons are in lower energy levels, and they are the shielding electrons. That is why the shielding parameter is 48.
So, you just must use the equation:
- Zeff = atomic number - shielding electrons
- Zeff = 53 - 48 = 5 ← answer
It is saturated when the solute is dissolved in the solvent. It is supersaturated when the solute is not/cannot be dissolved by the solvent.