Answer:In general, the gross composition of cow's milk in the U.S. is 87.7% water, 4.9% lactose (carbohydrate), 3.4% fat, 3.3% protein, and 0.7% minerals (referred to as ash).
Explanation:
i got it ccorerct
I believe the answer is false. Hydrogen is in the S=1 energy level with helium which means that the only valence orbital hydrogen has is the 1s orbital. s orbitals only have 2 electrons in them meaning that in order for hydrogen to achieve a full valence energy level it would only need to gain 1 electron. Also if the question is asking how many electrons it would take for hydrogen atom to get an octet (eventhough it would never try to) it would still be false since it would need to fill the 2s and 2p orbitals after filling the 1s orbital. Hydrogen would need to gain 1 electron to fill the 1s orbital, 2 electrons to fill the 2s orbital, and 6 electrons to fill the 2p orbital which adds up to 9.
I hope this helps. Let me know if you have any further questions or if anything is unclear.
<u>The mass of hydrogen atoms in the sample of water is 3.98g</u>
This can be solved by understanding of Avogadro's number and mole relationship concept.
<h3 /><h3>Avogadro's number</h3>
<u>This is a proportionality that relates the number of particles to the amount of substance in that sample and it is given as </u>
A molecule of water have the chemical formula as HO. This implies that for every 1 atom or molecule of oxygen, 2 hydrogen must be present.
In the question given, we have atoms of oxygen. This implies we must have
Now, let's compare this molar mass - Avogadro's number
molar mass of hydrogen = 1g/mol
From the calculation above, we would have 3.98g of hydrogen present in that particles of oxygen.
learn more on Avogadro's concept
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A - Nuclear energy is non-renewable
Answer:
C. The lowest-energy electron configuration of an atom has the maximum number of unpaired electrons, all of which have the same spin, in degenerate orbitals.
Explanation:
The Hund's rule is used to place the electrons in the orbitals is it states that:
1. Every orbital in a sublevel is singly occupied before any orbital is doubly occupied;
2. All of the electrons in singly occupied orbitals have the same spin.
So, the electrons first seek to fill the orbitals with the same energy (degenerate orbitals) before paring with electrons in a half-filled orbital. Orbitals doubly occupied have greater energy, so the lowest-energy electron configuration of an atom has the maximum number of unpaired electrons, and for the second statement, they have the same spin.
The other alternatives are correct, but they're not observed by the Hund's rule.