A. zinc
Explanation:
Zinc and Cadmium are in the same group. Elements in the same group have similar characteristics and properties. Hope this helps!
To answer this item, we let x be the amount of the solution
that is 9% vinegar in mL and y be the amount of the solution that is 14%
vinegar, also in mL. The system of linear equation that would best allow us to
answer this item is,
<span> x
+ y = 290</span>
<span> 0.09x
+ 0.14y = 0.13(290)</span>
<span>The values of x and y in the equations are 58 and 232.
Thus, the amounts of the 9% vinegar solution and 14% vinegar solution are 58
and 232 mL, respectively. </span>
Answer: 0.5 M
Explanation:
Ammonium chloride has a gram formula mass of 53.49 g/mol, so 26.8 grams of ammonium chloride is 26.8/53.49 = 0.501 mol.
So since molarity = (moles of solute)/(liters of solution), the answer is 0.501 / 0.25 = 0.5 M
Answer:
A “Lab Diamond” is just like a Natural Diamond, except instead of growing in the Earth, they grow in a lab. The only chemical difference between Lab Diamonds vs Natural Diamonds is that most Natural Diamonds contain tiny amounts of nitrogen, and Lab Diamonds do not.
Explanation:
Answer:
0.544 eV; Ag is a smaller atom.
Explanation:
1. Ionization energy of hydrogen
The outermost electrons in Rb and Ag are in 5s orbitals.
The formula for the energy of an electron in a hydrogen atom is
E = -13.6/n² eV
For a hydrogen atom in a 5s orbital,
E = -13.6/5² = -13.6/25 = -0.544 eV
The ionization energy would be 0.544 eV.
2. Rb vs Ag
The first electrons to be removed from Rb and Ag are in 5s orbitals.
The atomic radius of Ag is less than that of Rb because, as you go from left to right across the Row, you are adding 10 protons to the nucleus and 10 electrons to the outer shell.
The added electrons do not effectively shield each other from the attraction of the nucleus, so the 5s electron of Ag is closer in.
It takes more energy to remove the electron from silver, so the ionization energy of Ag is greater than that of Rb.
