Can someone help asap
1 answer:
You might be interested in
Explanation:
The given data is as follows.
Energy needed for 1 mole = 279.7 kJ =
= 279700 J
Therefore, energy required for 1 atom will be calculated as follows.
=
As relation between energy and wavelength is as follows.
E =
where, h = planck constant =
c = speed of light =
= wavelength
Therefore, putting given values into the above formula as follows.
E =
=
=
or, = m
= 428 nm
Thus, we can conclude that the maximum wavelength of light that can remove an electron from an atom on the surface of lithium metal is 428 nm.
<h3>Answer:</h3>
0.0520 mol Zn
<h3>General Formulas and Concepts:</h3><u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
- Left to Right<u> </u>
<u>Chemistry</u>
<u>Atomic Structure</u>
- Reading a Periodic Table
<u>Stoichiometry</u>
- Using Dimensional Analysis
<u>Step 1: Define</u>
3.40 g Zn
<u>Step 2: Identify Conversions</u>
Molar Mass of Zn - 65.39 g/mol
<u>Step 3: Convert</u>
- Set up:
- Divide:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
0.051996 mol Zn ≈ 0.0520 mol Zn