I believe your answer will be 40
This is known as the element IR. (<span>Iridium) Iridium has the atomic number of 77 therefore has </span>
"77 protons, 77 electrons, and 116 neutrons." You can figure out how many protons and electrons a element has by looking at the atomic number. In this case the atomic number is 77 therefore it will have 77 protons and electrons!
Hope this helps!
Answer: A
0 degrees and 101 kPa are the conditions that describe the standard temperature and pressure. When expressed in K, the standard temperature 0 degrees equals 273.5 K. Also the standard pressure 101 kPa equals 760 mmHg or 1 Atm.
<h3>
Answer:</h3>
0.000104 mol
<h3>
General Formulas and Concepts:</h3>
<u>Math</u>
<u>Pre-Algebra</u>
Order of Operations: BPEMDAS
- Brackets
- Parenthesis
- Exponents
- Multiplication
- Division
- Addition
- Subtraction
<u>Chemistry</u>
<u>Atomic Structure</u>
- Avogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.
<u>Stoichiometry</u>
- Using Dimensional Analysis
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
6.27 × 10¹⁹ atoms
<u>Step 2: Identify Conversions</u>
Avogadro's Number
<u>Step 3: Convert</u>
- Set up:
- Multiply/Divide:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 3 sig figs.</em>
Since our final answer already has 3 sig figs, there is no need to round.
an electromagnet wave can go through objects