Answer:
0.19 mol H₂O
General Formulas and Concepts:
<u>Chem</u>
- Reading a Periodic Table
- Using Dimensional Analysis
Explanation:
<u>Step 1: Define</u>
Given: 3.5 g H₂O from RxN
<u>Step 2: Define conversions</u>
Molar Mass of H - 1.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of H₂O - 2(1.01) + 16.00 = 18.02 g/mol
<u>Step 3: Convert</u>
<u />
= 0.194229 mol H₂O
<u>Step 4: Check</u>
<em>We are given 2 sig figs. Follow sig fig rules.</em>
0.194229 mol H₂O ≈ 0.19 mol H₂O
A car tire, it’s the only thing you can resale :)
Lower left corner and the upper right corner before the noble gases
Number of valence electrons
Explanation:
The most reactive elements are the most electropositive and electronegative elements.
Francium is the most reactive metal and flourine the most reactive non-metals.
Francium is the most electropositive metal and fluorine is the most electronegative non-metal.
Electropositivity is the ability of an atom to willingly lose its valence electrons. This is typical of metals.
Electronegativity is the ability of atoms to attract the shared electrons to themselves in a bond.
- An element is more reactive than another based on the number of valence electrons it has.
- The valence electrons determines how reactive an atom is or would be.
- Elements that requires just one or two electrons to complete their octet would be highly reactive and dire need to find such electron.
- Also, elements with just an electron above the stable configuration will easily want to lose it.
- Elements with a complete configuration will not be reactive.
The valence electrons are the electrons in the outer most shell of an atom used in chemical bonding.
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Reactivity brainly.com/question/6496202
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