Your Best answer would be D. <span>At the eutectic point, the melting point of a mixture of two compounds is sharp. Your can'i miss it. ;)</span>
<h3>
Answer:</h3>
0.017 moles PbNO₃
<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>
- Reading a Periodic Table
- Moles
<u>Stoichiometry</u>
- Using Dimensional Analysis
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
[Given] 4.5 g PbNO₃
[Solve] moles PbNO₃
<u>Step 2: Identify Conversions</u>
[PT] Molar Mass of Pb - 207.2 g/mol
[PT] Molar Mass of N - 14.01 g/mol
[PT] Molar Mass of O - 16.00 g/mol
Molar Mass of PbNO₃ - 207.2 + 14.01 + 3(16.00) = 269.21 g/mol
<u>Step 3: Convert</u>
- [DA] Set up:
- [DA] Multiply/Divide [Cancel out units]:
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 2 sig figs.</em>
0.016716 moles PbNO₃ ≈ 0.017 moles PbNO₃
Atomic number Carbon = 6
14 mass - 6 protons = 8 neutrons
mass (protons+neutrons) - atomic number (protons #) = neutrons #
a compound of hydrogen and carbon, such as any of those which are the chief components of petroleum and natural gas.
"the rain is rich in benzene and hydrocarbons"