Combustion Have a great day!
<h3>
Answer:</h3>
0.6 g NaCl
<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>
<u>Stoichiometry</u>
- Using Dimensional Analysis
<h3>
Explanation:</h3>
<u>Step 1: Define</u>
[RxN - Balanced] Na₂CO₃ (aq) + CaCl₂ (aq) → CaCO₃ (s) + 2NaCl (aq)
[Given] 0.5 g Na₂CO₃ reacted with excess CaCl₂
<u>Step 2: Identify Conversions</u>
[RxN] Na₂CO₃ → 2NaCl
Molar Mass of Na - 22.99 g/mol
Molar Mass of C - 12.01 g/mol
Molar Mass of O - 16.00 g/mol
Molar Mass of Cl - 35.45 g/mol
Molar Mass of Na₂CO₃ - 2(22.99) + 12.01 + 3(16.00) = 105.99 g/mol
Molar Mass of NaCl - 22.99 + 35.45 = 58.44 g/mol
<u>Step 3: Stoichiometry</u>
- Set up:
![\displaystyle 0.5 \ g \ Na_2CO_3(\frac{1 \ mol \ Na_2CO_3}{105.99 \ g \ Na_2CO_3})(\frac{2 \ mol \ NaCl}{1 \ mol \ Na_2CO_3})(\frac{58.44 \ g \ NaCl}{1 \ mol \ NaCl})](https://tex.z-dn.net/?f=%5Cdisplaystyle%200.5%20%5C%20g%20%5C%20Na_2CO_3%28%5Cfrac%7B1%20%5C%20mol%20%5C%20Na_2CO_3%7D%7B105.99%20%5C%20g%20%5C%20Na_2CO_3%7D%29%28%5Cfrac%7B2%20%5C%20mol%20%5C%20NaCl%7D%7B1%20%5C%20mol%20%5C%20Na_2CO_3%7D%29%28%5Cfrac%7B58.44%20%5C%20g%20%5C%20NaCl%7D%7B1%20%5C%20mol%20%5C%20NaCl%7D%29)
- Multiply/Divide:
![\displaystyle 0.551373 \ g \ NaCl](https://tex.z-dn.net/?f=%5Cdisplaystyle%200.551373%20%5C%20g%20%5C%20NaCl)
<u>Step 4: Check</u>
<em>Follow sig fig rules and round. We are given 1 sig fig.</em>
0.551373 g NaCl ≈ 0.6 g NaCl
<h3><u>Answer;</u></h3>
- Molecules along the surface of a liquid behave differently than those in the bulk liquid.
- Cohesive forces attract the molecules of the liquid to one another.
- Surface tension increases as the temperature of the liquid rises
<h3><u>Explanation;</u></h3>
- Surface tension is measured as the energy required to increase the surface area of a liquid by a unit of area. The surface tension of a liquid results from an imbalance of intermolecular attractive forces, the cohesive forces between molecules.
- A molecule in the bulk liquid experiences cohesive forces with other molecules in all directions, while a molecule at the surface of a liquid experiences only net inward cohesive forces.
- Surface tension decreases when temperature increases because cohesive forces decrease with an increase of molecular thermal activity.
Scientific law
Explanation:
A scientific law is a term that refers to a fact that naturally occurs in the universe.
Scientific laws are natural laws and they hold true.
- Scientific law is a well tested idea that holds through for a range of natural events.
- Scientific theories are explanations of phenomenons drawn from series of tests.
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Gamma radiation because it can pass through several centimeters of lead also