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emmainna [20.7K]
3 years ago
13

1. List the seasons from longest to shortest, including the number of days in each season.

Chemistry
1 answer:
GenaCL600 [577]3 years ago
4 0
Search it up bro it’s on the internet lol
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What does frequency describe? A.distance from crest to crest or from trough to trough on a wave B.Number of waves that pass a gi
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Answer:

B.Number of waves that pass a given point in a given time.

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What is a substance's melting point?
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A melting point of a substance is a point at which the sample or substance start converting in liquid. For most substances, melting and freezing points are approximately equal. For example, the melting point and freezing point of mercury is 234.32 kelvins (−38.83 °C or −37.89 °F). Hope this helped!! :)

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A car travels 350 km in 7 hours. What is the average speed of the car (in km/hr)?
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Answer:

50 km/hr

Explanation:

just divide the distance by the time (350/7)

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What is the charge of this atom? <br> 65 protons <br> 60 electrons <br><br> A)-5<br> B)+5<br> C)0
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Given the following unbalanced equation:
Lorico [155]
<h3>Answer:</h3>

8.01 mol MgO

<h3>General Formulas and Concepts:</h3>

<u>Math</u>

<u>Pre-Algebra</u>

Order of Operations: BPEMDAS

  1. Brackets
  2. Parenthesis
  3. Exponents
  4. Multiplication
  5. Division
  6. Addition
  7. Subtraction
  • Left to Right<u> </u>

<u>Chemistry</u>

<u>Atomic Structure</u>

  • Moles
  • Compounds

<u>Stoichiometry</u>

  • Using Dimensional Analysis
  • Analyzing Reactions RxN
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Unbalanced] Mg + O₂ → MgO

[RxN - Balanced] 2Mg + O₂ → 2MgO

[Given] 8.01 moles Mg

[Solve] moles MgO

<u>Step 2: Identify Conversions</u>

[RxN] 2 mol Mg → 2 mol MgO

<u>Step 3: Stoich</u>

  1. [DA] Set up:                                                                                                       \displaystyle 8.01 \ mol \ Mg(\frac{2 \ mol \ MgO}{2 \ mol \ Mg})
  2. [DA] Multiply/Divide [Cancel out units]:                                                          \displaystyle 8.01 \ mol \ MgO
3 0
3 years ago
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