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Natasha2012 [34]
3 years ago
12

The sun rotates on it axis once every: 28 hours 120 days 25 days 9 hours

Chemistry
1 answer:
olganol [36]3 years ago
8 0

Answer:

Itś about 27 days so just pick 28!

Explanation:

Hope this helped!

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CH4 + 202 → CO2 + 2H2O<br> How many moles O2 needed to produce 4 moles of H2O?
shepuryov [24]
<h3>Answer:</h3>

4 mol O₂

<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>Chemistry</u>

<u>Atomic Structure</u>

  • Reading a Periodic Table

<u>Stoichiometry</u>

  • Using Dimensional Analysis
<h3>Explanation:</h3>

<u>Step 1: Define</u>

[RxN - Balanced]   CH₄ + 2O₂ → CO₂ + 2H₂O

[Given]   4 mol H₂O

[Solve]   x mol O₂

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

[RxN] 2 mol H₂O → 2 mol O₂

<u>Step 3: Stoichiometry</u>

  1. Set up conversion:                    \displaystyle 4 \ mol \ H_2O(\frac{2 \ mol \ O_2}{2 \ mol \ H_2O})
  2. Multiply/Divide:                          \displaystyle 4 \ mol \ O_2
7 0
3 years ago
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The data table below shows four different chemical reactions, the temperature change of each, and the duration of the change in
mestny [16]

Answer:

Reaction 4

Explanation:

exothermic reaction is reaction in which reaction takes place evolving heat

3 0
3 years ago
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18. Suggest an explanation for the observations that ethanol, C2H5OH, is completely miscible with water and that ethanethiol, C2
nydimaria [60]

Answer:

              Ethanol is completely miscible due to <u><em>presence</em></u> of Hydrogen bonding.

              Ethanethiol is partially miscible due to <u><em>absence</em></u> of Hydrogen Bonding.

Explanation:

                     The miscibility of liquids depend upon the intermolecular interactions between the two liquids. The stronger the intermolecular interactions the more miscible will be the liquids.

Among the two given examples, Ethanol is more miscible in water because it exhibits hydrogen bonding which is considered the strongest intermolecular interaction. Hydrogen bonding occurs when the hydrogen atom is bonded to more electronegative atoms like Fluorine, Oxygen and Nitrogen. In this way the hydrogen atom gets partial positive charge and the electronegative atom gets partial negative charge. Hence, these partial charges results in attracting the opposite charges on other surrounding atoms.

While, in case of Ethanethiol the hydrogen atom is not bonded to any high electronegative atom hence, there will be no hydrogen bonding and therefore, there will be less interactions between the neighbour atoms.

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4 years ago
you have accidentally broken a test tube and spilled a chemical on the bench. which of the following best describes what you sho
ANEK [815]

Tell the teacher, do NOT clean it up yourself.

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3 years ago
HELP!!!!!!!!! Match the term with the example that shows its definition.
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Compressibility - A

Flammability - B

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Reactivity - D

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