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Black_prince [1.1K]
3 years ago
7

The phase change in which a substance changes from a gas directly to a solid is

Chemistry
1 answer:
maxonik [38]3 years ago
7 0
1. would be deposition
2.sublimation
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CH4 + 202 → CO2 + 2H2O<br> How many grams of O2 produced from 2 moles of H20?
Snezhnost [94]
<h3>Answer:</h3>

60 g 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]   2 mol H₂O

[Solve]   x g O₂

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

[RxN] 2 mol H₂O → 2 mol O₂

[PT] Molar Mass of O - 16.00 g/mol

Molar Mass of O₂ - 2(16.00) = 32.00 g/mol

<u>Step 3: Stoichiometry</u>

  1. Set up conversion:                    \displaystyle 2 \ mol \ H_2O(\frac{2 \ mol \ O_2}{2 \ mol \ H_2O})(\frac{32.00 \ g \ O_2}{1 \ mol \ O_2})
  2. Divide/Multiply:                          \displaystyle 64.00 \ g \ O_2

<u>Step 4: Check</u>

<em>Follow sig fig rules and round. We are given 1 sig fig.</em>

64.00 g O₂ ≈ 60 g O₂

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3 years ago
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What are four main types of fresh water ecosystems
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Answer:

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ocean gulf of Mexico

hope it helped

8 0
3 years ago
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Gold can be found in native or pure state in nature why? Write any one anyone application of sulphur​
Gala2k [10]

Answer:

Sulphur is used in making car batteries and fertlizers

8 0
2 years ago
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Determine the mass of hydrogen chloride needed to react completely with 12.8 g of aluminum to produce aluminum chloride and hydr
Hoochie [10]
First write out the eqn, and balance it.

next, take 12.8g/mr of aluminium
this will give u the mols of aluminium

next, take the ratio of HCL and Al, compare and find the mols of HCL.

take the mols of HCL/mr of HCL to give u mass

doneee
5 0
3 years ago
When a gas in a cylinder is compressed at constant temperature by a piston, the pressure of the gas increases. Consider the foll
Marizza181 [45]

Answer:

Answer below!!

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The volume of a gas is inversely proportional to presure keeping the temperature the same.

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4 0
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