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Stells [14]
3 years ago
10

Oxygen is a non-mental?TrueFalse

Chemistry
2 answers:
valentinak56 [21]3 years ago
8 0
True, they are non-metal

And it's metal, not mental XD
Over [174]3 years ago
7 0
They are non mental
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[15 Points, Stoichiometry and Gases]
KiRa [710]

The reaction is

CaC₂(s) + 2H₂O (l) -----> Ca(OH)₂ (s) + C₂H₂ (g) ​

As we have data of gas ethyne (or acetylene), C₂H₂

We can calculate the moles of acetylene and from this we can estimate the mass of calcium carbide taken

the moles of acetylene will be calculated using ideal gas equation

PV =nRT

R = gas constant = 0.0821 Latm/molK

T = 385 K

V = volume = 550 L

P = Pressure = 1.25 atm

n = moles = ?

n = PV /RT = 1.25 X 550 / 0.0821 X 385 = 21.75 mol

As per balanced equation these moles of acetylene will be obtained from same moles of calcium carbide

moles of calcium carbide = 21.75mol

molar mass of CaC₂ = 40 + 24 = 64

mass of CaC₂ = moles X molar mass = 21.75 X 64 = 1392g

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5 A Punnett square is shown below. The domin
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The answer is 25 percent
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Use the solubility graph to answer the following questions.
Akimi4 [234]

The required amount of KClO₃ to prepare a saturated solution is 48 grams.

<h3>What is solubility?</h3>

The ability of a material, the solute, to create a solution with another substance, the solvent, is known as solubility.

Given graph is plotted between the temperature and solubility of the substance at 100g of water, so for the given points calculation will be:

  • According to the graph for the KClO₃ we require almost 48g of KClO₃ to prepare a saturated solution.
  • From the graph it is clear that at 40°C 40g of KCl will dissolve in 100g of water then amount of KCl which will dissolve in 68g of water will be calculated as:

x = (40)(68) / (100) = 27.2g

  • On the basis of the graph, if 75 grams of calcium chloride is added to 100 g of water at 25°C then the obtained solution is the unsaturated as they have les solute then the limit.
  • Based on the graph cerium sulfate behaves like a precipitate which will not dissolve at any temperature and present in the physical state.
  • We can add more 30g to make the KCl solution saturated.

Hence, we require almost 48g of KClO₃ to prepare a saturated solution of KClO₃.

To know more about solubility, visit the below link:

brainly.com/question/16903071

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