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Alisiya [41]
3 years ago
6

What type of element would form an ionic bond with iodine?

Chemistry
1 answer:
Lemur [1.5K]3 years ago
8 0
Potassium iodide but basically metal
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The number of moles in 250 L of He gas at STP is ________ mol, Round to a whole number,
7nadin3 [17]

Answer: The number of moles in 250.0 L of He at STP is 11.0 mole.

Explanation:

  • It is known that 1.0 mole of a gas at STP conditions will occupy 22.7 L.
  • To show this information: STP means that T = 0.0 °C = 273.15 K and P = 1.0 kPa =  (100/101.325) = 0.9869 atm.
  • From the ideal gas law: PV = nRT.
  • Where, P is the pressure in atm <em>(P = 1.0 atm at STP).</em>
  • V is the volume in L.
  • n is the number of moles (n = 1.0 mole).
  • R is the general gas constant (R = 0.0821 L.atm/mol.K).
  • T is the temperature in K (T = 273.15 K at STP).
  • and now we can get the volume of 1.0 mole at STP: V = nRT/P
  • V = (1.0 mole x 0.0821 L.atm/mol.K x 273.15 K) / (0.9869 atm) = 22.7 L.
  • Now, we can get the number of moles of 250.0 L of He at STP:

<em>Using cross multiplication:</em>

1.0 mole → 22.7 L

??? mole → 250.0 L

  • The number of moles in 250.0 L of He at STP = (250.0 L x 1.0 mole) / (22.7 L) = 11.01 mole ≅ 11.0 mole.
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3 years ago
What is a orgasm that kills and eats other orgasms for food called?
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The answer is predator
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Compound C with molar mass 205gmol-1 , contains 3.758g of carbon , 0.316g of hydrogen and 1.251g of oxygen. Determine the molecu
labwork [276]

Answer:

Molecular formula => C₁₂H₁₂O₃

Explanation:

From the question given above, the following data were obtained:

Molar mass of compound = 205gmol¯¹

Mass of Carbon (C) = 3.758 g

Mass of Hydrogen (H) = 0.316 g

Mass of Oxygen (O) = 1.251 g

Molecular formula =?

We'll begin by determining the empirical formula of the compound. This can be obtained as follow:

C = 3.758 g

H = 0.316 g

O = 1.251 g

Divide by their molar masses

C = 3.758 /12 = 0.313

H = 0.316 /1 = 0.316

O = 1.251 /16 = 0.078

Divide by the smallest.

C = 0.313 / 0.078 = 4

H = 0.316 / 0.078 = 4

O = 0.078 / 0.078 = 1

Thus, the empirical formula of the compound is C₄H₄O

Finally, we shall determine the molecular formula of the compound. This can be obtained as follow:

Molar mass of compound = 205gmol¯¹

Empirical formula => C₄H₄O

Molecular formula =>?

[C₄H₄O]ₙ = 205

[(12×4) + (4×1) +16]n = 205

[48 + 4 +16]n = 205

68n = 205

Divide both side by n

n = 205 / 68

n = 3

Molecular formula => [C₄H₄O]ₙ

Molecular formula => [C₄H₄O]₃

Molecular formula => C₁₂H₁₂O₃

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2 years ago
A mixture of nitrogen gas and oxygen gas has a total pressure of l.13 atm. If the partial pressure of oxygen is 0.43 atm, what i
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C
0.70

I hope this is help, I’m so so sorry if I’m incorrect
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3 years ago
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Which of the following lists the characteristics that all matter has?
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It has mass and takes up space is correct. 
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3 years ago
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