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julsineya [31]
3 years ago
6

If 9.2 femptosections is equal to 9.2 ×10^-15 seconds what is the exponential equivalent of fempto?

Chemistry
1 answer:
Vladimir79 [104]3 years ago
5 0

Answer:

1 fempto = 10⁻¹⁵

Explanation:

Data Given:

9.2 fempto second = 9.2 ×10 ⁻¹⁵ seconds

exponential equivalent of fempto = ?

Solution:

To find exponential equivalent of fempto

As we know

we look at the given data

That is fempto seconds = 9.2

when we write only seconds then we write 10⁻¹⁵ instead of fempto

that is

9.2 ×10 ⁻¹⁵ seconds

So the exponential equivalent of fempto = 10 ⁻¹⁵

That is -15 exponent to 10

So,

10 ⁻¹⁵ = 0.00000000000001

1 fempto = 10 ⁻¹⁵

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A balloon filled with helium occupies 20.0 l at 1.50 atm and 25.0◦c. How many moles of helium will there be in the balloon at st
satela [25.4K]

Answer:

  • There will be 1.23 moles of helium in the balloon at STP

Explanation:

1) <u>Initial conditions of the helium gas</u>:

  • V = 20.0 liter
  • p = 1.50 atm
  • T = 25.0 °C = 25.0 + 273.15 K = 298.15 K

2) <u>Ideal gas equation</u>:

  • pV = n RT
  • p, V, and T are given above
  • R is the Universal constant = 0.0821 atm-liter / ( K - mol)
  • n is the unknown number of moles

3) <u>Solve for n</u>:

  • n = pV / (RT) =
  • n = 1.50 atm × 20.0 liter / (0.0821 atm-liter /k -mol ×298.15K)
  • n = 1.23 mol

4) <u>At STP:</u>

  • STP stands for standard pressure and temperature.
  • The amount (number of moles) of the gas will not change because the change of pressure and temperature, so the number of moles reamain the same: 1.23 mol.
8 0
3 years ago
Question 5 of 5
grandymaker [24]

Answer:

B.

Explanation:

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3 years ago
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Answer:

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4 0
2 years ago
If you have 10 grams of Lithium Oxide what will the volume be? Show your work
gogolik [260]

Answer:

Volume occupied by 10 grams of Lithium Oxide at STP is 7.52 L

Explanation:

STP (Standard Temperature and Pressure) : It is used while performing calculation on gases and provide standards of measurements while performing experiment.

According to IUPAC (International Union of Pure And applied Chemistry) , standard temperature is 273.15 K and Pressure is 100 kPa (0.9869 atm). At STP condition 1 mole of substance occupies 22.4 L volume .

Molar mass of Lithium Oxide = 29.8 g/mol

Li_{2}O = 2(6.9) + 15.99 = 29.8

Mass of 1 mole Li_{2}O = 29.8 g

1 mole Li_{2}O occupies, Volume = 22.4 L

29.8 g Li_{2}O occupies, V = 22.4 L

1 g Li_{2}O occupies ,V = \frac{22.4}{29.8}

1 g Li_{2}O occupies ,V = 0.7516 L

10 g tex]Li_{2}O[/tex] occupies ,V = 0.7516 \times10 L

V = 7.52 L

So, volume occupied by Lithium Oxide At STP is 7.52 L

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3 years ago
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