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3 years ago

14

A Nuclear reactor produces product 20kg of uranium-235.if the half life is about 70years , how long will it take to decay to 0.1

kg

1 answer:

VikaD [51]3 years ago

8 0

Answer:

t=(70)ln(19.9/20)/-ln2

70 is the years. 19.9 kg is what is left after 0.1kg decay. 20kg is your initial amount.

t=0.506 years with a decay constant of 0.0099021/year

Explanation:

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Due to apparent brightness, on which planets of the ones listed below would I have to be standing on to observe the smallest app

Burka [1]

Answer:

Neptune to be precise

Explanation:

cause it is the last planet in our solar system

8 0

3 years ago

The metabolic oxidation of glucose, C6H12O6, in our bodies produces CO2, which is expelled from our lungs as a gas.

enot [183]

Answer:

$\large \boxed{\text{21.6 L}}$

Explanation:

We must do the conversions

mass of C₆H₁₂O₆ ⟶ moles of C₆H₁₂O₆ ⟶ moles of CO₂ ⟶ volume of CO₂

We will need a chemical equation with masses and molar masses, so, let's gather all the information in one place.

Mᵣ: 180.16

C₆H₁₂O₆ + 6O₂ ⟶ 6CO₂ + 6H₂O

m/g: 24.5

(a) Moles of C₆H₁₂O₆

$\text{Moles of C$_{6}$H$_{12}$O}_{6} = \text{24.5 g C$_{6}$H$_{12}$O}_{6}\times \dfrac{\text{1 mol C$_{6}$H$_{12}$O}_{6}}{\text{180.16 g C$_{6}$H$_{12}$O}_{6}}\\\\= \text{0.1360 mol C$_{6}$H$_{12}$O}_{6}$

(b) Moles of CO₂

$\text{Moles of CO}_{2} =\text{0.1360 mol C$_{6}$H$_{12}$O}_{6} \times \dfrac{\text{6 mol CO}_{2}}{\text{1 mol C$_{6}$H$_{12}$O}_{6}} = \text{0.8159 mol CO}_{2}$

(c) Volume of CO₂

We can use the Ideal Gas Law.

pV = nRT

Data:

p = 0.960 atm

n = 0.8159 mol

T = 37 °C

(i) Convert the temperature to kelvins

T = (37 + 273.15) K= 310.15 K

(ii) Calculate the volume

$\begin{array}{rcl}pV &=& nRT\\\text{0.960 atm} \times V & = & \text{0.8159 mol} \times \text{0.082 06 L}\cdot\text{atm}\cdot\text{K}^{-1}\text{mol}^{-1} \times \text{310.15 K}\\0.960V & = & \text{20.77 L}\\V & = & \textbf{21.6 L} \\\end{array}\\\text{The volume of carbon dioxide is $\large \boxed{\textbf{21.6 L}}$}$

7 0

3 years ago

which of the following actions can result in decreasing the pressure of a gas inside a sealed container: increasing the collisio

nekit [7.7K]

Decreasing the speed at which particles move.
That is the answer because less speed involves less energy to move each particle which translates to less energy being exerted on the container when the particle and the container collide. That would result in less pressure.

4 0

3 years ago

A mixture of N2, O2 and He have mole fractions of 0.25, 0.65, and 0.10, respectively. What is the pressure of N2 if the total pr

VladimirAG [237]

Answer:

Partia pressure N₂ → 0.975 atm

Explanation:

Let's analyse the moles fractions:

N₂ → 0.25

O₂ → 0.65

He → 0.1

Partial pressure / Total pressure = Mole fraction

Partial pressure N₂ / 3.9 atm = Mole fraction N₂

Partial pressure N₂ / 3.9 atm = 0.25

Partial pressure N₂ = 3.9 atm . 0.25 → 0.975 atm

5 0

3 years ago

What type of reaction is NaCl to Na + Cl2

podryga [215]

Info: NACl2<span> might be an improperly capitalized: </span>NaCl2<span>. Balanced equation: NA + Cl2 = </span>NACl<span>2. </span>Reaction type<span>: synthesis. Please tell about this free chemistry ...</span>

3 0

3 years ago