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3 years ago

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Jasmine is a cook, and she wants to buy new equipment. She is presented with dishes made of copper, clay, plastic, and glass. Sh

e selects the copper pot because she does most of her cooking on the stove. Which explains why she most likely chose copper?

1 answer:

KATRIN_1 [288]3 years ago

8 0

The awnser is number four <span>Copper is conductive and will absorb heat to cook the food. </span>

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Calculate the root mean square (rms) average speed of the atoms in a sample of xenon gas at 0.15 atm and -55c

GrogVix [38]

Answer:
Vrms is 149.7266 m/sec

Explanation:
The root means square velocity of a gas can be calculated as follows:
Vrms = $\sqrt{ \frac{3RT}{M}}$
where:
R is the ideal gas constant = 8.3145
T is absolute temperature = -55 + 273 = 118 degrees kelvin
M is the molar mass of the gas = 131.293 grams = 0.131293 kg

Substituting with these givens in the above equation, we would find that the Vrms is 149.7266 m/sec

Hope this helps :)

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4 years ago

The amount of I₃⁻(aq) in a solution can be determined by titration with a solution containing a known concentration of S₂O₂⁻³(aq

puteri [66]

Answer: 0.22 M

Explanation:

$2S_2O_3^{2-}(aq)+I_3^-\rightarrow S_4O_6^{2-}(aq)+3I^-(aq)$

Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.

$Molarity=\frac{moles}{\text {Volume in L}}$

moles of $Na_2S_2O_3=Molarity\times {\text {Volume in L}}=0.440\times 0.025=0.011moles$

$Na_2S_2O_3\rightarrow 2Na^+S_2O_3^{2-}$

Thus moles of $S_2O_3^{2-}$ = 0.011

According to stoichiometry:

2 moles of $S_2O_3^{2-}(aq)$ require 1 mole of $I_3^$

Thus 0.011 moles of $S_2O_3^{2-}(aq)$ require= $\frac{1}{2}\times 0.011=5.5\times 10^{-3}$ moles of $I_3^-$

Thus Molarity of $I_3^-=\frac{5.5\times 10^{-3}}{0.025L}=0.22M$

Therefore, the molarity of $I_3^-$ in the solution is 0.22 M

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3 years ago

Which statement describes both homogeneous mixtures and heterogeneous mixtures?

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C. Their components can be separated by physical processes.

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3 years ago

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zimovet [89]

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3 years ago

Of the two type of bonds (pi and sigma), which is capable of rotation around that bond and which is not? Why?

Bess [88]

Answer:

The sigma bonds are capable of rotating, the pi bonds not.

Explanation:

Sigma bonds are the strongest type of bonds, there are related to the overlapping in the atomic orbitals, and they can rotate. In the pi bound (that is a double bond), there are electrons moving on the molecule and it is not permitted the rotation on this type of bonds. Of the sigma bonds are capable of rotating while the pi bonds not.

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3 years ago