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Doss [256]
3 years ago
9

What does the speed of the mixing colors tell you about the speed of the

Chemistry
1 answer:
belka [17]3 years ago
5 0
Since the colors moved faster in the hit water, it means that the water molecules in the hot water move faster than the molecules in the cold water.
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At which point does the roller coaster have very little kinetic energy and very little potential energy ?
Nana76 [90]
When it would be on a flat area with no slope. and no movement
6 0
4 years ago
Read 2 more answers
A gaseous mixture contains 441.0 Torr H2(g), 387.3 Torr N2(g), and 74.5 Torr Ar(g). Calculate the mole fraction, ????, of each o
Arte-miy333 [17]

Answer:

XH₂ = 0.4885

XN₂ = 0.4290

XAr = 0.0825

Explanation:

Step 1: Given data

  • Partial pressure of H₂ (pH₂): 441.0 Torr
  • Partial pressure of N₂ (pN₂): 387.3 Torr
  • Partial pressure of Ar (pAr): 74.5 Torr

Step 2: Calculate the total pressure (P)

The total pressure is equal to the sum of the partial pressures of all the gases.

P = pH₂ + pN₂ + pAr = 441.0 Torr + 387.3 Torr + 74.5 Torr = 902.8 Torr

Step 3: Calculate the mole fraction (X) of each gas

We will use the following expression.

Xi = pi / P

where,

Xi: mole fraction of the gas i

pi: partial pressure of the gas i

P: total pressure

XH₂ = pH₂ / P = 441.0 Torr / 902.8 Torr = 0.4885

XN₂ = pN₂ / P = 387.3 Torr / 902.8 Torr = 0.4290

XAr = pAr / P = 74.5 Torr / 902.8 Torr = 0.0825

6 0
3 years ago
Calculate the theoretical density (in g/cm3) of copper (Cu), given that it has the FCC structure. The atomic weight of Cu is 63.
sasho [114]

Answer:

8.937g/cm³

Explanation:

To answer this question we need to know that, in 1 unit FCC cell you have:

Edge length = √8 * R

<em>Volume = 8√8 * R³</em>

<em>And there are 4 atoms per unit cell</em>

<em />

<em>Mass of 4 atoms in g:</em>

4 atom * (1mol / 6.022x10²³atom) * (63.55g / mol) = 4.221x10⁻²²g

<em />

<em>Volume in cm³:</em>

0.1278nm * (1x10⁻⁷cm / 1nm) = 1.278x10⁻⁸cm

Volume = 8√8 * (1.278x10⁻⁸cm)³

Volume = 4.723x10⁻²³cm³

And density is:

4.221x10⁻²²g / 4.723x10⁻²³cm³ =

<h3>8.937g/cm³</h3>

6 0
4 years ago
What is the process in which coal is heated in the absence of air? Name the process.
olya-2409 [2.1K]

Answer:

The process of heating coal in the absence of air is called the destructive distillation of coal. ... When coal is heated in the absence of air, a number of products are obtained. 0.0.

Explanation:

5 0
4 years ago
The number of atoms in 2.0 moles of NaOH is _____ of 1.0 mole of H2O.
Irina-Kira [14]

Answer:

The answer is the same as .

Explanation:

There are 3 atoms in NaOH, 1 sodium, 1 oxygen and 1 hydrogen.

There are 3 atoms in H2O, 2 hydrogen and 1 oxygen.

3 0
4 years ago
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