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An air bubble has a volume of 22.98 L at 3.3°C. What is the final volume, in L, of the gas when the temperature changes to 89.7*

daser333 [38]

Answer:

I don't know the answer of this question but thanks for the points.

8 0

3 years ago

How many electrons are being shared between the Atoms in this molecule?

Zigmanuir [339]

The answer is 4! Hope this Helps

5 0

3 years ago

In modeling solid-state structures, atoms and ions are most often modeled as spheres. A structure built using spheres will have

Sav [38]

There are 2 atoms in each unit cell. The volume of 1 unit cell is 30.4 Å³. The volume of each atom is 10.3 Å³. The volume of atoms in the cell is 20.6 Å³. The packing efficiency of the solid is 67.8 %.

(a) How many total atoms are there in each unit cell?

In body centered cubic cells, there are 2 atoms, 1 in the center and 1 resulting from the sum of the 1/8 atom of each of the 8 corners.

$N = 1 + 1/8 \times 8 = 2$

(b) What is the volume of one unit cell in Å³?

Since the cell is a cube with a side of 3.12 Å (s), we can calculate its volume (V) using the following expression.

$V = s^{3} = 3.12^{3} = 30.4 A^{3}$

(c) Assuming that the atoms are spheres and the radius (r) of each sphere is 1.35 Å, what is the volume of one atom in Å³?

We will use the following expression for the volume of the sphere.

$V = \frac{4}{3} \times \pi \times r^{3} = \frac{4}{3} \times \pi \times (1.35A)^{3}=10.3 A^{3}$

(d) Therefore, what volume of atoms are in one unit cell?

There are 2 atoms in the unit cell, each one with a volume of 10.3 Å³.

$2 \pi 10.3 A^{3} = 20.6 A^{3}$

(e) Based on your results from parts (b) and (d), what is the packing efficiency of the solid expressed as a percentage?

The volume of 1 unit cell is 30.4 Å³ and the volume occupied by atoms in the cell is 20.6 Å³. The packing efficiency of the solid is:

$E = \frac{20.6A^{3} }{30.4A^{3}} \times 100\% = 67.8\%$

There are 2 atoms in each unit cell. The volume of 1 unit cell is 30.4 Å³. The volume of each atom is 10.3 Å³. The volume of atoms in the cell is 20.6 Å³. The packing efficiency of the solid is 67.8 %.

Learn more: brainly.com/question/3037904

4 0

3 years ago

Aqueous hydrobromic acid HBr will react with solid sodium hydroxide NaOH to produce aqueous sodium bromide NaBr and liquid water

Studentka2010 [4]

Answer:

6.2g of NaBr are produced

Explanation:

The reaction of HBr with NaOH occurs as follows:

HBr + NaOH → NaBr + H2O

Where 1 mole of each reactant produce 1 mole of NaBr

To solve this question we need to find the moles of each reactant using their molar mass. With moles we can find limiting reactant and the moles (And mass) of NaBr produced, as follows:

Moles HBr -Molar mass: 80.9119g/mol)-

4.9g * (1mol/80.9119g) = 0.0606 moles HBr

Moles NaOH -Molar mass: 40g/mol-

3.86g * (1mol/40g) = 0.0965 moles NaOH

As the reaction is 1:1 and the moles of HBr < Moles NaOH, the limiting reactant is HBr and moles of NaBr produced are 0.0606 moles.

The mass of NaBr (Molar mass: 102.894g/mol) is:

0.0606 moles * (102.894g/mol) =

<h3>6.2g of NaBr are produced</h3>

5 0

3 years ago

What type of symbolic relationship do a bat and cow have ?

kaheart [24]

symbioticparasitism relationship

5 0

4 years ago