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1 year ago

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Pressure is defined as _______.1

1 answer:

Yakvenalex [24]1 year ago

7 0

Answer:the perpendicular force per unit area

pressure, in the physical sciences, the perpendicular force per unit area, or the stress at a point within a confined fluid.

Explanation:

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Photochemical chlorination of 1,2−dibromoethane gives a mixture of two stereoisomers of c2h3br2cl. draw the structure of one of

dem82 [27]

<em>See the structure at the bottom-left corner of the sketch attached.</em>

<h3>Explanation</h3>

Replacing an H atom with a Cl atom in a 1,2-dibromoethane molecule produces a molecule of C₂H₃Br₂Cl. Its structural formula is show in the top-left corner of the sketch attached.

The molecule contains no double or triple bonds. It has no E/Z isomers. The two stereoisomers can only be enantiomers. A red asterisk * is placed next to the only <em>chiral</em> carbon in this molecule.

That carbon atom is connected to

one H atom,
one Cl atom,
one Br atom, and
the alkyl group CH₂Br.

The two isomers are <em>mirror images </em>about this carbon atom. Indicate how the four groups are arranged in space using the wedge and dash notation.

Solid lines refer to chemical bonds in the plane of the paper.
Wedges refer to bonds pointing out of the page towards you.
Dashes refer to bonds pointing into the page away from you.

The last row of this sketch shows the structure of both isomers. The question is asking for only one. Showing either of them should work.

4 0

2 years ago

How does the quantum theory of atoms explain the nature of the emission-line spectrum of hydrogen?

Oliga [24]

Answer:

Niels Bohr The electron in a Hydrogen atoms can only circle the nucleus in certain paths or orbits.

4 0

2 years ago

● Human blood has a hydrogen ion concentration is 10-7.4 mol/L. What is the pH of the blood?

Bogdan [553]

Explanation:

PH=14-POH

=14-2.6

=11.4

5 0

2 years ago

Read 2 more answers

Question 1(Multiple Choice Worth 3 points)

GarryVolchara [31]

Answer:

mass molar of gas (Mw):

Mw = 107 g/mol

Explanation:

∴ m gas = 3.82 g

∴ V gas = 0.854 L

∴ T = 302 K

∴ P = 1.04 atm

ideal gas:

PV = RTn

∴ n = m / Mw

⇒ PV = RTm/Mw

⇒ Mw = RTm / PV

⇒ Mw = ((0.082 atm.L/K.mol)*(302 K)*(3.82 g)) / ((1.04 atm)*(0.854 L)

⇒ Mw = 106.51 g/mol ≅ 107 g/mol

8 0

2 years ago

A new gel is being developed to use inside padding and helmets to cushion the body from impacts. The gel is stored in a 4.24.2 c

alexira [117]

Answer:

The specific gravity of the gel is 1470.68

Explanation:

Given:

Volume $V = 4.24$ $m^{3}$

Diameter of tank $d = 2$ m

Pressure at surface $P _{o} = 1.41$ atm

Height $h = 6565$ ft $= \frac{6565}{3.281} = 2001$ m

Pressure at bottom is given by,

$P_{bottom} = \rho _{w} g h$

Where $\rho _{w} = 1000 \frac{kg}{m^{3} }$ , $g = 9.8\frac{m}{s^{2} }$

$P_{bottom} = 1000 \times 9.8 \times 2001$

$P_{bottom} = 19.6 \times 10^{6}$ $\frac{N}{m^{2} }$

Here volume is 4.24 $m^{3}$

$\pi r^{2} h = 4.24$

$h = \frac{4.24}{3.14} = 1.35$ m

From pascal equation,

$P_{bottom} = P_{o} + \rho _{gel} g h$

Find density of gel from above equation,

$19600000 = 142865.25 + \rho_{gel} \times 9.8 \times 1.35$

$\rho_{gel} = 1470682.89$ $\frac{kg}{m^{3} }$

So specific gravity is given by,

ζ = $\frac{\rho _{gel} }{\rho_{w} }$

ζ = $\frac{1470682.89}{1000}$

ζ = $1470.68$

Therefore, the specific gravity of the gel is 1470.68

5 0

3 years ago