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3 years ago

What is conductivity?

Chemistry

2 answers:

DiKsa [7]3 years ago

6 0

Conductivity is a metal conduct heat and electricity well.

Delocalized electrons = easy electron movement.
Moving electrons carry current, thermal energy.
More valence electrons, larger atomic radius = higher conductivity.

Metals are malleable, ductile, and exhibit luster.

Delocalized electrons = easy to deform metal.
Easy electron movement = "flexible" bonds.
Metals = malleable and ductile instead of brittle.
Movement of electrons between bands = shiny, metallic luster.
Oscillation of electrons between bands emits light.

Hope this helps!

r-ruslan [8.4K]3 years ago

5 0

The degree to which a specified material conducts electricity, calculated as the ratio of the card density in the material to the electric field that causes the flow of current. It is the reciprocal of the resistivity.

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How many grams of glucose are needed to prepare 144.3 mL of a 1.4%(m/v) glucose solution?

Montano1993 [528]

Answer:

2.0202 grams

Explanation:

1.4% (m/v) glucose solution means: 1.4g glucose/100mL solution.

so ?g glucose = 144.3 mL soln

Now apply the conversion factor, and you have:

?g glucose = 144.3mL soln x (1.4g glucose/100mL soln).

so you have (144.3x1.4/100) g glucose= 2.0202 grams

6 0

3 years ago

Read 2 more answers

The anion of which element has a –1 charge?

vovangra [49]

An anion is a negatively charged ion. An element can become an anion if it takes an extra electron such that it has one more electron than protons.
Atoms would preferentially taken an extra electron so that it can have a full octet and be more stable.

$\sf Cl^-, Br^-, F^-$ are some of the few elements that would have a -1 charge.

6 0

2 years ago

The element gallium has an atomic weight of 69.7 and consists of two stable isotopes gallium -69 and gallium -71. The isotope ga

BigorU [14]

Answer:

The answer to your question is Gallium-71 = 70.9202 amu

Explanation:

Gallium atomic weight = 69.7

Gallium-69 = 68.9 amu abundance = 60.4%

Gallium-71 = x abundance = 39.6%

To solve this problem just write an equation and solve it for the mass of gallium-71.

Equation

Gallium = Gallium-69(abundance) + Gallium-71(abundance)

Substitution

69.7 = (68.9)(0.604) + Gallium-71(0.396)

69.7 = 41.6156 + Gallium-71(0.396)

Gallium-71(0.396) = 69.7 - 41.6156

Gallium-71(0.396) = 28.0844

Gallium-71 = 28.0844/0.396

Gallium-71 = 70.9202 amu

3 0

2 years ago

Perform each of the following unit conversions using the conversion factors given below:

andrezito [222]

1. 1086.04 mmHg

2.70.213 mmHg

3. 95.954 kPa

<h3>Further explanation</h3>

Pressure (P) is the force applied per unit area

Can be formulated :

$\tt P=\dfrac{F}{A}$

P = pressure (SI=Pascal(Pa))

F= force applied (N)

A=area(m²)

The unit of pressure can be expressed in atm, mmHg, or Pascal

$\tt 1.\dfrac{1.429}{1}\times 760=1086.04~mmHg$

$\tt 2)~9,361~Pa=9.361~kPa=\dfrac{9.361}{101.325}\times 760=70.213~mmHg$

$\tt 3)\dfrac{725}{760}\times 1=0.947~atm=\dfrac{0.947}{1}\times 101.325=95.954~kPa$

4 0

2 years ago

Read 2 more answers

Heavy elements, like uranium, were/are created _______________. a. in supernovae and star collisions b. all of the above c. in t

Ivenika [448]

Answer:

a. in supernovae and star collisions

Explanation:

The periodical table contains some heavier elements, which are formed as neutron stars pairs hit eachother and erupt cataclysmically.

The star emitts very large quantities of energy and neutrons during supernova, which allow for the production of heavier elements than iron, such as uranium and gold. All these elements are ejected into space during the supernova explosion.

3 0

2 years ago