What is the balanced chemical equation for caffeine?

How many excess electrons must be added to an isolated spherical conductor 41.0 cmcm in diameter to produce an electric field of

alina1380 [7]

Answer:

3.65 x 10¹⁰ electrons

Explanation:

we'll apply the following equation for electric field of a point charge on a spherical conductor

$E = k \frac{q}{r^{2} }$

where E is the electric field

k is a constant of the value 8.99 x 10⁹ Nm²/C²

r is the radius of the spherical conductor

q is the total charge in the sphere

Given diameter d =41.0cm, radius r = 20.5cm = 0.205m (convert cm to m)

Electrical field E = 1250 N/C

we are asked to determine how many excess electrons must be added to the surface of the sphere to produce this electric field

$E = k \frac{q}{r^{2} }$

q = E x r²

k

q = 1250 N/C x 0.205m²

8.99 x 10⁹ Nm²/C²

q = 5.84 x 10⁻⁹ C

this is the total charge in the sphere

To determine the number of electrons, we can divide the charge q by the charge on an electron e (1.6 x 10⁻¹⁹C)

$n = \frac{q}{e}$

n = 5.84 x 10⁻⁹ C

1.6 x 10⁻¹⁹C

n = 3.65 x 10¹⁰ electrons

Therefore, to apply an electric field of magnitude 1250 N/C, the isolated spherical conductor must contain 3.65 x 10¹⁰ electrons

3 0

3 years ago

Which soil layer contains the most

sattari [20]

Soil is usually layered. The uppermost layer is called topsoil and this layer contains the most humus, plant roots, and living creatures. The middle layer is called subsoil.

4 0

3 years ago

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In a solid metal sample how are valence electrons distributed

dsp73

Answer:

The valence electrons in a solid metal sample are delocalized or evenly distributed throughout the metal structure.

Explanation:

The atoms of a metal in a metal sample are held together in crystal lattice structures by means of metallic bonds. The valence electrons of each atom in a metal are not held to that atom alone but are contributed to an electron cloud surrounding the atoms. Each atom becomes positively charged and are located at the center of crystal lattice while the electrons surround the positively charged nucleus of the atoms. Thus, the atomic nucleus of each are held together by the moving electron cloud and overlapping residual electron orbits.

This model of metallic crystal structure is known as the electron-sea model of bonding in metals. This model of metallic structure accounts for some properties of metals such as high electrical and thermal conductivity as well as ease with which metals are deformed. Since the electrons are not tightly-bound to any single atom but are free to move about, hence, metals are very good conductors of electricity. Similarly, collisions between metal ions transfer energy to neighboring ions and are responsible for their high thermal conductivity. Also, metals are easily deformed because the metal ions can easily change position without having to break any specific bonds.

5 0

2 years ago

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A mixture of two gases with a total pressure of 2.12 atm contains 0.70 atm of Gas A. What is the partial pressure of Gas B?

11Alexandr11 [23.1K]

Answer:

1.42

Explanation: Because 2.12-0.70 equals 1.42

6 0

2 years ago

Monday

Leno4ka [110]