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3 years ago

How would you distinguish a scientific theory from a scientific law?

Chemistry

1 answer:

Sphinxa [80]3 years ago

5 0

A theory is something that is yet to be proven and a law is proven and can be reproduced

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Delocalization which occurs through overlap between stigma and p orbitals

elixir [45]

Answer:

Single covalent bonds that form between nuclei are created from the "head-to-head" overlap of orbitals and are called stigma (s) bonds. ... Another type of bond, a pi (p) bond is formed when two p orbitals overlap. Pi bonds are found in double and triple bond structures

Explanation:

Delocalization happens when electric charge is spread over more than one atom. For example, bonding electrons may be distributed among several atoms that are bonded together.

7 0

3 years ago

Zinc blende, or sphalerite, can be described as having a face-centered cubic unit cell with sulfur atoms at each lattice point a

g100num [7]

Answer:

ZnS

Explanation:

1. Number of Zn atoms

4 internal atoms = 4 Zn atoms

2. Number of S atoms

8 corners × ⅛ S atom/corner + 6 faces × ½ S atom/face = 1 S atom + 3 S atoms = 4 S atoms

3. Empirical formula

The atomic ratio is

4Zn:4S = 1Zn:1S

The empirical formula is ZnS.

7 0

3 years ago

A box has a weight of 120 lbs and the bottom of the box is 12 in2 . What is the pressure the box exerts on the floor?

denis23 [38]

How can I help with this question?

7 0

3 years ago

A 52.9g sample of brass, which has a specific heat capacity of 0.375Â·JÂ·g^âˆ’1Â°C^âˆ’1, is put into a calorimeter (see sketch a

vaieri [72.5K]

Answer: 90.04°C

Explanation: Calorimeter is a device measures the amount of heat of a chemical or physical process. An ideal calorimeter is one that is well-insulated, i.e., prevent the transfer of heat between the calorimeter and its surroundings. So, the net heat change inside the calorimeter is zero:

$q_{1}+q_{2}=0$

Rearraging, it can be written as

$q_{1}=-q_{2}$

showing that the heat gained by Substance 1 is equal to the energy lost by Substance 2.

In our case, water is gaining heat, because its temperature has risen and so, brass is losing energy:

$q_{water}=-q_{brass}$

Calculating:

$m_{w}.c_{w}.\Delta T=-[m_{b}.c_{b}.\Delta T]$

$100.4.18.(18.4-15)=-[52.9.0.375.(18.4-T)]$

Note: final temperature is the same as the substances are in thermal equilibrium.

Solving:

418(3.4)= - 365.01 + 19.8375T

19.8375T = 1786.21

T = 90.04

The initial temperature for the sample of brass was 90.04°.

7 0

2 years ago

How do fossils fuels contribrute to air population?

SpyIntel [72]

According to the EPA... If someone burns fossil fuels, the reaction releases nitrogen oxides up and into the atmosphere. This contributes to the creation of smog (sometimes acid rain). The biggest sources of nitrogen oxide emissions are: vehicles, coal power plants, ships, airplanes, and large industrial operations.

7 0

3 years ago

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