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3 years ago

What negative impact did chemistry have on society through the production and use of chlorofluorocarbons (cfcs)?

2 answers:

7 0

The negative impact of chemistry have on society through the production and use of chlorofluorocarbons (CFCs) is that lower levels of ozone allowed more ultraviolet radiation to reach Earth. CFC is an organic compound which is used refrigerants, propellants and solvents.

stira [4]3 years ago

5 0

Answer:

The CFCs leads to lower levels of ozone in the stratosphere, which had permitted more ultraviolet radiation to reach the surface of the Earth.

Explanation:

The CFCs or chlorofluorocarbons refers to an array of compounds that comprise the elements fluorine, chlorine, and carbon. The CFCs does not have any direct influence on the environment in the instantaneous vicinity of their discharge. However, on a global scale, the discharging of CFCs exhibits some serious environmental outcomes.

Their presence in the atmosphere signifies that some reach to the stratosphere and destroy the layer of ozone, thus minimizing the safeguarding it provides the Earth from the harmful UV rays of the Sun. It also contributes to Global Warming.

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A 0.1375-g sample of solid magnesium is burned in a constant-volume bomb calorimeter that has a heat capacity of 3024 J/°C. The

Anna35 [415]

Answer:

-24.76 kJ/g; -601.8 kJ/mol

Explanation:

There are two heat flows in this experiment.

Heat from reaction + heat absorbed by calorimeter = 0

q1 + q2 = 0

mΔH + CΔT = 0

Data:

m = 0.1375 g

C = 3024 J/°C

ΔT = 1.126 °C

Calculations:

0.1375ΔH + 3024 × 1.126 = 0

0.1375ΔH + 3405 = 0

0.1375ΔH = -3405

ΔH = -24 760 J/g = -24.76 kJ/g

ΔH = -24.76 kJ/g ×24.30 g/mol = -601.8 kJ/mol

3 0

3 years ago

In general, the ________ of a simple machine is the ratio of the distance over which the force is applied to the distance over w

madreJ [45]

The answer that best fits the blank provided above is MECHANICAL.

7 0

3 years ago

Determine the molecular formula for the compound with a molar mass of 46.08 g/mol and the following percent compostion:

kramer

Answer:

$\large\boxed{\large\boxed{CH_6N_2}}$

Explanation:

1. First determine the empirical formula.

a) Base: 100 g of compound

mass atomic mass number of moles

g g/mol mol

C 26.06 12.011 26.06/12.011 = 2.17

H 13.13 1.008 13.13/1.008 = 13.03

N 60.81 14.007 60.81/14.007 = 4.34

b) Divide every number of moles by the smallest number: 2.17

mass number of moles proportion

C 2.17/2.17 1

H 13.03/2.17 6

N 4.34/2.17 2

c) Empirical formula

$CH_6N_2$

d) Mass of the empirical formula

$1\times 12.011g/mol6+6\times 1.008g/mol+2\times 14.007g/mol=46.07g/mol$

2. Molecular formula

Since the mass of one unit of the empirical formula is equal to the molar mass of the compound, the molecular formula is the same as the empirical formula:

$CH_6N_2$

6 0

3 years ago

Calculate the volume of a cube with links to 2.2 in.

vlada-n [284]

Answer:

10.65

Explanation:

3 0

3 years ago

What is significant about the temperature absolute zero?

Reptile [31]

Explanation:

The absolute temperature is the lowest possible temperature in the universe. At this temperature, all atoms become motionless and cease to move.

The value of the absolute zero is pegged at -273.16°C.

It is the lowest limit of the coldness of a body.
Nothing can be colder than a body at absolute temperature.
Many researches are underway to take advantage of this temperature value for scientific purpose.
Thermodynamically, all process stops at this temperature.
When a body is brought close a body at absolute zero, it can suffer cryogenic burn due to heat transfer.

4 0

3 years ago