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2 years ago

Complete the conceptap below . About Chemical Bonds

Chemistry

1 answer:

Irina18 [472]2 years ago

5 0

Answer:

1. ionic bonds

2. metallic bonds

3. share

4. metal

5. non-metal

6. metals

7. NaCl ( sodium chloride )

8. CO2 ( carbon dioxide )

9. Cu ( copper )

i hope it helped......

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In an experiment, having too many variables

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3 years ago

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What do the water cycle and wind have in common

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The water cycle deals with wind. The wind uses up energy as well as the water cycle.

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3 years ago

Photovoltaic cells convert solar energy into electricity. Calculate the wavelength of light (in nm) required for mercury (Φ =7.2

Sholpan [36]

Answer:

275.3 nm is the wavelength of light required for mercury.

Mercury can not be used to generate electricity from the sun because wavelength at which mercury will emit an electron is smaller than 500 nm.

Explanation:

The wavelength of light required for mercury to emit an electron.

The wavelength of the radiation = $\lambda$

Energy required fro mercury to to emit an electron = E

Energy required fro mercury to to emit an electron will the energy if the radiation = E' = $7.22\times 10^{-19} J$

E' = E

To calculate the wavelength of light, we use the equation:

$E=\frac{hc}{\lambda }$

where,

$\lambda$ = wavelength of the light

h = Planck's constant = $6.626\times 10^{-34} Js$

c = speed of light = $3\times 10^8m/s$

$\lambda =\frac{hc}{E}$

$=\frac{6.626\times 10^{-34} Js\times 3\times 10^8m/s}{7.22\times 10^{-19} J}$

$\lambda =2.753\times 10^{-7} m=2.753\times 10^{-7}\times 10^ nm =275.3 nm$

Wavelength of the sun light in the visible region = 500 nm

500 nm > 275.3 nm

$E\propto \frac{1}{\lambda }$

Less energy < more energy

So, this means that mercury can not be used to generate electricity from the sun.

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3 years ago

People tend to speak more quietly in restaurants than they do when they are having an ordinary conversation Restaurant conversat

MArishka [77]

Answer:

A loud ordinary conversation following the supplied information in the question is about 4500 dB. But, in the official decibel system measure a loud conversation does not overcome 100 dB.

Explanation:

Using the supplied data of the exercise, we say that in a restaurant conversation the value is 45 dB. If we multiply this by 100 we will have a value for a laud ordinary conversation.

45×100 = 4500 dB.

but as I mentioned in the answer, in the official decibel system measure a loud conversation between 2 man reaches a maximal of 100 dB.

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3 years ago

What kind of chemical bond is found between paired bases of the dna double helix?

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Hydrogen. Covalent bonds occur within each linear strand and strongly bond the bases, sugars, and phosphate groups (both within each component and between components). Hydrogen bonds occur between the two strands and involve a base from one strand with a base from the second in complementary pairing.

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3 years ago

Complete the conceptap below . About Chemical Bonds ​

Complete the conceptap below . About Chemical Bonds