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2 years ago

NEED HELP NOW which materials allow heat to pass through them easily?

2 answers:

4 0

The materials which allow heat to pass through them easily are conductors of heat. For examples,aluminum, iron, and copper.

Hope this helps! ;)

coldgirl [10]2 years ago

3 0

The materials which allow heat to pass through them easily are. conductors of heat. For examples,aluminum, iron and copper.

Hope this helps! :)

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What is the total number of outer (valence) electrons in carbon dioxide, co2? answer?

Anuta_ua [19.1K]

Carbon dioxide has a total of 16 valence electrons.

1. To determine the number of valence electrons of carbon dioxide (CO2), first determine the number of valence electrons of each of the elements in the molecule.

a. We have 1 carbon (C) molecule, and 2 oxygen (O) molecules.

b. The carbon molecule has 4 valence electrons and each oxygen molecule has 6 oxygen molecules.

2. Add up the valence electrons of each of the elements

4 + (2 x 6) = 16
(from C) (2 oxygen molecules, with 6 valence electrons each)

Thus, CO2 has a total of 16 valence electrons.

The number of valence electrons can be more clearly seen from the Lewis structure of the CO2 in the figure below (Source: http://chemistry.tutorvista.com/inorganic-chemistry/bonding-electrons.html). The the dots surrounding the letters represent the valence electrons.

8 0

2 years ago

Generally, which of the three families of elements (metals, nonmetals, or inert gases) has the least tendency to form ionic bond

Sergio [31]

Answer:

Inert gases

Explanation:

Inert elements have a stable electron configuration meaning their shells/orbitals are full with their requisite number of electrons. Therefore, gaining or losing an electron would take high ionization energy. Therefore they are less likely to be involved in chemical reaction unless a high amount of energy is used. An example of an inert gas is Helium.

6 0

2 years ago

Model B: In this model the atom is a solid sphere that cannot be divided up into smaller

vivado [14]

Answer:

They are called corpuscles

Explanation:

5 0

2 years ago

One gram of liquid benzene is burned in a bomb calorimeter. The temperature before ignition was 20.826 C, and the temperature af

Licemer1 [7]

Answer:

fH = - 3,255.7 kJ/mol

Explanation:

Because the bomb calorimeter is adiabatic (q =0), there'is no heat inside or outside it, so the heat flow from the combustion plus the heat flow of the system (bomb, water, and the contents) must be 0.

Qsystem + Qcombustion = 0

Qsystem = heat capacity*ΔT

10000*(25.000 - 20.826) + Qc = 0

Qcombustion = - 41,740 J = - 41.74 kJ

So, the enthaply of formation of benzene (fH) at 298.15 K (25.000 ºC) is the heat of the combustion, divided by the number of moles of it. The molar mass od benzene is: 6x12 g/mol of C + 6x1 g/mol of H = 78 g/mol, and:

n = mass/molar mass = 1/ 78

n = 0.01282 mol

fH = -41.74/0.01282

fH = - 3,255.7 kJ/mol

4 0

3 years ago

What is the primary pigment found in the chlotopast

Lady_Fox [76]

Answer: Chlorophyll is a green photosynthetic pigment found in plants, algae, and cyanobacteria.

Chlorophyll absorbs mostly in the blue and to a lesser extent red portions of the electromagnetic spectrum, hence its intense green color.

Green substance in producers that traps light energy from the sun, which is then used to combine carbon dioxide and water into sugars in the process of photosynthesis Chlorophyll is vital for photosynthesis, which helps plants get energy from light.

Chlorophyll molecules are specifically arranged in and around pigment protein complexes called photosystems, which are embedded in the thylakoid membranes of chloroplasts.

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2 years ago