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2 years ago

Based on the name, which substance is a covalent compound?

Chemistry

1 answer:

Sindrei [870]2 years ago

3 0

Answer:

dinitrogen pentoxide

Explanation:

Based on the research, dinitrogen pentoxide is a chemical compound containing only nitrogen and oxygen which is both nonmetal. When two nonmetals or two negatively charged atoms try to form bonds, they always form covalent bonds. Hence, Dinitrogen Pentoxide is not ionic - it is covalent.

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True or False: All material has the same density.

Burka [1]

Answer:

Different materials have different densities. So it is False

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3 years ago

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Why do the gases on the periodic table tend to form negative ions?

boyakko [2]

Because the valence shell of gases wants to become full

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3 years ago

9 different lab rules Explain how students will do a safe lab

motikmotik

Answer:

Report all accidents, injuries and breakage of class or equipment to instructor immediately.
Keep pathways clear by placing extra items on the shelves or under the work tables. If under the tables make sure that these items can no be stepped on.
Long hair (chin-length or longer) must be tied back to avoid catching fire.
Wear sensible clothing including footwear. Loose clothing should be secure so they do not get caught in a flame or chemicals.
Work quietly - know what you are doing by reading the assigned experiment before you start to work. Pay close attention to any cautions described in the laboratory exercises.
Do not taste or smell chemicals.
Wear safety goggles to protect your eyes when heating substances, dissecting, etc
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Never point a test tube being heated at another student or yourself. Never look into a test tube while you are heating it.

Hope this helps:))

Please mark me as Brainliest.

4 0

3 years ago

Read 2 more answers

If the concentration of fluoride anion and aluminum cation was increased to 5 m, by how much would the measured ecell change?.

ladessa [460]

If the concentration of fluoride anion and aluminum cation was increased to 5M, then there would be decrease in Ecell by 0.055 volts

The standard reduction potential of Fluoride anion and aluminum cation are -

2Al -----> 2Al3+ + 6e- $E^o$ cell = +1.66

6e- + 3F2 -----> 6F- $E^o$ cell = +2.87

The complete reaction is -

2Al + 3F2 ------> 2Al3+ + 6F- $E^o$ = +4.53

Using Nernst Equation :-

E = $E^o$ – 0.0592/n*log[Al3+]^2[F-]^6

n = 6 (n = number of transferred electrons)

E = +4.53 - 0.0592/6*log(5)^2(5)^6

E = +4.53 - 0.00987*log(25)(1.56 x 10^4)

E = +4.53 – 0.00987*log(3.9 x 10^5)

E = + 4.53 -0.00987(5.59)

E = + 4.53 - 0.055

E = +4.47

The change in Ecell = 5 - 4.47 = 0.055V

Learn more about Ecell -

brainly.com/question/10203847

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6 0

2 years ago

Which of these electron transitions correspond to absorption of energy and which to emission?

Elan Coil [88]

Answer:

n = 5 to n = 6 absorption

n = 9 to n = 6 emission

n = 6 to n = 4 emission

n = 6 to n = 7 absorption

Explanation:

According to the Bohr's model of the atom. An electron in an atom may absorb energy and move from a lower energy level to a higher energy level. This requires absorption of energy that is equal to the energy difference between the two levels.

Similarly, an electron may move from a higher to a lower energy level, releasing energy that is equal to the energy difference between the higher and the lower level. This is known as emission.

Hence, if the electron is moving from a lower energy level to a higher energy level, an absorption has taken place, e.g n = 5 to n = 6

When an electron moves from a higher energy level to a lower energy level, an emission has taken place e.g n = 9 to n = 6

5 0

3 years ago