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2 years ago

Which of these species are free radicals? check all that apply. check all that apply. no2 no o o2 o3?

1 answer:

4 0

Answer: NO2, NO, and O2.

Free radicals are toxic substances produced by the body. In normal circumstances,the body can neutralize but when the level of these substances is to much,they accumulate and can generate diseases, such as osteoporosis and cancer.

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A balloon inflated with three breaths of air has a volume of 1.7 L. At the same temperature and pressure, what is the volume of

Karolina [17]

Ans: The final volume of the balloon is 4.5 L

Given:

Volume of balloon inflated with 3 breaths = 1.7 L

To determine:

Volume of balloon after a total of 3+5 = 8 breaths

Explanation:

Volume of the balloon per breath = 1.7 L * 1 breath/3 breaths = 0.567 L

Final volume of balloon after 8 breaths = 0.567 L * 8 breath/1 breath

= 4.536 L

7 0

1 year ago

Molecular bromine is 24 percent dissociated at 1600 k and 1.00 bar in the equilibrium br2 (

dlinn [17]

Br2 == 2Br

24% dissociated => n total moles, 0.24 mol*n of Br, and 0.76*n mol of Br2

=> partial pressure of Br, P Br = 0.24 bar, and
partical pressure of Br2, P Br2 = 0.76 bar

kp = (P Br)^2 / P Br2 = (0.24)^2 / 0.76 = 0.0758

3 0

1 year ago

What is the mass in grams of 7.5 x 10^15 atoms of nickel?

satela [25.4K]

Atomic mass Ni = 58.69 a.m.u

58.69 g ----------------- 6.02x10²³ atoms
?? g --------------------- 7.5x10¹⁵ atoms

58.69x (7.5x10¹⁵) / 6.02x10²³

=> 7.31x10⁻⁷ g

6 0

2 years ago

Read 2 more answers

Which balanced redox reaction is occurring in the voltaic cell represented by the notation of A l ( s ) | A l 3 ( a q ) | | P b

telo118 [61]

Answer:

i dont know

Explanation:

7 0

1 year ago

Identify the Lewis acids and Lewis bases in the following reactions:

postnew [5]

Answer: 1. $H^++OH^-\rightarrow H_2O$ Lewis acid : $H^+$ , Lewis base : $OH^-$

2. $Cl^-+BCl_3\rightarrow BCl_4^-$ Lewis acid : $BCl_3$ , Lewis base : $Cl^-$

3. $K^++6H_2O\rightarrow K(H_2O)_6$ Lewis acid : $K^+$ , Lewis base : $H_2O$

Explanation:

According to the Lewis concept, an acid is defined as a substance that accepts electron pairs and base is defined as a substance which donates electron pairs.

1. $H^++OH^-\rightarrow H_2O$

As $H^+$ gained electrons to complete its octet. Thus it acts as lewis acid. $OH^-$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $H^+$ .

2. $Cl^-+BCl_3\rightarrow BCl_4^-$

As $BCl_3$ is short of two electrons to complete its octet. Thus it acts as lewis acid. $Cl^-$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $BCl_3$ .

3. $K^++6H_2O\rightarrow K(H_2O)_6$

As $K^+$ is short of electrons to complete its octet. Thus it acts as lewis acid. $H_2O$ acts as lewis base as it donates lone pair of electrons to electron deficient specie $K^+$ .

8 0

2 years ago