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2 years ago

What is the standard state of oxygen?

Chemistry

2 answers:

Darina [25.2K]2 years ago

8 0

To oxygen atoms combined to form O_2[/tex] so they share electrons. They are in gas forms

Simora [160]2 years ago

4 0

O2 gas, where there are two Oxygen atoms which are covalently bonded together

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The smell of fresh cut pine is due in part to the cyclic alkene called pinene. Given the following data of pinene: Vapor pressur

Sveta_85 [38]

Answer: Heat of vaporization is 41094 Joules

Explanation:

The vapor pressure is determined by Clausius Clapeyron equation:

$ln(\frac{P_2}{P_1})=\frac{\Delta H_{vap}}{R}(\frac{1}{T_1}-\frac{1}{T_2})$

where,

$P_1$ = initial pressure at 429 K = 760 torr

$P_2$ = final pressure at 415 K = 515 torr

= enthalpy of vaporisation = ?

R = gas constant = 8.314 J/mole.K

$T_1$ = initial temperature = 429 K

$T_2$ = final temperature = 515 K

Now put all the given values in this formula, we get

$\log (\frac{515}{760}=\frac{\Delta H}{2.303\times 8.314J/mole.K}[\frac{1}{429K}-\frac{1}{415K}]$

$\Delta H=41094J$

Thus the heat of vaporization is 41094 Joules

4 0

2 years ago

What is the pH of a sample with [OH-] = 2.5 x 10-11 M?

sveticcg [70]

Answer:

The pH of the sample is 3,4.

Explanation:

We calculate the pOH from the formula pOH = -log (OH-). We know that for all aqueous solutions: pH + pOH = 14, and from there we clear pH:

pOH= -log (OH-)=10,60

pH + pOH = 14

pH + 10,60 = 14

pH=14 -10,60

pH=3,4

3 0

3 years ago

Explain the difference between the organism, population, and community levels of ecological organization

Naily [24]

Answer:

A population is a group of organisms belonging to the same species that live in the same area and interact with one another.

Explanation:

Levels of Ecological Organization

Level # 2. Population:

Level # 3. Community:

Level # 4. Ecosystem:

Level # 5. Biome:

Level # 6. Biosphere:

5 0

2 years ago

Use the information in the tables to determine whether the solution of the salt formed from the given acid + base combinations w

Shkiper50 [21]

Answer:

neutral,

acidic,

basic

4 0

2 years ago

Read 2 more answers

Grignard reactions are usually performed in ether solvent. Which statement below does not identify a safety concern associated w

nikdorinn [45]

Answer: A. Diethyl ether has a very low miscibility in wate

The fact that the diethyl ether is miscible or not in water does not imply a risk for the person who is working with this reagent in the laboratory.

However, the fact that diethyl ether forms explosive peroxides and that it is highly flammable implies that there is a risk of explosion when exposed to air and sunlight. On the other hand, as option C mentions, if a person inhales a large quantity of this reagent, they may lose consciousness and suffer some injury when fainting, due to the powerful anesthetic effect of this reagent. In conclusion, options B, C and D are statements that imply safety problems associated with the use of diethyl ether in the laboratory, while option A does not imply it.

6 0

3 years ago