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4 years ago

What is the chemical formula for an alkene

Chemistry

1 answer:

aleksandr82 [10.1K]4 years ago

8 0

The formula for alkene is:

C nH 2n

(N is the number of carbon atoms in a molecule)

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How would you convert 500cc of 2M H2so4 in g/l and normality?

Ann [662]

Concentration :

196 g/L and 4 N

<h3> </h3><h3>Further explanation</h3>

The concentration of a substance can be expressed in several quantities such as moles, percent (%) weight / volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.

500 cc of 2M H₂SO₄

V = 500 cc = 0.5 L

mol H₂SO₄

$\tt mol=M\times V=2\times 0.5=1$

mass H₂SO₄ (MW = 98 g/mol)

$\tt mass=mol\times MW=1\times 98=98~g$

concentration in g/L :

$\tt \dfrac{98}{0.5}=196~g/L$

concentration in normality

Relationship between normality and molarity

N = M x n (n=valence , amount of H⁺ or OH⁻)

so :

$\tt N=2\times 2(n=2~for~H_2SO_4\rightarrow 2H^+)\\\\N=4$

6 0

3 years ago

Occurs when energy is added or removed

stepan [7]

Answer:

melting

Explanation:

one change of state happens when you add energy to the substance. This change of state is called melting. By adding energy to the molecules in a solid the molecules begin to move quicker and can break away from the other molecules.

5 0

3 years ago

A sample of hydrogen gas is collected over water at 25°C. The vapor pressure of water at 25°C is 23.8 mmHg. If the total pressur

Illusion [34]

The partial pressure of the gas will be the total pressure minus the vapor pressure. 523.8-23.8=500mmHg. This makes sense due to the fact that the idea of partial pressures still works even with vapor pressure since vapor pressure is just the partial pressure of water vapor (23.8mmHg) in the container which is added to the partial pressure of hydrogen gas (500mmHg) to make a total pressure of 523.8mmHg.
I hope this helps. Let me know in the comments if anything is unclear.

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3 years ago

Which statements describe abiotic factors in an environment? Check all that apply.

olga nikolaevna [1]

Soil retains water and nutrients.

Several rocks rest in a stream.

Clouds create shade that changes temperatures

Abiotic factors are non-living components in the environment, or rather components in the environment that are not derived from life.

Explanation:

Abiotic factors interact with biotic factors to create ecoystems. An example of biotic factors interacting with abiotic factors include plants utilizing sunlight for photosynthesis and a wild beast drinking water form a watering hole in the middle of the savanna.

Learn More:

For more on biotic and abiotic factors check out;

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3 years ago

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Which of the following is false regarding supersonic speed?