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3 years ago

Is it C???

Chemistry

2 answers:

9966 [12]3 years ago

6 0

The right answer is indeed letter c

Bess [88]3 years ago

6 0

Answer: B. compound

Explanation: "A compound is a substance made up of two or more elements that can only be separated by chemical means. The elements that make up the compound are always resent in the same ratio."

"A mixture does not have a fixed ratio. The components of a mixture keep their unique properties and identities. They can be separated physically."

I know this is late but maybe it will help someone else in the future.

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Need help with these two pls!!

denis23 [38]

what is a fire piston?

*a tool for starting a fire, likely invented in Ancient Southeast Asia.*

dont know the second one lol.

8 0

3 years ago

The work function is the energy that must be supplied to cause the release of an electron from a photoelectric material. The cor

vladimir2022 [97]

Answer:

No photoelectric effect is observed for Mercury.

Explanation:

From E= hf

h= Plank's constant

f= frequency of incident light

Threshold Frequency of mercury= 435×10^3/ 6.6×10^-34 × 6.02×10^23

f= 11×10^14 Hz

The highest frequency of visible light is 7.5×10^14. This is clearly less than the threshold frequency of mercury hence no electron is emitted from the mercury surface

3 0

4 years ago

The equilibrium constant has been estimated to be 0.12 at 25 °C. If you had originally placed 0.069 mol of cyclohexane in a 2.8

scZoUnD [109]

Answer: Concentrations of cyclohexane and methylcyclopentane at equilibrium are 0.0223 M and 0.0027 M respectively

Explanation:

Moles of cyclohexane = 0.069 mole

Volume of solution = 2.8 L

Initial concentration of cyclohexane = $\frac{moles}{Volume}=\frac{0.069}{2.8}=0.025M$

The given balanced equilibrium reaction is,

cyclohexane ⇔ methylcyclopentane

Initial conc. 0.025 M 0

At eqm. conc. (0.025-x)M (x) M

The expression for equilibrium constant for this reaction will be,

K= methylcyclopentane / cyclohexane

Now put all the given values in this expression, we get :

$0.12=\frac{(x)}{(0.025-x)}$

By solving the term 'x', we get :

x = 0.0027

Concentration of cyclohexane at equilibrium = (0.025-x ) M = (0.025-0.0027) M = 0.0223 M

Concentration of methylcyclopentane at equilibrium = (x ) M = (0.0027) M

4 0

3 years ago

6. Plants play a vital role in the environment because photosynthesis

Vanyuwa [196]

Answer:

Explanation:

Plants help in carbon dioxode reduction so plants uses atmospheric carbon dioxide and water to produce sugars and oxygen.

HOPE ITS HOPEFUL.

6 0

3 years ago

Read 2 more answers

How many moles of chlorine gas would occupy a volume of 35.5 L at a pressure of 100.0 kPa and a

Nikolay [14]

Answer:

this was the last of .the last 555543 years of 55my in

Explanation:

4 0

3 years ago