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3 years ago

which out of the four molecules only have a single element:Oxygen gas,liquid water,carbon disulfide,Neon gas.

Physics

2 answers:

expeople1 [14]3 years ago

6 0

Answer:

O2-oxygen

Explanation:

sattari [20]3 years ago

4 0

Oxygen and neon are single elements

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Under constant pressure, the temperature of 2.43 mol of an ideal monatomic gas is raised 11.9 K. What are (a) the work W done by

const2013 [10]

Answer:

Explanation:

Given

no of moles $n=2.43$

Temperature raised $\Delta T=11.9 k$

Work done by gas

$W=\int_{V_1}^{V_2}PdV$

$W=P\Delta V$

$W=nR\Delta T$

$W=2.43\times 8.314\times 11.9$

$W=240.41 kJ$

(b)Energy Transferred as heat

$Q=nc_p\Delta T$

$c_p$ =specific heat at constant Pressure

$c_p$ for ideal Mono atomic gas is $\frac{5R}{2}$

$Q=2.43\times \frac{5R}{2}\times 11.9$

$Q=601.03 kJ$

(c)Change in Internal Energy

$\Delta U=Q-W$

$\Delta U=601.03-240.41=360.62 kJ$

(d)Change in average kinetic Energy $\Delta k$

$K.E._{avg}=\frac{3}{2} \times k\times T$

$\Delta K.E.=\frac{3}{2} \times k\times \Delta T$ ,where k=boltzmann constant

$\Delta K.E.=\frac{3}{2}\times 1.38\times 10^{-23}\times 11.9$

$\Delta K.E.=2.46\times 10^{-22} J$

3 0

3 years ago

Identify if the verbs signal past, future, or present tense, and drag them to the appropriate box. I walked home. She will walk

jenyasd209 [6]

Answer:

Past

I walked home.

She studied.

He made a list.

Present

She walks home.

They leave the door open.

Future

She will walk home.

It will open next week.

Explanation:

7 0

3 years ago

The scientific study of how living things are classified is called

mars1129 [50]

Hi There!

The scientific study of how living things are classified is called?

<span>Taxonomy</span>

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3 years ago

An astronomer sees two stars in the sky. Both stars are equally far from Earth, but the first star is dimmer than the second sta

kvv77 [185]

Answer: It is smaller than the second star

Explanation: The brightness of a star depends on two factors: The distance from the Earth and size of the star. More the distance from the Earth, the star appears dimmer. And bigger the star, brighter it is.

$b =\frac{L}{4\pi d^2}$

Where L is the luminosity,d is the distance

Luminosity depends on the surface area of star $(4\pi R^2)$

Here, it is given that the two stars are at the same distance from the Earth. The first star is dimmer. We can conclude from this that first star star must be smaller than the second star.

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a business that sells products to teens would most likely create a website with a title ending in what suffix?

Nataliya [291]

I think you forgot to give the options along with your question. I am answering the question based on my knowledge and research. <span>A business that sells products to teens would most likely create a website with a title ending in .com. I hope that this is the answer that has actually come to your great help.</span>

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3 years ago

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