3 years ago

Which substance is a gas at room temperature and atmospheric pressure?

Physics

1 answer:

s2008m [1.1K]3 years ago

3 0

Answer:

Explanation:

A) Hg is mercury, a metal that is mostly liquid at STP (Standard Temp and Pressure), though some small portion of it will be gaseous in a closed container.

B) CH Methylidyne radical is a gas

It is not a stable compound because carbon has four valence electrons and only one of those is kept occupied by the hydrogen atom.

If this is supposed to be CH₄ which is methane, then also a gas at STP

C) C₂H₅OH is ethanol which is mostly a liquid at STP, though some small portion of it will be gaseous in a closed container.

D) H₂O is water and will be mostly liquid at STP, though some small portion of it will be gaseous in a closed container.

You might be interested in

Muscles make up ore than __ of a person body?<br>a.10<br>b.25<br>c40<br>d.75

exis [7]

40 percent of your body

8 0

3 years ago

Read 2 more answers

Provided the amplitude is sufficiently great, the human ear can respond to longitudinal waves over a range of frequencies from a

riadik2000 [5.3K]

Answer:

Check the explanation

Explanation:

The beat frequency is

df = f2 - f1

the wavelength is

lamda1 = (v/f1)

and lamda2 = (v/f2)

where v = 340 m/s,f1 = 25.0 kHz and f2 = 20.0 kHz

8 0

3 years ago

A wooden block slides down a ramp that is 12 meters long in 4 seconds. What was the average speed of the wooden block?\

ipn [44]

The answer is B) 3 m/s

Mark as brainliest ^-^

3 0

3 years ago

Read 2 more answers

BEST ANSWER GETS MARKED AS BRAINLIEST!!!! Can someone PLZ help me come up with a study method, no matter what I try, I just can'

Leni [432]

For physics, I would recommend to just keep doing practice problems and reviewing notes. Repetition of the same concepts will help drill it into your brain. Hope that helps!

8 0

3 years ago

Read 2 more answers

A block with a mass M = 4.85 kg is resting on a slide that has a curved surface. There is no friction. The speed of the block af

natali 33 [55]

Answer:

The correct option is a

Explanation:

From the question we are told that

The mass of the block is $m = 4.84 \ kg$

The height of the vertical drop is $h = 19.6 \ m$

Generally from the law of energy conservation , the potential energy at the top of the slide is equal to the kinetic energy at the point after sliding this can be mathematically represented as

$PE = KE$

i.e $m * g * h = \frac{1}{2} * m * v^2$

=> $gh = 0.5 v^2$

=> $v = \sqrt{\frac{9.8 * 19.6}{0.5 } }$

=> $v = 19.6 \ m/s$

4 0

3 years ago