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goldenfox [79]
3 years ago
12

As you move to a higher elevation (e.g. in the mountains), the air pressure drops significantly. In turn,

Chemistry
1 answer:
soldi70 [24.7K]3 years ago
3 0
The answer is C ( The evaporation rate of water increases at all temperatures causing an increase in volume.)                           
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How many molecules are there in 21.4 grams of Ca(OH)2?
nata0808 [166]

The answer would be 0.288827452320528

4 0
3 years ago
18-19. If a sample for spectrophotometric analysis is placed in a 10-cm cell, the absorbance will be 10 times greater than the a
miss Akunina [59]

Answer:

As long as it is a blank solution of the reagent, the Absorbance will be 0 regardless of the path length.

Explanation:

Absorbance of light by a reagent of concentration c, is given as

A = εcl

A = Absorbance

ε = molar absorptivity

c = concentration of reagent.

l = length of light path or length of the solution the light passes through.

So, if all.other factors are held constant, If a sample for spectrophotometric analysis is placed in a 10-cm cell, the absorbance will be 10 times greater than the absorbance in a 1-cm cell.

But the reagent blank solution is called a blank solution because it lacks the given reagent. A blank solution does not contain detectable amounts of the reagent under consideration. That is, the concentration of reagent in the blank solution is 0.

Hence, the Absorbance is subsequently 0. And increasing or decreasing the path length of light will not change anything. As long as it is a blank solution of the reagent, the Absorbance will be 0 regardless of the path length.

Hope this Helps!!!

5 0
3 years ago
Which band is the smallest within the electromagnetic spectrum? A) X rays B) microwaves C) radio waves Eliminate D) visible ligh
aev [14]
Radio   wave  eliminate  band (answer  c) is  smallest   within  electromagnetic  spectrum.
  
   The  electromagnetic  spectrum  is  the  range  of  frequencies  (the  spectrum)  of    electromagnetic  radiation   and  their  respective  wavelength and  photon  energies.  The   electromagnetic  spectrum  range from   radio  waves  to  gamma  rays.Radio waves  has  the  shortest  wavelength  while   gamma rays  has  highest.
4 0
3 years ago
Read 2 more answers
The electron-domain geometry of a carbon-centered compound ch4 is tetrahedral. the hybridization of the central carbon atom is _
Nata [24]
The  hybridization  of  the   central  carbon  compound  CH4  tetrahedral  is
SP^3 hybridization 

In   tetrahedral  molecular  geometry    a central atom  is  located  at the  center  with  4  substituent  that  are located at  the  corners  of  tetrahedron. Example  in methane  molecules  is made  up of  b equally  spaced sp^3  hybrid  orbital  forming  bond  angle  of   109.5
5 0
3 years ago
A container of carbon dioxide has a volume of 240 mL at a temperature of 22°C. If the pressure remains constant, what is the vol
astraxan [27]

Answer:

Volume of the CO_{2} gas at 44°C is <u>258 ml.</u>

Explanation

here,

using Charles' law ,

\frac{V}{T} =\frac{v}{t}

where , V= initial volume          v= final volume

             T=initial temperature    t = final temperature

Given - pressure is constant ,

so , putting the values -

V= 240ml

T= 22 + 273K = 295K                      (since converting celsius into kelvin that

                                                         is +273K )

v =?

t = 44+ 273K = 317K

Now , putting the given values in charles' law ,

\frac{240ml}{295K} =\frac{v}{317K}

240ml x317K = v x 295K     (through cross multiplication )

v =\frac{240ml\times317K}{295K}

= 258ml .

thus ,<u> the volume of carbon dioxide in a container at 44°C IS 258ml .</u>

7 0
4 years ago
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