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Elis [28]
2 years ago
6

A solution with a hydroxide ion concentration of 4.15 × 10-3 m is ________ and has a hydrogen ion concentration of ________.

Chemistry
1 answer:
kirza4 [7]2 years ago
6 0
 A  solution    with    a  hydroxide  ion   concentration  of  4.15   10^-3  m  is  basic  and has    a  hydrogen  ion  concentration of    2.41  x10  ^-12


hydrogen  ion  calculation
=  (H+) (OH-)  =  1  x10^-14
let   the  concentration  of  H+  be  represented  by  y

=( 4x10^-3)(y)  =  1  x10^-14

divide  both  side   by  4 x10^-3

y=  2.41  x10^-12m

 
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The best tool to use to locate the boundaries between countries is a(n) _____.
8_murik_8 [283]

The correct answer is (b) political map

The explanation:

when a political map: is different than other types of maps because it focuses on government or administrative boundaries rather than geographical or physical features. Instead of showing viewers what exists in the land, it shows those imaginary lines that serve to separate countries, states, territories, and cities. These maps generally include larger bodies of water, such as oceans, rivers, and lakes, as landmarks.

It was made by man not natural like the others maps.

so this is the correct answer.

8 0
3 years ago
An Argon laser gives off pulses of green light (wavelength = 514 nm). If a single pulse from the laser has a total energy of 10.
svetoff [14.1K]

Answer:

n=2.59\times 10^{16} photons

Explanation:

E=n\times \frac{h\times c}{\lambda}

Where,  

n is the number of photons

h is Plank's constant having value 6.626\times 10^{-34}\ Js

c is the speed of light having value 3\times 10^8\ m/s

\lambda is the wavelength of the light

Given that, wavelength = 514 nm = 514\times 10^{-9}\ m

Energy = 10.0 mJ = 0.01 J ( 1 mJ = 0.001 J )

Applying the values as:-

0.01=n\times \frac{6.626\times 10^{-34}\times 3\times 10^8}{514\times 10^{-9}}

\frac{19.878n}{10^{17}\times \:514}=0.01

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7 0
2 years ago
Which biogeochemical cycle is the only one that does not include the atmosphere?
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Answer:

Phosphorus cycle

Explanation:

Biogeochemical cycle, any of the natural pathways by which essential elements of living matter are circlated.

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Carbon cycle is the cycle in which photosynthesis and cellular respiration take place.

Water cycle involves transpiration.

Nitrogen cycle Is the cycle that is dependent upon bacteria for nitrogen fixation and denitrification.

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QveST [7]

Answer:

Explanation: There are 2 moles of C6H12O6 in 300 g C6H12O6 , rounded to one significant figure.

6 0
2 years ago
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