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Maurinko [17]
3 years ago
10

What is the frequency of radiation whose wavelength is 0.73 nm?

Chemistry
1 answer:
Travka [436]3 years ago
8 0
405 PHz
I might be wrong because that might be for 0.74 nm. We will see with out people answers
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Is phosphorous dissolving in carbon disulfide a physical or chemical property? if physical, is it intensive or extensive?
Nana76 [90]

Answer:  Phosphorus is insoluble in water, but soluble in carbon disulfide. Phosphorus burns spontaneously in air to its pentoxide.

Explanation: Hope this helped! :)

3 0
3 years ago
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Acetic acid has a Kb of 2.93 °C/m and a normal boiling point of 118.1 °C. What would be the boiling point of a solution made by
alexdok [17]

Boiling point elevation is given as:

ΔTb=iKbm

Where,

ΔTb=elevation in the boiling point

that is given by expression:

ΔTb=Tb (solution) - Tb (pure solvent)

Here Tb (pure solvent)=118.1 °C

i for CaCO3= 2

Kb=2.93 °C/m

m=Molality of CaCO₃:

Molality of CaCO₃=Number of moles of CaCO₃/ Mass of solvent (Kg)

=(Given Mass of CaCO3/Molar mass of CaCO₃)/ Mass of solvent (Kg)

=(100.0÷100 g/mol)/0.4

= 2.5 m

So now putting value of m, i and Kb in the boiling point elevation equation we get:

ΔTb=iKbm

=2×2.93×2.5

=14.65 °C

boiling point of a solution can be calculated:

ΔTb=Tb (solution) - Tb (pure solvent)

14.65=Tb (solution)-118.1

Tb (solution)=118.1+14.65

=132.75

3 0
3 years ago
Student perfotms a Benedict's test on an unknown substance. He adds reagent(the chemical required to make a color change), and n
elixir [45]

Answer:

Reducing sugars are absent

Explanation:

Benedict's solution is an substance used in testing sugars. It is mixture of sodium carbonate, sodium citrate and copper(II) sulfate pentahydrate. It can be used instead of Fehling's solution in testing for the presence of reducing sugars.

Reducing sugars contain the -CHO group. If there is no colour change after the addition of Benedict's solution, then we can conclude that reducing sugars are absent.

7 0
3 years ago
What is the balanced chemical equation for potassium and chlorine which form potassium chloride
ArbitrLikvidat [17]

Potassium metal + Chlorine Gas --------> Potassium Chloride<span>
The chemical equation using symbols and formula is
<span>K (s) + </span></span><span><span><span><span>Cl</span>2</span> </span><span>(g) ---------> 2KCl (s)</span></span>

3 0
2 years ago
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Differentiated cells will first organize themselves into ________
ziro4ka [17]
It's TISSUES.
CELLS, TISSUES, ORGANS, ORGAN SYSTEM, NEW ORGANISM
3 0
3 years ago
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