Answer:
Postassium bisulphate - KHSO4 - can be used as an food preservative to protect the food from micro-organisms.
Answer:- Frequency is .
Solution:- frequency and wavelength are inversely proportional to each other and the equation used is:
where, is frequency, c is speed of light and is the wavelength.
Speed of light is .
We need to convert the wavelength from nm to m.
( )
=
Now, let's plug in the values in the equation to calculate the frequency:
= or
since,
So, the frequency of the green light photon is .
Answer:
2350kg of Al₂O₃
Explanation:
<u><em>Step 1 : Write the balanced chemical equation:</em></u>
4Al + 3O₂ → 2Al₂O₃
<u><em>Step 2: Find the Ratio of Al :</em></u> Al₂O₃
Al : Al₂O₃
4 : 2
2 : 1
4700: 2350
= 2350kg of Al₂O₃
Answer:
Trimethylacetaldehyde
Explanation:
For the <u>unknow compound</u> we have a molar mass of 86 g/mol. We have an even value for the mass, so the compound does <u>not have nitrogen</u> and we can have several posibilities:
A)
B)
C)
D)
If we check the IR info a signal in 1730 cm-1 appears, this indicates that we have an <u>oxo group</u> (C=O). So, the D option can be discarded. The groups that can have the oxo group are: Carboxylic acids, <u>Ketones and aldehydes</u>.
We don have a signal in 3000 cm-1, so the carboxylic acid can be discarded. Now, is we check the info for the 1H NMR we only have 2 signals. If we only have 2 we will have a very<u> symmetric compound</u>.
By trial an error the find the compound <u>Trimethylacetaldehyde</u> (Figure 1).