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vitfil [10]
2 years ago
8

What's a third reaction? (Chemistry)

Chemistry
1 answer:
OLga [1]2 years ago
3 0

Explanation:

a chemical reaction in which the rate of reaction is proportional to the concentration of each of three reacting molecules

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Which options correctly describe characteristics of noble gases? Select all that apply.
ANTONII [103]

This is the only option that correctly describe characterisitics of noble gases.  

All noble gases have a unique atomic fingerprint.


All noble gases have valence shells with 8 electrons but Heilum has only 2 valence electrons.

And all noble gases do not easily react with other elements as they have their outermost shell completly filled so they are highly stable.

All noble gases emits different colored light when electrified.

6 0
3 years ago
What is the maximum number of electrons in an atom n=4 l=1 ml=0
Nitella [24]

Answer:

18 electrons

Explanation:

when l=1, this tell you that it is "p sub shell"

4 0
2 years ago
Can someone please help me on the second quick Check!!!!
alexgriva [62]
#1 fossils paragraph 2
8 0
3 years ago
Read 2 more answers
if the percent by volume is 2% and the volume of solution is 250 mL what is the volume of solute and solution
Liula [17]

Answer:

Solute = 5 mL; solution = 250 mL  

Explanation:

The formula for percent by volume is

\text{Percent by volume} = \dfrac{\text{Volume of solute}}{\text{Volume of solution}}\times 100 \, \%

If you have 250 mL of a solution that is 2 % v/v,

\begin{array}{rcl}2 \, \% & = & \dfrac{\text{Volume of solute}}{\text{250 mL}}\times 100 \, \%\\\\2 \times \text{ 250 mL} & = & \text{Volume of solute} \times 100\\\text{Volume of solute} & = & \dfrac{2 \times 250\text{ mL}}{100}\\\\ & = & \textbf{5 mL}\\\end{array}

If there is no change of volume on mixing,

Volume of solution = 250 mL

 -Volume of solute = <u>     </u><u>5</u><u>      </u>

 Volume of solvent = 245 mL

5 0
3 years ago
Aspirin can be prepared from salicylic acid ( C 7 H 6 O 3 CX7HX6OX3), which has a molar mass of 138.12 g/mol, and acetic anhydri
pychu [463]

Answer: The theoretical yield of aspirin is 4.14 g

Explanation:

To calculate the moles :

\text{Moles of solute}=\frac{\text{given mass}}{\text{Molar Mass}}  \text{Moles of salicylic acid}=\frac{3.20g}{138.12g/mol}=0.023moles

mass of acetic anhydride = density\times volume =1.082g/ml\times 3.71ml=4.01g

\text{Moles of acetic anhydride}=\frac{4.01g}{102.04g/mol}=0.039moles

C_9H_6O_3+C_4H_6O_3\rightarrow C_9H_8O_4+C_2H_3O_2  

According to stoichiometry :

1 mole of salycylic acid require 1 mole of acetic anhydride

Thus 0.023 moles of  salycylic acid require=\frac{1}{1}\times 0.023=0.023moles  of acetic anhydride

Thus salycylic acid is the limiting reagent as it limits the formation of product and acetic anhydride is the excess reagent.

As 1 mole of salycylic give = 1 mole of aspirin

Thus 0.023 moles of salycylic acid give =\frac{1}{1}\times 0.023=0.023moles  of aspirin

Mass of aspirin = moles\times {\text {Molar mass}}=0.023moles\times 180.15g/mol=4.14g

Thus theoretical yield of aspirin is 4.14 g

4 0
3 years ago
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