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KengaRu [80]
3 years ago
13

A percent composition analysis yields 46.7% nitrogen and 53.3% oxygen. What is the empirical formula for the compound

Chemistry
1 answer:
Korolek [52]3 years ago
6 0
Empirical formula is the simplest ratio of whole numbers of components in a compound
calculating for 100 g of compound 
                                                     N                                   O
mass                                          46.7 g                              53.3 g
number of moles                  46.7 g / 14 g/mol                 53.3 g / 16 g/mol 
                                                  = 3.33                               = 3.33
divide by the least number of moles 
                                                3.33/ 3.33 = 1.00              3.33/3.33 = 0
number of atoms 
N - 1
O - 1
therefore empirical formula is NO
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german
Actually elements aren’t called building blocks but it’s the atom. They are called that because you need two or more to form a molecule. So they are kind of like legos.
5 0
4 years ago
If an instrument has 10 ml td +/- 0.01 ml written on it, the user should ..... question 5 options: record 10 ml in the notebook
galina1969 [7]

Answer : The correct option is "record 10.00 ml in the notebook after using it."

Explanation :

If an instrument has "10 mL TD" written on it, that means the instrument is meant To Deliver (TD) 10 mL of volume.

Therefore the option that has 5.00 mL is not correct.

"+/- 0.01 mL" indicates the precision of the instrument. We know that no measurement is 100% accurate and there is always some uncertainty associated with any measurement.

Here, 0.01 indicates the uncertainty in the measurement.

When we have 0.01 mL , that means the instrument can record precisely to the hundredths place.

The more the significant figures, the greater is the accuracy of the measurement.

Therefore when we use an instrument that has "+/- 0.01 mL" written on it, we should record the reading as 10.00 mL  


6 0
3 years ago
Which of the following is a mixture?<br> aluminum<br> BaSO3<br> milk<br> table salt
rosijanka [135]
The accurate answer is

<span>Milk
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Glad to help :))
4 0
3 years ago
In which of the following cases would recrystallization be favored over extraction when purifying a mixture of two solid compoun
777dan777 [17]

Answer:

B. II.

Explanation:

The idea of recrystallization works when the solubility of the target substance decreases as the temperature of the solution decreases.

The method of recrystallization involves dissolving the solute in a suitable hot solvent and then allow the solution to cool gradually. The pure solute dissolves in the hot solvent and then separates out of the solution as it is cooled to room temperature.

Hence recrystallization is preferred over solvent extraction when the desired compound is poorly soluble in the solvent pair at low temperatures and greatly soluble in the solvent pair at high temperatures.

8 0
3 years ago
when a 12.7 g chunk of zinc dissolves in 500. ml of 1.450 m hcl, what is the concentration of hydrogen ions remaining in the fin
Schach [20]

Concentration of hydrogen ions remaining in the final solution is .673 M

In original solution we have 1.450M of HCl

1.450 M means 1.450 moles of HCl in 1 liter of water

Therefore, number of moles of HCl in 500ml of water will be

                                                           =  1.450*0.5 moles

                                                           =  0.725 moles of HCl

Reaction between HCl and Zn happens when zinc is added -

         Zn(s)  +  2HCl     →      ZnCl_{2}  +  H_{2}

Therefore two moles of HCl is needed for 1 mole of zinc

Thus number of moles of HCl needed to react with 12.7g of Zinc will be

                                   =  (12.7/ 65.38   moles      of Zn )* (2moles of HCl/mole of Zn)

                                   = .388 Moles

So moles of HCl left  = 0.725 - .3888

                                  =  0.3365 moles

In 1 Mole of HCl there is 1 mole of H because

                                    HCl  →  H^{+}  +  Cl^{-}

Therefore in 0.3365 mole HCl there will be 0.3365 moles of H

Thus final concentration of H ions in final solution is =

                                      =  0.3365mole/0.5 L

                                      = 0.673M

To know more about concentration in solution

brainly.com/question/22837979

#SPJ4

8 0
2 years ago
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