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Elan Coil [88]
3 years ago
9

Please help!!!!!!!!!!!!!!!

Chemistry
1 answer:
svlad2 [7]3 years ago
3 0
The 2nd one is the right answer

Hope this helped
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Convert 0.00763 nL to L
Reptile [31]

Answer:

7.63\cdot10^{-12} L

Explanation:

Conversion problems could be solved using dimensional analysis for convenient use and understanding. Dimensional analysis is a technique of multiplying the measure we have by a fraction corresponding to some two equal measures in different units.

In order to apply dimensional analysis here, we firstly need to know that a prefix 'n' stands for 'nano', and nano means 10^{-9}. In this case, we have nanoliters. Using the prefix, we can find a relationship between nanoliter and liter:

1 nL = 10^{-9} nL

We may now apply dimensional analysis. Since we wish to convert into liters, we'll be multiplying the number we have in nL by a fraction that contains this relationship with liters in the numerator and nanoliters in the denominator, so that nL terms cancel out and we would obtain the final answer in liters:

0.00763 nL\cdot \frac{10^{-9} L}{1 nL}=7.63\cdot10^{-12} L

6 0
3 years ago
Which example best shows conservation of resources?
Inessa05 [86]

Answer:

Recycling aluminum cans and glass bottles

7 0
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How do we know what earth’s interior is like below the deepest drill holes ???
anzhelika [568]
From rocks and lava and earthquakes
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3 years ago
How many moles of water would be used reacting with 500g of P4010? *
makvit [3.9K]

Answer:

410

Explanation:

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5 0
2 years ago
A student was asked to determine the concentration of ammonia, a volatile substance used in the clinical setting as a respiretor
UNO [17]

This question is describing two chemical equations whereby the concentration of ammonia has to be determined. The first reaction is between 25.00 mL of ammonia and 50.00 mL of 0.100-M HCl whose excess was neutralized with 21.50 mL of 0.050-M Na₂CO₃ and thus, the concentration ammonia in the cloudy solution was determined as 0.114 M.

First of all we need to go over the titration of the excess HCl with Na₂CO₃ by writing the chemical equation it takes place when they react:

2HCl+Na_2CO_3\rightarrow 2NaCl+CO_2+H_2O

Whereas the mole ratio of HCl to Na₂CO₃ is 2:1 and the volume of the HCl leftover is determined as follows:

V_{HCl}^{leftover}=\frac{2*0.050M*21.50mL}{0.100M} =21.5mL

Next, we infer that the consumed volume of HCl by the ammonia solution was:

V_{HCl}^{consumed}=50.00mL-21.50mL=28.5 mL

Then, we write the chemical equation that takes place between ammonia and HCl:

HCl+NH_3\rightarrow NH_4Cl

Whereas the mole ratio is now 1:1, which means that the concentration of ammonia was:

M_{NH_3}=\frac{28.5mL*0.100M}{25.00mL}\\\\ M_{NH_3}=0.114M

Learn more:

  • (Titration) brainly.com/question/15687419
  • (Titration) brainly.com/question/25328286
8 0
2 years ago
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