1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
ludmilkaskok [199]
3 years ago
13

How many microliters of original sample are required to produce a final dilution of 10-2 in a total volume of 0.2 mL? 1 microlit

er is 10-6 L or 10-3 mL.
Chemistry
1 answer:
Kisachek [45]3 years ago
3 0

Answer:

The required volume of the original sample required is 2 micro liter

Explanation:

assuming the original sample concentration is 1N

after  final dilution of 10-2 solution concentration becomes 0.01 N

normality of original sample  = 1 N

normality  of final solution = 0.01 N

volume of  original sample= ?

volume of   final solution  = 0.2 mL

Considering thef formula below :

N1V1 = N2V2

V1 = (N2V2)/N1

= (0.01*0.2)/1

= 0.002 mL

1 milli liter = 1000 micro liter

0.002 mL = 2 micro liter

The original sample required is 2 micro liter

You might be interested in
Why is reaching activation energy necessary
padilas [110]
Activation of energy is the foundation of chemical being react in a solution. If activation energy is not reached then no reaction would happen.
6 0
3 years ago
In a redox reaction, what happens to a substance’s charge when it is oxidized?
sammy [17]
I use the acronym LEO for oxidation reactions. This stand for: Lose electrons Oxidation, so when oxidation occurs, electrons are lost. Due to electrons having a negative charge, substance undergoing oxidation have a more POSITIVE charge.



Pls Thank + Branliest its good for my ego :P
7 0
3 years ago
Ni is the symbol for what element?
nignag [31]
Ni is for Nitrogen.
7 0
3 years ago
Read 2 more answers
If 1 inch = 2.54cm how much cm = 1 foot?
Alexus [3.1K]

Answer:

30.48 cm equals a foot

Explanation:

6 0
3 years ago
Read 2 more answers
You are working in your laboratory and decide to do some cleaning. You find a test tube with some brown substance congealed at t
Anna [14]

Answer:

  • <em>The mystery substance is</em> <u>C. Bromine (Br) </u>

Explanation:

<em>Argon (Ar) </em>is a noble gas. Whose freezing point is -189 °C (very low), thus it cannot be the frozen substance. Also, it is not reactive, thus is would have not reacted with iron. Hence, argon is not the mystery substance.

<em>Scandium (Sc) </em>is a metal from group 3 of the periodic table, thus is will not react with iron. Thus, scandium is not the mystery substance.

Both <em>bromine</em> and <em>iodine</em> are halogens (group 17 of the periodic table).

The freezing point of bromine is −7.2 °C, ​and the freezing point of iodine is 113.7 °C. Thus, both could be solids (frozen) in the lab.

The reactivity of the halogens decrease from top to bottom inside the group. Bromine is above iodine. Then bromine is more reactive than iodine.

Bromine is reactive enough to react with iron. Iodine is not reactive enough to react with iron.

You can find in the internet that bromine vapour over hot iron reacts  producing iron(III) bromide. Also, that bromine vapors are red-brown.

Therefore, <em>the mystery substance is bromine (Br).</em>

7 0
3 years ago
Other questions:
  • How many atoms are in 131.97 liters of water vapor at STP?
    13·1 answer
  • _____states that the physical and chemical properties of the elements are periodic within the sequence of their atomic numbers.
    10·2 answers
  • One way in which the useful metal copper is produced is by dissolving the mineral azurite, which contains copper(II) carbonate,
    10·2 answers
  • How many atoms are in c8h8o3?<br> Show your work
    6·1 answer
  • How many grams of NaNO3 are there in 625.0 mL of a .325 M NaNO3 solution
    10·2 answers
  • A 25.0 g sample of an alloy was heated to 100.0 oC and dropped into a beaker containing 90 grams of water at 25.32 oC. The tempe
    8·1 answer
  • Sodium nitrate is used in fertilizers, explosives, and glass manufacturing. Give the formula for this compound
    12·1 answer
  • What are five different types of air pollutant each
    10·1 answer
  • Solve for x<br> ax + by = 2abx<br><br> Please help
    5·1 answer
  • Please help i will give 20 points
    15·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!