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
alexandr402 [8]
3 years ago
13

What volume of sample, in mL, would be needed to make 2 mL of a 5-fold dilution? (3 significant figures needed)

Chemistry
1 answer:
natulia [17]3 years ago
5 0

Answer:

0.400 mL

Explanation:

Hello, the dilution factor (in folds) is given by:

folds=\frac{total_{volume}}{sample_{volume}}

Thus, the sample volume with three significant figures is given by:

sample_{volume}=\frac{2mL}{5"folds"}=0.400 mL

Best regards.

You might be interested in
What does it mean to have protein in your urine?
konstantin123 [22]
It is often a sign of kidney problems. :)
6 0
3 years ago
What volume of a concentrated HCl solution, which is 36.0% HCl by mass and has a density of 1.179 g/mL, should be used to make 4
Ivenika [448]

Answer:

130ml of HCl(36%) in 4.90L solution => pH = 1.50

Explanation:

Need 4.90L of HCl(aq) solution with pH = 1.5.

Given pH = 1.5 => [H⁺] = 10⁻¹·⁵M = 0.032M in H⁺

[HCl(36%)] ≅ 12M in HCl

(M·V)concentrate = (M·V)diluted

12M·V(conc) = 0.032M·4.91L

=> V(conc) needed = [(0.032)(4.91)/12]Liters = 0.0130Liters or 130 ml.

Mixing Caution => Add 131 ml of HCl(36%) into a small quantity of water (~500ml) then dilute to the mark.

5 0
3 years ago
How to do lewis dot structure of nh3conh3
wlad13 [49]

Answer:

i'm not really sure i cant help today try a different question that i can help u with

Explanation:

3 0
3 years ago
Which term describes the weather in an area over a long period of time?
3241004551 [841]

Answer:

climate

Explanation:

causes it happens over a long period of time

6 0
3 years ago
How many milliliters of 0.0896M LiOH are required to titrate 25.0 mL of 0.0759M HBr to the equivalence point?
slavikrds [6]

Answer:

V_{LiOH}=21.8mL

Explanation:

Hello,

In this case, during titration at the equivalence point, we find that the moles of the base equals the moles of the acid:

n_{LiOH}=n_{HBr}

That it terms of molarities and volumes we have:

M_{LiOH}V_{LiOH}=M_{HBr}V_{HBr}

Next, solving for the volume of lithium hydroxide we obtain:

V_{LiOH}=\frac{M_{HBr}V_{HBr}}{M_{LiOH}} =\frac{0.0759M*25.0mL}{0.0896M} \\\\V_{LiOH}=21.8mL

Best regards.

8 0
3 years ago
Other questions:
  • What volume does 4.53 moles of hydrogen at 1.78 atm and 301 K occupy
    12·2 answers
  • The following situations are presented to a medical examiner. In which situation is the medical examiner most likely to gather m
    6·1 answer
  • Which is not a property covalent bonds ?
    8·1 answer
  • Why do some fuels when burnt produce more heat than others?
    12·1 answer
  • Coal and Diamond are two different form of carbon. which is denser?​
    13·2 answers
  • Is pentacosane a molecular compound?
    10·1 answer
  • 1. Explain how groups 1A-8A in the periodic table are organized by their number of valence electrons.
    15·1 answer
  • What is the frequency of the sinusoidal graph?
    5·1 answer
  • Definition: These are the layers of rock or soil that are distinguishable from other layers that have been
    9·1 answer
  • Methane gas, which may be present in confined spaces such as a basement, can cause death by __________.
    12·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!