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
Nataly_w [17]
3 years ago
14

2mL of a serum sample was added to 18mL of phosphate buffered saline (PBS) in Tube 1. 10mL of Tube 1 was added to 40mL of PBS in

Tube What is the dilution of serum in Tube 2?
Chemistry
1 answer:
Sladkaya [172]3 years ago
4 0

Answer:

Tube 2 has a total dilution of 1:50

Explanation:

We have a 2 ml serum sample added to a 18 mL phosphate buffered saline sample in tube 1. This means now in tube 1 there is 20 mL.

We have a 1:10 (= 2:20) dilution here.

10 ml of this 1:10 diluted tube 1 is taken and added to a 40 mL of PBS in tube 2.

Now we have 50 mL in tube 2.

This is a 10:50 (= 1:5) dilution.

The total dilution is 10x5 = 50

So the total ditultion has a rate 1:50

Tube 2 has a total dilution of 1:50

You might be interested in
A standard solution is prepared for the analysis of fluoxymesterone (c20h29fo3; 336 g/mol), an anabolic steroid. a stock solutio
-Dominant- [34]

<em>Answer:</em>

  • The concentration of new solution will be 1×10∧-7 M.

<em>Solution:</em>

<em>Data Given </em>

       given mass of fluoxymesterone =16.8mg = 0.0168 g

       molar mass  of fluoxymesterone = 336g/mol

       vol. of fluoxymesterone = 500.0 ml = 0.500 L

      Stock Molarity of  fluoxymesterone = (0.0168/336)÷0.500 = 1×10∧-4 M

So applying dilution formula

                   Stock Solution :  New Solution

                                 M1.V1 = M2.V2

       ( 1×10∧-4 M) × (1×10∧-6 L) = M2 × 0.001 L

     [( 1×10∧-4) × (1×10∧-6)]÷[0.001] = M2

     1 × 10∧-7 = M2

<em>Result:</em>

  • The concentration of new solution M2 will be  1 × 10∧-7
3 0
3 years ago
Using the diluted solution from the 100-mL volumetric flask, rinse a 1-mL vol. pipet with a few drops and then pipet exactly 1.0
lara [203]

Answer:

The color of the solution turned a clear brown sort of a copper color

Explanation:

The color of the solution turned a clear brown sort of a copper color.

This is because ASA and the FeCl3 are reacting in a manner that it is resulting in the creation of a metal.

4 0
3 years ago
SOMEONE HELP ME WITH THIS !
kap26 [50]

Answer:

nah im good

Explanr[]

oiuyutyrtervefation:

5 0
3 years ago
Which of these objects have potential energy?
Korolek [52]

Answer:

it's C. but the sentence is incorrect I think it should be a ball "in" someone's hand

Explanation:

cause potential energy is the energy that is stored in an object due to its position relative to some zero position. An object possesses gravitational potential energy if it is positioned at a height above (or below) the zero height.

8 0
3 years ago
Carbon monoxide is 1. an atom, an element and a mixture. 2. a molecule, element and a pure substance. 3. an atom, a compound and
SSSSS [86.1K]

Answer:

The correct answer is option (6).

Explanation:

A molecule is group of atoms of same or different kinds of element.

In carbon monoxide there is a single carbon atom and single oxygen atom. Hence, a molecule.

Compound is defined as a chemical specie which is made by the combination of different atoms.

As we can see from the chemical formula of carbon monoxide is made up of two atom of different elements that is carbon and oxygen.

A pure substance is defined as the substance which is formed by same or different type of atoms which are chemically combined in a fixed ratio by mass. They have definite set of properties.

C+\frac{1}{2}O_2\rightarrow CO

1 mole of carbon combined with 0.5 moles of oxygen gas to give carbon monoxide gas.

4 0
3 years ago
Other questions:
  • Which of the following describes a physical property? A) gunpowder explodes B) when two substances are mixed with a precipitate
    7·2 answers
  • Examples of electromagnetic wave
    5·1 answer
  • 9. Why do areas near large bodies of water tend to not experience large swings in temperature? (2 points)
    14·2 answers
  • A jet flies over the ocean. A sound wave travels from the jet to the surface of the ocean. Almost none of the energy from the so
    13·1 answer
  • Which of the following represents a decomposition reaction? A. AC + B → AB + C B. A + B + C → ABC C. ABC → A + B + C D. AB + CD
    11·1 answer
  • Assignment Directions: Pick one of the following chemists and perform a bit of research on him/her. Answer the following questio
    5·1 answer
  • Help me please!!!!!!!!
    15·2 answers
  • Please help me on this 3 question I need help.
    15·1 answer
  • How many molecules are in 0.0740 mol NH3?
    6·1 answer
  • Indicate the electron pair geometry and the molecular geometry for each of the six compounds. Compound Electron pair geometry Mo
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!