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
xz_007 [3.2K]
3 years ago
6

A drug is supplied as a 40 mg/ml solution in a 50 ml vial. you need to make 10 ml of a 10 mg/ml solution. how much concentrate w

ill be needed? ml how much diluent will be needed? ml
Chemistry
1 answer:
Ymorist [56]3 years ago
8 0

Answer: -

2.5 mL

Explanation: -

Volume of final solution = 10 mL

Strength of final solution = 10 mg / mL

Amount of drug required = Volume of final solution x strength of final solution

= 10 mL x 10 mg/ mL

= 100 mg.

Strength of supplied drug = 40mg/ mL

Volume of supplied drug required = \frac{100 mg}{40 mg/ mL}

= 2.5 mL

Thus to make 10 ml of a 10 mg/ml solution. 2.5 mL will be needed.

You might be interested in
Kepler’s second law of planetary motion states which of the following?
aev [14]
Kepler stated three laws of planetary motion.

First law states that the pathway of a planet is an ellipse with the Sun at one of the foci.

Second law states that an imaginary line joining the Sun and a planet sweeps out equal areas during equal lengths of time.

Third law states that the square of the period of the orbit of a planet is directly proportional to the cube of the length of the distance from the Sun.

Therefore, the answer is that Kepler's second law of planetary motion states that planets cover the same area during equal time periods.
6 0
3 years ago
All of the following contribute to the large, negative, free-energy change upon hydrolysis of "high-energy" compounds except: a.
klasskru [66]

Answer:

C) low activation energy of forward reaction

Explanation:

Activation energy for the forward reaction is the quantity of free energy which is needed for a reaction to move from the reactant phase of energy level to the transition state of energy level. The higher the rate of energy level, the slower the chemical reaction.

Activation energy is a barrier that must be overcome for a reaction to take place.

8 0
3 years ago
A sample of carbon-12 has a mass of 6.00 g. How many atoms of carbon-12 are in the sample?
Vesna [10]
Convert grams to moles [grams/molar mass] ~ Moles
Convert moles to atoms [moles * 6.02 x 10^23] = Atoms
Half of 6.02 x 10^23 is 3.01 x 10^23 so here is our answer.
3 0
3 years ago
Read 2 more answers
Select all of the answers that apply. Water _____. has a pH of 0 can dissolve most substances contains dissolved minerals expand
aleksandrvk [35]
<span>Water: *can dissolve most substances * contains dissolved minerals *expands when it freezes</span>
5 0
3 years ago
Read 2 more answers
In which of the following substances does sharing of electrons between two atoms occur?
malfutka [58]

Answer:- B- SO_4^-^2

Explanations:- Sharing of electrons takes place between non metals and the bond formed by the sharing of electrons is known as covalent bond. In first choice we only have a zinc metal and so no sharing of electrons  would be possible here.

In third choice we have NaCl. Na is a metal and Cl is a non metal. The property of metals is to transfer its valence electrons to the non metal and the bond formed is known as ionic bond. So, third choice is also not correct.

In choice B we have sulfate ion that has sulfur and oxygen atoms and both of these are non metals. So, sharing of electrons is present here between the S and O atoms and covalent bonds are formed.

So, choice B- SO_4^-^2 is the right answer.


6 0
2 years ago
Other questions:
  • If 97.7 ml of silver nitrate solution reacts with excess potassium chloride solution to yield 0.326 g of precipitate, what is th
    12·1 answer
  • What is the definition of relief in science terms
    15·1 answer
  • As an atom's nucleus gets larger the electric charges repelling the protons get larger. To compensate for this greater electric
    10·2 answers
  • 2. Perform this operation and report the answer to the correct number of significant figures: What is the mass of a cube of alum
    5·1 answer
  • Can hydrobromic acid be a valid chemical formula?
    7·1 answer
  • How many molecules of carbon dioxide are in 243.6 g of carbon dioxide
    5·1 answer
  • 86.64 g LiBr mol LiBr
    8·2 answers
  • How does specific heat capacity affect heating rate
    10·1 answer
  • Neptunium-237 was the first isotope of a transuranium element to be discovered. the decay constant is /s. what is the half-life
    9·1 answer
  • An isotonic salt solution is 0.90% (w/w) nacl in water. how many grams of nacl are contained in 1.00 kg of such a solution?
    14·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!