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
yuradex [85]
2 years ago
13

The recommended maintenance dose of penicillin for children is 1.0 mg/kg/hr by injection. Of 10 mL of a 25 mg/mL solution of pen

icillin is added to a 100 mL bottle of saline, what is the delivery rate for a 40 pound child
Chemistry
1 answer:
SOVA2 [1]2 years ago
5 0

This problem is providing us with the recommended maintenance dose of penicillin for children as 1.0 mg/kg/hr by injection. Thus, the delivery rate for a 40-pound child is required, if 10 mL of a 25 mg/mL solution of penicillin is added to a 100-mL bottle of saline. At the end, the result is 8.0 mL/hr:

<h3>Dimensional analysis:</h3>

In chemistry, dimensional analysis allows us to obtain a specific result given relevant information about it. Although a formula is not always provided, one can use the units as a reference for the calculations.

For example, this problem asks for the rate, in mL/hr, at which a child gets this dose, so the first step will be to get the mass of the child in kilograms:

40 lb*\frac{0.4536kg}{1lb}= 18.144kg

Next, we calculate the rate at which the penicillin is delivered to this child:

1.0\frac{mg}{kg*hr} *18.144kg=18.144\frac{mg}{hr}

After that, we calculate the total mass of penicillin that is delivered:

10mL*25\frac{mg}{mL} =250 mg

And get the new concentration once it is diluted to 100 mL:

\frac{250mg}{10mL+100mL}=2.27\frac{mg}{mL}

And finally, we combine the mg/hr with the mg/mL to get the result in mL/hr as required:

18.144\frac{mg}{hr} *\frac{1mL}{2.27mg}\\ \\=8.0\frac{mL}{hr}

Learn more about dimensional analysis: brainly.com/question/10874167

You might be interested in
Hydrogen is a special ,because it can act like two groups,____and_____
LuckyWell [14K]

Answer:

First and seventeenth group.

Explanation:

Hydrogen is a special case as it has only one electron in its outermost orbital.

The hydrogen can lose or can accept electron easily.

Thus it can form positive ion similar to alkali metals and negative ion similar to halogens.

Thus it can fall into two groups

a) I group [Alkali metals]

b) 17th Group [Halogens]

5 0
3 years ago
State two reasons atom X is different than atom X+1
insens350 [35]

Explanation:

atom X

it is neutral

and may not exist independently

atom X+1

it is ion which has a charge on it positive or negative

it exists independently

6 0
2 years ago
Which way does equilibrium shift
Natali [406]
You can use Le Chatelier's Principle to describe the equilibrium shift.

Le Chaterlier's Principle states that: "<span>If a dynamic equilibrium is disturbed by changing the conditions, the position of equilibrium moves to counteract the change."

Thus, if you heat up the reaction, the equilibrium shift favors the endothermic reaction. If you increase pressure (if gases are involved), the shift favors the reaction that produces less gaseous products (to counteract pressure) and so on.</span>
8 0
3 years ago
Determine the energy in joules of a photon whose frequency is 3.55 x10^17 hz( with units)
kogti [31]

i think it is this

Explanation:

3 0
3 years ago
A good conductor of heat
MAVERICK [17]
Metal is a conductor of heat
8 0
3 years ago
Other questions:
  • The state of matter of a material depends on its what?
    13·2 answers
  • Instructions:Select the correct answer. A certain skin lotion is a fine mixture of water and various oils. This lotion is cloudy
    10·1 answer
  • Which elements are designated as the alkaline-
    11·1 answer
  • What is "free" nitrogen?
    13·2 answers
  • I NEED HELP!!!!!!!!!!!!!!!!
    5·1 answer
  • What rule is observed when naming an oxyacid that does have oxygen in its formula?
    8·2 answers
  • ________ was nearly eradicated when society decided to mass produce and use a vaccine created by jonas salk
    10·2 answers
  • How does a nuclear reactor produce electricity
    10·1 answer
  • Which statement describes ionic bonds?
    8·1 answer
  • You have 5.00 L of 6.0 M KNO3. What volume does the solution need to be diluted to
    11·1 answer
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!