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
Mnenie [13.5K]
3 years ago
7

A patient needs to be given exactly 500 ml of a 5.0% (w/v) intravenous glucose solution. the stock solution is 35% (w/v). how ma

ny milliliters of the stock solution are needed to prepare the fluid for the iv bag?
Chemistry
2 answers:
Sonbull [250]3 years ago
8 0

Answer is: 71.43 milliliters of the stock solution are needed.

V(solution of glucose) = 500 mL; voume of the solution.

ω(solution) = 5.0% ÷ 100%.

ω(solution) = 0.05.

ω(stock solution) = 35% ÷ 100%.

ω(stock solution) = 0.35.

Because weight of the glucose is the same in both solutions:

0.05 · 500 mL = 0.35 · V(stock solution).

V(stock solution) = 500 mL · 0.05 ÷ 0.35.

V(stock solution) = 71.43 mL.

N76 [4]3 years ago
6 0
In this question, the <span>patient needs to be given exactly 500 ml of a 5.0%. The content of the glucose should be:
</span>weight= volume * density* concentration<span>
500ml * 1mg/ml *5%= 25mg.

The </span><span>stock solution is 35%, then the amount needed in ml would be: 
weight= volume * density* concentration
25mg= volume * 1mg/ml *35%
volume= 25/35%= 500/7= 71.43ml</span>
You might be interested in
A scientist makes a boric acid (H3BO3) solution by dissolving 22.5 g of H3BO3 in water to make 750.0 mL of solution. Calculate t
GaryK [48]

Answer:

The correct answer is 0.36 mol

Explanation:

First we have to calculate the molecular weight (Mw) of H₃BO₃ from the molar masses of the elements:

Mw(H₃BO₃)= 3 x Molar mass H + Molar mass B + (3 x Molar mass O)

                  = 3 x 1 g/mol + 10.8 g/mol + (3 x 16 g/mol)

                  = 61.8 g/mol

The molecular weight indicates that there are 61.6 grams per mol of substance. The scientist has 22.5 g, thus we can calculate the number of moles of H₃BO₃ by dividing the mass into the molecular weight as follows:

Number of moles of H₃BO₃ = mass/Mw= (22.5 g)/(61.8 g/mol) = 0.36 mol

There are 0.36 mol of H₃BO₃ in 750.0 mL of solution.

6 0
3 years ago
Read 2 more answers
Which is the average kinetic energy of particles in an object?
Wittaler [7]

Answer:

A temperature

Explanation:

3 0
3 years ago
In which type of chemical reaction do two or more reactants combine to form one product, only?
xenn [34]
In decomposition, two or more reactant combine to form one product only.
8 0
3 years ago
A horizontal pipe 15 cm in diameter and 4 m long is buried in the earth at a depth of 20 cm. The pipe-wall temperature is 75 deg
Basile [38]

Explanation:

The given data for case (1) is as follows.

  h = 20 cm = 0.2 m

Assuming that a rectangular slab is placed above the pipe and we will calculate the heat transfer as follows.

              Q = kA \frac{\Delta T}{L}

  where,    A = area

                  L = length

                  k = thermal conductivity = 0.8 W/m

             \Delta T = change in temperature.

Therefore, putting the given values into the above formula as follows.

            Q = kA \frac{\Delta T}{L}

                = 0.8 W/m \times (4 m \times 0.15 m) \frac{75 - 5}{0.2}

                = 168 W

For case (2), h = 180 cm = 1.8 m

Therefore, heat lost will be calculated as follows.

                       Q = kA \frac{\Delta T}{L}

                           = 0.8 W/m \times (4 m \times 0.15 m) \frac{75 - 5}{1.8}

                           = 18.67 W

Thus, we can conclude that 18.67 W heat lost if the pipe was buried at a depth of 180 cm.

8 0
3 years ago
Where in the eukaryotic cells does succinyl CoA take place​
STatiana [176]
In eukaryotic cells the citric acid cycle takes place in the matrix of the mitochondria.
3 0
3 years ago
Other questions:
  • Which will not appear in the equilibrium constant expression for the reaction below
    13·2 answers
  • Given the equation representing a reaction: H2 O2 --&gt; H2O . What is the total mass of water formed when 8 grams of hydrogen r
    14·1 answer
  • Which statement correctly compares an atom of an alkali metal with an atom of the alkaline earth metal next to it on the periodi
    9·1 answer
  • I have no clue pls help
    15·1 answer
  • Which of the following quantities contains the greatest number of particles?
    12·2 answers
  • What do a mole of magnesium and a mole of iron have in common
    6·1 answer
  • For the following reaction, 3.70 grams of oxygen gas are mixed with excess carbon monoxide . The reaction yields 8.25 grams of c
    15·1 answer
  • What is a chemical equation?
    9·1 answer
  • A student prepares a 100.0 mL solution using 44.7 grams of potassium nitrite. They then take 11.9 mL of this solution and dilute
    12·1 answer
  • Diamonds and graphite are two forms of what nonmetal?.
    10·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!