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Musya8 [376]
3 years ago
10

D5W is a solution used as an intervenous fluid.It is 5.0% by mass solution of the dextrose (C6H12O6) in water. if the density of

D5W is 1.029 g/ml. Calculate the molarity of the dextrose in the solution.
Chemistry
1 answer:
Alona [7]3 years ago
6 0

Answer:

0.29 mol/L

Explanation:

Its density is 1.029 g/ml so in a liter (1000 mL) there is 1029 g of solution, but only 5% is dextrose.

0.05x1029=51.45

So in a liter of D5W solution there is 51.45 g of dextrose.

Dextrose molar mass iss 180.156 g/mol, so in 51.45 g of dextrose there is

51.45/180.156=0.29 mol

In one liter of solution there is 0.29 mol of dextrose, so the molarity of such solution is 0.29 mol/L.

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How is energy transfer different from energy transformation?
stepan [7]

Answer:

Transformation is into a different type of energy Ex: chemical to physical

Transfer is going to a to a place Ex: door knob to you

Explanation:

Plz brainliest

Thanks

5stars

5 0
3 years ago
What is the final pressure (expressed in atm) of a 3.05 L system initially at 724 mm Hg and 298 K, that is compressed to a final
maksim [4K]

Hey there!:

V1 = 3.05 L

V2 = 3.00 L

P1 = 724 mmHg

P2 = to be calculated

T1 = 298 K

T2 = 273 K

Therefore:

P1*V1  / T1  = P2*V2 / T2

P2 = ( P1*V1 / T1  )   * T2 / V2

P2 = 724 * 3.05 * 273 / 298 * 3.00

P2 = 602838.6 / 894

P2 = 674.31 mmHg

1 atm ----------- 760 mmHg

atm ------------- 674.31 mHg

= 674.31 * 1 / 760

= 0.887 atm

Hope this helps!

5 0
4 years ago
Zoe is frying eggs in a pan. The eggs cook because of _____ of heat. Zoe feels hot as she stands near the stove mostly because o
erica [24]

Answer:

1) conduction

2) Radiation

Explanation:

Conduction is a mode of heat transfer by which heat energy is transferred through a material, the average position of the particles of the material remaining the same.

Radiation is a process of heat transfer by which heat is transferred from a hotter to a cooler point without any intervening medium.

The pan used to fry the egg is a conductor of heat hence heat can pass through it by conduction thereby enabling the eggs to cook.

Heat can travel without an intervening medium hence Zoe feels hot near the stove. This ability of the heat to travel without an intervening medium is called radiation.

6 0
3 years ago
Read 2 more answers
Are these correct? (chemistry)
bekas [8.4K]

Answer:

Yes

Explanation:

Because the higher radiation, people can get health problems and burns when exposed to high levels of heat.

4 0
4 years ago
A cup has a mixture of iron filings, sand, and salt. How could you separate theses 3 materials? Write out the procedures you wou
Anarel [89]

Explanation:

A cup of mixtures of iron fillings, sand and salt is a mixture who constituents are in the same phase i.e solid.

To separate them out we use the physical properties of the substances.

  • First spread out the mixture uniformly over a piece of paper or on the table.
  • Pass a bar magnet over it.
  • The iron fillings will become attracted to the magnet and separate from the mixture.
  • then pour water into the mixture of sand and salt
  • the salt will dissolve since sand is made up of quartz which are highly insoluble.
  • separate the water solution. Evaporate to dryness and recover the salt.
  • the sand is left behind and dried.

learn more:

Mixtures brainly.com/question/1832352

#learnwithBrainly

3 0
3 years ago
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