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3 years ago

What’s is inside a cell? Crossword puzzle

Chemistry

1 answer:

Sophie [7]3 years ago

3 0

1: ribosomes
5: nucleus
11: vacuole
13: rough endoplasmic reticulum
10: chloroplasts
8: cellulose
12: chromosome
7: cell membrane
3: organelle

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Diego has been observing how well a type of plant grows in diffrent locations.he convludes that location with bright sunlight is

andrew-mc [135]

Actually this is wrong because not all plants need sunlight to grow best in different locations because take a cactus for example it can grow directly in your home and it doesn't need a lot of water or sunlight

4 0

3 years ago

A permeation membrane separates an inlet air stream, F, (79 mol% N2, 21 mol% O2), into a permeate stream, M, and a reject stream

Norma-Jean [14]

Answer:

Permeate stream: M=10,47 L/min
Reject stream: J=38,24 L/min

Explanation:

Using the law of mass conservation, we have that the moles of any component in the inlet air stream equals the moles of this compenent in the two outlets stream. Being A the mole flowrate for the permeate stream and B the mole flowrate for the reject stream (both in mol/min), we have equation (1) and (2):

Oxygen:

2 mol/min * 0,21 = A mol/min * 0,50 + B mol/min * 0,13 ......................(1)

0,42 = 0,5A + 0,13B...........................(1)

Nitrogen:

2 mol/min * 0,79 = A mol/min * 0,50 + B mol/min * 0,87 ......................(2)

1,58 = 0,5A + 0,87B...........................(2)

Solving this system:

1,58 = 0,5A + 0,87B...........................(2)

0,42 = 0,5A + 0,13B...........................(1)

1,16 = 0A + 0,74B...............................(2) - (1)

1.16=0,74B

1,16/0,74=B

B=1,57 mol/min

And now replacing B in equation (1):

1,58 = 0,5A + 0,87*1,57

1,58-1,37=0,5A

0,21/0,5=A

A=0,43 mol/min

To calculate the volumetric flowrate of the permeate stream (M) and the reject stream (J), we just replace the given and calculate data into the ideal gas equation:

PV=nRT,.................... V = nRT/P

Permeate stream:

$M= \frac{0,43 \frac{mol}{min}*8,314\frac{m3Pa}{molK}*293K }{0,1 MPa*\frac{10^{6}Pa }{1 MPa} }=0,01047\frac{m^{3} }{min} * \frac{1000 L}{1 m^{3} }=10,47 L/min$

Rejct stream:

$J= \frac{1,57 \frac{mol}{min}*8,314\frac{m3Pa}{molK}*293K }{0,1 MPa*\frac{10^{6}Pa }{1 MPa} }=0,0382\frac{m^{3} }{min} * \frac{1000 L}{1 m^{3} }=38,24 L/min$

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3 years ago

Which of the following elements has the lowest ionization energy?

larisa86 [58]

Answer:

Explanation:

Ionization energy is defined required energy to eliminate or remove an electron from an ion or atom.

From the given elements Rb or Rubidium has the lowest ionization energy as it has lowest shielding effect, so it easy to remove electron from it's shell.

The ionization energy generally decreases from top to bottom in groups due to lower shielding effect and outer electrons are loosely packed so easy to remove and increases from left to right across a period because of valence shell stability.

Rubidium has atomic number 37 and lies below than other given elements and also placed in the left side in the periodic table.

Hence, the correct option is Rb

8 0

3 years ago

What are the assumptions we make when using the gas collection apparatus in this lab? (Select all that apply)

stich3 [128]

We collect gas using special apparatus because most gasses cannot be seen, hence we may find it difficult to tell if our test tube is filled, and the best method to collect gas is through water.

One of the apparatus we use in collecting gas is pneumatic trough. A pneumatic trough is a piece of laboratory apparatus used for collecting gases, such as hydrogen, oxygen and nitrogen.

Assumptions we make when using the gas collection apparatus

The assumption we make is on the basis of the ideal gas assumption which are:

The gas consists of a large number of molecules, which are in random motion and obey Newton's laws of motion;
The volume of the molecules is negligibly small compared to the volume occupied by the gas; and
No forces act on the molecules except during elastic collisions of negligible duration.

For more information on the ideal gas assumption kindly visit

brainly.com/question/16829906

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3 years ago

Which fats result when manufacturers add hydrogen to fat molecules in vegetable oil?

VladimirAG [237]

The type of fat that is described above is the trans fat. The trans fat is artificially made and these fat contains partially hydrogenated oils which is similar to the statement above. The reason why they are added to oil like vegetable oils so that there property could become solid.

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3 years ago

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