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3 years ago

Ahmed makes a Venn diagram to compare active transport and passive transport across the cell membrane.

Chemistry

1 answer:

lyudmila [28]3 years ago

4 0

Answer:

The labels are not given to represent but the correct answer would be one of these:

-Uses energy

- low concentration to high concentration movement

Explanation:

Active transport and passive transport both are transport methods of the molecules and substances in or out of the cell through the cell membrane. Passive and active transport has only one thing which is the movement of the substance through or across the cell membrane.

However, there are differences in these types of diffusion are:

Active Transport Passive Transport

-Uses energy - a form of diffusion

-Moves from low to high concentration - from high to low concentration

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Which step ONLY occurs in the formation of coal?

quester [9]

"Decaying swamps are covered with seawater" step ONLY occurs in the formation of coal.

Option: B

Explanation:

Coal production continues in regions of swampy wetlands because groundwater is near to or just above the topsoil. Because of this, organic matter is created quickly by the flora present-faster even than it can be broken down. Layers of organic matter are deposited in these areas, and then buried.

Based on the plants and circumstances present, the mechanism that produces coal varies somewhat in various areas but the ultimate method is similar. Coal production has two primary phases: peatification, and coalification. It is a solid black, readily combustible fossil fuel containing a large quantity of carbon-based material-about 50 percent of its mass.

5 0

3 years ago

Using the following reaction (depicted using molecular models), large quantities of ammonia are burned in the presence of a plat

Mila [183]

Answer:

17.65 grams of O2 are needed for a complete reaction.

Explanation:

You know the reaction:

4 NH₃ + 5 O₂ --------> 4 NO + 6 H₂O

First you must know the mass that reacts by stoichiometry of the reaction (that is, the relationship between the amount of reagents and products in a chemical reaction). For that you must first know the reacting mass of each compound. You know the values of the atomic mass of each element that form the compounds:

N: 14 g/mol
H: 1 g/mol
O: 16 g/mol

So, the molar mass of the compounds in the reaction is:

NH₃: 14 g/mol + 3*1 g/mol= 17 g/mol
O₂: 2*16 g/mol= 32 g/mol
NO: 14 g/mol + 16 g/mol= 30 g/mol
H₂O: 2*1 g/mol + 16 g/mol= 18 g/mol

By stoichiometry, they react and occur in moles:

NH₃: 4 moles
O₂: 5 moles
NO: 4 moles
H₂O: 6 moles

Then in mass, by stoichiomatry they react and occur:

NH₃: 4 moles*17 g/mol= 68 g
O₂: 5 moles*32 g/mol= 160 g
NO: 4 moles*30 g/mol= 120 g
H₂O: 6 moles*18 g/mol= 108 g

Now to calculate the necessary mass of O₂ for a complete reaction, the rule of three is applied as follows: if by stoichiometry 68 g of NH₃ react with 160 g of O₂, 7.5 g of NH₃ with how many grams of O₂ will it react?

$mass of O_{2} =\frac{7.5 g of NH_{3} * 160 g of O_{2} }{68 g of NH_{3} }$

mass of O₂≅17.65 g

17.65 grams of O2 are needed for a complete reaction.

3 0

3 years ago

When solutions of barium chloride and lithium sulfate are mixed, the spectator ions in the resulting reaction are?

Pepsi [2]

Barium chloride and lithium sulfate are mixed, barium sulfate and lithium chloride are formed. Barium sulfate is obtained as a white precipitate and lithium chloride as an aqueous solution.

Hope it helped!

8 0

3 years ago

Read 2 more answers

5 pois

schepotkina [342]

The remaining 90% transforms into Hydrogen and Oxygen. The remaining 90% is recombined to maker larger molecules. I think

6 0

3 years ago

Need help with this problem asap

ehidna [41]

Answer:

Is that all of the problem??