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3 years ago

What are items that are cycled through the biosphere in biogeochemical cycles

1 answer:

4 0

Some examples are the water cycle, the carbon cycle, the phosphorus cycle and the nitrogen cycle.

Hope this helps xox :)

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Which environment can occur for a short while and usually found in low level areas along rivers, lakes, and streams?

Svetradugi [14.3K]

The answer is wetland

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2 years ago

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Which of the following methods can be used to completely separate a solution containing alcohol and water?

liq [111]

A) i think is the answerrrrr

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3 years ago

In an acid-base titration, a base or acid is gradually added to the other until they have completely neutralized each other. Sin

Xelga [282]

Answer:

1/10 or 0.1

Explanation:

Quantities at which equivalence can be obtained are:

95, 96, 97, 98, 99, 100, 101, 102, 103, 104

Number of quantities = N = 10

Probability that the equivalency is obtained exactly at 100 mL can be calculated as follows:

P(X = 100) = (Number of favourable outcomes) / (Total Number of Outcomes)

P(X = 100) = 1/10

P(X = 100) = 0.1

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3 years ago

Doing an experiment about electroplating, you attempt to coat silver in gold using a basic electroplating set-up. You take the m

Elan Coil [88]

Answer:

it’s mass was greater than when it started

Explanation:

When a metal is coated with another metal, the plating metal deposits on the plated metal. Usually, the plating metal functions as the anode while the plated metal functions on the cathode. The anode metal is oxidized and reduced at the cathode and become deposited on the cathode material. This increases the mass of the cathode. Hence the mass of the silver/gold product is greater than the mass of silver at the beginning of the electroplating process.

3 0

3 years ago

determine the pressure in kpa of hydrogen gas produced when 29.51g of aluminum reacts with excess sodium hydroxide and water if

Mashcka [7]

The pressure of hydrogen gas is 276.25 Kpa .

Given,

Mass of aluminum = 29.51g

Temperature (T) = 25.67 degC =298.67 K

Volume (V) = 14.75 L

The required equation when aluminum reacts with excess sodium hydroxide and water is given by ,

2Al + 2NaOH + 2H2O ==>2NaAlO2 + 3H2

molecular mass of aluminum =26.98 g

1 mole of aluminum= 26.98g

2 moles of aluminum = 53.96g

2 mole of aluminum produces = 3 moles of hydrogen gas

53.96 g of aluminum produces = 6 g of hydrogen gas

29.51 g of aluminum produces = 6*(29.51) /53.96 =3.28 g of hydrogen gas

Thus ,

2 g of hydrogen gas = 1 mole of hydrogen

3.28 g of hydrogen gas = 3.28/2 mole =1.64 mol of hydrogen

Thus , n = 1.64 mol

According to ideal gas equation ,

PV=nRT

P=nRT/V

P = 1.64 * (0.0821L atm K^-1mol^-1 ) *(298.67 K)/14.75L

P=2.726 atm

P= 276.25 Kpa

Hence the pressure of hydrogen gas is 276.25 Kpa .

Learn more about hydrogen gas here :

brainly.com/question/19813237

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3 0

1 year ago