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Setler79 [48]
3 years ago
10

Compare and contrast nitrogen and phosphorus cycles

Chemistry
1 answer:
azamat3 years ago
7 0

The phosphorous cycle does not include an atmospheric component because phosphorous does not cycle through the atmosphere. In comparison, important processes of the carbon and nitrogen cycle occur in the atmosphere

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Which is an example of chemical change
Oksanka [162]
Mixing of posted colours
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3 years ago
Chlorine consists of two isotopes with masses of 35 and 37. If the average atomic mass of a sample of chlorine atoms is 35.5, wh
Elza [17]

Answer:

The ratio 35Cl/37Cl =  3/1

Explanation:

<u>Step 1:</u> Data given

Chlorine has 2 isotopes:

- mass = 35 g/mol

- mass = 37 g/mol

Average molar mass of chlorine = 35.5 grams

<u>Step 2: </u>Calculate the % of isotopes

35x + 37y = 35.5

x+y = 1 or x = 1-y

35(1-y) + 37y = 35.5

35-35y +37y = 35.5

0.5 = 2y

y = 0.25 = 37Cl

x = 1 - 0.25 = 0.75 = 35Cl

<u>Step 3: </u>

The ratio 35Cl/37Cl = 0.75/0.25 = 3/1

7 0
4 years ago
What controls the amount of product formed in a chemical reaction
melisa1 [442]

Answer: limiting reactant controls the amount of product formed in a chemical reaction.

* Hopefully this answers your question :) Mark me the brainliest:)

~ 234483279c20~

5 0
4 years ago
Why does the flask have to be closed during the hydrochloric acid and sodium carbonate reaction?
Orlov [11]

Answer:

The flask has to be closed during the hydrochloric acid and sodium carbonate reaction as the resultant gas got trapped inside the closed flask.

Explanation:

The hydrochloric acid and sodium carbonate reaction was exothermic that caused the pressure to decrease. The flask has to be closed during the hydrochloric acid and sodium carbonate reaction as the resultant gas got trapped inside the closed flask.

In exothermic reactions, energy is produced in the form of heat or light.

4 0
3 years ago
How many liters of hydrogen gas at stp are produced from the reaction of 50.0g of magnesium and 75g of hydrochloric acid
ss7ja [257]
Here's how to do it: 

<span>Balanced equation first: </span>
<span>Mg + HCl = H2 + MgCl2 unbalanced </span>
<span>Mg + 2 HCl = H2 = MgCl balanced </span>
<span>Therefore 1 mole Mg reacts with 2 moles Hcl. </span>
<span>50g Mg = ? moles (a bit over 2; you work it out) </span>
<span>75 g HCl = ? moles (also a bit over 2; you work it out) </span>
<span>BUT, you need twice the moles HCl; therefore it is the Mg that is in excess. (you can now work out how many moles are in excess, and therefore how much mg is left over). </span>

<span>So, 2 moles HCl produce 1 mole H2(g) </span>
<span>therefore, the amount of H2 produced is half the number of moles of HCl </span>
<span>At STP, there are X litres per mole of gas (look it up - about 22 from memory) </span>
<span>Therefore, knowing the moles of H2, you can calculate the volume</span>
8 0
4 years ago
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