What is locked up carbon dioxide

Answers

Answer 1

Answer: Basically it means carbon dioxide is removed from the atmosphere and is trapped in e.g. calcium carbonate (like shells), rocks, oceans etc.

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Which of the following is not a result of air pollution? A. Smog
B. Breathing problems
C. Global warming
D. Soil erosion

Answers

Smog is the combination of smoke and fog. Smokeis the result of human activity such as burning of wood, coal, etc. This is aresult of air pollution. Breathing problems are the effects of air pollutionbecause it destroys the respiratory system. Global warming is also an effect ofair pollution. The consecutive production of carbon monoxide fromtransportation vehicle, mismanagement of garbages contributes to globalwarming. Soil erosion however is the result of fluid always passing on to thatarea. This is not the result of air pollution. The answer is letter d.

D is the answer....all otherr are a result of pollution

A student determines that according to the reaction N2(g) + 3H2(g) --> 2NH3(g), if 34g of nitrogen gas is reacted with excess hydrogen, 41g of ammonia can be produced. When the actual reaction was complete, only 38g of ammonia formed. Determine the percent yield for the reaction.

Answers

Answer:

The percent yield of this reaction is 92.7 %

Explanation:

Step 1: Data given

Mass of nitrogen gas (N2) = 34.0 grams

Mass of ammonia (NH3 produced = 41.0 grams

Molar mass of N2 = 28.0 g/mol

Molar mass of NH3 = 17.02 g/mol

Actual yield of ammonia = 38 grams

Step 2: The balanced equation

N2(g) + 3H2(g) → 2NH3(g)

Step 3: Calculate moles

Moles = mass / molar mass

Moles N2 = 34.0 grams / 28.0 g/mol

Moles N2 = 1.214 moles

Step 4: Calculate moles NH3

For 1 mol N2 we need 3 moles H2 to produce 2 moles NH3

For 1.214 moles N2 we'll have 2* 1.214 = 2.428 moles NH3

Step 5: Calculate mass NH3

Mass NH3 = moles * molar mass

Mass NH3 = 2.428 moles * 17.02 g/mol

Mass NH3 = 41 grams

Step 6: Calculate percent yield for the reaction

Percent yield = (actuald yield / theoretical yield) * 100 %

Percent yield = (38 grams / 41 grams ) * 100 %

Percent yield = 92.7 %

The percent yield of this reaction is 92.7 %

Answer:

$Y=92\%$

Explanation:

Hello,

In this case, by considering the given chemical reaction, with given mass of nitrogen, one could compute the theoretical yield of ammonia as shown below and considering their 1 to 2 molar relationship in the chemical reaction:

$m_(NH_3)^(theoretical)=34gN_2*(1molN_2)/(28gN_2)*(2molNH_3)/(1molN_2)*(17gNH_3)/(1molNH_3) \nm_(NH_3)^(theoretical)=41.3gNH_3$

In such a way, the percent yield is obtained as shown below:

$Y=(m_(NH_3)^(actual))/(m_(NH_3)^(theoretical)) *100\%=(38g)/(41.3g) *100\%\n\nY=92.0\%$

Best regards.

The molecular mass of octane is 114.22 g/mol. What is the mass of 22.05 mol of octane?

Answers

In this item, we are asked to calculate for the mass of 22.05 mole of octane given that its molecular mass is equal to 114.22 g/mol. To answer this item, we simply have to multiply the number of moles with the molecular mass. That is, (114.22 g/mol)(22.05 mol) which is equal to 2518.221 grams.

In order to compute the mass of a substance, we may simply mulitply the number of moles of the substance by the molar mass of the substance, since molar mass is mass per mole. Therefore, we get: 114.22 * 22.05 = 2,518.55 grams 2,518.55 grams of octane are present.

Calculate the value of ?E in joules for a system that loses 115 J of heat and has 150 J of work performed on it by the surroundings.

Answers

Hey there!:

E = energy gained (input) - energy lost (output)

∆E = 150J - 115 J

∆E = 35 J

Hope that helps!

Final answer:

The change in internal energy (?E) of the system is 35 J based on the first law of thermodynamics.

Explanation:

This problem can be solved using the first law of thermodynamics, which states that the change in internal energy (?E) of a system is equal to the heat added to it (Q) minus the work done by it (W) - this is expressed as ?E = Q - W.

In this particular case, the system loses 115 J of heat, so Q equals -115 J (as it's lost, it's negative), and 150J work is performed on the system which equals +150 J (as work is done on it, it is positive). Therefore, substituting these values into the formula, we get: ?E = -115 J - (-150 J) = 35 J:

So, the change in internal energy of the system is 35 J.

Learn more about Internal Energy here:

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The answer is suppose to be B but I don’t understand why not D

Answers

Maybe something’s Nessus up

Identify the effect of increasing acidity on the solubility of the given compounds.

Answers

An addition of acid increases the solubility of calcium phosphate because the hydrogen ions can easily dissociate and form salts. And example is from the reaction 3H2SO4 + Ca3(PO4)2 → 2H3PO4 + 3CaSO4. CaSO4 is the salt of sulfuric acid and calcium phosphate.

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