Stoichiometry: ammonia reacts with oxygen gas to form nitrogen monoxide and water...?
this question requires you to find out the limiting reagent 4 NH3 + 5 O2 ---> 4 NO + 6 H2O find the mole of each reactant and divide each by the coefficient in the chemical equation to get 1to1 ratio. after that, the smaller value is the limiting reagent. 1.50g NH3 x (1mol / 17.03052g) = 0.088077mol NH3 (0.088077mol NH3) / 4 = 0.02201925mol NH3 2.75g O2 x (1mol / 31.9988g) = 0.0859407mol O2 (0.0859407 mol O2) / 5 = 0.01718814mol O2 since, O2 has a smaller mole value. therefore O2 is the limiting reagent. now you use the amount of limiting reagent in mole to find how many grams of NO formed. 0.0859407mol O2 x (4mol NO / 5mol O2) = 0.06875256mol NO 0.06875256mol NO x (30.0061g NO / 1mol NO) = 2.06g NO therefore this reaction produced about 2.06g of NO
How limestone building damage?
Some buildings are made from limestone which is mainly calcium carbonate. Gases in the atmosphere such as sulfur dioxide, SO2, and nitrogen dioxide, NO2, can be responsible for damaging these buildings. Describe how these gases come to be present in the atmosphere and explain how they can damage a limestone building.
What happens when calcium hydroxide reacts with carbon dioxide? Is the reaction dangerous?
In aqueous solution, the mechanism of the reaction of calcium hydroxide with CO2 to form calcium carbonate and water is essentially acid-base neutralisation (double displacement reaction), followed by a precipitation reaction (also a double displacement reaction).CO2(g) + H2O(l) —-> H+(aq) + HCO3-(aq)HCO3-(aq) —→ H+(aq) + CO3–2(aq)Ca(OH)2(aq) + 2H+(aq) —-> Ca+2(aq) + 2 H2O(l) (acid- base neutralisation)Ca+2(aq) + CO3–2(aq) —-> CaCO3(s) (precipitation)The overall reaction is;- Ca(OH)2 + CO2 —-> CaCO3 + H2O .The gas-solid reaction however proceeds by two different reaction mechanisms, and occurs at elevated temperatures;-When calcium hydroxide is heated to 512 °C, the partial pressure of water vapour in equilibrium with it reaches 101 kPa (normal atmospheric pressure), which decomposes the calcium hydroxide into calcium oxide and water.Ca(OH)2(s) —512°C--> CaO(s) + H2O(g) (thermal decomposition reaction)Calcium oxide spontaneously reacts with CO2 to form calcium carbonate. This reaction is used in the laboratory as well as in industry to remove CO2 from a gas stream;-CaO(s) + CO2(g) —-> CaCO3(s) (synthesis reaction)The overall reaction is again;- Ca(OH)2 + CO2 —-> CaCO3 + H2O .
When acid rain falls on limestone what weathering occurs?
http://en.wikipedia.org/wiki/Acid_rain The paragraph below is from the website above. Acid rain is a rain or any other form of precipitation that is unusually acidic, meaning that it possesses elevated levels of hydrogen ions (low pH). It can have harmful effects on plants, aquatic animals, and infrastructure. Acid rain is caused by emissions of carbon dioxide, sulfur dioxide and nitrogen oxides which react with the water molecules in the atmosphere to produce acids. Governments have made efforts since the 1970s to reduce the release of sulfur dioxide into the atmosphere with positive results. Nitrogen oxides can also be produced naturally by lightning strikes and sulfur dioxide is produced by volcanic eruptions.The chemicals found in acid rain can cause paint to peel, corrosion of steel structures like bridges and stone statues to begin to appear old and worn down, which reduces their value and beauty. The acid reacts with calcium carbonate to produce CO2, H2O, and a calcium compound. The new calcium compound is more soluble than CaCO3, limestone. So the acid rain slowly reacts and dissolves the limestone.
How does nitric acid react with calcium carbonate?
2HNO3 + CaCO3 -> Ca(NO3)2 + H2O + CO2