The average daily mass of O2 taken up by sewage dischargedin the United States is 59 g per person. How many liters ofwater at 9 ppm O2 are 50 % depleted of oxygen in 1 day by apopulation of 1,200,000 people?

Q: in an average O3 molecules "lives" only 100-200 seconds in the stratosphere before undergoing…

A: Decomposition is a process in which single molecules break into more molecules. The reaction in…

Q: What volume of hydrogen will be produced at STP if 67.30 g of magnesium is reacted with an unlimited…

A: Number of Moles= Given Mass / Molar Mass

Q: Calculate the volume (m3) of hydrogen bromide that can be prepared by reacting 20.0g of phosphorus…

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Q: a) What mass of carbon dioxide is present in 1.00 m3 of dry air at a temperature of 17 ∘C and a…

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Q: If 33.7g of Methane, CH4 was burned in the presence of excess oxygen, what volume of water vapor,…

A: We know the balanced Chemical reaction of the burning of methane. From there we see that 33.7g of…

Q: Explain the effects of atmospheric sulfur dioxide to human health and to vegetation?

A: The atmosphere consists of various gases one of them is sulphur dioxide, one of the largest sources…

Q: Define the Ground-level ozone, which is the primary component of smog, forms when HC and NOx react…

A: The species ground level ozone will be the types of the secondary pollutant which will be produced…

Q: 8. What volume of NH, gas, collected over water at 23°C and 100 kPa, will be produced by the…

A: 8.  To find the volume of NH3 collected, we need to find the moles of NH3 produced first.

Q: What is the electron- pair geometry of the central oxygen atom of O-Zone (O3) ?

A: Ozone molecular formula O3  In ozone Central oxygen atom can share 3 electron pairs .

Q: Mass of CO2 formed early = 1.2 x 106 g The world burns approximately 3.8×1012 kg of fossil fuel per…

A: The volume of CO2 can be calculated as

Q: What properties of CFCs make them ideal for various commercialapplications but also make them a…

A: INTRODUCTION: What actually the CFCs is?? The full form of CFCs is chlorofluorocarbon, which contain…

Q: Gold is found in seawater at very low levels, about 0.05 ppb by mass. Assuming that gold is worth…

A: The concentration of gold is 0.05 ppb (parts per billion). This means it consists of 0.05 g of gold…

Q: Describe the origins and behavior of sulfur oxides and nitrogen oxides as air pollutants, including…

A: Nitrogen oxide i.e. NO2 is found in air as an air pollutant. It is mainly produced from burning of…

Q: What is the mass (in grams) of 5.00 L of CO2 at STP?

A: Principle: Molar Volume is defined as the volume occupied by one mole of any gas at STP(Standard…

Q: What volume in liters of fluorine gas is needed to form 903 L of sulfur hexafluoride gas if the…

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Q: What volume in liters of fluorine gas is needed to form 225 L of sulfur hexafluoride gas if the…

A: Given :  1. Mass of C6H12O6 = 21.3 gm  2. Volume of SF6 gas = 225 L  Pressure = 2 atm  Temperature =…

Q: calcula la molaridad de una disolucion de acido sulfurico (H2SO4) que se preparo disolviendo 58g del…

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Q: P4(g) + Br2(g) --> PBr3(g) What volume of bromine gas at 20 oC and 789 mmHg must be used to…

A: Since molar mass of phosphorus tribromide = 270.7 g/mol Hence moles of phosphorus tribromide to be…

Q: What volume in liters of fluorine gas is needed to form 381 L of sulfur hexafluoride gas if the…

A: Ideal gases are those gases which follow ideal gas equation. The relation between pressure, volume,…

Q: Write by equations the formation of O3 in a photochemical smog

A: formation of O3 in a photochemical smog.

Q: mass

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Q: What volume of hydrogen at 20.oC and 800. mm Hg will be formed by the reaction of 20.0 g of calcium…

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Q: 3. What is the essential gas needed by the human body from the external environ A. carbon dioxide B.…

A: A human body needs vital elements for their different processes occuring in body. There are trace…

Q: A student, following the procedure described to evaluate the Gas Law Constant, collected the…

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Q: Which among the following processes is a nitrogen fixation process?         a. Production of ozone

A: Rhizobium is a symbiotic nitrogen fixing bacteria present in the root of pea family plants.

Q: How many grams of hydrogen peroxide must decompose to give 55.0mL of oxygen at STP?  H2O2 (l) ⟶ H2O…

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Q: Complete and balance the following equations: (a) CaO1s2 + H2O1l2 ¡

A: Calcium oxide reacts with water to form calcium hydroxide. This reaction is highly exothermic in…

Q: what is the density in g/L (STP) of SO2?

A: Density is defined by the ratio of mass to the volume. it is expressed in mathematically is as…

Q: 7. A 5.0 L of sulfur hexafluoride is collected at 205.0°C and 350 kPa. What pressure must be applied…

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Q: If helium is released into one end of a glass tube of 2.00 meters at the same time krypton is…

A: Interpretation- To determine that where krypton end will meet when helium is released into one end…

Q: What is the biological significance of the stratospheric ozone layer at Earth’s surface?

A: The stratospheric ozone layer absorbs much of the damaging fraction of solar UV radiation and thus…

Q: How many grams of oxygen are required to produce 46.2 g of water vapor?

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Q: 2) How many moles of oxygen gas are required to fully consume 18.0 g of magnesium metal, producing…

A: 2Mg    +     O2      ------->    2MgO 2*24         32g                2(24+16) =48g…

Q: How many grams of sodium hydrogen carbonate decompose to give 18.8 mL of carbon dioxide gas at STP?…

A: AT STP,V = 18.8 m L = 18.8/1000 = 0.0188 LT = 273.15 KP = 1 atm R = 0.082057 L atm mol-1K-1 n =__…

Q: How many liters (L) of hydrogen sulfide (at 25 ºC and 1.00 atm) are obtained if 3.52 g of ferrous…

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Q: 73. A 500.-mL sample of O2 gas at 24 °C was prepared by decom- posing a 3% aqueous solution of…

A: According tom Dalton's law of partial pressure, Pressure in a container = Sum of partial pressures…

Q: Ozone molecules in the stratosphere absorb much of the harmful radiation from the sun. How many…

A: Given, T= 257 K P= 1.55  × 10−3 atm V = 1.00 L R = 0.0821 L.atm/K.mol

Q: Mg) + 2HC((aq) → MgCl2 (aq) + H2 (g) a. What mass of magnesium can react with 50.0 mL of 2.0 M HCl…

A: Given the reaction is as follows: Mg(s)+2HCl(aq)------------->MgCl2(aq)+H2(g) The volume of HCl,…

Q: How many moles of gaseous arsine (AsH₃) occupy 0.0400 Lat STP? What is the density of gaseous…

A: Volume of gaseous arsine (AsH₃)= 0.0400 L To determine moles and density of gaseous arsine (AsH₃) at…

Q: Write down the processes and related reactions to qualitatively determine the element N in the…

A: Explanation- Process- We can detect cyanide ion and hence, nitrogen ion in the sample by the…

Q: Determine the density of CO2 gas at STP. O 4.46 g/L O 1.96 g/L O 5.10 g/L O 2.24 g/L O 1.80 g/L

A: Determine the density of CO2 gas at STP ?

Q: How many moles of Xenon occupies a volume of 2.55 dm^3?

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Q: How many grams of zinc must be dissolved in sulfuric acid to obtain one (1) liter of hydrogen at…

A: Given that:  Volume of hydrogen gas obtained=1 L  T=20oC  =(20+273) K  =293 K P=790 mm Hg  =790 mm…

Q: Ozone molecules in the stratosphere absorb much of the harmful radiation from the sun. How many…

A: Given :-  Volume of air = 4.00 L  Temperature = 249 K  Pressure = 1.67 × 10-3 atm  To calculate :-…

Q: Predict the volume of oxygen (at 25 degrees Celsius and 743 mm Hg) that will be liberated if 1.00g…

A: The given reaction is,                            2Na2O2 (s) + 2 H2O (l)--> O2 (g) + 4 NaOH (aq)…

Q: When water is decomposed by electrolysis, what volume of oxygen at 25oC and 750. mm Hg is produced…

A: Answer:- Firstly a balanced decomposition reaction is written then using the stoichiometry and ideal…

Q: How many grams of sodium hydrogen carbonate decompose to give 27.6 mLmL of carbon dioxide gas at…

A:

Group 15 elements

The elements of group 15 are phosphorus, nitrogen, bismuth antimony, and arsenic. The most abundant element which is present in the air is nitrogen and the percentage of nitrogen present in the air is 78%. In the free state, the elemental nitrogen is present as diatomic gas (N2). In the organic matter obtained from plants and animals, phosphorus is the dominant element present. In nucleic acids, phosphate groups are present. Phosphates are also found in teeth and bones. The other elements arsenic, bismuth, and antimony are found as sulfides. Arsenopyrite, bismuth glance, and stibnite are examples of sulfides of arsenic, bismuth, and antimony respectively.