Given the incomplete equation for the combustion of ethane:2C2H6 + 7O2==>4CO2 + 6 ____
What is the formula of the missing product?
(1) CH3OH (3) H2O
(2) HCOOH (4) H2O2
Answers
Answer : The correct option is, (4)
Explanation :
Combustion reaction : It is a reaction in which a hydrocarbon react with the oxygen gas to produces carbon dioxide as water as a products.
The given incomplete equation are :
In this equation, we see that a hydrocarbon and oxygen gas are present on reactant side and carbon dioxide are present on product side but water molecules are missing on the product side. So, we are adding water on missing side.
The given complete equation will be :
Therefore, the formula missing on product is,
Related Questions
Which balanced equation represents an endothermic reaction?(1) C(s) + O2(g) → CO2(g)(2) CH4(g) + 2O2(g) → CO2(g) + 2H2O(l)(3) N2(g) + 3H2(g) → 2NH3(g)(4) N2(g) + O2(g) → 2NO(g)
Will a precipitate form when NaCl(aq) and AgNO3 (aq) are mixed together?
In the pie chart below, which of the following represents the amount of Earth's water located in the oceans?A pie chart with part A representing 2%, part B representing .8%, part C representing .2% and part D representing 97%. A only A and B C only D only
If a straight-chain hydrocarbon is a gas at room temperature, how many carbon atoms will it have?A. 6 carbon atomsB. 12 carbon atomsC. 24 carbon atomsD. 3 carbon atoms
Answers
You just need to convert the g into moles using the formula:
moles = mass/molar mass
= 5.6/(39.1+16+1)
= 5.6/56.1
= 0.1 moles
So this makes it 0.1 moles dm^-3
Answers
The correct student is Student D, who says that Fluorine (F) has the highest ionization energy because the smaller the atom, the stronger the attraction between protons and valence electrons.
The stronger the attraction, the more energy is needed to remove a valence electron.
Ionization energy refers to the energy required to remove an electron from an atom. Smaller atoms have a stronger attraction between the positively charged protons in the nucleus and the negatively charged electrons in the outermost energy level. As a result, it takes more energy to remove an electron from a smaller atom like fluorine. This is because the electrons are held more tightly due to the stronger attraction.
So, the reasoning provided by Student D correctly explains why Fluorine has the highest ionization energy among Selenium (Se) and Fluorine (F).
Learn more about ionization energy from the link given below.
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I think the Answer is C because Flourine is stronger in electron attraction and is smaller so it has a stronger electronic pull. Hope this helps :)
Answers
Answer:
The object will not float in water because the density of the object is greater than that of water.
Explanation:
Density of object = 1.75 g/mL
Density of water = 1 g/mL
The Density of the object is 1.75 g/mL and that of water is 1 g/mL. This implies that the object is denser (i.e heavier) than water. Therefore, the object will not float in water, rather it will sink in water since it's density is greater than that of water.
Answers
Answer: Mixture: Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze
Pure substance: Copper wire, distilled water, table salt, oxygen.
Explanation:
Mixture is a substance which is made up two or more number of compounds which chemically inactive and retain their distinct chemical properties.
Blood , Self raising flour,muesli ,dyes, milk, tea, air, bronze
Pure substance is defined as anything with uniform and unchanging composition is known s pure substance.
Copper wire, distilled water, table salt, oxygen.
In a laboratory synthesis, a student begins with 2.90 mL of acetic anhydride (density=1.08gml−1) and 1.23 g of salicylic acid. Once the reaction is complete, the student collects 1.24 g of aspirin.
1. Determine the theoretical yield of aspirin for the reaction. Express your answer using three significant figures.
2. Determine the percent yield of aspirin for the reaction. Express your answer using three significant figures.
Answers
Answer:
1.- Theoretical yield is 1.64 g of aspirin
2.- %Yield is 75.6%
Explanation:
The theoretical yield of aspirin could be calculated by the molar relation between anhydride acetic and salicylic acid which is 1:1. It means that the reaction of one mole of anhydride acetic with one mole of salicylic acid will produce 1 mole of aspirin and one mole of acetic acid.
It is possible to calculated the number of moles using moles=grams/molar mass. in the attached figure we can see the molar mass of each compound.
The number of moles of anhydride acetic can be calculated using the density and the volumen.
g=(1.08 g/mL)*(2.90 mL)=3.13 g of anhydride
moles= 3.13 g/(102.09 g/mol)= 0.031 moles of anhydride acetic
The same for salicylic acid and we have:
moles= 1.23g/ (138.12 g/mol)= 0.0090 moles of salicylic acid
There is not 1:1 relation between this two compounds because there is much more anhydride acetic than salicylic acid, so the reaction is limited by the 0.0090 moles of salicylic acid which produce 0.0090 moles of aspirin.
g= moles*molar mass
Theoretical yield of aspirin= (0.009 moles)*(182.13 g/mol)= 1.64 g
The percent yield of aspirin for the reaction can be calculated using the nex formula:
%yield= ((real yield)/(theoretical yield))*100
The real yield was 1.24 g of aspirin
%Yield=(1.24g/1.64)*100=75.6%
Final answer:
To determine the theoretical yield of aspirin, calculate the moles of acetic anhydride and salicylic acid, use the balanced equation to find the moles of aspirin, and convert to grams. The percent yield is calculated by dividing the actual yield by the theoretical yield and multiplying by 100.
Explanation:
To determine the theoretical yield of aspirin, we need to first calculate the number of moles of acetic anhydride and salicylic acid. Then, we use the balanced equation to find the number of moles of aspirin produced. Finally, we convert the moles of aspirin to grams using its molar mass. The percent yield is calculated by dividing the actual yield by the theoretical yield and multiplying by 100.
Step 1: Calculate the moles of acetic anhydride
2.90 mL × 1.08 g/mL = 3.132 g
Moles of acetic anhydride = mass / molar mass = 3.132 g / 102.09 g/mol = 0.0307 mol
Step 2: Calculate the moles of salicylic acid
Moles of salicylic acid = mass / molar mass = 1.23 g / 138.12 g/mol = 0.0089 mol
Step 3: Use the balanced equation to find the moles of aspirin produced
According to the balanced equation: 1 mol of acetic anhydride reacts with 1 mol of salicylic acid to produce 1 mol of aspirin
Since the moles of acetic anhydride and salicylic acid are the same, the moles of aspirin produced = 0.0089 mol
Step 4: Calculate the theoretical yield of aspirin in grams
The molar mass of aspirin is 180.16 g/mol
Theoretical yield of aspirin = moles of aspirin × molar mass of aspirin = 0.0089 mol × 180.16 g/mol = 1.61 g
Step 5: Calculate the percent yield of aspirin
Percent yield = (actual yield / theoretical yield) × 100
Percent yield = (1.24 g / 1.61 g) × 100 = 77.0%
Learn more about Determining theoretical yield and percent yield of a chemical reaction here:
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B.) melting ice
C.) condensing steam
D.) dissolving ammonium nitrate in water
Answers
Answer:
C.) condensing steam
Explanation:
Exothermic reactions are chemical reaction which energy is released to the environment in the form of heat . The overall energy of the reactant is greater than the energy of the product. The higher in energy of the reactant causes a release of heat to the environment. In exothermic reactions, enthalpy change is usually negative and is accompanied by the loss of energy in the form of heat or light.
Condensation is the change of water vapor to liquid . The conversion is an exothermic reaction as energy is release to the environment in the form of heat. The water vapor molecules has higher energy than liquid. The changes of water vapor to liquid causes a loss in energy of the water vapor. As the water vapor loss more energy, heat is been release to the surrounding.
All other reaction are endothermic in which heat is absorb from the environment except for condensation of steam.
The event that is an example of an exothermic reaction is condensing steam. The answer is letter C. An exothermic reaction is one in which there is a release of heat during the reaction. Dissolving sugar in water, melting ice and dissolving ammonium nitrate in water are all examples of an endothermic reaction.