Which equation represents a decomposition reaction?(1) CaCO3(s) ==>CaO(s) + CO2(g)
(2) Cu(s) + 2AgNO3(aq) ==>2Ag(s) + Cu(NO3)2(aq)
(3) 2H2(g) + O2(g) ==>2H2O(l)
(4) KOH(aq) + HCl(aq) ==>KCl(aq) + H2O(l)
Answers
Answer : The correct option is, (1)
Explanation :
The option (1) reaction is an example of decomposition reaction because in this reaction the larger compound, calcium carbonate decomposes into smaller molecule, calcium oxide and carbon dioxide.
Decomposition reaction : It is a type of reaction in which a larger compound decomposes into a smaller molecule or elements.
The option (2) reaction is an example of single displacement reaction because in this reaction the most reactive metal, copper displace the less reaction metal, silver.
The option (3) reaction is an example of combination reaction because in this reaction two reactants, hydrogen and oxygen react to give a single product as water.
The option (4) reaction is an example of double displacement reaction because in this reaction a positive cation and a negative anion of two reactants exchange their places to give two new products.
Hence, the correct option is, (1)
CaCO3(s) ==>CaO(s) + CO2(g)
hope this helps!.
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What is special about nitrogen? and what is it main function?
What is the equilibrium concentration of N2O4 if the equilibrium concentration of NO2 is 0.785 M?
Answers
Kc = [ NO₂ ]² / [ N₂O₄ ]
4.2 = [ 0.785 ] [ N₂O₄ ]
[ N₂O₄ ] = 4.2 / 0.785
[N₂O₄ ] = 5.350 M
hope this helps!
Answers
When 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C, approximately 36.78 liters of oxygen gas are produced according to the ideal gas law.
What volume of oxygen gas is produced at a pressure of 1.0 atm and a temperature of 23 °C?
To find the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at a pressure of 1.0 atm and a temperature of 23°C, you can use the ideal gas law:
PV = nRT
Where:
- P is the pressure (1.0 atm).
- V is the volume (what we want to find).
- n is the number of moles of gas (1.5 moles of O2 since 1 mole of O2 is produced for every 2 moles of H2O2).
- R is the ideal gas constant (approximately 0.0821 L.atm/mol.K).
- T is the temperature in Kelvin (23°C needs to be converted to Kelvin, which is 296.15 K).
First, calculate the number of moles of O2 produced:
n = 3.0 moles of H2O2 * (1 mole of O2 / 2 moles of H2O2) = 1.5 moles of O2
Now, plug in the values into the ideal gas law and solve for V:
1.0 atm * V = 1.5 moles * 0.0821 L·atm/mol·K * 296.15 K
Now, calculate the volume:
V = (1.5 moles * 0.0821 L·atm/mol·K * 296.15 K) / 1.0 atm
Calculate the volume:
V ≈ 36.78 L
So, the volume of oxygen gas produced when 3.0 moles of hydrogen peroxide decompose at 1.0 atm and 23°C is approximately 36.78 liters.
Learn more on ideal gas law here;
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you you need to you the ideal gas law (PV=nRT) to find the volume of gas produced. V=nRT/P
n=1.5mol
R=0.08206atmL/molK
T=23°C (turn that into 296K)
P=1atm
V=(1.5molx0.08206atmL/molK)/1atm
V=0.1231L
I hope this helps.
2) C6H12O6
3) N2
4) O2
Answers
Answer:
Explanation:
We have to keep in mind that a good conductor would be a substance that has the ability to produce ions (charged species). These species are responsible for the electricity conduction on water.
Therefore, we have to check which ones of these compounds will produce ions in water. For and
we have diatomic molecules (also gases) this type of molecules don't have the ability to produce ions due to his simplicity, they already are very stable.
In the sugar molecule we have a covalent compound. The ions are produced by ionic compounds. So, this molecule can be discarded too.
For we have an ionic compound that have the ability to produce ions:
So, this is the compound that would be a good conductor due to the and the
ions.
Answers
33.6 liters* 1mol/22.4liters = 1.5 mols.
Molar mass of carbon dioxide: 12 g/mol + 2x16 g/mol = 44 g/mol
Mass of 1.5 mols = 1.5mol * 44 g/mol = 66 g.
double in number
stay the same
triple in number
Answers
The size of the herbivore population is decreased if the producer population decreased. Therefore, option A is correct.
What would happen if the population of herbivores increases?
Large population of herbivores will overgraze. Therefore, all plants will vanish from the earth surface and ultimately the earth may become a desert.
Producers are organisms that produce their own food via a process known as photosynthesis, such as plants. Herbivores are organisms that eat producers. Herbivores include rabbits, giraffes, and other animals.
An increase in producer population corresponds to an increase in herbivore population, whereas a decrease in producer population corresponds to a decrease in herbivore population.
Thus, If the size of the producer population decreases, so will the size of the herbivore population.
To learn more about the herbivore population, follow the link;
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Answer;
-Decrease
if the producer population decreased then the size of the herbivore population will consequently decrease.
Explanation;
Producersare organisms that make make their own food through a process known as photosynthesis, e.g. plants such as grasses. Herbivores are the organisms which feed on producers. Examples of herbivores are rabbits, giraffes etc.
-An increase in producer population means that there will be a a corresponding increase in the population of herbivores while a decrease in the size of producers will cause a decrease in the population of herbivores.
Answers
v=300 ml=0.3 l
c=4 mol/l
n(HCl)=vc
m(H₂)/M(H₂)=n(HCl)/2
m(H₂)=M(H₂)vc/2
m(H₂)=2.0g/mol·0.3 l · 4mol/l /2 = 1.2 g
1.2 grams of hydrogen gas will be produced