Answers
0.08 gram mass of magnesium oxide will be formed.
What is mass?Mass is an intrinsic property in the mass of a body. It was the traditionally believed to the be related to the quantity of matters in the physical body, until it is discovery of the atom and particle in physics.
Mass is quantitative measure of inertia a fundamental quantity of all matters.
2Mg + O 2→2MgO
Molar mass of Mg =24 g
Molar mass of MgO =40 g
No. of moles of O2=6.022×10^20/6.022×10^23
=0.001 mole of O2
No. of moles of Mg=0.486/24
=0.02 moles of Mg
As moles of O 2
are less than 0.01, O 2
is limiting reagent and it is 0.002 moles of MgO is formed.
⇒0.002×40=0.08 g of MgO
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Related Questions
An gel ice pack getting cold after you put it in the freezer for an hour.
substance change
chemical change
elemental change
physical change
Answers
Answer:
physical change
.............
How many grams are in 2.0 moles of iron(III) carbonate?
Answers
Explanation:
1 mole is equal to 1 moles Iron(III) or 832.29538 grams, so 2 moles Iron(III) = 1664.59076 grams
what was wrong with the way the procedure was performed? select all that apply. what was wrong with the way the procedure was performed? select all that apply. the reaction was not done on ice the acids were added all at once the reaction was not performed at reflux only nitric acid should be used, no sulfuric acid
Answers
The issues with the way the procedure was performed include not performing the reaction on ice, adding the acids all at once, not performing the reaction at reflux, and using sulfuric acid when only nitric acid should be used. These issues can affect the outcome of the reaction and may lead to undesired results.
Based on the given options, there are multiple issues with the way the procedure was performed:
1. The reaction was not done on ice: Performing the reaction on ice is important in some cases to control the reaction rate and prevent unwanted side reactions. Not doing so can lead to unexpected results or low yields.
2. The acids were added all at once: Adding the acids all at once can cause a rapid and uncontrolled reaction. It is often preferable to add them slowly or in a specific order to ensure proper mixing and control of the reaction conditions.
3. The reaction was not performed at reflux: Refluxing is a technique used to maintain a constant temperature during a reaction. It involves heating the reaction mixture and condensing and returning any evaporated solvents or reagents back into the reaction vessel. Not performing the reaction at reflux can lead to variations in temperature and affect the reaction outcome.
4. Only nitric acid should be used, no sulfuric acid: The procedure specifies that only nitric acid should be used, while sulfuric acid should not be used. This could be because sulfuric acid can have adverse effects on the reaction or result in unwanted side reactions.
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the mass of an atomic number best refers to the number of
Answers
Answer:
Mass number
Explanation:
Atomic number refers to the number of protons in an atom. It’s also used to identify what element it is, as every element has a different number of protons.
a chemist dissolves of pure perchloric acid in enough water to make up of solution. calculate the ph of the solution. be sure your answer has the correct number of significant digits.
Answers
The pH of the solution is 2.46. It is important to note that the answer should have the correct number of significant digits, which in this case is three.
To calculate the pH of the solution, we need to first determine the concentration of the solution.
Concentration (M) = moles of solute (n) / volume of solution (V)Concentration of solution = 0.2500 mol / 2.500 L
= 0.100 M
Now that we have the concentration, we can calculate the pH of the solution by using the pH formula:
pH = -log [H+]
The concentration of H+ in the solution can be calculated using the ionization constant of perchloric acid.
Ka = [H+][ClO4-]/[HClO4]1.2 x 10^-2
= [H+]^2/[0.100 M]
Therefore, [H+] = 0.00347 M
Now we can substitute this value into the pH formula:
pH = -log (0.00347)
= 2.46
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whose studies on steam engine efficiency laid the groundwork for the development of the concept of entropy?
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Carnot's work attracted little attention during his lifetime, but it was later used by Rudolf Clausius and Lord Kelvin to formalize the second law of thermodynamics and define the concept of entropy.
Sadi Carnot was a French physicist who is known for his studies on the efficiency of heat engines. In 1824, he published a book called "Reflections on the Motive Power of Fire," in which he laid out the principles of thermodynamics and introduced the concept of entropy. His work was crucial in the development of the steam engine, as it helped engineers to understand how to make engines more efficient. Carnot's studies on steam engine efficiency laid the groundwork for the development of the concept of entropy, which is a measure of the disorder or randomness of a system. (C)
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What is the frequency of a photon with an energy of 4.56 × 10^-19 J?OA. 6.88 x 10^14 HzOB. 6.42 x 10^14 HzOC. 4.36 x 10^14 HzOD. 5.10 x 10^14 Hz
Answers
So,
There's an equation that we could use in order to find frequency, and it is the next one:
This equation tells us that the energy of the photon is equal to the product of the Plank constant (h), which is 6.626*10^-34 J.s, and the frequency.
In this problem, we know the value of E and the value of h, so we need to solve for v:
Therefore, the correct answer option is A.
Explain how nutrients are cycled in a food chain.
Answers
Answer:By their movement, by their wastes, and by their metabolic.
Explanation:The nutrient cycle is a system where energy and matter are transferred between living organisms and non-living parts of the environment. This occurs as animals and plants consume nutrients found in soil, and these nutrients are then released back into the environment via death and decomposition.
A nutrient cycle (or ecological recycling) is the movement and exchange of organic and inorganic matter back into the production of matter. Energy flow is a unidirectional and noncyclic pathway, whereas the movement of mineral nutrients is cyclic.
True/false? due to their size, stream gravels need a swift current to be transported, whereas sands need a current with less energy.
Answers
The given statement "Due to their size, stream gravels need a swift current can be transported, whereas sands need a current having less energy" is false. Because Stream gravels are larger and require a higher velocity of water flow or current to be transported. Sands, on the other hand, are smaller and require less energy or lower velocity to be transported.
This is due to the fact that the larger and heavier particles have more inertia and are more resistant to being moved by the water flow. As the water flow rate increases, the force of the water on the larger particles also increases, allowing them to be transported. In contrast, smaller particles like sands have less inertia and can be transported by slower currents.
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What is the molar mass of silver oxide (Ag2O)
Answers
Answer:
231.735 g/mol
Explanation:
Molecules are chemically bonded atoms that work as a unit. Should the same kind of molecule be made up of the same kind of elements? Explain your answer
Answers
Answer:
Are molecules atoms that are chemically bonded together?
Image result for Molecules are chemically bonded atoms that work as a unit. Should the same kind of molecule be made up of the same kind of elements? Explain your answer
If this interaction is such that the total energy of the system is lowered, then the atoms bond together to form a molecule. Thus, from a structural point of view, a molecule consists of an aggregation of atoms held together by valence forces. Diatomic molecules contain two atoms that are chemically bonded.
Explanation:
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Question 11
Which formula represents a hydrocarbon?
C₂H6
C₂H5OH
C₂H5Cl
C₂H6O
Answers
Answer:
C₂H6
Explanation:
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). Option A
A hydrocarbon is a compound that consists of only carbon and hydrogen atoms. It is important to identify the formula that represents a hydrocarbon among the given options:
A) C₂H6: This formula represents ethane, which is a hydrocarbon. Ethane consists of two carbon atoms bonded together with single bonds and six hydrogen atoms.
B) C₂H5OH: This formula represents ethanol, which is not a hydrocarbon. Ethanol contains a hydroxyl group (-OH), indicating the presence of oxygen in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
C) C₂H5Cl: This formula represents ethyl chloride, which is not a hydrocarbon. Ethyl chloride contains a chlorine atom (Cl) in addition to carbon and hydrogen atoms. It is a haloalkane, not a hydrocarbon.
D) C₂H6O: This formula represents ethanol, which, as mentioned before, is not a hydrocarbon. Ethanol contains an oxygen atom (O) in addition to carbon and hydrogen atoms. It is an alcohol, not a hydrocarbon.
Among the given options, the formula A) C₂H6 represents a hydrocarbon (specifically, ethane). It consists only of carbon and hydrogen atoms, making it a suitable representation of a hydrocarbon.
In summary, the formula C₂H6 (option A) represents a hydrocarbon, while the other options contain additional elements (oxygen or chlorine) that make them non-hydrocarbon compounds. Option A
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How many atoms of each element are in one molecule of the product?
Answers
Answer:
How many atoms of each element are there in one molecule of H3PO4? there are 8 atoms in total in H3PO4. there are 3 atoms of hydrogen, 1 atom of phosphorous and 4 atoms of oxygen in the one molecule of this compound, which is called hydrogen phosphate.
Answer:
brainleist plzzzzzz
Explanation:
There are 8 atoms in total in H3PO4. there are 3 atoms of hydrogen, 1 atom of phosphorous and 4 atoms of oxygen in the one molecule of this compound, which is called hydrogen phosphate
average atomic mass of zync
Answers
Answer:
The average atomic mass of zinc is 65.38 u.
Explanation:
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The bonding within the molecules or compounds directly affects its solubility. The_______ bonds within hexane, CH14. prevent the compound from being dissolved by a solvent like water , H₂O.A) shared ionicB) polar covalentC) nonpolar covalentD)Electrostatic metallic
Answers
Water is a polar substance. Polar solvents dissolve polar substances. Now, the bond between carbon and hydrogen is a covalent bond, because the electronegativity difference between these two elements is less than 1.7.
Therefore, the low solubility of hexane is due to the fact that hexane is nonpolar with covalent bonds.
Answer: C) Nonpolar covalent
Convert from moles to particles 6.02x1023 particles 1 mole Question 2. 2.7 moles of lithium Question 3. 1.8 moles of sodium chloride
Answers
Considering the definition of Avogadro's number:
the number of molecules of lithium is 1.62621×10²⁴ molecules.the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.Definition of Avogadro's numberAvogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023×10²³ particles per mole. Avogadro's number applies to any substance.
Amount of molecules in this caseYou can apply the following rule of three, considering the Avogadro's number: If 1 mole of lithium contains 6.023×10²³ molecules, 2.7 moles of lithium contains how many molecules?
amount of molecules of lithium= (6.023×10²³ molecules × 2.7 moles)÷1 mole
amount of molecules of lithium=1.62621×10²⁴ molecules
Finally, the number of molecules of lithium is 1.62621×10²⁴ molecules.
On the other hand you can apply the following rule of three, considering the Avogadro's number: If 1 mole of sodium chloride contains 6.023×10²³ molecules, 1.8 moles of sodium chloride contains how many molecules?
amount of molecules of sodium chloride= (6.023×10²³ molecules × 1.8 moles)÷1 mole
amount of molecules of sodium chloride=1.08414 ×10²⁴ molecules
Finally, the number of molecules of sodium chloride is 1.08414×10²⁴ molecules.
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1. Calculate the energy for each of the following (1 pt each): Show all your work(a) Joules needed to heat 83.5 g of water from 26.7 °C to 75 °C.
Answers
The question requires us to calculate the energy, in joules (J), necessary to heat 83.5g of water from 26.7 °C to 75°C.
The heat energy (Q) can be calculated from the mass of the sample (m), its specific heat capacity of the substance (C) and temperature variation (ΔT), as given by the following equation:
\(Q=m\times C\times\Delta T\)Since the question did not provide a value for the specific heat capacity of water, we'll adopt the value 4.182 J/g.°C. Applying the values provided by the question, we can calculate the heat energy as:
\(\begin{gathered} Q=m\times C\times\Delta T \\ Q=(83.5g)\times(4.182J/g\mathrm{}\degree C)\times(75-26.7)\degree C=(83.5g)\times(4.182J/g\degree C)\times(48.3\degree C) \\ Q=1.69\times10^4J \end{gathered}\)Therefore, the heat energy necessary to heat the amount of water given grom 26.7 to 75°C is 1.69 x 10^4 J (or 16900 J).
If you climb to the top of a ladder, you have more, less. Or the same amount of gravitational potential energy than when you are standing on the ground.
Answers
Answer:
More
Explanation:
The equation of the gravitational potential energy is \(E_p = mgh\),
If the mass and the gravitational field strength keep constant, the higher the man is more the gravitational potential energy.
Answer:
More potential energy
Explanation:
The higher you go, the more stored energy you have which make increases the effects of gravity on you
Work out the empirical formula of a compound that contains 35% of nitrogen , 5% of hydrogen and 60% of oxygen.
Answers
Answer:
\(H_5N_5O_6\)
Explanation:
Hello there!
In this case, for the determination of empirical formulas, it is firstly necessary to assume the given percentages of the constituent atoms as the masses so we can compute their moles in the formula:
\(n_N=\frac{35gN}{14.01g/mol} =2.5molN\\\\n_H=\frac{5g}{1.01 g/mol}=5molH\\\\n_O=\frac{60g}{16 g/mol} =3molO\)
Thus, we need to divide the resulting moles, by the fewest ones (those of nitrogen) in order to determine the coefficients in the formula:
\(N:\frac{2.5}{2.5}=1\\\\H:\frac{5}{2.5}=2\\\\O:\frac{3}{2.5} =1.2\)
However, we need to turn all these numbers, whole numbers, so we multiply by 5 to get:
\(H_5N_5O_6\)
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Put the sets of 3 elements in order from least metallic character to most metallic character. Help please!!
Answers
Answer:
29:Mn,V,Sr
30:Ni,Pd,Cs
31:Cr, Mo, W
32:Sn,Pb,Ti
33:F, P, As
Sorry I was in a rush so it may not be right; so check with this picture to help you out.
Some commercially available algaecides for swimming pools claim to contain 7% copper. Could the method used in this experiment to analyze for the amount of copper be adapted to determine if the 7% copper claim is correct on a 25 mL sample of algaecide? Explain in detail and include mention of any additional information that would be needed to answer this question
Answers
Answer:
Explanation:
7% copper implies 7 w/v%(weight/volume %) of copper. This implies a 100 mL algaecide arrangement contains 7 grams of copper. Henceforth we have a thought of the measure of copper that ought to be available in a given example of algaecide. Indeed, even a 1 mL algaecide test is sufficient to discover the percentage of copper in it. so a 25mL sample of algaecide must have around 1.75g of copper.Which acid/base pair will give an equivalence point that cannot be predicted solely by a general knowledge of acid and base strength
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The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.
What is an Acid and base?An Acid is a substances that is corrosive in nature and turn blue lithmus paper to red which it react with base to produce salt and water.
Acid dissolve metals.
Base is a substance that turn red lihthmus paper to blue and react with acid to produce salt and water.
Therefore, The acid/base pair that give equivalence point that Cannot be predicted by general knowledge is NaOH and HCI ONH.
The question is incomplete as the options were not given. The options were gotten from another website.
Select the correct answer below:
ONaOH and HCI ONH,
HC ONH, and CH, COOH
NaOH and Christmas, COOH
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When the fuel in a gasoline engine is burned, the energy conversion is from
A - Chemical to thermal
B - Potential to nuclear
C - Thermal to potential
D - Electrical to kinetic
Answers
Elements in Group 18 form which ion?
A. 1
B. +1
C. -1
D. 0
Answers
What are characteristics of a chemical equation?
a.Equation must contain correct formulas for reactants and products.
b.Equation must represent known facts .
c.Equation must satisfy Law of Conservation of Mass.
d.All of the above.
e.Number 1 and 3 only.
Answers
Reasoning: Correct formulas are necessary to get the correct outcome. No matter is created or destroyed, the equation must be balanced.
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2) Use the virtual lab to determine the solubility product (Ksp) for the following solids. Show all work.
(A) AgCl
(b) SrSO4
(c) Ag2CO3
(d) Sr(IO3)2
3) What is the solubility of the solids listed in question 2, in moles/Liter?
Answers
The solubility product constant (Ksp) is the equilibrium constant for a chemical reaction in which a solid substance separates into its constituent ions in water. The solubility product (Ksp) can be used to measure the maximum solubility of a compound in water.
The solubility product of a compound can be calculated by multiplying the concentrations of the ions in the solution that results from dissolving the compound in water. The solubility product of AgCl, SrSO4, Ag2CO3, and Sr(IO3)2 is determined using the virtual lab.The virtual lab was utilized to determine the solubility product (Ksp) for AgCl, SrSO4, Ag2CO3, and Sr(IO3)2. The molar concentration of each compound was determined and used to calculate the solubility product. The calculated values were as follows:
AgCl: 1.16 × 10-10SrSO4: 3.71 × 10-7Ag2CO3: 7.59 × 10-12Sr(IO3)2: 4.67 × 10-12
The solubility of the solids listed in question 2 in moles/liter is obtained by using the solubility product. The formula for calculating the solubility of a substance is given as √Ksp. Therefore, the solubility of the substances listed in question 2 in moles/liter are as follows:
AgCl: 1.08 × 10-5SrSO4: 6.10 × 10-3Ag2CO3: 8.70 × 10-6Sr(IO3)2: 6.83 × 10-6
In conclusion, the solubility product of AgCl, SrSO4, Ag2CO3, and Sr(IO3)2 is determined using the virtual lab. The solubility of the compounds in question 2 was calculated using the solubility product constant. The solubility of the substances in moles/liter was determined to be AgCl: 1.08 × 10-5, SrSO4: 6.10 × 10-3, Ag2CO3: 8.70 × 10-6, and Sr(IO3)2: 6.83 × 10-6.
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A 4 feet tall student went summing pool. He saw depth of water in pool less than 4 feet.Will he drowned.Write reason
Answers
Answer:
Question says , the height of the student = 4 feet, ... This means, if the student goes for swimming in the pool, however he does not know swimming, he will not be drowned until he is suffering from an injury or external force.
which of the following properties is typically used to identify whether a bond is polar, nonpolar, or ionic? a. atomic mass. b. electronegativity. c. atomic radius. d. ionization energy.
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plz help it is urgent
will give brainliest
it is only multiple choice q
Answers
Answer:
Q1. B
Q2. D
Q3. C
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please help meeee !!!!!!
Answers
Answer:
I'm pretty sure the answer is c but I'm sorry if I'm wrong
Answer:
the answer is b
Explanation:
The chromate ion usually consists of one chromium atom (+6 oxidation state) and four oxide atoms. The overall charge is -2.