Answers
Answer:The balanced equation of Mg(s) + 2HCl(aq) ==> MgCl2(aq) + H2(g) does NOT tell you how many moles of Mg or H2 are present. It only tells you the MOLE RATIO of the reactants and products. Thus, 1 mole Mg reacts with 2 moles HCl to produce 1 mole of hydrogen gas.
Explanation:The balanced equation of Mg(s) + 2HCl(aq) ==> MgCl2(aq) + H2(g) does NOT tell you how many moles of Mg or H2 are present. It only tells you the MOLE RATIO of the reactants and products. Thus, 1 mole Mg reacts with 2 moles HCl to produce 1 mole of hydrogen gas.
Here, the limiting reactant is Mg. The number of moles of Mg is 0.019 and that of HCl is 0.134. The number of moles of H2 produced is 0.019.
What is limiting reactant ?The limiting reactant in a reaction is the reactant which is fewer in moles and thus, determine the yield of the reaction. In the given reaction, two moles of HCl reacts with one mole of magnesium metal.
Given the mass of Mg = 0.475 g
atomic mass = 24 g/mol
no.of moles = 0.475 /24 = 0.124
volume of HCl = 0.124 L
molarity = 1.08 M
number of moles = molarity × volume = 0.134
The limiting reactant here is magnesium. One mole of Mg reacts with 2 moles of HCl giving 1 mole of hydrogen gas. Then 0.019 moles will give 0.019 moles of hydrogen gas.
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Related Questions
PLEASE URGENT ! 100 POINTS
If 16.0 g of AgNO3 react with an excess of BaCl2 according to the following equation, what mass of AgCl gets produced?
2 AgNO3+ BaCl2 → 2 AgCl +Ba(NO3)2
If only 10.0 g of AgCl were recovered, what is the percent yield of this reaction?
Answers
First, we need to determine the limiting reagent in the reaction. We have 16.0 g of AgNO3, which is:
16.0 g AgNO3 x (1 mol AgNO3/169.87 g AgNO3) = 0.0942 mol AgNO3
If we assume an excess of BaCl2, we can calculate the maximum amount of AgCl that can be produced:
0.0942 mol AgNO3 x (2 mol AgCl/2 mol AgNO3) x (143.32 g AgCl/1 mol AgCl) = 26.99 g AgCl (theoretical yield)
However, only 10.0 g of AgCl were recovered. We can calculate the percent yield of the reaction as follows:
Percent yield = (actual yield/theoretical yield) x 100%
Percent yield = (10.0 g AgCl/26.99 g AgCl) x 100% = 37.05%
Therefore, the percent yield of the reaction is 37.05%.
Where is the moon located in a eclipse season
Answers
Answer:
During the eclipse season, the Moon is at a low ecliptic latitude (less than around 1.5° north or south), hence the Sun, Moon, and Earth become aligned straight enough (in syzygy) for an eclipse to occur.
Explanation:
Starting with 0.3500 mol CO(g) and 0.05500 mol COCl2(g) in a 3.050 L flask at 668 K, how many moles of CI2(g) will be present at equilibrium?
CO(g) + Cl2(g)》COCl2(g)
Kc= 1.2 x 10^3 at 668 K
Answers
At equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
1: Write the balanced chemical equation:
\(C_O\)(g) + \(Cl_2\)(g) ⟶ \(C_OCl_2\)(g)
2: Set up an ICE table to track the changes in moles of the substances involved in the reaction.
Initial:
\(C_O\)(g) = 0.3500 mol
\(Cl_2\)(g) = 0.05500 mol
\(C_OCl_2\)(g) = 0 mol
Change:
\(C_O\)(g) = -x
\(Cl_2\)(g) = -x
\(C_OCl_2\)(g) = +x
Equilibrium:
\(C_O\)(g) = 0.3500 - x mol
\(Cl_2\)(g) = 0.05500 - x mol
\(C_OCl_2\)(g) = x mol
3: Write the expression for the equilibrium constant (Kc) using the concentrations of the species involved:
Kc = [\(C_OCl_2\)(g)] / [\(C_O\)(g)] * [\(Cl_2\)(g)]
4: Substitute the given equilibrium constant (Kc) value into the expression:
1.2 x \(10^3\) = x / (0.3500 - x) * (0.05500 - x)
5: Solve the equation for x. Rearrange the equation to obtain a quadratic equation:
1.2 x \(10^3\) * (0.3500 - x) * (0.05500 - x) = x
6: Simplify and solve the quadratic equation. This can be done by multiplying out the terms, rearranging the equation to standard quadratic form, and then using the quadratic formula.
7: After solving the quadratic equation, you will find two possible values for x. However, since the number of moles cannot be negative, we discard the negative solution.
8: The positive value of x represents the number of moles of \(Cl_2\)(g) at equilibrium. Substitute the value of x into the expression for \(Cl_2\)(g):
\(Cl_2\)(g) = 0.05500 - x
9: Calculate the value of \(Cl_2\)(g) at equilibrium:
\(Cl_2\)(g) = 0.05500 - x
\(Cl_2\)(g) = 0.05500 - (positive value of x)
10: Calculate the final value of \(Cl_2\) (g) at equilibrium to get the answer.
Therefore, at equilibrium, the number of moles of \(Cl_2\) (g) will be 0.2025 mol.
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Anyone know how to solve this?
Answers
The ratio of the concentrations at equilibrium is as follows:
3.7 0.85 0.04 21.3 42.6 12212.92 0.81 0.11 7.4 14.8 6012.2 0.63 0.43 1.5 3 274What are reactions in equilibrium?Chemical equilibrium is the point in a chemical reaction where both the forward and backward processes are occurring at the same rate.
The concentrations of the reactants and products are constant at equilibrium because the forward and reverse speeds are equal.
Considering the given statements based on the reaction equilibrium concentrations, the correct options are:
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Given the data you collected for the volume of water displaced by 25.000 g of aluminum, what is the density of aluminum?
A. 3.38 g/cm
B. 13.5 g/mL
C. 2.70 g/cm
D. 0.637 g/mL
Answers
Answer:
C. 2.70 g/mL
Explanation:
Density is the ratio between the mass of a substance and the volume it occupies. Based on Archimedes' volume, the displaced volume of the aluminium is the volume it occupies. To solve this question we must find the difference in volume between initial volume of water = 30mL and final volume of water + aluminium = 39.26mL. This difference is the volume of the aluminium. With its mass we can find density:
39.26mL - 30mL = 9.26mL
Density = 25.00g / 9.26mL =
2.70g/mL
Right answer is:
C. 2.70 g/mLTestbank, Question 143 A compound with molecular formula C8H14O4 exhibits a triplet at δ 1.3 (6H), a singlet at δ 2.6 (4H) and a quartet at δ 4.2 (4H) in its 1H NMR spectrum. Its IR spectrum shows a strong absorption band near 1740 cm-1. What is the structure for this compound
Answers
Answer: fun fact an apple onion and potatoe all taste the same if you plug your nose
Explanation:
A mystery element has 18 protons. Which one of the following statements is true about the element?
o
A. The element belongs in row 2 of the periodic table and is classified as a halogen.
O
B. The element belongs in row 3 of the periodic table and is classified as a noble gas.
O
C. The element belongs in row 4 of the periodic table and is classified as an alkali metal.
D. The element belongs in row 5 of the periodic table and is classified as an alkaline earth metal.
Answers
Answer:
B
Explanation:
Elements in a group are determined by the number of valence electrons
Elements in a period are determined by the number of electrons shell
The electronic configuration of the element is
2,8,8
the number of valence electron is 8 that means it is in Group 8/O
the number of electron shell is 3 that means it is in period (row) 3
Group 8/O elements are called Noble gases
Does the magnetic field lines of repelling magnets always combine. True or False?
Answers
Answer:
True
Explanation:
yes magnetic feild lines is always combined
what part of the product label describes the hazardous effects of a chemical
Answers
The part of the product label that describes the hazardous effects of a chemical is the hazard statement.
The hazard statement describes the potential health and environmental risks associated with using or coming into contact with the chemical.
It typically includes information about the severity of the hazard, the type of route of exposure (skin, inhalation, oral, etc.), the symptoms of exposure, and the necessary protective measures to be taken.
For example, a product label may contain a hazard statement such as “Harmful if swallowed. May cause respiratory irritation. Avoid contact with eyes and skin. Wear suitable protective clothing”.
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2. What is an example of an object that affects gravity on Earth?
Answers
Answer:
The moon
Explanation:
The moon pulls on the earth, causing the tides to raise as the water is being pulled by the moon.
If 450 grams of dextrose are dissolved in 650ml Of water with a resultant volume of 1 liter what is the percent concentration (w/v) of dextrose
Answers
Considering the definition of mass volume percentage, the percent concentration of dextrose is 45%.
Mass volume percentageMass volume percentage (% m/V) is a measure of concentration that indicates the number of grams of solute per 100 volume units of the solution. In other words, the volume percent of a component in the solution is defined as the ratio of the mass of the component to the volume of the solution, expressed as a percentage.
The mass volume percentage of a solution is determined by the following expression:
\(Mass volume percentage=\frac{mass of solute}{volume of solution}x100\)
Percent concentration in this caseIn this case, you know:
mass of solute= 450 gramsvolume of solution= 1 L= 1000 mLReplacing in the definition of mass volume percentage:
\(Mass volume percentage=\frac{450 grams}{1000 mL}x100\)
Solving:
mass volume percentage= 45%
Finally, the percent concentration of dextrose is 45%.
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A sample of carbon atoms were chemically combined with a sample of oxygen atoms to yield the compound carbon dioxide. The sample of oxygen atoms was artificially manufactured to have a 3:1 ratio of
Answers
Answer:
The law companies that value excessive ethics comply with the legal guidelines
Attractive forces between molecules in a solid are ______ than bonds between atoms in a molecule.
Answers
Answer:
Stronger
Explanation:
Attractive forces between molecules in a solid are weaker than bonds between atoms in a molecule.
What do you mean by attractive forces in solid?Solid is a state of matter in which the force of attraction between the particles is very high and the space between the particles is negligible. Solids are hard and have fixed shape, size, and volume .
Due to high stiffness and toughness with less intermolecular force in solid the attractive force in solids are very high.
Hence, attractive forces between molecules in a solid are weaker than bonds between atoms in a molecule.
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Which part of a seed plant develops into sperm cells? o embryo pollen 0 seed O xylem
Answers
Answer:
Pollen
Explanation:
bc i take notes and also my sister studies bio
PLZ GIMME BRAINLIEST
Answer:
correct
Explanation:
melting point is defined as
Answers
Explanation:
The temperature which a given solid will melt
Answer:
the temperature at which a given solid will melt.
Explanation:
I don't know how to Explain it. (lol)
For the substances we will test in this experiment, use your knowledge of these substances to make a prediction about which ones you think will be strong electrolytes, weak electrolytes, or non-electrolytes. Be sure to indicate a rationale for your choices.
1. distilled water
2. sodium chloride solution
3. glycerol solution
4. acetic acid solution
5. calcium chloride solution
6. sucrose solution
7. hydrochloric acid solution
8. ethanol solution
9. simulated urine solution
Answers
Distilled water - Non-electrolyte. Distilled water is a pure substance and does not contain any ionic compounds or free ions.
Sodium chloride solution - Strong electrolyte. Sodium chloride is an ionic compound that dissociates completely into its constituent ions when dissolved in water.
Glycerol solution - Non-electrolyte. Glycerol is a molecular compound and does not dissociate into ions when dissolved in water.
Acetic acid solution - Weak electrolyte. Acetic acid is a weak acid that dissociates only partially into its constituent ions when dissolved in water.
Calcium chloride solution - Strong electrolyte. Calcium chloride is an ionic compound that dissociates completely into its constituent ions when dissolved in water.
Sucrose solution - Non-electrolyte. Sucrose is a molecular compound and does not dissociate into ions when dissolved in water.
Hydrochloric acid solution - Strong electrolyte. Hydrochloric acid is a strong acid that dissociates completely into its constituent ions when dissolved in water.
Ethanol solution - Non-electrolyte. Ethanol is a molecular compound and does not dissociate into ions when dissolved in water.
Simulated urine solution - This will depend on the specific composition of the simulated urine solution. However, urine typically contains a variety of dissolved ions and compounds, including electrolytes like sodium and potassium ions. Therefore, I would predict that simulated urine solution is likely to be a strong electrolyte.
The resistance in a circuit is halved. What happens to the voltage?
V=IR
The voltage remains the same.
The voltage is halved.
The voltage is doubled.
]
The voltage is increased by a factor of 4.
Answers
When the resistance in a circuit is halved, the voltage increases by a factor of 4. This relationship is known as Ohm's law, which states that voltage (V) is equal to current (I) multiplied by resistance (R) in a circuit, or V = I x R.
If the resistance in a circuit is halved, then R in Ohm's law is divided by 2, which means that the voltage (V) across the circuit increases by a factor of 2, assuming that the current (I) remains constant.
However, the current (I) in the circuit may also change if the resistance is altered. If the voltage source remains constant and the resistance is halved, then the current (I) will double, as per Ohm's law. Therefore, the voltage (V) across the circuit will increase by a factor of 2 x 2 = 4, which is four times its original value.
This is because the current in the circuit also changes when the resistance is altered, according to Ohm's law.
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Which of the following balanced reactions does not have at least one 6 as a coefficient?
Responses
H3PO4 + Ba(OH)2 → Ba3(PO4)2 + H2O
H, 3, PO, 4, + Ba(OH), 2, → Ba, 3, (PO, 4, ), 2, + H, 2, O
H2SO4 + Al(OH)3 → Al2(SO4)3 + H2O
H, 2, SO, 4, + Al(OH), 3, → Al, 2, (SO, 4, ), 3, + H, 2, O
C6H12O6 + O2 → CO2 + H2O
C, 6, H, 12, O, 6, + O, 2, → CO, 2, + H, 2, O
C2H2 + O2 → CO2 + H2O
Answers
The following balanced reactions does not have at least one 6 as a coefficient : C₂H₂ + O₂ -----> CO₂ + H₂O
The balanced reaction are as follows :
1) The given reaction is :
H₃PO₄ + Ba(OH)₂ ---> Ba₃(PO₄)₂ + H₂O
balanced reaction is :
2H₃PO₄ + 3Ba(OH)₂ ---> Ba₃(PO₄)₂ + 6H₂O
2) The given reaction is :
H₂SO₄ + Al(OH)₃ ----> Al₂(SO₄)₃ + H₂O
balanced reaction is:
3H₂SO₄ + 2Al(OH)₃ ----> Al₂(SO₄)₃ + 6H₂O
3) The given reaction is :
C₆H₁₂O₆ + O₂ ----> CO₂ + H₂O
balanced reaction is given as :
C₆H₁₂O₆ + 6O₂ ----> 6CO₂ + 6H₂O
4) The given reaction is as follows :
C₂H₂ + O ----> CO₂ + H₂O
balanced reaction is given as follows :
2C₂H₂ + 5O ----> 4CO₂ + 2H₂O
Thus, The following balanced reactions does not have at least one 6 as a coefficient : C₂H₂ + O₂ -----> CO₂ + H₂O
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Write a conversion factor that converts between moles of calcium ions in calcium phosphide, Ca3P2, and moles of Ca3P2.
Answers
The conversion factor between moles of calcium ion and moles of \(Ca_3P_2\) in \(Ca_3P_2\) would be 3 to 1.
Mole fraction\(Ca_3P_2\) if formed from 3 carbon atoms and 3 phosphate atoms according to the equation:
\(3Ca + 2P --- > Ca_3P_2\)
Thus, there are 3 moles of calcium in every 1 mole of \(Ca_3P_2\).
The conversion factor between moles of calcium and moles of \(Ca_3P_2\) will. therefore, be 3 to 1 or simply 3:1.
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What is the new molarity if 55.0mL of water is added 25.0mL of 0.119M
NaCl solution.
Answers
Answer: 0.04M.
Explanation: Using M1V1=M2V2, we can find the new molarity (M2).
We are given M1 and V1 with 0.119M and 25mL, we are also given V2 since it says we added 55mL to the original 25mL.
25mL+55mL = 80mL.
Let's convert mL to L by dividing by 1000.
V1 = 25ml/1000 = 0.025L
V2 = 80mL/1000 = 0.08L.
Now plug in and solve algebraically.
0.119 * 0.025 = M2 * 0.08. Divide both sides by 0.08.
\(\frac{0.119*0.025}{0.08}\) = 0.037.
M2 = 0.037M
However, since we are given 25mL which only has 2 sig figs, the new molarity os 0.04M.
question is in the image.
Answers
The atomic mass of Sulphur is 80.1 amu ≈ 80 amu.
What is an atomic mass?Atomic mass, also known as average mass in a bunch of atoms, is the total mass of the protons, neutrons, and electrons that make up an atom. However, because they are so much lighter than protons and neutrons, electrons are not taken into account in the computation. The mass of protons and neutrons together make up the atomic mass.
What is the sulfur trioxide's atomic mass?The mass of the elements present in the compound determines the percentage composition.
Sulfur mass equals 32.1 amu given
Oxygen mass = 16.0 amu
Sulfur trioxide mass is 32.1 + 3 × 16.0 = 80.1 amu.
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The sum of three numbers is 68. The first number is 7 less than the second. The third number is 3 times the second. What are the numbers ?
Answers
Answer:
8,15 and 45 respectively
Explanation:
let x be the second number
x-7 = the first number
3x= the third number
x-7+x+3x=68
5x-7=68+7
5x=68+7
5x=75
divide both side by 5
x=15
Help PLLSSSSS? :)
Which lens do you first use when looking through the microscope?
Answers
Answer:
low power objective lens
Explanation:
b/c the stage could hit the high power objective and easily dissenter the specimen
What do families/groups have in common
Answers
Answer:
The vertical columns on the periodic table are called groups or families because of their similar chemical behavior. All the members of a family of elements have the same number of valence electrons and similar chemical properties. The horizontal rows on the periodic table are called periods.
Answer:
people
tee hee
but really they have the same number of valence electrons. Also they have similar chemical properties.
Explanation:
Hope this helped boo, lemme know if you need more info :)
Is crumbling sheet of paper physical or chemical change and why! Pls help fast!!!! :((
Answers
Answer:
Chemical
Explanation:
physical, because chemicl would be if it was disolving with water
Draw the structural formula for CH2CONHCH3 and what its functional group
Answers
Answer:
The structural formula of CH2CONHCH3 is attached below -:
and the functional group of CH2CONHCH3 is - Amide
Explanation:
The IUPAC name of CH2CONHCH3 is -: N-methyl ethenamide .
ABOUT AMIDE FUNCTIONAL GROUP -: In organic chemistry, an amide, also known as an organic amide or a carboxamide, is a compound with the general formula RC(= O) NR 'R' where R, R 'and R' represent hydrogen organic groups or atoms. When it is part of the main protein chain, the amide group is referred to as a peptide bond and isopeptide bond when it appears in a side chain, such as asparagine and glutamine in the amino acids.
The structural formula shows the arrangement of atoms and groups in a compound.
A chemical compound is composed of atoms of elements. There are three structures that could be written for a chemical substance. These are;
Empirical formulaMolecular formulaStructural formulaThe structural formula of a compound shows the arrangement of atoms and groups in the compound in space. The structural formula of the compound CH2CONHCH3 has been shown in the image attached. The following functional groups are present in the compound;
AlkyneKetoneAmineLearn more: https://brainly.com/question/946875
PLZ ANSWER QUICK I AM IN TIMER HELP WILL GIVE BRAINLIEST
Which is greater, the moon's period of rotation or its period of revolution?
They are equal.
the moon's revolution period around Earth
Neither are known.
the moon's rotational period
Answers
Answer:
B
Explanation:
Determine the compound type for the following formulas: C12H22011 Mg(OH)2 H20 Cu3Zn2 Au
Answers
Answer:
C12H22O11
✔ covalent
Mg(OH)2
✔ Ionic
H2O
✔ covalent
Cu3Zn2
✔ metallic
Au
✔ metallic
Explanation:
C12H22O11 ✔ covalent
Mg(OH)2 ✔ Ionic
H2O ✔ covalent
Cu3Zn2 ✔ metallic
Au ✔ metallic
Please help with Question 1 :How many grams of Na2S will be produced if you react 35.0 g sodiumQuestion 2 Aluminum metal has a specific heat of 0.900 j/g•°c. calculate the amount of heat required to raise the temperature of 10.5 moles of al from 30.5 °c to 225°c. a) 1.84 kjb. 2.41 kjc. 65.1 kjd. 49.6 kje. 57.3 kj
Answers
Na2S will be formed from the chemical reaction below :
\(2Na\text{ +S }\Rightarrow\text{ Na}_2S\)We are given :
• Mass of Na = 35.0 g rams
,• Molar mass Na = 22,989769 g/mol
(1) Calculate moles Na \(\begin{gathered} Moles\text{ Na =}\frac{Mass\text{ }}{Molecular\text{ mass }} \\ \text{ = }\frac{35\text{ g }}{22.989769g.mol^{-1}} \\ \text{ }\therefore\text{ Moles Na =1.522 moles of Sodium } \end{gathered}\)(2) From stoichiometry, the balanced equation informs us that :2 mole Na will produce 1 mole Na2S
Then , 1.522 moles Na will produce X moles Na2S
Therefore, X moles Na2S = (1.522mole Na * 1 mole Na2S)/ 2 moles Na
=0.761 moles on Na2S will be produced .
(3) Calculate Mass of Na2S
• Molecular mass Na2S = 78,0452 g/mol
\(\begin{gathered} Mass\text{ Na}_2S\text{ = Molecular mass Na}_2S\text{ * moles Na}_2S \\ \text{ = 78.0452g/mol *0.761 moles } \\ \text{ =59.41 grams } \end{gathered}\)This means that 59.41 grams of Na2S will be produced from 35 g Na.Which of the equations are endothermic and which are exothermic?
Write a two to four sentence conclusion statement explaining how the potential energy diagram is used to identify if the reaction is endothermic or exothermic, if heat was released or absorbed, and why the sign of enthalpy change was positive of negative. There should be a conclusion statement for each graph
Answers
Based on the potential energy diagram and the potential energies of reactant and product the synthesis and double replacement reactions are endothermic. The single replacement reaction is exothermic and the ΔH is negative.
What are the differences between endothermic and exothermic reactions ?Chemical processes referred to as endothermic reactions occur when the reactants take in heat energy from their environment to create products. The reaction absorbs energy from its surroundings. The energy that manifests as heat. Examples include cooking, evaporation, gas molecules, melting of ice, and photosynthesis.
An exothermic reaction is one in which energy is given off as heat or light. The mechanism releases energy into its surroundings. Energy can be emitted as sound, light, heat, or electricity. Examples include rusting iron, settling, chemical bonds, explosions, and nuclear fission.
How the potential energy diagram is used to identify if the reaction is endothermic or exothermic?
A potential energy diagram, also known as a reaction progress curve, is a visual representation of the energy changes that take place during a chemical reaction. A diagram of potential energy illustrates how a system's potential energy changes as reactants are changed into products. Note that an exothermic reaction results in a negative enthalpy change while an endothermic reaction exhibits a positive enthalpy change. The diagrams of potential energy show this. When the system absorbs energy from its environment, its overall potential energy rises for the endothermic reaction. As the system undergoes the exothermic process, the system's overall potential energy declines.
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