Explanation:
Let the mass of the compound be 100g.
There are 60.2g of sulfur.
Moles of sulfur
= 60.2g / (32.07g/mol) = 1.877mol
There are 100g - 60.2g
= 39.8g of manganese.
Moles of manganese
= 39.8g / (54.94g/mol) = 0.724mol
Mole ratio of manganese to sulfur
= 0.724mol : 1.877mol = 1 : 2.5.
A student working in the laboratory produces 6.81 grams of calcium oxide, CaO, from 20.7 grams of calcium
carbonate, CaCO3, according to the reaction CaCO3 → CaO + CO2. Calculate the theoretical yield and
the percent yield for the reaction. Show and/or explain your work.
Answer:
A. Theoretical yield of CaO is 11.59 g
B. Percentage yield of CaO = 58.76%
Explanation:
The following data were obtained from the question:
Mass of CaCO₃ = 20.7 g
Actual yield of CaO = 6.81 g
Theoretical yield of CaO =?
Percentage yield of CaO =?
The equation for the reaction is given below:
CaCO₃ —> CaO + CO₂
Next, we shall determine the mass of CaCO₃ that decomposed and the mass of CaO produced from the balanced equation. This can be obtained as follow:
Molar mass of CaCO₃ = 40 + 12 + (3×16)
= 40 + 12 + 48
= 100 g/mol
Mass of CaCO₃ from the balanced equation = 1 × 100 = 100 g
Molar mass of CaO = 40 + 16 = 56 g/mol
Mass of CaO from the balanced equation = 1 × 56 = 56 g
SUMMARY:
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
A. Determination of the theoretical yield of CaO.
From the balanced equation above,
100 g of CaCO₃ decomposed to produce 56 g of CaO.
Therefore, 20.7 g of CaCO₃ will decompose to produce =
(20.7 × 56)/100 = 11.59 g of CaO.
Thus, the theoretical yield of CaO is 11.59 g
B. Determination of the percentage yield.
Actual yield of CaO = 6.81 g
Theoretical yield of CaO = 11.59 g
Percentage yield of CaO =?
Percentage yield = Actual yield /Theoretical yield × 100
Percentage yield = 6.81/11.59 × 100
Percentage yield of CaO = 58.76%
what three things might influence a slide when conditions are right?
Answer:
3
Explanation:
The three things that can affect a condition to enforce a slide is friction, weight, and slope of an area. Solutions that can make flow easily are those that can create less friction depending on the condition of an environment where it is present.
1. What are the two effects of the continental plate/continental plate convergent boundary?
2. Where can you find an example of this type of divergent boundary? Which country, continent or ocean?
Answer
oh you again?
Explanation:
Sns
Station 5
Find the formula for the following
compounds:
Chromium (II) Oxide
Chromium (III) Oxide
Lead (II) Phosphide
Mercury (0) Sulfide
Manganese (11) Nitride
A mixture is made by combining 1.61 lb of salt and 5.37 lb of water. What is the percentage of salt (by mass) in this mixture?
Answer:
Hey okau
Explanation:
X/100% = part / whole
X/100% = 1.62 / (1.62 + 4.81) = 0.252
X = 25.2%
Assuming that only the listed gases are present, what would be the mole fraction of oxygen gas be for each of the following situations?
A gas sample of 2.31 atm of oxygen gas and 3.75 atm of hydrogen gas that react to form water vapor. Assume the volume of the container and the temperature inside the container does not change.
The mole fraction of oxygen gas : 0.381
Further explanationGiven
2.31 atm Oxygen
3.75 atm Hydrogen
Required
The mole fraction of Oxygen
Solution
Dalton Law's of partial pressure
P tot = P₁ + P₂ + ..Pₙ
Input the value :
P tot = P O₂ + P H₂
P tot = 2.31 atm + 3.75 atm
P tot = 6.06 atm
The mole fraction of O₂ (X O₂):
P O₂ = X O₂ x P tot
X O₂ = P O₂ / P tot
X O₂ = 2.31 /6.06
X O₂ = 0.381
The mole fraction of oxygen gas in the given mixture of oxygen and hydrogen gas is 0.381.
How do we calculate mole fraction?If the details is present in terms of partial pressure then by using the below equation, we can calculate the mole fraction as:
p = (x)(P), where
p = partial pressure
P = total pressure
x = mole fraction
Total pressure of the mixture will be calculated by adding the partial pressure of oxygen and hydrogen gases as:
P = 2.31 + 3.75 = 6.06 atm
Now mole fraction of oxygen will be calculated as:
x = 2.31 / 6.06 = 0.381
Hence mole fraction of oxygen is 0.381.
To know more about mole fraction, visit the below link:
https://brainly.com/question/1553736
An increase in aurora activity on Earth could be related to what activity on the Sun?
O A decrease in prominence
B decrease in solar Fares
Oc decrease in speed of solar wind
D increase in speed of solar wind
E increase in sun spots
Answer:
D.
Explanation:
INCREASE OF SOLAR WINDS When the sun is more active
Copper metal reacts with silver nitrate to produce silver metal and copper (II) nitrate.
the correct equation for this reaction is:
A: Cu + SiN—> Si + Cu2N
B: 2Cu + AgNO3–> Ag +
Cu(NO3)2
C: Cu + 2 AgNO3–> Ag + Cu(NO3)2
D:Cu + AgNO3–> Ag + CuNO3
Answer:
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
Explanation:
The reactants are:
Copper metal = Cu
Silver nitrate = AgNO₃
The products are:
Silver metal = Ag
Copper (II) nitrate = Cu(NO₃)₂
So, the reaction equation is given as;
Cu + 2AgNO₃ → 2Ag + Cu(NO₃)₂
This is a single displacement reaction
What is the measure of the amount of dissolved salts in ocean water?
Answer:
Salinity
HOPE THIS HELPS! :)
Explanation:
What is the relationship between the mass of the boat and the mass of the displaced
liquid?
The mass of the boat is equal to the mass of the liquid which is displaced by placing the boat in the liquid.
What is Archimedes' Principle?
Archimedes' Principle states that the buoyant force of the object is equal to the weight of the water which is displaced by the boat. If the weight of the water that is displaced by the boat is less than that of the weight of the boat, then in this case the boat sinks. Archimedes' principle or the buoyant force is very useful for the calculation of the volume of an object that does not have a regular shape.
The mass of the displaced liquid is always equal to the volume of the liquid multiplied by the density of the fluid. When a boat is placed in the water, the volume of displaced water is equal to the mass of the boat which is placed in it.
Learn more about Displacement here:
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how does the disturbance travel through the coil when you move your arm back and forth?
Answer:
The waves travel in a direction parallel to direction of the vibration of the medium
The waves travel in a direction parallel to direction of the vibration of the medium
what is mechanical wave ?A mechanical wave is defined as an oscillation of matter which is responsible for energy transfer via medium.
The propagation of wave is limited by the medium of transmission, the oscillating material which revolve around a fixed point with little translational motion.
A surface wave which is an example of mechanical wave that propagate along the interface of two different media in physics. other common examples are Gravity waves on the surface of liquids, ocean waves.
Surface wave can be propagated in a slow way through Earth material and are generally lower in frequency than body waves.
For more details regarding wave, visit
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Which compound has the greatest molecular mass?
CO2
H2O
Pb2
NH4
write few lines about luis braille
Answer:
Louis braille was a french educator and inventor of a sytem of reading and writing for use use by the blind or visually impaired . his system remains virtually unchanged to this day and is know worldwide simply as braille
Complete the chemical equation and name the type of reaction taking place.
In the problem below, the ions have the following charges: Γ-2 and φ-2
H2Γ + φ(OH)2 -->
PLEASE HELP
in a double replacement reaction cesium chloride reacts with silver nitrate to produce silver chloride and
a cacl
b cs(no3)2
c agcs
d csno3
Answer:
CsNO₃
Explanation:
The reactants are:
Cesium chloride = CsCl
Silver nitrate = AgNO₃
Products:
Silver chloride = AgCl
The other product:
Now;
CsCl + AgNO₃ → AgCl + ?
The other product is CsNO₃
So;
CsCl + AgNO₃ → AgCl + CsNO₃
Construct an explanation using Newton's Laws of Motion to describe the effects of balanced and unbalanced forces on the motion of an object.
Answer:
The manner in which objects will move is determined by the answer to this question. Unbalanced forces will cause objects to change their state of motion
Explanation:
Since these two forces are of equal magnitude and in opposite directions, they balance each other.
Answer:
balance force are those force whose resultant force is zero and unbalanced force are those whose resultant are non zero
Why do different places on Earth have different climates?
Answer:
cause of the sun rotation
Explanation:
Answer:
The world is tilting on an edge that creates seasons.
Explanation:
And that's why different parts of the have different climates.
Which of the below elements are part of a group? Feel free to use the periodic table.
A. H, He, O, C
B. Be, Mg, Ca, Sr
C. Li, Be, C, O
D. H, Li, Na, Mg
Answer:
B. Be, Mg, Ca, Sr
Explanation:
Be, Mg, Ca, Sr are parts of the alkaline Earth metal family/group. So they are the second most reactive elements following behind alkali metals. Furthermore, Be, Mg, Ca, Sr all have 2 valence electrons that lose them to form cations. They have low melting points, low boiling points, can conduct electricity, have high malleability and ductility.
Hope it helped!
Need help asap
1. All nonmetals (except hydrogen) have 8 valence electrons?
True or False
2. The N^-3 ion is classified as a(n) ____ and has ____.
A. anion, 8 valence electrons
B. cation, 8 valence electrons
C. anion, 15 valence electrons
D. anion, 3 valence electrons
3. If two nonmetals react to form a compound and have very different _____ they form ____ bonds. If there is a small difference, then they form ____ bonds.
A. ionization energy; covalent; nonpolar ionic
B. electronegativity; nonpolar covalent; polar covalent.
C. ionization energy, ionic, nonpolar covalent
D. electronegativity, polar covalent, nonpolar covalent.
Answer:
1: false
2: B
Explanation:
I do not know the 3rd one
the gravitational force between two objects depends on the distance between the objects and each object?
Answer:
Gravitational force between two objects depends on: a. The weight of the objects c. The mass of each object b. The distance between the objects d. Both b and c Please select the best answer from the choices provided A B C D
✓d
HELPP! What is ammonium nitrates freezing point ?
Answer:
Freezing points for water with freezing mixtures based on salt and ice: Ammonium Nitrate - Chrushed Ice or Snow in Water 1 part Ammonium Nitrate - 0.94 parts Ice/water : temperature -4 o C 1 part Ammonium Nitrate - 1.20 parts Ice/water : temperature -14 o C
Explanation:
PLZ HELP BEING TIMED!!!!!PLZ ANSWER!!!!
Answer:
1st one
Explanation:
what element has greatest atomic radius from group 3?
Answer:
i think iron
Explanation:
i not sure with my ans
I need help. Please help with the best of your ability.
Answer:
Photosynthesis transforms light energy into chemical energy by making sugars. Cellular respiration releases the chemical energy from food by breaking down sugars.
Explanation:
I'm actually learning this in school right now
Hope this helps!
~PurpleMist
Express 4,935,000 using standard scientific notation
Answer:
4.935×10-1
Explanation:
Take away the 0
Measure that affects the thermal energy of matter but not it's temperature.
Answer: mass
Explanation:
what molecules must the plant take in so the process of photosynthesis can occur
Answer:
Glucose molecules
Explanation:
How many moles are in 56.4 grams of AlF3
Answer: 0.671614483912211
Explanation: A mole is 6.02214076×1023 (also known as the Avogadro number) I hope this helps!
Sodium chlorite decomposes into salt and oxygen gas. What is the correct balanced decomposition reaction.
NaClO3 -> NaCl + O2
Answer:
i think it would be c
Explanation:
sorry if it is wrong
Answer:
2NaClO₃ -> 2NaCl + 3O₂
Explanation:
The number of atoms in the reactants has to equal the number of atoms in the products.
Hope that helps.
What kind of intermolecular forces act between a hydrogen cyanide molecule and a potassium cation?
If there is more than one type of intermolecular force that acts, be sure to list them all, with a comma between the name of each force.
(dipole, hydrogen-bonding, dispersion, ion-dipole)
Answer:
ion-dipole
Explanation:
Let us remember that the potassium cation is an ion, a positive ion to be precise.
There is a dipole existing in the hydrogen cyanide molecule. The positive end of the dipole is on hydrogen while the negative end of the dipole is on the cyanide moiety.
The only possible interaction between the potassium cation and the hydrogen cyanide is an ion dipole interaction. The cation interacts with the cyanide moiety having a partial negative charge in the molecule.
