Answer:
CaC
O
3
--------> CaO + C
O
2
20.7 g 6.81g +
As per the law of Conservation of mass , in any chemical reaction, the total mass of products is equal to the total mass of the reactants.
mass of C
O
2
+ mass of CaO is equal to the mass of CaC
O
3
.
mass of C
O
2
+ 6.81g = 20.7g
mass of C
O
2
= 20.7g- 6.81g = 13.89g
% yield of a Product Z = mass of product Z x 100 / mass of reactant
% yield of Product C
O
2
= 13.89 x 100 / 20.7 = 67. 10%
% yield of Product CaO = 6.81g x 100 /20.7 = 32.89%
Explanation:
:)
How often does the tip of and hour hand on a clock have the same velocity?
Answer:
Estoy triste, tuve que regalar a mi perro
Decide whether the compound is ionic or molecular, if you can.
A Compound is a deep red solid with a noticeable unpleasant smell. It dissolves slightly in water, and a solution of in of water doesn't change the electrical conductivity of the water.
Answer:
Molecular solid
Explanation:
A molecular solid has a low melting point, they are soft and do not conduct electricity.
We have been told in the question that the solid does not really dissolve in water and it's solution does not improve the electrical conductivity of water. Hence, it must be a molecular solid.
A certain solid element is better electrical conductor than sulfur, but a poorer electrical conductor than copper. Which of the following elements is most consistent with this information.
a) germanium b) oxygen c) potassium d) mercury e) neon
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!
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
If you have moles and want to convert to liters, which conversion factor would you use
Answer:
When converting from liters to moles or moles to liters, you will use the equality 1 mole=22.4 L for a gas at STP.
If you have moles and want to convert to (Volume) liters, 1 mole = 22.4 L is the conversion factor that can be used.
The area that any three-dimensional solid occupies is known as its volume. These solids can take the form of a cube, cuboid, cone, cylinder, or sphere. Various forms have various volumes. We have studied the several solids and forms that are specified in three dimensions, such as cubes, cuboids, cylinders, cones, etc., in 3D geometry. We will discover how we can determine the volume for each of these shapes. One mole of any gas have 22.4 L at STP.
1 mole = 22.4 L
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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
How many molecules are equal to 89.23g of calcium oxide
Answer:
1.593 moles
Explanation:
Therefore, 1.593 moles are equal to 89.23 g of calcium oxide.
Answer:
9.64 × 10²³ molecules
Explanation:
Given data:
Mass of calcium oxide = 89.23 g
Number of molecules = ?
Solution:
First of all we will calculate the number of moles of calcium oxide.
Number of moles = mass/molar mass
Number of moles = 89.23 g/ 56.1 g/mol
Number of moles = 1.6 mol
Number of molecules;
1 mole contain 6.022 × 10²³ molecules
1.6 mol × 6.022 × 10²³ molecules / 1mol
9.64 × 10²³ molecules
The number 6.022 × 10²³ is called Avogadro number.
C3H8 + 5 O2 → 3 CO2 + 4 H2O
a. 3.80 moles of oxygen are used up in the reaction. How many grams of water are produced?
b. How many grams of oxygen does it take to produce 90.6 grams of Carbon Dioxide?
Answer:
¹/3 C3H8(g) + ⁵/3 O2(g)
Explanation:
The coefficient before every molecule is representative of the number of moles. We can represent it in ration form so as to calculate the question;
C₃H₈(g) + 5 O₂(g) → 3 CO₂(g) + 4 H₂O(l) means;
For every 1 mole of C₃H₈(g) and 5 moles of O₂(g) produces 3 moles of CO₂(g) and 4 moles of H₂O(l).
Therefore to produce 1.00 mole of CO₂(g);
We represent it in ratio;
C₃H₈(g) : CO₂(g)
1 : 3
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We can write:
5/4 = 3,8/x
Solving for x:
x = 3,04 mols of H2O
Calculating the H2O mass:
M H2O = 18 g/mol
n = m/M
Solving for m:
m = 54,72 g of water
****************************
Using the same, but with molar mass:
M CO2 = 44 g/mol => 3 x 44 = 132 g
M O2 = 32 g/mol => 5 x 32 = 160 g
160/132 = x/90,6
solving for x:
x = 109,82 g if CO2
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.
My question my question
H2O as an oxidant only
Further explanationGiven
Reaction
2 Na + 2 H2O → 2 NaOH + H2
Required
The function of water in the equation
Solution
Water : oxidizing agent
Na : reducing agent
Na⁰ → Na⁺ (oxidation)
H⁺- → H⁰ (reduction)
Acids and bases according to Bronsted-Lowry
Acid = donor (donor) proton (H⁺ ion)
Base = proton (receiver) acceptor (H⁺ ion)
If water is acting as an acid it should only give 1 H +, so that becomes:
H₂O (l) ⇔ OH⁻ (aq) not H₂
Anyone Free can help me with this question please ?
Answer:
68
Explanation:
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a
d
a
d
a
da
d
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a
How much drug should be used in preparing 50mL of solution such that 5 mL diluted 500mL will yield 1:1000 solution?
Stock solutions contain a standardized concentration of the solute in a solution. To prepare 50 mL of solution with a ratio of 1:1000 solution, 5 gms of the drug will be required.
What is dilution?Dilution is the property of the solution with a less amount of solute concentration than the stock solution. A dilute solution is prepared by the addition of more solvent.
The addition of the solvent in a solution decreases the molar concentration which leads to dilution.
The ratio of 1:1000 means that 1 gm of the drug is present in 1000 mL (1L) of solution.
1000 mL = 1 gm × 500 mL × X gm
Here, the X represents the 0.5 gm of drug dissolved in 500 mL.
The amount of drug used is calculated as,
5 mL ÷ 50 ml = 0.5 g ÷ X g
X = 0.5 × 50 ÷ 5
= 5 gm
Therefore, 5 gm of the drug is required to prepare 50 mL of solution.
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7.
Use the reaction below for the reaction of dicyanoacetylene with
ozone to produce carbon monoxide and nitrogen.
3C4N2(8) + 403(g) → 1200(8) + 3N2(g).
What volume of CO is produced when 1.20 L of C4N2 reacts?
a 0.300 L CO
b 3.60 L CO
C 14.4 L CO
d 4.80 L CO
Answer:
D
Explanation:
The volume of carbon monoxide is produced when 1.20 L of dicyanoacetylene reacts is
What is stoichiometry?Stoichiometry of any reaction tells about rhe relative amount of substance present before and after the completion of any chemical reaction.
Given balanced chemical reaction between dicyanoacetylene and ozone to produce carbon monoxide and nitrogen is:
3C₄N₂ + 4O₃ → 12CO + 3N₂
From the stoichiometry of the reaction it is clear that:
3 liters of C₄N₂ = produces 12 liters of CO
1.20 liters of C₄N₂ = produces 12/3×1.20=4.8 liters of CO
Hence option (d) is correct i.e. 4.8 liters.
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HELPPP PLEASE
Calculate the mass of beryllium (Be) needed to completely react with 18.9 g nitrogen gas (N2) to produce Bez N2, which is the only product of the reaction.
A. 6.19
B. 12.29
C. 18.29
D. 36.69
Answer:
Mass = 18.29 g
Explanation:
Given data:
Mass of beryllium needed = ?
Mass of nitrogen = 18.9 g
Solution:
Chemical equation:
3Be + N₂ → Be₃N₂
Number of moles of nitrogen:
Number of moles = mass/molar mass
Molar mass of nitrogen = 28 g/mol
Number of moles = 18.9 g/ 28 g/mol
Number of moles = 0.675 mol
Now we will compare the moles of nitrogen and Be.
N₂ : Be
1 : 3
0.675 : 3/1×0.675 = 2.03 mol
Mass of Be:
Mass = number of moles × molar mass
Mass = 2.03 mol × 9.01 g/mol
Mass = 18.29 g
plz help it's urgent
The number of moles left = 0.0067 moles
Further explanationGiven
0.28 g CO
2 x 10²¹ molecules removed
Required
Number of moles left
Solution
Initial mol of CO(MW=28 g/mol) :
mol = 0.28 : 28
mol = 0.01
The number of molecules in 0.01 mol :
= 0.01 x 6.02 x 10²³
= 6.02 x 10²¹
2 x 10²¹ molecules removed, so molecules left :
= 6.02 x 10²¹ - 2 x 10²¹
= 4.02 x 10²¹
moles of 4.02 x 10²¹ :
= 4.02 x 10²¹ : 6.02 x 10²³
= 0.0067 moles
When recommending solutions to decrease human impact, which location were you able to make the greatest positive impact? Please explain your selection by using data from the simulation.
What recommendations would you give to your local community to help to decrease the local effects of human impact on the environment? List 2 recommendations and how they will positively impact your community.
What recommendations would you give to the global governments to help decrease the global effects of human impact on the environment? List 2 recommendations and how they will positively impact our planet.
When recommending solutions to decrease human impact, which location were you able to make the greatest positive impact? Please explain your selection by using data from the simulation.
New york, 893 - 853 = 40 which is the highest quotient.
What recommendations would you give to your local community to help to decrease the local effects of human impact on the environment? List 2 recommendations and how they will positively impact your community.
Installing solar panels and replanting 2 trees for every tree that’s been cut down, this will help the atmosphere and deforestation.
What recommendations would you give to the global governments to help decrease the global effects of human impact on the environment? List 2 recommendations and how they will positively impact our planet.
Constructing using only recycled materials decreases water pollution to 823 ppm and Creating more protected areas decreases air pollution to 368 ppm this will help the environment and oxygen.
Answer:
........
Explanation:
What is the kinetic energy of a ball when it stops moving?
Question 2 options:
3
2
1
Answer:0
Explanation:
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
If the pressure, volume, and temperature of a gas are known, which can most likely be found by using the ideal gas law?
a.the molar amount of the gas
b.the partial pressure of the gas
c.the standard temperature and pressure
d.the molar mass
Answer:
the moral amount of the gas.
Red blood cells are constantly being produced in your body. Another body system cooperates with the cardiovascular system in the production of these cells. What is this system and how does it cooperate?
An unknown compound has the following chemical formula: N2OX here stands for a whole number. Measurements also show that a certain sample of the unknown compound contains 4.00mol of oxygen and 2.67mol of nitrogen. Write the complete chemical formula for the unknown compound.
The complete chemical formula for the unknown compound : N₂O₃
Further explanationGiven
The chemical formula : N₂Oₓ
4.00 mol of oxygen and 2.67 mol of nitrogen
Required
The chemical formula
Solution
A molecular formula is a formula that shows the number of atomic elements that make up a compound.
The molecular formula of a compound shows the mole ratio of each of its constituent components
The mol ratio for N : O =
2.67 : 4 : divide by 2.67
1 : 1.5 = 2 : 3
What are the coefficients that would correctly balanced reaction
Answer: As a consequence, chemical equations must be balanced, meaning that the number and kinds of atoms must be the same on both sides of the reaction arrow. The numbers placed in front of formulas to balance equations are called coefficients, and they multiply all the atoms in a formula.
do all atoms only have one oxidation state
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.
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Calculate the molar mass of NH4NO3.
molar mass of NH4NO3 =
g/mol
Answer:
67g/mol
Explanation:
The given compound is:
NH₄NO₃ :
Problem here is to find the molar mass of the compound.
Now;
The molar mass is the sum of the atomic masses of the elements in the compound.
Atomic mass of N = 14g
Atomic mass of H = 1g
Atomic mass of O = 16g
So;
Molar mass = 14 + 4(1) + 1 + 3(16) = 67g/mol
Answer:
the answer is 80.0 grams per mole
Explanation:
How many atoms are present in 0.035 moles?
Answer:
[tex]2.11x10^{22}atoms[/tex]
Explanation:
Hello!
In this case, considering the Avogadro's number, which relates the number of particles and one mole, we can infer that 1 mole of any element contains 6.022x10²³ atoms as shown below:
[tex]\frac{6.022x10^{23}atoms}{1mol}[/tex]
Thus, we compute the number of atoms in 0.035 moles as shown below:
[tex]atoms=0.035mol*\frac{6.022x10^{23}atoms}{1mol} \\\\atoms=2.11x10^{22}atoms[/tex]
Best regards!
6. What is the equilibrium constant for the following reaction?
C+02 = CO2
Given
Reaction
C+02 = CO2
Required
The equilibrium constant
Solution
The equilibrium constant is the ratio of concentration or pressure between the product and the reactant with each reaction coefficient raised
The equilibrium constant is based on the concentration (Kc) in a reaction
pA + qB -----> mC + nD
[tex]\large {\boxed {\bold {Kc ~ = ~ \frac {[C] ^ m [D] ^ n} {[A] ^ p [B] ^ q}}}}[/tex]
So for the reaction :
C+O₂ ⇔ CO₂
[tex]\tt Kc=\dfrac{[CO_2]}{[C][O_2]}[/tex]
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%
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
