Answer:
Chemical Formula: Fe2O3.
Explanation:
Iron(III) oxide, ferric iron, hematite, red iron oxide, synthetic maghemite, colcothar, or simply rust—is one of the several oxide compounds of iron, and has paramagnetic properties
The formula for Carbon Trioxide is CO₃.
In Carbon Trioxide (CO₃), one carbon atom is bonded to three oxygen atoms. The subscript "3" indicates that there are three oxygen atoms in the molecule.
Carbon trioxide (CO₃) is not a stable molecule, and it does not exist as a discrete compound. The actual chemical formula for this compound does not represent a real chemical species.
Carbon trioxide was once proposed as a hypothetical compound with a triangular cyclic structure containing one carbon atom and three oxygen atoms. However, further research and experiments have shown that this structure is not viable due to the instability and high reactivity of such a compound.
Learn more about Carbon Trioxide from the link given below.
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If the equilibrium constant for the reaction A 2B C 5/2 D has a value of 4.0, what is the value of the equilibrium constant for the reaction 2C 5D 2A 4B at the same temperature
Answer:
[tex]K'=\frac{1}{16}[/tex]
Explanation:
Hello!
In this case, since the given reaction is:
[tex]A+ 2B \rightleftharpoons C+ \frac{5}{2} D[/tex]
Whereas the equilibrium constant is:
[tex]K=\frac{[C][D]^{5/2}}{[A][B]^2} =4.0[/tex]
However, the new target reaction reverses and doubles the initial reaction to obtain:
[tex]2C+5D \rightleftharpoons 2A+4B[/tex]
Whereas the equilibrium constant is:
[tex]K'=\frac{[A]^2[B]^4}{[C]^2[D]^5}[/tex]
Which suggest the following relationship between the equilibrium constants:
[tex]K'=\frac{1}{K^2}[/tex]
So we plug in to obtain:
[tex]K'=\frac{1}{4.0^2}\\\\K'=\frac{1}{16}[/tex]
Best regards!
prove that PV = nRT.
Find your answer in the explanation below.
Explanation:
PV = nRT is called the ideal gas equation and its a combination of 3 laws; Charles' law, Boyle's law and Avogadro's law.
According to Boyle's law, at constant temperature, the volume of a gas is inversely proportional to the pressure. i.e V = 1/P
From, Charles' law, we have that volume is directly proportional to the absolute temperature of the gas at constant pressure. i.e V = T
Avogadro's law finally states that equal volume of all gases at the same temperature and pressure contain the same number of molecules. i.e V = n
Combining the 3 Laws together i.e equating volume in all 3 laws, we have
V = nT/P,
V = constant nT/P
(constant = general gas constant = R)
V = RnT/P
by bringing P to the LHS, we have,
PV = nRT.
Q.E.D
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Answer:
Calcium carbonate and citric acid.
Explanation:
Hello!
In this case, considering the text, we can notice that calcium carbonate combines with citric acid to produce the calcium citrate water and carbon dioxide as shown on the following equation:
[tex]3CaCO_3+2C_6H_8O_7\rightarrow Ca_3C_{12}H_{10}O_{14}+CO_2+H_2O[/tex]
Whereas the reactants, at the left side, are identified as calcium carbonate and citric acid.
Best regards!
Each element has a different:
Number of protons and electrons
Atomic mass and weight
Properties and characteristics
Number of neutrons
Select all that apply
Answer:
Your two answers are numbers of protons and electron and the second one is the atomic mass and weight.
Explanation:
God bless you are you got this
Answer:Number's 1, 2, and 4 are correct
Explanation:
Using energy efficiently and managing it well do not reduce society's impact on Earth.
True or False?
Answer:
False
Explanation:
Using less electricity will result in less fuel being burnt which will result in less fuel needing to be extracted from the earth which will reduce society's impact on earth.
Calculate the grams of sugar present in a 355ml can of soda if the water in the can weighs 355g and the density of the soda is 1.06g/mL?
Mass of sugar in the can : 21.3 g
Further explanationGiven
a 355ml can of soda
mass water = 355 g
density of soda = 1.06 g/ml
Required
mass of sugar
Solution
Mass of soda in the can :
= density x volume of the can
= 1.06 g/ml x 355 ml
= 376.3 g
Mass of sugar :
=mass of soda - mass of water
= 376.3 g - 355 g
= 21.3 g
compared to a solution with a ph of 7, a solution with a ph of 4 is
Answer:
pH of 7 is neutral
pH of 4 is weak acid
Explanation:
hope it helps you..
calculate the number of molecules in 6.4g of Sulphur (iv) oxide
Answer:
N= mass/molar mass
complete the solve
Biological half-life of medicine works in the same way as radiological half-life. Acetaminophen (Tylenol) has a biological half-life of about 2 hours (though it varies depending on individual metabolism). What percentage of your original dosage remains in your system after 6 hours when you are allowed to take another dose?
Answer:
12.5%
Explanation:
From the question given above, the following data were obtained:
Half-life (t½) = 2 h
Time (t) = 6 h
Percentage remaining =.?
Next we shall determine the number of half-lives that has elapse. This can be obtained as follow:
Half-life (t½) = 2 h
Time (t) = 6 h
Number of half-lives (n) =?
n = t / t½
n = 6/2
n = 3
Finally, we shall determine the percentage of original dosage remaining as follow:
Amount remaining (N) = Original amount (N₀) /2ⁿ
N = N₀ / 2ⁿ
Divide both side by N₀
N/N₀ = 1/2ⁿ
Input the value of n i.e 3
N/N₀ = 1/2³
N/N₀ = 1/8
N/N₀ = 0.125
Multiply by 100 to express in percent.
N/N₀ = 0.125 × 100
N/N₀ = 12.5%
Thus, percentage of original dosage remaining is 12.5%
What is the SI unit of mass?
Select one:
a.
Ounce
b.
Newton
c.
Pound
d.
Gram
Answer: The answer is D.gram
Explanation:
Calculate the mass of vanadium(V) oxide (V2O5) that contains a billion (1.000e9) vanadium atoms. Be sure your answer has a unit symbol if necessary, and round it to 4 significant digits._______
Answer:
1.510 × 10⁻¹³ g
Explanation:
Step 1: Given data
Number of atoms of vanadium: 1.000 × 10⁹ atoms
Step 2: Calculate the molecules of V₂O₅ that contain 1.000 × 10⁹ atoms of V
Each molecule of V₂O₅ has 2 atoms of V.
1.000 × 10⁹ atom V × (1 molecule V₂O₅/2 atom V) = 0.5000 × 10⁹ molecule V₂O₅
Step 3: Calculate the moles corresponding to 0.5000 × 10⁹ molecules of V₂O₅
We will use Avogadro's number: there are 6.022 × 10²³ molecules of V₂O₅ in 1 mole of V₂O₅.
0.5000 × 10⁹ molecule × (1 mol/6.022 × 10²³ molecule) = 8.303 × 10⁻¹⁶ mol
Step 4: Calculate the mass corresponding to 8.303 × 10⁻¹⁶ moles of V₂O₅
The molar mass of V₂O₅ is 181.88 g/mol.
8.303 × 10⁻¹⁶ mol × 181.88 g/mol = 1.510 × 10⁻¹³ g
Which element has the greatest electronegativity?
a. Rubidium
b. Silver
c. Tin
d. Iodine
The freezing and thawing action of water affects a rock by...
A. leaving behind sedimentary particles from evaporation
B. gradually breaking down the rock into smaller pieces
C. chemically weathering the rock
D. transforming the rock into igneous rock
Answer:
B
Explanation:
How many sigma bonds and how many pi bonds are there in the tetracyanoethylene molecule
Answer:
Nine σ- and nine π
Explanation:
Nine σ- and nine π are there in the molecule of tetracyanoethylene.
WILL GIVE BRAINEST + 500 PTS ...
1.Scientists have evidence that the universe is [expanding/shrinking].
2.Objects moving away from Earth appear [blue/red], and objects moving toward Earth appear [blue/red].
3. Light from most other galaxies appears [blue/red], which makes sense if the universe is [collapsing inward/spreading out].
Answer:
1. expanding
2. red, blue
3. red, spreading out
Explanation:
Calculate the number of gams of nitrogen dioxide that are produced from 4 moles of nitric oxide
2NO(g) + O2(g) → 2NO2(g)
PLZ ANSWERRR FAST
Answer: 184 g of nitrogen dioxide that are produced from 4 moles of nitric oxide
Explanation:
The balanced chemical reaction is:
[tex]2NO(g)+O_2(g)\rightarrow 2NO_2(g)[/tex]
According to stoichiometry :
2 moles of [tex]NO[/tex] produce = 2 moles of [tex]NO_2[/tex]
Thus 4 moles of [tex]NO[/tex] will require=[tex]\frac{2}{2}\times 4=4moles[/tex] of [tex]NO_2[/tex]
Mass of [tex]NO_2=moles\times {\text {Molar mass}}=4moles\times 46g/mol=184g[/tex]
Thus 184 g of nitrogen dioxide that are produced from 4 moles of nitric oxide
the 2 written in this formula (2 CH4 is a)
Answer : 2 represent the coefficient.
Explanation :
As we know that:
The coefficients used in the chemical equations shows that the relative amounts of each substance present and this amount can represent either the relative number of molecules or number of moles.
If there is no coefficient then one (1) is assumed.
That means,
The coefficient tell us about that how many molecules or atoms present in the chemical equation.
By the stoichiometry we have to convert moles of a reactant to moles of a product.
The given formula is: [tex]2CH_4[/tex]
In this formula, 2 represent the coefficient and 4 represent the subscript and C and H represents the symbol of element.
Hence, 2 represent the coefficient.
This is the chemical formula for acetone: CH32CO. Calculate the mass percent of carbon in acetone.
Answer:
62.07 %
Explanation:
Chemical Formula = (CH3)2CO = C3H6O
Mass of C = 12 g/mol
Mass of H = 1 g/mol
Mass of O = 12 g/mol
Mass of C3H6O = 3(12) + 6(1) + 16 = 58 g/mol
Total mass of C in Acetone = 12 * 3 = 36 g
Mass Percent of C = Total mass of C / Mass of Acetone * 100
Mass percent = 36 / 58 * 100
Mass percent = 62.07 %
Draw a Lewis structure for ketene, C2H2O , which has a carbon‑carbon double bond. Include all hydrogen atoms and show all unshared electron pairs. None of the atoms bears a formal charge, and all atoms have octets (except for hydrogen atoms, which have duets).
Answer: The lewis dot structure is attached below.
Explanation:
A Lewis dot structure is defined as the representation of atoms having electrons around the atom where electrons are represented as dots.
A ketene is an organic compound having general formula R′R″C=C=O, where R and R' are two different/same monovalent chemical groups.
The given chemical compound having formula [tex]C_2H_2O[/tex] is represented as [tex]H_2-C=C=O[/tex].
Total number of unshared electrons = 4 (left on oxygen atom only)
The lewis dot structure of [tex]C_2H_2O[/tex] is given in the image below.
HELP ME PLEASE!! IAM BEING TIMED.
I WILL GIVE YOU BRAINLIEST!
Answer:
Element
Explanation:
Other things on that list like alloy and compound can be broken down, but elements cannot
Answer:
If it is made from solid silver then it is an element. If it is made from a silver alloy then it is a mixture. If it is a silver plated plate (i.e. a plate made from say, copper but with a thin layer of silver on top) then it is an element on top of an element.
Explanation:
I'm assuming you're talking about solid silver, so, i believe an element.
Pleas help!!! I’ll make brainlist
Answer: 4.6 billion years ago
Explanation:
Answer:
4.6 billion years ago
hope this helps have a good day or night:)
An electron jumps from energy level 1 to energy level 2 by absorbing a photon of energy 8 eV. What is the most likely energy of the photon that will be emitted by the electron when it moves back down to energy level 1?
A. 2 eV
B. 4 eV
C. 8 eV
D. 12 eV
Answer:
C. 8 eV
Explanation:
In atoms, the energy of each level is quantised. That is one of the reasons why an electron can not exist between energy levels. Thus, when the electron absorbs energy of 8 ev, it get excited and jumps to energy level 2 which has the current value of energy of the electron.
Thus for the electron to move back to its initial energy level, it must emit the exact energy absorbed for its excitation. Therefore, the likely energy of the photon that will be emitted is 8 ev. This would make the electron to have energy that would make it to exist on energy level 1.
Percentage of C in CO
The percentage of C in CO = 42.9%
Further explanationGiven
CO compound
Required
Percentage of C
Solution
Proust :
Compounds are formed from elements with the same Mass Comparison so that compounds have a fixed composition of elements
Ar of C = 12 g/mol
MW of CO = 28 g/mol
%C :
[tex]\tt =\dfrac{Ar~C}{MW~CO}\times 100\%\\\\=\dfrac{12}{28}\times 100\%\\\\=42.9\%[/tex]
answer to this question is = 42.9 %
Explanation:
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Answer: increase the bicycles acceleration hope this helps :]
Explanation:
How does latitude affect climate? A The closer to the poles, the warmer it gets. B The closer to the equator, the warmer it gets. C The higher you go up a mountain, the colder it gets. D The higher you go up a mountain, the warmer it gets.
Explanation:
1. Latitude or distance from the equator – Temperatures drop the further an area is from the equator due to the curvature of the earth. In areas closer to the poles, sunlight has a larger area of atmosphere to pass through and the sun is at a lower angle in the sky.
The mass of one gallon of water is approximately 3.78 kg or 3780 grams. How many moles are contained in one gallon of water?
a. 102
b. 210
c. 120
d. 201
Answer:
Number of moles of water = 210 mol
Explanation:
Given data:
Mass of water = 3780 g
Number of moles of water = ?
Solution:
Formula:
Number of moles = mass/molar mass
Molar mass of water = 18 g/mol
Number of moles = 3780 g/ 18 g/mol
Number of moles of water = 210 mol
socratic For the following reaction, 25.6 grams of hydrochloric acid are allowed to react with 52.4 grams of barium hydroxide . hydrochloric acid(aq) barium hydroxide(aq) barium chloride(aq) water(l) What is the maximum amount of barium chloride that can be formed
Answer:
63.7g BaCl₂
Explanation:
Based on the chemical reaction:
2HCl + Ba(OH)₂ → BaCl₂ + 2H₂O
2 moles of HCl reacts per mole of barium hydroxide
To solve this question, we need to convert the moles of each reactant to moles and, using the chemical reaction, find limiting reactant as follows:
Moles Ba(OH)₂ - Molar mass: 171.34g/mol-
52.4g Ba(OH)₂ * (1mol / 171.34g) = 0.306 moles Ba(OH)₂
Moles HCl - Molar mass: 36.46g/mol-
25.6g HCl * (1mol / 36.46g) = 0.702 moles HCl
For a complete reaction of 0.702 moles HCl are required:
0.702 moles HCl * (1mol Ba(OH)₂ / 2mol HCl) = 0.351 moles of Ba(OH)₂
As there are just 0.306 moles, limiting reactant is Ba(OH)₂
That means the maximum amount of BaCl₂ produced is:
0.306 moles Ba(OH)₂ * (1mol BaCl₂ / 1 mol Ba(OH)₂) = 0.306 moles BaCl₂
In mass -Molar mass BaCl₂: 208.23g/mol-
0.306 moles BaCl₂ * (208.23g / mol) = 63.7g BaCl₂
9. If the limits of cow hearing are 23 Hz to 35,000 Hz, what are the sound wavelengths that are
associated with both of these two extremes, assuming the speed of sound is 345 m/s.
Frequency= 23 Hz: Wavelength =
Frequency = 35,000 Hz: Wavelength =
Answer:
wave length=speed/frequency
=365/23
wave length=speed/frequency
=365/35000
A bottle of a commercial reagent-grade hydrochloric acid, HCI, has the following
information on its label: Assay 37% HCl by mass; density 1.19 g/mL. Calculate the
volume (ml) of concentrated Hd needed to prepare 250 mL of 0.1M HCI.
The volume of concentrated HCl : 2.073 ml
Further explanationGiven
37% HCl by mass; density 1.19 g/mL
Required
The volume of concentrated HCl
Solution
Conversion to molarity :
37% x 1.19 g/ml =0.4403 g/ml
g/ml to mol/L :
=0.4403 g/ml x 1000 ml/L : 36.5 g/mol
=12.06 mol/L
or we can use formula :
[tex]\tt M=\dfrac{\%\times \rho\times 10}{MM}\\\\M=\dfrac{37\times 1.19\times 10}{36.5}\\\\M=12.06[/tex]
Dilution formula :
M₁V₁=M₂V₂
12.06 M x V₁ = 0.1 M x 0.25 L
V₁ = 0.0021 L = 2.073 ml
meaning of science in university
Answer:
Science is the pursuit and application of knowledge and understanding of the natural and social world following a systematic methodology based on evidence. Experiment and/or observation as benchmarks for testing hypotheses
Explanation: