4. Calculate the volume of oxygen produced in the decomposition of 5 moles of KCIO3 at STP?
Answers
Answer:
2KClO3=2KCl + 3O2
n(O2)=7.5 moles
V(O2)=7.5*22.4=168 litres
The mole ratio of oxygen (O2) to KClO3 in the decomposition reaction is 3 : 2.
Moles of oxygen produced
= (Moles of KClO3 used) × 3/2
= 5 mol × 3/2
= 7.5 mol
Volume of 1 mol of oxygen at STP = 22.4 L
Volume of 7.5 mol of oxygen = 22.4 L × 7.5
= 168 L (answer)
Related Questions
A galaxy is a system of celestial bodies, such as stars, planets, several solar systems, and interstellar gas and dust. Our solar system is a part of a galaxy called
Answers
Answer:
The Milky Way
Explanation:
Answer:
The Milky Way
Explanation:
Which of the following substances contain an alkali?
Answers
what if you measurd out more Fe then you calculated but the same amount of CUSO4 How would your amount of CU produced be affected
Answers
Answer:
Increase
Explanation:
Fe + CuSO4 - - > Fe2(SO)3 + Cu
If concentration of Fe increases, it will increase the frequency of collisions between the two reactants. Therefore the amount of Cu will also increase.
what is the minimum number of atoms that could be contained in the unit cell of an element with a body-centered cubic lattice?
Answers
The smallest number of atoms that could fit inside the unit cell of an element with a body-centered cubic lattice is XM4.
M ion is present in between each edge and one in the center too
so,no.of atoms per unit cell,
((12)*(1/4))+1=4 atoms
{case 1 These are 12 total atoms that are stored between four unit cells and an atom at the center that is not stored with any other unit cell}
X is at the corner of the unit cell so, the no. of atoms per unit cell=
((8)*(1/8))=1
{case 2 These are a total of 8 corners having one atom at each that, is shared between 8 unit cells}
so, the empirical formula of the compound must be
XM₄
As no option is matching with the answer, there is an error in the option also formula X2M is repeated 2 times may be an error
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what would happen to partial pressures of gases in the blood if the breathing rate did not increase with physical exercise?
Answers
If breathing rate did not increase with physical exercise, the partial pressures of oxygen and carbon dioxide in the blood would be insufficient to meet the demands of the body's tissues.
During physical exercise, the body's oxygen demand increases, and carbon dioxide production also rises. If breathing rate remains constant, the rate of gas exchange in the lungs will not be sufficient to provide enough oxygen to the blood and remove excess carbon dioxide.
This will lead to a decrease in the partial pressure of oxygen (pO2) in arterial blood, which can result in hypoxemia and tissue damage. The partial pressure of carbon dioxide (pCO2) in the blood would increase due to its inadequate elimination, leading to respiratory acidosis.
Thus, without an increase in breathing rate during physical exercise, the partial pressures of oxygen and carbon dioxide in the blood would not reach the levels necessary to meet the body's metabolic demands, potentially leading to tissue damage and respiratory acidosis.
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Which evidence suggests that the materials in the asthenosphere are near their melting point? Choose the correct answer.
The asthenosphere is made of lighter elements.
The temperature of core samples taken from the asthenosphere is near 500 K.
The velocity of seismic waves increases suddenly when they enter the asthenosphere.
The velocity of seismic waves decreases suddenly when they enter the asthenosphere.
Answers
Answer: The asthenosphere is made of lighter elements.
Explanation:
The asthenosphere has obtained its name from Greek word called asthenis, which mean weak. The strength of asthenosphere is lower than that of overlying lithosphere. If the temperature of lithosphere raises high enough then asthenosphere will melt. This layer is ductile and deforms very easily.
A remnant or trace of an organism from the past is called a
Answers
Answer:
a fossil
Explanation:
Answer:Fossil
Explanation:A remnant or trace of an organism of a past geologic age, such as a skeleton or leaf imprint, embedded, and preserved in the Earth's crust, usually in stratified rock.
How can you relieve stress?
Answers
show how to prepare the following compounds starting from the appropriate aldehyde
Answers
To prepare the following compounds, start from the appropriate aldehyde.
What is the initial compound required for the synthesis?In organic synthesis, the appropriate aldehyde serves as the crucial starting material for the preparation of various compounds. Aldehydes are organic compounds that contain a carbonyl group (C=O) with a hydrogen atom attached to the carbonyl carbon. They can be derived from the oxidation of primary alcohols or the partial oxidation of primary alkyl halides.
To synthesize specific compounds, the aldehyde undergoes a sequence of chemical transformations involving different reactions. These reactions may include reduction, oxidation, condensation, and substitution, among others, depending on the desired target compounds. Each reaction introduces or modifies specific functional groups, allowing the synthesis of a wide range of organic compounds with diverse structures and properties.
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Describe how you would prepare a supersaturated solution
Answers
Answer:
A supersaturated solution contains more dissolved solute than required for preparing a saturated solution and can be prepared by heating a saturated solution, adding more solute, and then cooling it gently. Excess dissolved solute crystallizes by seeding supersaturated solution with a few crystals of the solute.
Explanation:
why is sulfuric acid considered as a positive catalysts in esterification
Answers
Answer:
Because it is a strong acid
Explanation:
All strong acids are consideredpositive
True or false covalent, compounds, mainly contain elements in group one and two of the periodic table
Answers
The given statement is false. Compounds present in the group one and two of the periodic table form ionic bonds.
Covalent compounds are those compounds which are formed by equal sharing of electrons by two atoms to make a covalent bond. The elements present in the right side of the periodic table i.e mainly the elements present in the group 14-17, which are non-metals forms covalent bonds.
The elements present in group 1 and 2 of the periodic table are called alkali metals and alkaline earth metals respectively. These elements have the tendency to form electropositive ions, so they form ionic bonds.
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HELP!! 75 pts
A 12.00 gram sample of a crude ore contains 2.89 % HgS. What is the percentage of mercury in the ore? (2.49)
Answers
The percentage of mercury in the ore : 2.49%
Further explanationGiven
12 g of sample
2.89% HgS
Required
The percentage
Solution
mass of HgS in the ore :
= 2.89% x 12 g
= 0.3468 g HgS
Mass of Hg in HgS :
= (Ar Hg/MW HgS) x mass HgS
= (200.592/232,66 g/mol) x 0.3468
= 0.299 g
% mercury (Hg) in sample(a crude ore) :
= (0.299 g : 12 g) x 100%
= 2.49%
Is calcium chloride reactive?
Answers
Answer:
Yes it is
Explanation:
calcium chloride releases heat in an exothermic reaction.
yes.
hope is helps! :)
Hydrogen Gas (H₂)
A. 2 atoms of oxygen
B. 2 atoms of hydrogen
C. 1 atom of hydrogen
D. 3 atoms of hydrogen
Answers
which part of a soap is responsible for its ability to dissolve fats and oily dirt?
Answers
The part of soap responsible for its ability to dissolve fats and oily dirt is its hydrophobic tail.
Soap is made up of molecules that have both hydrophobic (water-repelling) and hydrophilic (water-attracting) properties. When soap is mixed with water, the hydrophilic end of the soap molecule is attracted to the water molecules, while the hydrophobic end is repelled by the water and attracted to the oils and fats on surfaces like skin or clothes. This allows the soap to surround and lift away dirt and grime, which is then rinsed away with water.
The hydrophobic tail of soap molecules is responsible for their ability to dissolve fats and oily dirt by surrounding and lifting them away from surfaces, allowing them to be easily rinsed away with water.
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Hydrogen bromide is a gas in room temperature. It is soluble in water, forming hydrobromic acid. Identify the conjugate acid-base pairs.
HBr (g) + H₂O (1)→ H₂O* (aq) + Br (aq)
Select one:
O a. HBr-H₂O and H₂O* - Br
b. HBr-H₂O* and H₂O - Br
c. HBr-Br and H₂O-OH-
d. HBr-Br-and H₂O-H₂O*
Answers
The correct answer is option d. HBr-Br and H2O-H3O+ HBr and Br- form a conjugate acid-base pair, and H2O and H3O+ form another conjugate acid-base pair. The formation of hydrobromic acid (HBr) from HBr gas and water involves the transfer of a proton, leading to the formation of the conjugate acid (H3O+) and conjugate base (Br-).
In the given reaction, the following conjugate acid-base pairs can be identified: HBr (acid) and Br- (base)
HBr acts as an acid by donating a proton (H+) to form the bromide ion (Br-). This is the conjugate base of HBr.
H2O (base) and H3O+ (acid)
H2O acts as a base by accepting a proton (H+) to form the hydronium ion (H3O+). This is the conjugate acid of H2O.
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Can someone help me pls
I'LL GIVE BRAINLEST
Answers
Answer:
its will be 4 (B) I m not sure hope that help
Answer:
i think it might be C if not im sorry pls give brainliest.. but yea im pretty sure its C
Explanation:
How many grams of formaldehyde must be used to prepare 2. 5 L of 12. 3 M formalin?
Answers
To prepare 2.5 L of 12.3 M formalin, approximately 456.75 grams of formaldehyde must be used.
The molarity (M) of a solution is defined as the number of moles of solute per liter of solution. To determine the grams of formaldehyde needed, we need to use the equation:
grams = moles × molar mass
First, we need to calculate the moles of formaldehyde required:
moles = Molarity × Volume (in liters) = 12.3 M × 2.5 L = 30.75 moles
Next, we use the molar mass of formaldehyde, which is 30.03 g/mol, to calculate the grams:
grams = moles × molar mass = 30.75 moles × 30.03 g/mol ≈ 922.4775 grams
Rounding to the appropriate significant figures, approximately 456.75 grams of formaldehyde must be used to prepare 2.5 L of 12.3 M formalin.
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What must a scientist do in order to develop a testable hypothesis?
O A. Be certain that the data collected will fully support the hypothesis.
B. Find out whether the hypothesis can also explain untestable
claims.
C. Make sure that no other scientist has investigated the topic
before.
O D. Determine whether it is possible to gather the necessary data.
Answers
Answer:
A
Explanation:
Be certain that the data collected will fully support the hypothesis
Answer: D. Determine whether it is possible to gather the necessary data.
The average atomic mass or atomic weight found on the periodic table is
Answers
Answer:
the average mass of all isotopes of that element. It is located below the element symbol.
The average atomic mass or atomic weight on the periodic table is the average atomic mass of all the isotopes of that particular element.
What are isotopes?
Isotopes are defined as substances having same number of protons but different number of neutrons.Number of protons is characteristic for determining position of elements in the periodic table.
Since,all isotopes have the same number of protons and hence have same position.They have similar chemical properties as they have same number of electrons.
They find applications in the field of nuclear medicine and oil and gas research . There are 2 types of isotopes : stable and unstable
Unstable isotopes are radioactive and are called as radioisotopes.Some of these isotopes are man -made and hence also called as artificial isotopes.Every element has an isotope which is either man-made or natural .
Many properties of isotopes depend on mass which is measured in atomic mass unit. The difference in actual mass and mass number is called mass defect.
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the forces that moves against movement
Answers
Answer:
Friction
Explanation:
Draw the electron configuration for a neutral atom of vanadium.
Answers
The electronic configuration of vanadium can be written as, [Ar] 3d³ 4s²
as the neutral atom of vanadium is Argon.
The chemical element vanadium has the symbol V and atomic number 23. It is a hard, silvery-grey, malleable transition metal. The elemental metal is rarely found in nature, but once isolated artificially, the formation of an oxide layer somewhat stabilizes the free metal against further oxidation. Electron configuration is the arrangement of electrons in atomic orbitals. It shows the electrons in numbers, It doesn’t show the details on the spin of electrons like the orbital diagram. Electronic configuration of the Vanadium atom in ascending order of orbital energies,
1s2 2s2 2p6 3s2 3p6 4s2 3d3
The neutral atom of vanadium is Argon. so, the electronic configuration of vanadium can also be written as,
[Ar] 3d³ 4s²
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How many moles of Li3PO4 are in 2.2 L of a 0.6 M solution of Li3PO4? (remember Molarity=moles of solute/liters of solution)
Answers
Answer:
5 is the answer since I did this and got it rigt
A tank contains 1500 L of argon gas. The pressure is 11690 kPa and the temperature is 35ºC. How many moles of
argon are in the tank?
Show your work
Answers
Answer: 6,847.7 moles of Argon Gas
Explanation:
For this question, you need to use the Ideal Gas Equation (PV = nRT).
P is pressure (commonly in kPa or atm)V is volume occupied by the gas (in L)n is the number of moles, aka what we're trying to find here.R is the Ideal gas constant (8.314 (kPa*L)/(mol*K), or 0.0821 (atm*L)/(mol*K)T is the temperature (in Kelvins (K). In order to convert from Celsius to Kelvin, just add 273.)We can rearrange this equation to calculate the number of moles:
n = PV/RT
Then, we can plug in the values (Caution: we have to use 8.314 for our Ideal gas constant since P is in kPa for this question)
...and we have our answer! 6,847.7 moles of Argon Gas.
Also, make sure to adjust to significant figures!
Answer:
6843.99 mol (2 d.p.)
Explanation:
To calculate the number of moles of argon in the tank, we can use the Ideal Gas Law.
Ideal Gas Law\(\boxed{PV=nRT}\)
where:
P is the pressure measured in kilopascals (kPa).V is the volume measured in liters (L).n is the number of moles.R is the ideal gas constant (8.31446261815324 kPa L mol⁻¹ K⁻¹).T is the temperature measured in kelvin (K).First convert the given temperature from Celsius to kelvin by adding 273.15:
\(\implies \sf T=35+273.15=308.15\;K\)
Therefore, the values to substitute into the equation are:
P = 11690 kPaV = 1500 LR = 8.31446261815324 kPa L mol⁻¹ K⁻¹T = 308.15 KRearrange the formula to isolate n:
\(\implies n=\dfrac{PV}{RT}\)
Substitute the values into the formula and solve for n:
\(\implies n=\dfrac{11690 \cdot 1500}{8.3144626... \cdot 308.15}\)
\(\implies n=\dfrac{17535000}{2562.10165...}\)
\(\implies n=6843.99073...\)
\(\implies n=6843.99\; \sf mol\;(2\;d.p.)\)
Therefore, there are 6843.99 moles of argon in the tank (to two decimal places).
Most all compounds that contain carbon are organic compounds. An exception is
methane
glucose
carbon dioxide
ammonia
Answers
Answer:
carbon dioxide
it is an exception
hope it helps
water has density of 1.0 g/L. What volume of water has mass 250 g?
Answers
Answer:
Examine the units: If the density is 1 g/mL, how many mL do you need to make 250 g?
X mL * 1 g/mL = 250 g
Solve for X
x mL = 250 g / 1 g/mL = 250 mL
Hope this helps :)
The volume of water = 250 L
The formula for density:
\(density = \frac{mass}{volume}\)
Given, density = 1.0 g/L = 0.001 kg/L
mass = 250 g = 0.25 kg
Putting the values in the equation
\(0.001 = \frac{0.25}{volume}\)
\(volume = \frac{0.25}{0.001}\)
\(volume = 250 L\)
Hence, the volume of the water is 250 L.
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Describe the importance of the water cycle in the terms of;
i.improving water table
ii. regulating weather patterns
iii.provision of clean water
Answers
Answer:
ii.
Explanation:
Regulating weather patterns
Arrange the following amines in order of decreasing base strength. Rank from strongest to weakest base. To rank items as equivalent, overlap them. View Available Hint(s) NH3 (CH3)2NH CH3NH NH,Br Strongest base Weakest base The correct ranking cannot be determined. Submit Previous Answers Request Answer
Answers
The amines should be ranked in the following order, decreasing base strength Strongest base: NH3 (ammonia), (CH3)2NH (dimethylamine), and CH3NH (Methylamine) -NH,Br The weakest base.
What is the ranking of acidity?Results for "rate the acids in decreasing acid strength" as an image.
When Cl's oxidation state in its oxyacid increases, so will the acidity of the solution. The highest level of Cl oxidation is found in HClO4, which is followed by HClO3, HClO2, and HClO.
Which acid is the most potent and acidic?For instance, the pH of pure sulfuric acid is a staggering -12, while that of nitric acid is 1.08 and hydrochloric acid is at 1.6. As a result, sulfuric acid is the strongest "normal" acid you will come across.
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rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation is called
Answers
Rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation is called a neutralizer.
Waving Lotion / Solution is the one that softens and swells the cuticle layer then it breaks the disulfide bonds through the process of reduction.
Neutralizer is the substance that rehardens the newly arranged disulfide bonds as well as neutralizes any remaining waving lotion in the hair through oxidation.
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