Answer: The ratio of number of hydroxide ions to iodide ions is 2 : 1.
Explanation:
The chemical equation for the oxidation of iodide ion is oxidized to hypoiodite ion by permanganate follows:
[tex]2MnO_4^-+I^-+H_2O\rightarrow 2MnO_2(s)+IO_3^{-}+2OH^{-}[/tex]
According to mole concept:
1 mole of a substance contains [tex]6.022\times 10^{23}[/tex] number of particles
Moles of iodide ions = 1 mole
Number of iodide ions = [tex](1\times 6.022\times 10^{23}[/tex]
Moles of hydroxide ions = 2 mole
Number of hydroxide ions = [tex](2\times 6.022\times 10^{23}[/tex]
Taking the ratio of number of hydroxide ions and number of iodide ions are as follows:
[tex]\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{(2\times 6.022\times 10^{23})}{(1\times 6.022\times 10^{23})}\\\\\frac{\text{Number of hydroxide ions}}{\text{Number of iodide ions}}=\frac{2}{1}[/tex]
Hence, the ratio of number of hydroxide ions to iodide ions is 2 : 1.
How could solar flares affect the Earth's communication?
Answer:Solar flares have been known to affect electronic communication because their energy stirs up the Earth's upper atmosphere.
Explanation:
18. Describe cementation
Select the correct answer.
How are ionic bonds formed?
A.
by the disintegration of one or more electrons
B.
by the sharing of one or more electrons between two atoms
C.
by the transfer of one or more electrons from one atom to another
D.
by the disintegration of one or more protons
Answer: b
Explanation:
This is a measure of mass per unit volume.
Answer:
Density
Explanation:
Density is defined as the mass per unit volume. It is the ratio between the mass and the volume of a substance. It does not matter how large or small a sample of matter is, the same substance will always have the same density, because of this. The ratio between the mass and volume remains the same.
Please help with this assignment!
Answer:
im pretty sure 18 is eye
Explanation:
group 1 elements tend to react with group ___ elements to form ___
Answer:
Group 1 elements tend to react with group Group 17 elements to form alkyl halide.
A certain chemical reaction 444 kj releases of heat energy per mole of reactant consumed. Suppose some moles of the reactant are put into a calorimeter (a device for measuring heat flow). It takes of heat energy to raise the temperature of this calorimeter by . Now the reaction is run until all the reactant is gone, and the temperature of the calorimeter is found to rise by . How would you calculate the number of moles of reactant that were consumed
Complete question is;
A certain chemical reaction 444 kj releases of heat energy per mole of reactant consumed. Suppose some moles of the reactant are put into a calorimeter (a device for measuring heat flow). It takes 4.68 J of heat energy to raise the temperature of this calorimeter by 6.9 °C. Now the reaction is run until all the reactant is gone, and the temperature of the calorimeter is found to rise by . How would you calculate the number of moles of reactant that were consumed
Answer:
7.27 × 10^(-5) moles
Explanation:
We are given;
Heat energy = 444 kJ/mol
Final Temperature = 6.9 °C
Heat capacity = 4.68 J/°C
Let's calculate the heat generated from the formula;
Heat generated = heat capacity × final temperature
Heat generated = 4.68 × 6.9 = 32.292 J = 32.292 × 10^(-3) KJ
Now, the number of moles of reactant that were consumed is gotten from;
No_ of moles of rctnt consumed = heat energy generated/heat energy used = (32.292 × 10^(-3))/444 = 7.27 × 10^(-5) moles
Part B
With the slope being 1.50, with the points passing through points(0,3) and (4,9). What is the value of b?
The value of b : 3
Further explanationGiven
slope=m=1.5
points (0,3) and (4,9)
Required
The value of b
Solution
the Equation of a Line : y = mx + b
m = slope
b = constant
Find the slope :
m = (y₂-y₁)/(x₂-x₁)
m = (9-3)/(4-0)
m = 6/4
For the point that the line passes through : (0,3) then the equation :
3=6/4.0+b
3=b
And the equation :
y = 6/4x+3
Is it easier for an atom to lose a proton or a neutron?why or why not
will brain list
Answer:
No
Explanation:
It is not easier for an atom to lose a proton or a neutron because these particles are held together by very strong nuclear forces within the atom.
Protons are positively charged particles
Neutrons do not carry any charges.
In the nucleus of an atom, both protons and neutrons can be found.
As with both particles, the very strong attractive force makes them very difficult to remove in ordinary chemical reactions.
Nuclear forces are one of the strongest forces that keeps an atom especially the nucleus together. Only in nuclear reactions to we encounter a situation where nuclear materials are changed, in that regard the properties of the atom also changes.
25.1 g express as an integer
Answer:
25 g
Explanation:
Integers are positive or negative whole numbers together with zero. This definition implies that 25.1 g is not an integer.
Seeing that .10 is less than .50, we have to round 25.10 down to 25.
Hence, if i express 25.10g as an integer, i end up with 25 g
Someone please help me
Answer:
ELECTROMAGNETIC MICROSCOPEExplanation:
I HOPE IT HELPS :)
What volume of carbon dioxide gas at STP is required to produce 456.9g of lithium carbonate? PLEASE EXPLAIN HOW YOU GOT THE ANSWER
Answer:
V = 138.68 L
Explanation:
Given data:
Volume of CO₂ at STP required = ?
Mass of lithium carbonate produced = 456.9 g
Solution;
Chemical equation:
2LiOH + CO₂ → Li₂CO₃ + H₂O
Number of moles of Li₂CO₃ produced:
Number of moles = mass/molar mass
Number of moles = 456.9 g/ 73.89 g/mol
Number of moles = 6.184 mol
now we will compare the moles of Li₂CO₃ with CO₂ from balanced chemical equation to get number of moles of CO₂ reacted.
Li₂CO₃ : CO₂
1 : 1
6.184 : 6.184
Thus, 6.184 moles of CO₂ reacted.
Volume of CO₂:
PV = nRT
R = general gas constant = 0.0821 atm.L /mol.K
1 atm × V = 6.184 mol ×0.0821 atm.L /mol.K × 273.15 K
V = 138.68 atm.L / 1 atm
V = 138.68 L
Calculate the average rate of decomposition of NH4NO2 by the reaction 2NH4O5(aq) --> N2(g) H2O(g) at the following time interval. At time 250 s, the concentration of NH4NO2 is 4.12 M. At time 330 s, the concentration of NH4NO2 is 1.48 M
Answer:
[tex]r=-0.033\frac{M}{s}[/tex]
Explanation:
Hello!
In this case, since the average rate of reaction is computed as a change given by:
[tex]r=\frac{\Delta [NH_4NO_2 ]}{\Delta t}[/tex]
In such a way, given the concentrations at the specified times, we plug them in to obtain:
[tex]r=\frac{(1.48M-4.12M)}{(330s-250s)}\\\\r=-0.033\frac{M}{s}[/tex]
Whose negative sign means the concentration decreased due to the decomposition.
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Answer:
0.028578 km
Explanation:
The following data were obtained from the question:
Length of whale (in mm) = 28578 mm
Length of whale (in km) =?
We can convert 28578 mm to km by doing the following:
Recall:
1 mm = 1×10¯⁶ Km
Therefore,
28578 mm = 28578 mm × 1×10¯⁶ Km / 1 mm
28578 mm = 0.028578 km
Thus, 28578 mm is equivalent to 0.028578 km
The length of whale (in km) = 0.028578 km
A chemist must prepare 575.mL of 1.00M aqueous sodium carbonate Na2CO3 working solution. He'll do this by pouring out some 1.58M aqueous sodium carbonate stock solution into a graduated cylinder and diluting it with distilled water. Calculate the volume in mL of the sodium carbonate stock solution that the chemist should pour out. Round your answer to 3 significant digits.
Answer : The volume in mL of the sodium carbonate stock solution is 364 mL.
Explanation :
According to dilution law:
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of aqueous sodium carbonate
[tex]M_2[/tex] = molarity of aqueous sodium carbonate stock solution
[tex]V_1[/tex] = volume of aqueous sodium carbonate
[tex]V_2[/tex] = volume of aqueous sodium carbonate stock solution
Given:
[tex]M_1[/tex] = 1.00 M
[tex]M_2[/tex] = 1.58 M
[tex]V_1[/tex] = 575 mL
[tex]V_2[/tex] = ?
Now put all the given values in the above formula, we get:
[tex]1.00M\times 575mL=1.58M\times V_2[/tex]
[tex]V_2=363.92mL\approx 364mL[/tex]
Therefore, the volume in mL of the sodium carbonate stock solution is 364 mL.
What is the probability of having major earthquakes or volcanoes occur in New York State?
Answer:
New York City is susceptible to at least a magnitude 5 earthquake once every 100 years.
Explanation:
The probability of having major earthquakes or volcanoes occur in New York State is at least, one magnitude 5 earthquake can occur in New York City once every 100 years.
What is earthquakes ?When two chunks of the ground abruptly slide past one another, an earthquake results. The fault or fault plane is the area where they slide.
Earthquakes often result from subsurface rock breaking unexpectedly and fast movement along a fault. The seismic waves that cause the ground to tremble are brought on by this quick release of energy.
The Circum-Pacific Belt, often known as the Ring of Fire, is a region in the Pacific Ocean marked by active volcanoes and frequent earthquakes. The Ring of Fire is where most of Earth's earthquakes and volcanoes occur.
Thus, at least, one magnitude 5 earthquake can occur in New York City once every 100 years.
To learn more about earthquakes, follow the link;
https://brainly.com/question/1176195
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What relationships between temperature and viscosity of water?
Answer:
As the temperature heats up then the viscosity is much higher, as defined in stress analysis and fluid mechanics. Reynolds number describes the speed and the inverse proportion.
Iron reacts with oxygen to produce iron oxide rust this reaction is representative in an equation as to FE plus XO22FE203 identify the value of X that will balance this equation
The balanced equation :
4Fe + 3O₂⇒ 2Fe₂O₃
Further explanationGiven
Rust reaction
Required
Balanced equation
Solution
Reaction
Fe + O₂⇒ 2Fe₂O₃
For a simple equation where one of the reaction coefficients is known, we can immediately add the corresponding coefficient using the principle that the number of atoms of the components in the reactants and products is the same.
In the above reaction :
Fe, left=1, right = 4, so coefficient in the left=4
O, left=2, right = 6, so coefficient in the left=3
choose all the following that are properties of gases
Answer:
compressible.
definite volume.
low density.
indefinite shape.
A certain type of decorative lamp contains colored liquids from globs that break off and rise to the top of the liquid.the globs rise due to
Answer:
Convection.
Explanation:
Due to the heat of the lamp, the liquid increases its temperature. This increase produces an increase in the energy and volume of the globs. But it also causes a decrease in the density of the bubble. As a result, they break off and rise to the top. We can see that the globs rise owing to convection because there is a transfer of heat in the fluid caused by the movement of the fluid's molecules with more energy towards the surface, where the molecules have less energy and are colder.
how does the electron configuration of sulfur end
Which statement applies only to magnetic force instead of both electric and
magnetic forces?
A. It can push objects apart.
B. It can pull objects together.
C. It acts between objects that do not touch.
D. It acts between a north pole and a south pole.
SUBMIT
Please help!!! I’ll mark brainlist
I NEED THIS TODAY, PLEASE HELP.
Write the following elements in decreasing ionic size. Li+, C4+, F-, O2-
70 POINTS
Answer:
Li+, C4+, O2-, and then F- They're written in decreasing ionic size.
Explanation:
Ionic size means the same thing as ionic radius. Furthermore, Ionic radius is the distance away from the central atom. Ionic radius increases going from top to bottom and decreases across the periodic table.
Lithium is in the 1st family/group with a charge of +1. So it has the biggest ionic radius.
Carbon is in the 4th family/group with a charge of +4. So it has a smaller ionic radius than Lithium.
Oxygen is in the 6th family/group with a charge of -2. So it has a smaller ionic radius than Carbon.
Lastly, Fluorine is in the 7th family/group with a charge of -1. So it has a smaller ionic radius than Oxygen.
Which statement describes a similarity between asexual reproduction and sexual reproduction?
A.) Both processes involve fertilization.
B.) Both processes involve cell division.
C.) Both processes produce genetically identical offspring.
D.) Both processes require two parents.
Answer:
the answer to the question is B!
Studying the decay of radioactive isotopes in dead organisms helps scientists to identify fossilized remains. The ratio of C-12 to C-14 in the atmosphere is 1 x 1012. The table shows this ratio inside the body of three organisms.
C12/C14 Ratio
Organism C12/C14 Ratio
X 8 x 1012
Y 2 x 1012
Z 1 x 1012
What can most likely be concluded from the above information?
Only Organism Z is alive, and Organism X has been dead longer than Organism Y.
Only Organism Z is alive, and Organism Y has been dead longer than Organism X.
Only Organism X is alive, and Organism Y has been dead longer than Organism Z.
Only Organism X is alive, and Organism Z has been dead longer than Organism Y.
Answer:
Only Organism Z is alive, and Organism X has been dead longer than Organism Y.
Explanation:
After the death of an organism, there is radioactive disintegration of C-14 allotrope of carbon, which increases the ratio of C-12 to C-14 in a dead organism as compared to a living organism.
The study of chemistry and its bond is called chemistry.
The correct answer is A
After the death of an organism, there is radioactive disintegration occurs which leads to the breakdown of C-14 allotrope of carbon into the other isotopes,
Breakdown of these isotopes leads to the increase in the ratio of C-12 to C-14 in a dead organism as compared to a living organism.
Hence, the correct answer is A that is Only Organism Z is alive, and Organism X has been dead longer than Organism Y.
For more information, refer to the link:-
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what is the chemical formula for hydrogen phosphate
Answer:
Explanation:
The chemical formula for hydrogen phosphate is HPO₄²⁻
A substance joined by this type of bond will conduct electricity when in?
Answer:
C.) If the solid is conductive, the bonds are metallic.
1) Substances with ionic bond conduct an electric current in liquid, but not in solid state, because in liquids ions are mobile, contrary to solids where ions are fixed.
2) Substances with covalent bond not conduct an electric current in liquid and solid state, because they not have free ions or electrons.
3) Substances with metallic bond conduct an electric current in liquid and solid state, because they have mobile electrons. Most metals have strong metallic bond, because strong electrostatic attractive force between valence electrons (metals usually have low ionization energy and lose electrons easy) and positively charged metal ions.
Explanation:
Air resistance prevents the driver from moving in a straight line once she jumps from the platform.
True or False
Answer:
true
Explanation:
Newton's third law states that for every action, there is an ______ and ____ reaction force and that forces come in ____
Answer:
Newton's third law of motion states that every action, there is an equal and opposite reaction force and that forces come in pairs