Answer: B
Explanation: La respuesta es b porque su electricidad y no es un ácido.
Among the following characteristics the one which is not suits for acids is option C. because, acids cannot be neutralised by other acids and bases are required to neutralize acids.
What are acids?There are many concepts defining an acid. The Bronsted -Lowry concept of acids and bases states that, acids are substances which gives protons or H + ions and bases are proton acceptors.
Lewis concept says that, acids are electron acceptors and bases are electron donors. The pH range of acids is 1 - 6 and that of base is 8 to 12 and more.
Acids changes the color of litmus to red and a base make it blue. Acids and bases reacts together called neutralization and neutralising each other forming their neutral salts. Therefore, acids cannot be neutralised with an acid itself thus, option C is incorrect.
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The english translation of your question is as follows:
Which of the following is NOT a characteristic of acids?
A-Reacts with active metals to release hydrogen.
B-They conduct electricity.
C-Reacts with acids to neutralize their properties.
D-Changes litmus blue to red.
Which of the following masses represent 0.500 mol of the
indicated substance?
Answer: 103.6 g
Explanation:
On CK-12
From the data presented in the report sheet, you can deduce that the stoichiometric coefficient for oxygen is _______.
H20 (1) --> H2 (g) + O2 (g)
Answer: The stoichiometric coefficient for oxygen is [tex]\frac{1}{2}[/tex].
Explanation:
A number present on the front of an atom, ion or molecule in a chemical reaction equation is called a stoichiometric coefficient.
For example, [tex]H_{2}O(l) \rightarrow H_{2}(g) + \frac{1}{2}O_{2}(g)[/tex]
Here, the stoichiometric coefficient for [tex]H_{2}O(l)[/tex] is 1, for [tex]H_{2}(g)[/tex] is 1 and for [tex]O_{2}[/tex] is [tex]\frac{1}{2}[/tex].
Thus, we can conclude that the stoichiometric coefficient for oxygen is [tex]\frac{1}{2}[/tex].
how much corn syrup should be added to water to make 200 mL of a 10% by volume solution
To make 200 mL of a 10% by volume solution, add 20 mL corn syrup to water.
What is volume solution?Volume percent of a solution is defined as the ratio of the volume of solute present in a solution to the volume of the solution as a whole. It means that the volume of a closed figure determines how much three-dimensional space it can occupy. In terms of numerical value, volume is the amount of three-dimensional space enclosed by a closed surface. For example, a substance's space can be solid, liquid, gas, or plasma, or any other space-occupying shape. The volume percentage of a solution can be calculated by dividing the volume of solute by the volume of solution and multiplying the result by 100. The basic formula for volume is length width height, whereas the basic formula for area of a rectangular shape is length width height. The calculation is unaffected by how you refer to the various dimensions: you can, for example, use 'depth' instead of 'height.'To learn more about volume solution, refer to:
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2C4H10(g) + 1302(g) → 8CO2(g) + 10 H2O(g)
3. How many moles of water is produced from 0.859 moles of C4H10?
Answer:
Explanation:...
CONCLUSIONS
1. Why is it a problem if computer code has errors or mistakes?
Answer:
See below
Explanation:
It is a problem if a computer code has errors or mistakes because if they do, then the whole script will go wrong and chances are that your computer will not work. Each KB of data is crucial to letting the computer function properly. If one of the data is wrong, then the computer code won't work.
How can a healthcare professional reassure a patient nonverbally?
Answer:
A.
by explaining the patient’s chart
B.
by nodding at what the patient says
C.
by multitasking while speaking with the patient
D.
by writing down instructions for the patient to follow
Are the options.
Explanation:
C. Identify a set of four possible quantum numbers for the circled electron in manganese
(Mn). (There is more than one correct answer.)
Answer:
n = 3
l = 0, 1, or 2
m_l = -2, -1, 0 , 1 or 2.
m_s = +½ or -½
Explanation:
The atomic number of manganese is 25 and as such it's electron configuration is;
1s² 2s² 2p⁶ 3s² 3p⁶ 4s² 3d⁵
The circled electron is part of the 5 electrons in the 3d orbital.
In this place, the main energy level which is the principal quantum number is n = 3 while the azimuthal quantum number is l = 2.
Thus,l can either be 0, 1, or 2
Now; if l = 0, then it means ml = 0
if l = 2, then it means the magnetic quantum number m_l from - l to + l could be -2, -1, 0 , 1 or 2.
Also, we know that the spin quantum number m_s could be +½ or -½
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Calculate the specific heat of a substance given that 512 joules of heat is required to raise the temperature of 255.0 g of the substance by 15.0 ºC.
Answer:
[tex]c=0.133\ J/g^{\circ}C[/tex]
Explanation:
Given that,
Heat required, Q = 512 J
Mass of the substance, m = 255 g
The change in temperature, [tex]\Delta T=15^{\circ} C[/tex]
Let c be the specific heat of the substance. We know that the heat required to raise the temperature is given by :
[tex]Q=mc\Delta T[/tex]
Where
c is the specific heat of a substance
So,
[tex]c=\dfrac{Q}{m\Delta T}\\\\=\dfrac{512}{255\times 15}\\\\c=0.133\ J/g^{\circ}C[/tex]
So, the specific heat of the substance is equal to [tex]0.133\ J/g^{\circ}C[/tex].
In atmospheric chemistry, the following chemical reaction converts SO2, the predominant oxide of sulfur that comes from combustion of S-containing materials, to SO3, which can combine with H2O to make sulfuric acid (and thus contribute to acid rain): a. Write the expression for K for this equilibrium. b. Calculate the value of for this reaction using the values in either the back of your book or the CRC Handbook. c. Calculate the value of K for this equilibrium. d. If 1.00 bar of SO2 and 1.00 bar of O2 are enclosed in a system in the presence of some SO3 liquid, in which direction would the reaction run
Answer:
Explanation:
From the given information;
The chemical reaction can be well presented as follows:
[tex]\mathtt{SO_{2(g)} + \dfrac{1}{2}O_{2(g)} }[/tex] ⇄ [tex]\mathtt{3SO_{2(l)}}[/tex]
Now, K is known to be the equilibrium constant and it can be represented in terms of each constituent activity:
i.e
[tex]K = \dfrac{a_{so_3}}{a_{so_2} a_{o_2}^{\frac{1}{2}}}[/tex]
However, since we are dealing with liquids solutions;
[tex]K = \dfrac{1}{\dfrac{Pso_2}{P^0}\Big ( \dfrac{Po_2}{P^0} \Big)^{1/2}}[/tex] since the activity of [tex]a_{so_3}[/tex] is equivalent to 1
Hence, under standard conditions(i.e at a pressure of 1 bar)
[tex]K = \dfrac{1}{Pso_2Po_2^{1/2}}[/tex]
(b)
From the CRC Handbook, we are meant to determine the value of the Gibb free energy by applying the formula:
[tex]\Delta _{rxn} G^o = \sum \Delta_f \ G^o (products) - \sum \Delta_fG^o (reactants) \\ \\ = (1) (-368 \ kJ/mol) - (\dfrac{1}{2}) (0) - ((1) (-300.13 \ kJ/mol)) \\ \\ = -368 \ kJ/mol + 300.13 \ kJ/mol \\ \\ \simeq -68 \ kJ/mol[/tex]
Thus, for this reaction; the Gibbs frree energy = -68 kJ/mol
(c)
Le's recall that:
At equilibrium, the instantaneous free energy is usually zero &
Q(reaction quotient) is equivalent to K(equilibrium constant)
So;
[tex]\mathtt{\Delta _{rxn} G = \Delta _{rxn} G^o + RT In Q}[/tex]
[tex]\mathtt{0- \Delta _{rxn} G^o = RTIn K } \\ \\ \mathtt{ \Delta _{rxn} G^o = -RTIn K } \\ \\ K = e^{\dfrac{\Delta_{rxn} G^o}{RT}} \\ \\ K = e^{^{\dfrac{67900 \ J/mol}{8.314 \ J/mol \times 298 \ K}} }[/tex]
[tex]K =7.98390356\times 10^{11} \\ \\ \mathbf{K = 7.98 \times 10^{11}}[/tex]
(d)
The direction by which the reaction will proceed can be determined if we can know the value of Q(reaction quotient).
This is because;
If Q < K, then the reaction will proceed in the right direction towards the products.
However, if Q > K , then the reaction goes to the left direction. i.e to the reactants.
So;
[tex]Q= \dfrac{1}{Pso_2Po_2^{1/2}}[/tex]
Since we are dealing with liquids;
[tex]Q= \dfrac{1}{1 \times 1^{1/2}}[/tex]
Q = 1
Since Q < K; Then, the reaction proceeds in the right direction.
Hence, SO2 as well O2 will combine to yield SO3, then condensation will take place to form liquid.
Helium and air are contained in a conduit 7 mm in diameter and 0.08 m long at 44 deg C and 1 atm. The partial pressure of helium at one end of the tube is 0.075 atm and at the other end is 0.03 atm. Calculate the following for steady state equimolar counter diffusion. (a) Molar flux of He, (b) Molar flux of air, and (c) Partial pressure of helium at half way point of the conduit.
Solution :
[tex]$\text{Helium and nitrogen}$[/tex] gases are contained in a conduit [tex]$7 \ mm$[/tex] is diameter and [tex]$0.08 \ m$[/tex] long at 317 K (44°C) and a uniform constant pressure of 1 atm.
Given :
Diameter, D = 7 mm
L = 0.1 m
T = 317 K
[tex]$P_{A1}=0.075 \ atm $[/tex]
[tex]$P_{A2}=0.03 \ atm $[/tex]
P = 1 atm
From, table
[tex]$D_{AB}= 0.687 \times 10^{-4} \ m/s$[/tex]
We know :
[tex]$J_{A}^* = D_{AB} \frac{d_{CA}}{dz}$[/tex]
[tex]$J_A^*=\frac{(0.687 \times 10^{-4})(0.075-0.03)(\frac{101.32}{1 \ atm}) }{8.319 \times 298 \times 0.10}$[/tex]
= [tex]$1.26 \times 10^{-6} \ kgmol/m^r s$[/tex]
[tex]$P_{B1} = P-P_{A1}$[/tex]
= 1 - 0.075
= 0.925 atm
[tex]$P_{B2} = P-P_{A2}$[/tex]
= 1 - 0.03
= 0.97 atm
[tex]$J_B^*=D_{AB}\frac{(P_{B1} \times P_{B2})}{RT( \Delta z)}$[/tex]
[tex]$=\frac{0.687 \times 10^{-4}(0.925-0.97)(\frac{101.32}{1 \ atm})}{8.314 \times 298 \times 0.1}$[/tex]
[tex]$=-1.26 \times 10^{-6} \ kg \ mol /m^r s$[/tex]
Partial pressure of helium [tex]$=\frac{0.075+0.03}{2}$[/tex]
= 0.0525 atm
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Where are the majority of temperate grasslands located?
A interiors of continents
B along the coastline
C in desert regions
D between mountain ranges
Answer:
D. Between mountain ranges
Explanation:
Usually in between mountains is where the most grass is.
Answer:
in the interior of continents
Explanation:
How many atoms of chlorine are there in one molecule of carbon tetrachloride? (2 points)
1
2
3
4
Answer:
= 4Explanation:
A molecule of carbon tetrachloride contains one carbon and four chlorine atoms.Thus, a carbon atom will share each of its 4 outer electrons with a single chlorine atom, giving the single carbon atoms and 4 chlorine atoms a full outer shell of electrons.So 6.02 ×10²³ (that is equal to one mole) , molecules contain 4×6.02×10²³ atoms of chlorine i.e. 4moles chlorine. So we can write one mole of ccl4 molecule have 4 moles of chlorine atombranliest plsChemistry Help (Naming Oxyacids Chart)
Answer:
HClO₃ /chloric acid /suffix -ic/ ClO₃⁻ (chlorate)
HClO₂/ chlorous acid/ suffix -ous/ ClO₂⁻ (chlorite)
HNO₃ /nitric acid /suffix -ic/ NO₃⁻ (nitrate)
HNO₂/ nitrous acid/ suffix -ous/ NO₂⁻ (nitrite)
Explanation:
Chlorine has 4 positive oxidation numbers to form oxyacids: +1, +3, +5 and +7.
When it uses the oxidation number +5, it forms HClO₃, which is named chloric acid, with the suffix -ic. When it loses an H⁺, it forms the oxyanion ClO₃⁻ (chlorate).When it uses the oxidation number +3, it forms HClO₂, which is named chlorous acid, with the suffix -ous. When it loses an H⁺, it forms the oxyanion ClO₂⁻ (chlorite).Nitrogen has 2 positive oxidation numbers to form oxyacids: +3 and +5.
When it uses the oxidation number +5, it forms HNO₃, which is named nitric acid, with the suffix -ic. When it loses an H⁺, it forms the oxyanion NO₃⁻ (nitrate).When it uses the oxidation number +3, it forms HNO₂, which is named nitrous acid, with the suffix -ous. When it loses an H⁺, it forms the oxyanion NO₂⁻ (nitrite).What volume of O2 is required to react with CS2 to produce 4 liters of CO2?
Answer:
12 L of O₂
Explanation:
We'll begin by writing the balanced equation for the reaction. This is illustrated below:
CS₂ + 3O₂ —> CO₂ + 2SO₂
From the balanced equation above,
3 L of O₂ reacted to produce 1 L of CO₂.
Finally, we shall determine the volume of O₂ required to produce 4 L of CO₂. This can be obtained as follow:
From the balanced equation above,
3 L of O₂ reacted to produce 1 L of CO₂.
Therefore, xL of O₂ will react to produce 4 L of CO₂ i.e
xL of O₂ = 3 × 4
xL of O₂ = 12 L
Thus, 12 L of O₂ is needed for the reaction.
The sudden disappearance of a type of fossil record is evidence of
Answer:
It's evidence of a likely mass extinction.
Within an ecosystem, the sudden disappearance of a type of fossil record is evidence of mass extinction.
What is an ecosystem?Ecosystem is defined as a system which consists of all living organisms and the physical components with which the living beings interact. The abiotic and biotic components are linked to each other through nutrient cycles and flow of energy.
Energy enters the system through the process of photosynthesis .Animals play an important role in transfer of energy as they feed on each other.As a result of this transfer of matter and energy takes place through the system .Living organisms also influence the quantity of biomass present.By decomposition of dead plants and animals by microbes nutrients are released back in to the soil.
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A cylinder of Krypton has contains 17 L of Ar at 22.8 atm and 112 degrees celsisus. How many moles are in the cylinder?
Given :
A cylinder of Krypton has contains 17 L of Ar at 22.8 atm and 112 degrees Celsius.
To Find :
How many moles are in the cylinder.
Solution :
We know, by ideal gas equation :
[tex]PV = nRT\\\\n = \dfrac{PV}{RT}[/tex]
Here, R is gas constant and [tex]R = 8.205 \times 10^{-5} \ m^3\ atm\ K^{-1} mol^{-1}[/tex]
Converting all given in required units and putting in above equation, we get :
[tex]n = \dfrac{P\times V}{ R \times T}\\\\n = \dfrac{22.8 \times 0.017}{8.205\times (112+273)}\ moles\\\\n = 1.22 \times 10^{-4} \ moles[/tex]
Hence, this is the required solution.
If 5.00 g of Gas A and 5.00 g of Gas B are mixed in the same container, and the partial pressure of Gas B is determined to be twice that of Gas A, what do we know about the gases? A) Gas A has half the molar mass of Gas B. B) Gas A has twice the molar mass of Gas B. C) Gas A has a higher temperature than Gas B. D) Gas A takes up twice the volume in the vessel than Gas B.
Answer:
B) Gas A has twice the molar mass of Gas B.
Explanation:
Partial pressure of a gas is defined as the moles of the gas/ Total moles of the mixture times total pressure. The equation is:
Partial pressure A = Moles A / total moles * Total pressure
From the definition, we can say that the moles of the gas A are twice the moles of B:
2 Moles A = Moles B
As the mass of both gases is the same but the moles of B are twice the moles of A:
The molar mass of A is twice the molar mass of B
Right answer is:
B) Gas A has twice the molar mass of Gas B.We have that for the Question " what do we know about the gases?"
It can be said that
B) Gas A has twice the molar mass of Gas B [tex]M_A=2M_B[/tex]
From the question we are told
5.00 g of Gas A and 5.00 g of Gas B are mixed in the same container, and the partial pressure of Gas B is determined to be twice that of Gas A
The equation for partial pressure gasA and gasB is given as
[tex]Partial Pressure = \frac{number of moles of }{Total no of moles of gas}[/tex]
That results to,
[tex]\frac{Partial pressure of A}{Partial pressure of B} = \frac{no of moles of A}{no of moles of B}[/tex]
[tex]= \frac{Given mass A}{Molar mass A} * \frac{Molar mass B}{Given mass B}\\\\= \frac{1}{2} = \frac{5*M_B}{M_A*5}\\\\= \frac{1}{2} = \frac{M_B}{M_A}\\\\= M_A = 2M_B[/tex]
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I need assistance on this
Answer:
Fe18C2?
not sure
cuz there is 18 Fe and 2CWhat is the mass of 9.23*10^41 atoms of phosphorus (P)?
(Put your answer in scientific notation)
Answer:
[tex]m_P=4.75x10^{19}g\ P[/tex]
Explanation:
Hello there!
In this case, according to the given atoms of phosphorous, it is possible to calculate the mass of those atoms by bearing to mind the definition of mole in terms of the Avogadro's number; which refers to the mass and amount of particles in one mole of any element as equal to the atomic mass and the Avogadro's number respectively:
[tex]1 molP=6.022x10^{23}atoms\ P=30.97gP[/tex]
Which is used to obtain the required mass of P:
[tex]m_P=9.23x10^{41}atoms\ P*\frac{30.97g P}{6.022x10^{23}atoms\ P}\\\\m_P=4.75x10^{19}g\ P[/tex]
Regards!
A sample of 4.5 moles of hydrogen is used to react how many grams of nitrogen trihydride will be produced
Answer:
51.1 g NH3
The required chemical reaction is given by:
N2 + 3H2 --> 2NH3
4.5 mol H2 × (2 mol NH3/3 mol H2) = 3 mol NH3
molar mass of NH3 is 17.031 g/mol
3 mol NH3 × (17.031 g NH3/1 mol NH3) = 51.1 g NH3
(07.02 LC)
Which of the following statements is true about the specific heat capacity of a
substance?
It is higher for good conductors.
It is an intensive physical property.
It depends on the melting point of substance.
It depends on the amount of substance.

Answer:
It is an intensive physical property.
Explanation:
I searched it up
The true statement related to the specific heat capacity of a substance is an intensive physical property.
What is specific heat capacity?The heat capacity should based on the mass of the substance and it have the extensive property.
However, specific heat is the heat capacity per unit mass and it should create the independent of substance amount.
So we can say that specific heat is the intensive property.
Hence the second option is correct.
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2. If I have 7.70 moles of gas at a pressure of 202.6 kPa, and a temperature of 59.0°C, what is the
volume of the container that the gas is in?
Answer:
V = 0.104 m³
Explanation:
Given that,
Number of moles, n = 7.70 moles
Pressure, P = 202.6 kPa
Temperature, T = 59.0°C = 332 K
We need to find the volume of the container that the gas. We know that the ideal gas law is as follows :
[tex]PV=nRT\\\\V=\dfrac{nRT}{P}[/tex], R =8.314 m³-Pa/K-mol
Put all the values,
[tex]V=\dfrac{7.7\times 8.314\times 332}{202.6 \times 10^3}\\\\V=0.104\ m^3[/tex]
So, the volume of the container is equal to 0.104 m³.
It takes 38.5mL of 0.753M NaOH solution to completely neutralize 155mL of a sulfuric acid. What is the concentration of the sulfuric acid?
Answer:
The correct solution is "93.48 M".
Explanation:
According to the question,
The number of moles of NaOH will be:
= [tex]0.753\times 38.5[/tex]
= [tex]28.99 \ mol[/tex]
The number of moles of needed [tex]H_2SO_4[/tex] will be:
= [tex]\frac{1}{2}\times 28.99[/tex]
= [tex]14.49 \ mol[/tex]
hence,
The concentration of [tex]H_2SO_4[/tex] solution will be:
= [tex]\frac{Number \ of \ moles}{Volume \ of \ solution}[/tex]
= [tex]\frac{14.49}{0.155}[/tex]
= [tex]93.48 \ M[/tex]
What is the mass of 7.03 x 10- molecules of magnesium nitrate?
Answer:
173.5 g
Explanation:
This question seems incomplete, as the power by which 10 is increased is missing. I will answer this question assuming the given number of molecules is 7.03x10²³ molecules. A different number of molecules will give a different answer, but the procedure remains the same.
First we convert the given number of molecules into moles, using Avogadro's number:
7.03x10²³ molecules ÷ 6.023x10²³ molecules/mol = 1.17 molThen we convert magnesium nitrate moles into grams, using its molar mass:
1.17 mol * 148.3 g/mol = 173.5 ga chemical property of a mineral is a evident if the mineral 1 breaks easily when struck with a hammer 2 bubbles when acid is placed on it 3 is easily scratched by a fingernail 4 reflects light from its surface
Answer:
2. bubbles when acid is placed on it.
Explanation:
Minerals can be defined as any form of naturally occurring, inorganic solid substance characterized by a crystal structure. Also, minerals are homogeneous in nature with a defined chemical composition and characterized by a crystal structure comprising of ions, atoms, or molecules in an orderly arrangement.
Generally, molecules attach on the inside of a mineral to give it shape. Therefore, the molecule of a mineral is a crystal three-dimensional regular structure (arrangement) of chemical particles that are bonded together and determines its shape.
Due to the fact that these molecules are structurally arranged or ordered and are repeated by different symmetrical and translational operations they determine the shape of minerals.
Additionally, inorganic-crystalline substances which are found naturally within earth are referred to as minerals. Some examples of minerals are iron, copper, aluminum, tin, coal, quartz, feldspar, mica, etc.
The chemical composition or property of a mineral reflect the presence and arrangement of atoms in each. Also, it determines the color and density of a mineral.
In Science, the chemical property of a mineral is evident if the mineral produces a bubble when an acid such as hydrochloric acid (HCl) is placed on it.
Answer: 2
Explanation:
Because the acid bubbles help the mineral break down
The titration of HCl with NaOH is an example of:
A. a weak acid-weak base titration,
B. a weak acid-strong base titration.
c. a strong acid-strong base titration.
D. a strong acid-weak base titration.
Answer:
I’m pretty sure it’s C
Explanation:
AP Ex
Fast, slow, why do some reactions occur faster than others?
Answer:
When the concentration of a reactant increases, there will be more chemical present. Due to more reactant particles moving together, more collisions are allowed to happen and with that, the rate of the reaction is increased. So, the higher the concentration of reactants, the faster the reaction rate will be.
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how many moles of solute are needed to make 250 mL of a 0.50 M solution of sodium phosphate
Answer:
0.125 moles of solute
Explanation:
The formula for molarity (M) is moles of solute/liters of solution. First, convert 250 mL into liters:
250 mL/1 * 1 L/1000 mL = 0.25 L.
Then, plug in the values of m/L = M
m/0.25 = 0.5
Solve for moles (m). You would multiply 0.5 by 0.25.
m = 0.125
Lastly, if you'd like to check it and see if it's correct, do 0.125/0.25, and you should get 0.5 M.
Answer:
[tex]\boxed {\boxed {\sf 0.125 \ mol }}[/tex]
Explanation:
Molarity is a measure of concentration. It is the moles of solute per liters of solution.
[tex]molarity = \frac{ moles \ of \ solute}{ liters \ of \ solution}[/tex]
We know the solution has a molarity of 0.5 M or moles per liter. There are 250 milliliters of solution. First, we need to convert to liters. 1 liter is equal to 1000 milliliters.
[tex]\frac {1 \ L}{ 1000 \ mL}[/tex][tex]250 \ mL *\frac {1 \ L}{ 1000 \ mL}[/tex][tex]\frac {250 }{ 1000 } \ L = 0.25 \ L[/tex]Now we can substitute the values we know into the formula.
molarity= 0.5 mol/L liters of solution = 0.25 Lmoles of solute=x (unknown)[tex]0.5 \ mol/L= \frac{ x}{0.25 \ L}[/tex]
Since we are solving for the moles of solute, we need to isolate the variable x. It is being divided by 0.25 L. The inverse of division is multiplication. Multiply both sides by 0.25 L.
[tex]0.25 \ L *0.5 \ mol/L= \frac{ x}{0.25 \ L}*0.25 \ L[/tex]
[tex]0.25 \ L * 0.5 \ mol/L =x[/tex]
[tex]0.25 * 0.5 \ mol=x[/tex]
[tex]0.125 \ mol =x[/tex]
0.125 moles of sodium phosphate are needed to make 250 mL of a 0.50 M solution.
If you have 2.86 gallons of pure water, how many molecules of water are ionized at any given time ?
Answer:
The molar mass of water is 18 grams per mole. So in 18 grams of water, there are 6.02 x 1023 molecules.
One gallon of water is equal to 3.7854118 liters. If we assume that the water is at 4 °C (to keep things simple), the density of water is exactly 1 gram per milliliter, or 1 kilogram per liter. So 1 gallon of water at 4 °C weighs exactly 3.7854118 kilograms, or 3785.41118 grams.
If one mole of water weighs 18 grams, then there are 210.30 moles of water in a gallon. Since one mole of water is made up of 6.02 x 1023 molecules, in one gallon of water there are 1.266 x 1026 molecules.
That is: 126600000000000000000000000 molecules!
If we multiply that by the number of atoms in a single water molecule -- 3 atoms -- then we get:
379800000000000000000000000 atoms!
The number of ionized water molecules at any given time in 2.86 gallons of pure water is approximately 2.08 x 10¹¹ molecules.
In pure water, only a small portion of water molecules are capable of self-ionization, which causes them to separate into hydronium ions (H3O+) and hydroxide ions (OH-). This procedure can be reversed.
The self-ionization of water can be represented as:
H₂O ⇌ H₃O+ + OH⁻
The concentration of each ion can be calculated using the equilibrium constant for water, Kw.
Kw = [H₃O⁺][OH⁻] = 1.0 x 10⁽⁻¹⁴⁾ at 25°C
Since the concentration of H³O⁺ ions is equal to the concentration of OH⁻ ions in pure water, let's assume that each concentration is x.
So, x² = 1.0 x 10⁽⁻¹⁴⁾
Taking the square root of both sides,
x = √(1.0 x 10⁽⁻¹⁴⁾)
≈ 1.0 x 10⁽⁻⁷⁾ M
The concentration of H₃O⁺ and OH⁻ ions in pure water is approximately 1.0 x 10^(-7) M.
To find the number of ionized water molecules,
= concentration x Avogadro's number x volume
= (1.0 x 10⁽⁻⁷⁾ M) x (6.022 x 10²³ molecules/mol) x (2.86 gallons) x (3.78541 liters/gallon)
≈ 2.08 x 10¹¹ molecules.
So, approximately 2.08 x 10¹¹ molecules of water are ionized.
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#SPJ2
What is the formula for tin(IV) sulfide?
A. Sn4S
B. SnS2
C. Sns
D. SnS4
Answer:
[tex]SnS_{2}[/tex]
Explanation:
The formula for tin(IV) sulfide is SnS[tex]_{2}[/tex]