You would need 12.5 mL of 0.400 M KCl to make a 0.0500 M solution of KCl when diluted to 200.0 mL with water.
To calculate the amount of KCl needed, you can use the formula:
M1V1 = M2V2
Where:
M1 = initial concentration (0.400 M)
V1 = initial volume (unknown)
M2 = final concentration (0.0500 M)
V2 = final volume (200.0 mL)
Rearranging the formula, we get:
V1 = (M2V2) / M1
Substituting the values, we get:
V1 = (0.0500 M x 200.0 mL) / 0.400 M = 25.0 mL
However, this is the volume needed to make a 0.0500 M solution without dilution. To dilute the solution, we need to add 25.0 mL of 0.400 M KCl to (200.0 mL - 25.0 mL) = 175.0 mL of water, which gives:
V1 = (0.400 M x 25.0 mL) / (200.0 mL) = 0.0500 M x (200.0 mL - 25.0 mL) / 25.0 mL = 12.5 mL
So we would need 12.5 mL of 0.400 M KCl to make a 0.0500 M solution of KCl when diluted to 200.0 mL with water.
For more questions like KCl click the link below:
https://brainly.com/question/22595803
#SPJ11
A mothball, composed of naphthalene (C10H8) has a mass of 1.86 g. How many naphthalene molecules does it contain? Express your answer in molecules to three significant figures.
Answer:
1.476 mol molecules
Explanation:
you are titrating 20.00 ml of 0.0100 m sn2 in 1 m hcl with 0.0500 m tl3 resulting in the formation of sn4 and tl . a pt indicator electrode and a saturated ag|agcl reference electrode are used to monitor the titration. what is the balanced titration reaction?
The balanced titration reaction for the given reaction involving 0.0100 M Sn2+ in 1 M HCl with 0.0500 M Tl3+ is as follows:
2 Sn2+ (aq) + 3 Tl3+ (aq) → 2 Sn4+ (aq) + 3 Tl+ (aq)
The balanced titration reaction for the titration of 20.00 ml of 0.0100 m Sn2 in 1 m HCl with 0.0500 m Tl3 resulting in the formation of Sn4 and Tl can be written as:
2 Sn2+ + 2 Tl3+ + 2 H+ → 2 Sn4+ + 2 Tl+ + H2
The Pt indicator electrode and the saturated Ag|AgCl reference electrode are used to monitor the titration process.
1. Identify the reactants: Sn2+ and Tl3+
2. Identify the products: Sn4+ and Tl+
3. Balance the charges: 2 Sn2+ ions have a total charge of +4, while 3 Tl3+ ions have a total charge of +9. To balance the charges, multiply Sn2+ by 2 and Tl3+ by 3.
4. Write the balanced equation: 2 Sn2+ (aq) + 3 Tl3+ (aq) → 2 Sn4+ (aq) + 3 Tl+ (aq)
Learn more about balanced titration reaction
brainly.com/question/28393449
#SPJ11
What is the acceleration due to gravity at Earth's surface?
Answer:
9.8 m/s2
Explanation:
That is to say, the acceleration of gravity on the surface of the earth at sea level is 9.8 m/s2.
The distance between the nuclei of two carbon atoms in its elemental form is
(a) 77 pm
(b) 154 pm
(d) 120 pm
(c) 17 pm
Answer:
its B: 154.
Explanation:
the bond lenth between two atoms in a molecule depends not only on the atoms but also on such factors as the orbital hybridzation and the electronic and steric nature of the substituents. the carbon-carbon (C-C) bond length in diamonds is 154 pm.
The distance between the nuclei of two carbon atoms in its elemental form is 154pm.
What is distance?Distance is a numerical measurement of how far the objects or points are. It is the actual length of the path travelled from one point to another.
What is nuclei?Nuclei is a plural form of nucleus. The nucleus is a collection of particles like protons, which are positively charged and neutrons, which are electrically neutral.
The carbon–carbon (C–C) bond length in diamond is 154 pm. It is the average length for a carbon–carbon single bond and it is also the largest bond length that exists for ordinary carbon covalent bonds.
Therefore, the distance between the nuclei of two carbon atoms in its elemental form is 154pm.
Hence, option b is the answer.
To learn more about distance and nuclei here
https://brainly.com/question/19993924
#SPJ2
According to markovnikov's rule of the electrophilic addition to an alkene, the electrophile, usually a proton, is more likely to add to the?
According to markovnikov's rule of the electrophilic addition to an alkene, the electrophile, usually a proton, is more likely to add to the less-substituted carbon in a double bond.
With additional substituents present in this configuration, the intermediate carbocation is stabilised by being located on the more-substituted carbon.
The nucleophile will then end up in a double bond on the more-substituted carbon in a reaction that follows Markovnikov's rule.The outcome of some addition reactions is described by Markovnikov's rule or Markownikoff's rule in organic chemistry. Vladimir Markovnikov, a Russian scientist, created the rule in 1870.
To learn more about Markovnikov's rule
https://brainly.com/question/14529644
#SPJ4
.What is the mass percentage of cobalt in cobalt(II) fluoride, CoF2?
Find the mass of cobalt is 12 and the mass of fluoride which is 19 and then add them which will be 50.
Since you're looking for Cobalt only, it will be 12 times 100% divided by 50 which will then give the percentage of 24%.
*why divide by 50, because it is the mass of the whole chemical.
The mass percentage of cobalt in Cobalt(II) fluoride is 60.8%
From the question,
We are to determine the mass percentage of Cobalt (Co) in Cobalt(II) fluoride (CoF₂)
The mass percentage of Cobalt in the Cobalt(II) fluoride can be determined using the formula
\(Mass\ percentage\ of\ Co= \frac{Atomic\ mass\ of\ Co}{Molar\ mass\ of\ CoF_{2} } \times 100\%\)
Atomic mass of Co = 58.93 g/mol
Molar mass of CoF₂ = 96.93 g/mol
∴ Mass percentage of Co = \(\frac{58.93}{96.93}\times 100\%\)
Mass percentage of Co = \(\frac{5893}{96.93}\%\)
Mass percentage of Co = 60.79645%
Mass percentage of Co ≅ 60.8%
Hence, the mass percentage of cobalt in Cobalt(II) fluoride is 60.8%
Learn more here: https://brainly.com/question/2789100
A car starts from rest and reaches a top speed of 80 m/s. If the car did this is 20 seconds . What is the acceleration ?
somethingExplanation:
yanjun m, dazhen t, hao x, yingjie q, yong l, zhang w. division of coalbed methane desorption stages and its significance. petroleum exploration and development
The article "Division of Coalbed Methane Desorption Stages and Its Significance" published in the journal Petroleum Exploration and Development discusses the different stages of desorption of coalbed methane (CBM) and their significance. The authors, Yanjun M, Dazhen T, Hao X, Yingjie Q, Yong L, and Zhang W, analyze the release of methane gas from coal seams during the extraction process.
CBM desorption occurs in several stages: adsorption desorption, diffusion desorption, and molecular desorption. These stages represent the various mechanisms through which methane is liberated from coal. Each stage has its own characteristics and plays a significant role in the overall desorption process.
Understanding the division of CBM desorption stages is crucial for optimizing CBM extraction and production. It helps in predicting the desorption rate, estimating the amount of recoverable methane, and designing efficient production strategies.
In summary, the article by Yanjun M and colleagues provides valuable insights into the different stages of CBM desorption and their importance in the field of petroleum exploration and development.
To know more about Coalbed Methane visit:-
https://brainly.com/question/12645635
#SPJ11
Samples of the same element are different ions because the number of what varies?
neutrons
protons
electrons
Answer: Electrons
Explanation:
Erica is working in the lab. She wants to remove the fine dust particles suspended in a sample of oil. Which method is most likely to yes? A reverse osmosis b osmosis c filtration d dilution
Answer: reverse osmosis.
Explanation:
you are welocome please choose me for brainlist
A student has measured the volume of a sample of hydrogen gas and has found that she has a total of 5.02 moles of the gas. What is the mass of this sample of hydrogen gas? Please round your answer to two digits after the decimal point, and remember to include correct, complete units (including substance formula).
0.00355moles is the mass of this sample of hydrogen gas when A student has measured the volume of a sample of hydrogen gas and has found that she has a total of 5.02 moles of the gas.
What is hydrogen gas?The chemical element hydrogen is represented by the letter symbol H and atomic number 1. The lightest element of all is is hydrogen.
Fuel cells may produce energy, power, and heat using hydrogen. The two industries where hydrogen is currently most widely employed are fertilizer manufacturing and petroleum refining, with the developing markets of utilities and transportation.
Given:
volume of gas 5.02 moles
temp=293.15 K
Pressure= 0.025
Now putting the values accordingly
5.02 x 0.025 / 293.15 x 8.314472 =0.00355moles
to know more about hydrogen gas visit
https://brainly.com/question/13058224
#SPJ1
the water in a beaker has a volume of 50 millimeters, is this an extensive property?
No, the volume of water in a beaker is not an extensive property.
Extensive properties are those that depend on the amount or size of the substance being measured. In other words, they are properties that change with the quantity of the substance. Examples of extensive properties include mass, volume, and total energy.
In the given scenario, the volume of water in the beaker is 50 milliliters. This volume remains the same regardless of the quantity of water present. Whether it's 50 milliliters or 500 milliliters, the volume measurement does not change. Therefore, the volume of water in the beaker is an example of an intensive property.
Intensive properties are independent of the amount or size of the substance. They are characteristics that remain constant regardless of the quantity of the substance. Examples of intensive properties include temperature, density, and color.
It's important to note that the distinction between extensive and intensive properties depends on the specific property being considered. While volume is typically an extensive property for a bulk substance, in the case of a fixed volume of water in a beaker, it becomes an intensive property.
In summary, the volume of water in a beaker is not an extensive property but rather an intensive property because it does not change with the quantity of the substance.
For more such questions on extensive property visit:
https://brainly.com/question/13055036
#SPJ8
Use the following chemical equation to answer the following problems:
2 C4H6+11 02-> 8 CO2 + 6 H20
If 20 moles of fuel are combusted in the above equation, how many moles
of 02 are consumed?
What is the limiting reactant for this equation based on the previous
question?
110 moles of O2 are consumed when 20 moles of C4H6 are combusted ; Based on the amount of O2 available, it is the limiting reactant in this equation.
What is meant by combustion reaction?A reaction in which substance reacts with the oxygen gas and producing energy in the form of light and heat is called as combustion reaction.
2 C4H6 + 11 O2 -> 8 CO2 + 6 H2O
(11 moles O2 / 2 moles C4H6) x 20 moles C4H6 = 110 moles O2
Therefore, 110 moles of O2 are consumed when 20 moles of C4H6 are combusted.
From the previous calculation, we know that 110 moles of O2 are consumed when 20 moles of C4H6 are combusted. This means that we need 20/2 = 10 moles of O2 to react with the available 20 moles of C4H6.
However, if we only have 8 moles of O2 available, then O2 will be the limiting reactant, as there is not enough O2 to react with all of the C4H6.
Therefore, based on the amount of O2 available, it is the limiting reactant in this equation.
To know more about combustion reaction, refer
https://brainly.com/question/13251946
#SPJ1
How does knowing the
Solubility of substances help
us in daily life?
Answer:
making drinks, purifying water
Explanation:
25 grams of Na to atoms
Answer:
1.09 moles
Explanation:
Sodium has a molar mass of 23 grams per mole. To get the number of moles of sodium, divide 25 grams by 23 grams per mole. The answer is 1.09 moles
Every elements atoms are the same.
True
False
Answer:
Two atoms of the same chemical element are typically not identical. ... Two atoms of the same element can be different if their electrons are in different states. If one copper atom has an electron in an excited state and another copper atom has all of its electrons in the ground state, then the two atoms are different.
Explanation:
write a balanced chemical equation for the standard formation reaction of liquid acetic acid
An example of balanced chemical equation of liquid acetic acid is CH3COOH (l) ⟶ CH3COOH (l)
What is a balanced chemical equation for liquid acetic acid?The balanced chemical equation for the standard formation reaction of liquid acetic acid, CH3COOH, is simply:
CH3COOH (l) ⟶ CH3COOH (l)Since acetic acid is already in its liquid form, there is no need for any reactants or additional elements to balance the equation. The equation represents the formation of liquid acetic acid from its individual components without any other chemical changes or reactions involved.
Learn more about chemical equation in: https://brainly.com/question/28792948
#SPJ4
_K2CO3 —> _K2O + CO2 , balance it
Explanation:
K2CO3 ➖ K2O + CO2
it is itself balanced.
Answer:
1K2CO3 —> 1K2O + CO2
Explanation:
The equation is already balanced. We can check by counting the amount of each element on each side of the equation:
_K2CO3 —> _K2O + CO2
Products Side:
• K: 2
• C: 1
• O: 3
Reactants Side:
• K: 2
• C: 1
• O: 3
Since everything matches, we can just put a coefficient of 1 in front of each potassium.
1K2CO3 —> 1K2O + CO2
4. If 13.34 g of an unknown substance has a -40.8 J of heat in cooling from 50°C to 43°C,
what is the specific heat of the unknown?
Answer: c (specific heat capacity) = 0.4369243949 J/g *C
Or with Significant digits: 0.44 ( 2 sig digs because of temperature)
Explanation: So this is a simple calorimetry question, so you have to consider this formula, ΔH = -Q and since Q = mcΔt || Therefore you get this equation ΔH = - (mcΔt). So you want to solve for c, now rearrange. Once you do that, you will end up with c = - (ΔH/ -m · -Δt)
Now Plug in the numbers
Then you will get 0.44!
Hope that helped and remember significant digits! Good luck!
Which of the following describes what a scientist does?
Answer:
people who discover new things fyi you dont have any answer choices on there
Explanation:
there are different type of scientist
Answer:
A scientist asks questions about the world.
Explanation:
1 Mg (s) + 2 HCl (aq) --> 1 MgCl2 + 1 H2 If 2.50 mol of hydrochloric acid is reacted, how many moles of magnesium chloride is produced?
Answer:
1.25 moles of magnesium chloride are produced
Explanation:
Based on the reaction:
Mg(s) + 2HCl (aq) → MgCl₂(s) + H₂(g)
1 mole of magnesium, Mg, reacts with 2 moles of hydrochloric acid, HCl, to produce 1 mole of magnesium chloride, MgCl₂ and 1 mole of hydrogen gas.
To solve this question we have to tak, from the chemical equation:
2 mol HCl = 1mol MgCl₂
That means, the moles of MgCl₂ produced from 2.50mol HCl are:
2.50 mol HCl * (1mol MgCl₂ / 2mol HCl) =
1.25 moles of magnesium chloride are producedIn the chemical compound FePO4, what is the percent composition of iron? Type your answer in the space below, rounded to the nearest whole number.
The percent composition of iron in the chemical compound FePO4 is 23%. Molar mass of O = 16 g/mol(4 atoms of O)Total = 56 + (31 × 1) + (16 × 4) = 150 g/molThe molar mass of iron (Fe) is 56 g/mol.
To calculate the percent composition of iron in the chemical compound FePO4, we need to find the molar mass of the whole compound and that of iron and then divide the two. The molar mass of FePO4 is:Molar mass of Fe = 56 g/molMolar mass of P = 31 g/molMolar mass of O = 16 g/mol(4 atoms of O)Total = 56 + (31 × 1) + (16 × 4) = 150 g/molThe molar mass of iron (Fe) is 56 g/mol.
Percent composition of iron in FePO4 = (Molar mass of Fe / Molar mass of FePO4) × 100= (56/150) × 100= 37.33%≈ 23% (rounded to the nearest whole number)Therefore, the percent composition of iron in the chemical compound FePO4 is 23%.
To know more about chemical visit:
https://brainly.com/question/29240183
#SPJ11
Why is it preferable to use Am in smoke detector?
Low stable and highly reactive
High stability over long time and source need not be replaced
High penetration and high ionization
A good source of beta radiation and has a half-life of 432 years
Answer:
Ionization smoke detectors use americium as a source of alpha particles. Alpha particles from the americium source ionize air molecules. This makes some particles positively charged and some negatively charged. ... Because of this shielding, the smoke detector poses no radiation health risk when they are properly handled.
Explanation:
Hope this helped! :D
16. the electron configuration of nitrogen is how many more electrons does nitrogen need to satisfy the octet rule?
3 On the periodic table, column 5 contains nitrogen, denoted by the letter N.Its valence electron count is 5.To obtain an octet, three linkages must be created.The straightforward formula is 5 + 3 = 8.
The octet law applies to nitrogen, right?The second row of the p-block area includes fluorine, oxygen, nitrogen, and carbon.When they combine, these elements closely adhere to the octet rule.In order to complete their octet, for instance, these elements combine with hydrogen to make two to four bonds.
For nitrogen to have a complete valence, how many additional electrons are required?Two nitrogen atoms would have a total of 10 valence electrons if the entire number of valence electrons in nitrogen, which is five, were to be doubled.A triple bond is necessary for the octet since it needs 8 total electrons for an atom to have a full valence shell.
To know more about electron configuration of nitrogen visit:
https://brainly.com/question/1454818
#SPJ4
A student wants to make a fair comparison of the reactivity of the metals with hydrochloric acid.
Name two variables that must be kept constant.
Answer:
the concentration of the reactants
the temperature in heating
The variable that should be kept constant is the concentration of the reactant and the temperature in heating.
What is hydrochloric acid?Hydrochloric acid (HCl) is called as the muriatic acid represent the colorless corrosive, also the mineral acid should be strong that contains various industrial used also it should be reacted with an organic base it created the hydrochloride salt.
Therefore, we can conclude that The variable that should be kept constant is the concentration of the reactant and the temperature in heating.
Learn more about acid here: https://brainly.com/question/17784856
What will be the new volume of a balloon if it has a volume of 350 mL at 19 C and 1 atm, and rises in the air to a temp of 17 C and 0.8 atm?
The new volume of the balloon at 17°C and 0.8 atm is approximately 434.5 mL.
What is the final volume of the balloon?The combined gas law put together both Boyle's Law, Charles's Law, and Gay-Lussac's Law.
It is expressed as:
\(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\)
Given that:
Initial volume V₁ = 350 mLInitial pressure P₁ = 1.0 atmInitial temperature T₁ = 19°C = ( 19 + 273.15)K = Final pressure P₂ = 0.8 atmFinal temperature T₂ = 17°C = ( 17 + 273.15 ) = 290.15KFinal volume V₂ = ?Plug the given values into the combined gas law formula and solve for the final volume.
\(\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}\\\\P_1V_1T_2 = P_2V_2T_1\\\\V_2 = \frac{P_1V_1T_2}{P_2T_1} \\\\V_2 = \frac{1.0atm\ *\ 350mL\ * \ 290.15K}{0.8atm\ *\ 292.15K } \\\\V_2 = 434.5\ mL\)
Therefore, the final volume is approximately 434.5 mL.
Learn more about the combined gas law here: https://brainly.com/question/27403107
#SPJ1
What evolution was evident in Darwin's finches?
1. beak type
2. leg muscles
3. wing span
4. eyesight
Answer:
sorry I don't know the answer hope you understand
A saturated solution of BaSO4, at 25°C was found experimentally to have a concentration of 4.0 x 10^-5 mol dm^-3. What is the solubility product of this salt?
The solubility product (Ksp) of the salt given in question is 1.6x10^-9.
What is solubility product?
The equilibrium constant for a solid material dissolving in an aqueous solution is the solubility product constant, Ksp. It stands for the degree of solute dissolution in solution. A substance's Ksp value increases with how soluble it is.
Suppose we have reaction:
aA(s)↽⇀cC(aq)+dD(aq)
So, the formula to determine solubility product will be:
\(K_{sp} = [C]^c[D]^d\)
Let S mol/L be the solubility of salt. So,
\(S = [BaSo_4] = [Ba^{2+}] = [So_4^{2-}]\)
\(S = 4.0\times10^{-5}\)
we know that,
\(K_{sp} = [C]^c[D]^d = S\times S\)
\(K_sp = (4.0\times10^{-5}) \times (4.0\times10^{-5})\)
\(K_sp = 1.6 \times 10^{-9}\)
Hence, the solubility product is \(1.6 \times 10^{-9}\).
To know more about solubility product, go to link
https://brainly.com/question/9807304
#SPJ9
Which description of salt is a chemical property??????????????? ΩυΩ ΤΩΤ
Answer:
No combustion
Explanation:
Physical Properties Chemical Properties
White cubic crystals Do not undergo combustion
Odorless, salty taste Make ionic bonds easily
As solids they do not conduct electricity The product of mixing acids and bases
This is the lesson
What is the density of ammonia gas at 2.00atm pressure and a temperature of 30.0 degrees C?
a. 0.695 g/L
b. 17.0 g/L
c. 1.37 g/L
d. 0.720 g/L
The density of ammonia gas at 2.00 atm pressure and a temperature of 30.0 degrees C is 0.720 g/L. The correct option is (d).
The density of a gas can be calculated by using the ideal gas law, which is given as
PV = nRT
where
P is the pressure, V is the volume, n is the number of moles, R is the ideal gas constant, and T is the temperature.The ideal gas law can be rearranged to give the density of the gas as
ρ = (PM) / RT
where
M is the molar mass of the gas. T
he molar mass of ammonia is 17.03 g/mol. Using the given values,
ρ = (2.00 atm x 17.03 g/mol) / (0.08206 L.atm/mol.K x (30.0 + 273.15) K)
ρ = 0.720 g/L
Therefore, the density of ammonia gas at 2.00 atm pressure and a temperature of 30.0 degrees C is 0.720 g/L.
You can learn more about ammonia gas at
https://brainly.com/question/7982628
#SPJ11