Answers
Answer: True
Explanation:
Related Questions
A compound of P and F was analyzed as follows: heating 0.2324 g of the compound in a 378-cm3 container turned all of it to gas, which had a pressure of 97.3 mmHg at 77°C. Then the gas was mixed with calcium chloride solution, which turned all of the F to 0.2631 g of CaF2. Determine the molecular formula of the compound.
Answers
The molecular formula of the compound is determined as P₂F₄.
What is meant by molecular formula?Molecular formula tells us which atoms and how many of each type of atom are present in the molecule.
Molar mass of CaF₂ is 78.07 g/mol(0.2631 g CaF₂) × (1 mol CaF₂ / 78.07 g CaF₂) = 0.00337 mol CaF₂
2F- + Ca₂+ → CaF₂
(0.00337 mol CaF₂) × (2 mol F / 1 mol CaF₂) = 0.00674 mol F
As, Molar mass of F is 18.9984 g/mol
So, (0.00674 mol F) × (18.9984 g F / 1 mol F) = 0.12805 g F
1 mmHg = 0.00131578947 atm
(97.3 mmHg) × (0.00131578947 atm / 1 atm) = 0.128 atm
(378 cm³) × (1L / 1000 cm³) = 0.378 L
Now, T = 77 + 273 = 350 K
As, PV = nRT
n(PxFy) = PV / RT
n(PxFy) = (0.128 atm × 0.378 L) / (0.0821 L atm mol-1 K-1 × 350 K) = 0.001684 mol
n(PxFy) = 0.001684 mol
n(PxFy) = m(PxFy) / M(PxFy)
M(PxFy) = m(PxFy) / n(PxFy) = (0.2324 g) / (0.001684 mol) = 138 g/mol
m(PxFy) = m(P) + m(F)
0.2324 g = m(P) + 0.12805 g
m(P) = 0.2324 - 0.12805 = 0.10435
m(P) = 0.10435 g
Molar mass of P is 30.9737 g/mol
so, (0.10435 g P) × (1 mol P / 30.9737 g P) = 0.003369 mol P
Now, n(P) : n(F) = 0.003369 mol : 0.00674 mol = 1 : 2
Therefore, empirical formula of PxFy is PF₂
Molar mass of PF₂ 68.9705 g/mol
Molecular formula of PxFy is ( PF₂)n
n = M(PxFy) / M( PF₂) = (138) / (68.9705) = 2
Therefore, the molecular formula of PxFy is P₂F₄.
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Which of the following amino acids would be easiest to distinguish from the other three in a titration?
A. F - Phenylalanine.
B. K - Lysine.
C. V - Valine.
D. G - Glycine.
Answers
Answer:
B. K - Lysine.
Explanation:
Required
The easiest amino acid to distinguish
The 4 amino acids in the question can be grouped into 2. The groups are:
(1) Group I - Nonpolar amino acids and (2) Group IV - Basic amino acids
Three of the amino acids belong to group I while the last belongs to group IV.
The acids according to their categories are:
(1) Group I - Nonpolar amino acids:- Phenylalanine, Valine and Glycine
(2) Group IV - Basic amino acids:- Lysine
Because Lysine belongs to a different group different from the other three, it will be easily distinguished because it will exhibit a different property from the other three acids.
pls helpppppp now in the human body the digestion of proteins takes place primarily in which two organs?
Answers
What is the difference between the chemical formula of water and carbon dioxide?
Answers
The chemical formula of water is H2O, and the chemical formula of carbon dioxide is CO2. This means that water has 2 atoms of hydrogen and 1 atom of oxygen, which carbon dioxide has 1 atom of carbon and 2 atoms of oxygen. The only similar atom that the two molecules have in common is oxygen. CO2 has one more atom of oxygen than H2O. Hope this helps!
H2O is water. CO2 is CD.
_ZnS +2HCl → ___ZnCl₂ + ___H₂S|
Answers
The missing coefficients in the above balanced chemical equation are as follows: 1, 1, 1.
How to balance a chemical equation?A chemical equation is a symbolic representation of a chemical reaction where reactants are represented on the left, and products on the right.
A chemical equation is said to be balanced when the number of atoms of each element on both sides of the equation are the same.
According to this question, zinc sulphide reacts with hydrogen chloride to produce zinc chloride and hydrogen sulphide as follows:
_ZnS +2HCl → ___ZnCl₂ + ___H₂S
The balanced equation is as follows:
ZnS +2HCl → ZnCl₂ + H₂S
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The electrons involved in the formation of a chemical bond are called
A. valence electrons.
B. s electrons.
C. dipoles.
D. Lewis electrons.
Answers
Answer:
c
Explanation:
electrons
The electrons of an atom involved in the formation of a chemical bond are called valence electrons. Therefore, option (A) is correct.
What is a valence electron?Valence electrons can be defined as the electrons present in the outermost shell of an atom while the electrons occupied in the inner shell are called core electrons. Lewis structures can be helpful to determine the number of valence electrons and know the types of chemical bonds.
Valence electrons are distributed in different shells and these electrons are cause interaction between different atoms and responsible for the formation of chemical bonds between atoms to complete their octet.
Only electrons filled in the outermost shell can able participate in the formation of a chemical bond or a molecule and decide the reactivity of the element.
For example, the elements of group 1 have one electron in their valence shell. They have a great tendency to lose that electron to acquire the configuration of the nearest noble gas.
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The hydrolysis of adenosine triphosphate (ATP) is represented by the equation below. This reaction is critically important in cellular biology, but the reaction itself proceeds at a very slow rate. Based on the information given, which of the following best explains why an enzyme (biological catalyst) is required for the reaction to occur at a faster rate?
ATP+ H2O ADP+ Pi
ΔG= -30.5Kj/mol
a. Because ΔG < 0, the hydrolysis of ATP is not thermodynamically favorable. In cells, ΔS is increased by increasing the amount of H2O consumed, resulting in ΔG >0 and an increase in the reaction rate.
b. Because ΔG < 0, the hydrolysis of ATP is not thermodynamically favorable. In cells, enzymes act as catalysts that decrease ΔH for the reaction, resulting in ΔG >0 and an increase in the reaction rate.
c. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a small activation energy.
d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy.
Answers
Answer:
d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy.
Explanation:
Hello!
In this case, since negative Gibbs free energies of reaction stand for thermodynamically favored processes, we can immediately rule out choices a. and b.
Moreover, since the reaction is slow without the presence of a catalyst, which the context of biochemistry is an enzyme, we infer that correct choice is d. Although the hydrolysis of ATP is thermodynamically favorable, without a catalyst the reaction occurs at a very slow rate because it has a large activation energy because the higher the activation energy the slower the reaction according to the Arrhenius equation.
Best regards!
How many gold atoms are present in 4.0 x 10-10 mol of gold?
Answers
Answer:
2.408 x 10^14
Explanation:
When 7.524 is rounded to 3 sig figs it will be
Answers
When 7.524 is rounded to 3 significant figures, it will be 7.52.
The process of changing a number to a nearby number with fewer significant digits is known as rounding.
Rounding can be done to the nearest integer, the nearest tenth, the nearest hundredth, and so on.
Here are some pointers on rounding numbers to a certain number of significant digits:If the digit following the last significant digit is less than 5, simply drop it and all following digits.
(round down)For example, 2.832 rounded to two significant digits is 2.8 since the 3 is followed by a 2 which is less than 5.
If the digit following the last significant digit is greater than 5, add 1 to the last significant digit, then drop all of the digits that follow it.
(round up)For example, 4.673 rounded to two significant digits is 4.7 since the 3 is followed by a 7 which is greater than 5.
If the digit following the last significant digit is exactly 5, the preceding digit is odd, and no other digits follow, increase the last significant digit by 1.
If the digit following the last significant digit is exactly 5, the preceding digit is even, and no other digits follow, simply leave the last significant digit alone.
For example, 2.875 rounded to two significant digits is 2.9 since the 5 is followed by an odd number, which means that the 8 should be rounded up, while 2.765 rounded to two significant digits is 2.8 since the 5 is followed by an even number, which means that the 6 should be left alone.
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convert 21.8 in^3 to liters
Answers
Taking into account the change of units, 21.8 in³ is equal to 0.357238 L.
Definition of rule of threeThe rule of three is a way of solving problems of proportionality between three known values and an unknown value, establishing a relationship of proportionality between all of them.
If the relationship between the magnitudes is direct, that is, when one magnitude increases, so does the other (or when one magnitude decreases, so does the other) , the direct rule of three must be applied using the following formula, where a, b and c known data and x the variable to be calculated:
a ⇒ b
c ⇒ x
So: x= (c×b)÷ a
The direct rule of three is the rule applied in this case where there is a change of units.
in³ to litersTo perform in this case the conversion of units, you must first know that 1 in³ = 0.0163871 L. So, the rule of three can be used as follow: if 1 in³ is 0.0163871 L, 21.8 in³ equals how many L?
1 in³ ⇒ 0.0163871 L
21.8 in³ ⇒ x
So: x= (21.8 in³ ×0.0163871 L)÷ 1 in³
Solving:
x= 0.357238 L
In summary, 21.8 in³ is equal to 0.357238 L.
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Given that the Ksp value for Ca3(PO4)2 is 8.6×10−19, if the concentration of Ca2+ in solution is 4.9×10−5 M, the concentration of PO3−4 must exceed _____ to generate a precipitate.
Answers
Answer:
.0027 M
Explanation:
We must calculate the threshold concentration of PO3−4 using Ksp and the given concentration of Ca2+:
Ca3(PO4)2(s)⇌3Ca2+(aq)+2PO3−4(aq)
Ksp=8.6×10−19=[Ca2+]3[PO3−4]2=(4.9×10−5M)3[PO3−4]2
[PO3−4]=0.0027 M
Round 5578 L to three significant figures.
a. 557 L
b. 558 L
c. 5.58 x 10(3) L
d. 5.58 x 10(-3) L
Answers
Answer:
b
Explanation:
The figures of a number that are noteworthy in high accuracy or precision are known as significant figures. They are as follows:
Any digit that isn't zeroAs in 20012 or 64.60007, there are zeros between non-zero numbers.Only use leading zeros when a decimal point is present, such as in 5640.0 or 532.330.If the figure is less than 5, remove it and leave the rest of the number unaffected but if more than 5 add, round it up to 1, and add it to the next figure in the line.From the given information:
To (3) sig. fig: 5578 L = 558 L
1) Consider the dissolution of CaCO3 compound in aqueous medium.
a) Write down the equation of the chemical reaction that represents this dissolution.
b) Write the expression of the equilibrium constant for this reaction.
c) Explain how the addition of a certain amount of sodium carbonate to
water would affect this balance
2) The equilibrium constant for the reaction 2 SO2(g) + O2(g) 2 SO3(g) has a Kc value = 2.5x10^10 to 500 K. Find the kc value for each of the following reactions at the same temperature
(a) SO2(g) +1/2 O2 SO3(g).
(b) SO3(g) SO2(g)+1/2 O2(g)
(c) 3SO3(g)+ 3/2 O2(g) 3SO3(g)
3) A reaction mixture consisting of 0.400 mol H 2 and 1.60 mol I 2 was prepared in a 3.00 L flask and heated. In balance, 60.0% of the hydrogen gas reacted. What is the equilibrium constant for the reaction H 2(g) + I 2(g) 2 HI(g) at this temperature?
Answers
Explanation:
1a) CaCO₃(s) → Ca²⁺(aq) + CO₃²⁻(aq)
1b) Remember, solids are not included in the equilibrium equation.
K = [Ca²⁺] [CO₃²⁻]
1c) Adding CO₃²⁻ ions will shift the reaction to the left, producing CaCO₃(s) until equilibrium is restored.
2) 2 SO₂(g) + O₂(g) → 2 SO₃(g)
Kc = 2.5×10¹⁰ = [SO₃]² / ([SO₂]² [O₂])
2a) SO₂(g) + ½ O₂(g) → SO₃(g)
Kc = [SO₃] / ([SO₂] [O₂]^½)
Kc² = [SO₃]² / ([SO₂]² [O₂])
Kc² = 2.5×10¹⁰
Kc ≈ 1.58×10⁵
2b) SO₃(g) → SO₂(g) + ½ O₂(g)
Kc = [SO₂] [O₂]^½ / [SO₃]
Kc = 1 / (1.58×10⁵)
Kc ≈ 6.33×10⁻⁶
2c) 3 SO₂(g) + ³/₂ O₂(g) → 3 SO₃(g)
Kc = [SO₃]³ / ([SO₂]³ [O₂]^³/₂)
Kc = ([SO₃] / ([SO₂] [O₂]^½))³
Kc = (1.58×10⁵)³
Kc ≈ 3.95×10¹⁵
3) H₂(g) + I₂(g) → 2 HI(g)
K = [HI]² / ([H₂] [I₂])
Make an ICE table.
\(\left[\begin{array}{cccc}&Initial&Change&Equilibrium\\H_{2}&0.400&-0.240&0.160\\I_{2}&1.60&-0.240&1.360\\HI&0&+0.480&0.480\end{array}\right]\)
K = (0.480)² / (0.160 × 1.360)
K = 1.06
17 points The Art Forger Who Tricked the Nazis
Where did the trial take place? What was the defendant accused of?
What was strange about his defense?
How did Han van Meegeren manage to forge the works of art so well? What did he do to make them look authentic?
How could forensic testing have changed this case?
What ultimately happened to van Meegeren?
Money to Run, But No Skills to Hide
How did Schrenker try to fake his own death? How did he get caught?
Why is creating a new state ID harder to do these days?
Why is it so difficult to fake a passport? What is the easiest way for criminals to obtain a passport?
Why does Mr. Abagnale claim it is easy to get a fraudulent passport? What steps does someone have to take to make this happen?
Why was Mr. Abagnale arrested? What happened to him after his arrest?
Answers
Answer:
but I have a great day to be a good day for a new post it on your own life to be the
A 75 Kg skateboarder is riding downhill, exerting 25 N. What is their acceleration?
Answers
Answer:
The answer is 0.33 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
\(a = \frac{f}{m} \\ \)
where
m is the mass
f is the force
a is the acceleration
From the question
f = 25 N
m = 75 kg
We have
\(a = \frac{25}{75} = \frac{1}{3} \\ = 0.333333333...\)
We have the final answer as
0.33 m/s²Hope this helps you
‼️‼️‼️need help asap‼️‼️‼️
Answers
24. To calculate the molarity of a solution, we must first find out how many moles of \(BaI_2\) are in the solution.
Molar mass of BaI2 = (1 x atomic mass of Ba) + (2 x atomic mass of I)
= (1 x 137.33 g/mol) + (2 x 126.90 g/mol)
= 137.33 g/mol + 253.80 g/mol
= 391.13 g/mol
Number of moles of BaI2 = mass of BaI2 / molar mass of BaI2
= 413 g / 391.13 g/mol
= 1.056 mol
the molarity of the solution using the formula:
Molarity (M) = moles of solute / volume of solution (in liters)
Volume of solution = 750 ml = 750 ml / 1000 ml/L = 0.750 L
Molarity = 1.056 mol / 0.750 L
= 1.408 M
Therefore, the molarity of the solution is 1.408 M.
25. a. \(P_20_7\) - Ionic compound (Phosphorus(V) oxide)
b. \(SnBr_2\) - Ionic compound (Tin(II) bromide)
c. \(Fe(OH)_2\)- Ionic compound (Iron(II) hydroxide)
d. \(Cl_30_8\) - Not a valid chemical formula
26.
A. (NH4)2CO3 is soluble in water (NH4) in an ionic substance called 2CO3 containing the ions carbonate and ammonium.
B. Fe(OH)2 is insoluble in water. Iron(II) hydroxide is only sparingly soluble.
C. CaOH is not soluble in water. Only very little calcium hydroxide is soluble.
D. PbCl2 is insoluble in water. The chloride of lead(II) is sparingly soluble.
27. FeS + 2KCl = FeCl2 + K2S
FeS is an insoluble precipitate.
2KCl dissolves in aqueous solution.
ZnCl2 + SrSO4 = ZnSO4 + SrCl2
SrSO4 is an insoluble precipitate.
ZnCl2 dissolves in aqueous solution.
28. In salt water, the solute is the salt (sodium chloride, or NaCl), and the solvent is water. The element which dissolves in the solvent to form a solution is called solute.
29. Charles's law states that, if the pressure and volume of a gas remain constant, the volume of a gas falls as the temperature increases. As a result, the capacity of the balloon will decrease as it ascends to altitudes where the temperature is -15 °C.
30. The average kinetic energy of the particles of a substance increases with increase in its temperature. This is because temperature is a gauge for the specific kinetic energy of the constituent particles of a substance. On the other hand, the average kinetic energy falls as the temperature increases.
31. When the volume of a gas decreases, its pressure increases. Boyle's law, which states that at a given temperature, the pressure of a gas is inversely proportional to its volume, describes this relationship. On the other hand, pressure falls when volume increases.
32. The pressure of a gas increases along with its temperature. Gay–Lussac's law, which states that the pressure of a gas is directly proportional to its temperature, given the volume and volume of the gas is constant, describes this relationship.
33. The volume of a syringe is reduced as a marshmallow is pressed and the plunger is depressed. As a result the pressure inside the syringe increases. This is because Boyle's law states that the volume and pressure of a gas are inversely proportional. The decrease in volume causes the air inside the syringe to contract, exerting more pressure on the marshmallow, which is then crushed.
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A gas storage cylinder in an ordinary chemical laboratory measures 4.6 cm wide and 18. cm high.This is the label on it.Contents: N₂ gasPressure: 28.2 atmIf the cylinder is opened and the gas allowed to escape into a large empty plastic bag, what will be the final volume ofnitrogen gas, including what's collected in the plastic bag and what's left over in the cylinder? Write your answer in liters.Round your answer to 2 significant digits.X5 ?EFindAr100
Answers
Answer:
\(8.5\text{ L}\)Explanation:
According to Boyles' law, the volume of a given mass of gas is inversely proportional to its pressure
Mathematically:
\(\begin{gathered} P_1V_1\text{ = P}_2V_2 \\ V_2\text{ = }\frac{P_1V_1}{P_2} \end{gathered}\)Where:
P1 is the initial pressure which is 28.2 atm
V1 is the volume of the cylinder which is:
\(\begin{gathered} V_1\text{ = }\pi\times r^2\times h \\ r\text{ = radius = }\frac{4.6}{2}\text{ = 2.3 cm} \\ h\text{ = 18 cm} \\ \\ V_1\text{ = }\pi\times2.3^2\times18\text{ = 299.14 cm}^3 \end{gathered}\)We convert V1 to liters by multiplying by 0.001 L
That would be:
\(299.14\text{ }\times\text{ 0.001 = 0.3 L}\)P2 is the atmospheric pressure which is 1 atm
Substituting the values, we have:
\(V_2\text{ = }\frac{28.2\text{ }\times0.3}{1}\text{ = 8.46 L}\)Give the formula of Plaster of Paris And some of its uses..
:))
Answers
Read each situation carefully. Write how energy transformation occurs in each situation. Write your answer on a separate sheet of paper.
1. Gerald just finish his work out at the gym. He ran at the park for 30 minutes and got very sweaty. What energy transformation took place while he was running?
2. Joshua was very hungry when he got home from the school. He decided to make some popcorn in the microwave. What energy transformation allowed Joshua's popcorn to pop?
3. Jeremy shaves every week using a battery powered shaver. What energy transformation shows how the shaver works?
4. Rica studies her lesson before going to bed at night. She makes use of a lampshade in studying her lessons. What energy transformation occurs when she plugged in the lamp shade and turned it on?
5. Dennis used to watch his favorite cartoon character every saturday using the smart television. What energy transformation occurs on the television?
\(tysm \: in \: advance\)
Answers
Answer:
1. Mechanical energy
2. Thermal energy
3. electric energy to mechanical energy
4. electrical energy to light
5. electric energy into sound energy and radiant energy
Explanation:
A sample of a certain lead compound contains 12.92 g of lead for 2 g of oxygen. A second sample has mass of 34.27 g and contains 14.39 g of oxygen. Are the two compound the same
Answers
The two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.
What is a chemical compound?A chemical compound is a substance made of numerous similar molecules (or molecular entities) joined by chemical bonds and comprising atoms from various chemical elements. Therefore, a molecule made up of only one type of atom is not a compound. Chemical reactions, which may entail interactions with other molecules, can change a compound into a distinct substance. Atomic bonds may be broken or new ones created during this process.
What are the calculations?sample 1 = mass of lead / mass of oxygen = 12.92g/2g = 6.46 .
sample 2 = mass of lead/ mass of oxygen = 34.27 - 14.39/14.39 = 1.38 .
so, the ratios are not the same.
Hence, the two chemical compounds are not the same, because their ratio is not equal. In both samples the composition of lead and oxygen is different.
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The phenolic indicator (ln-OH) has approximately the same pKa as a carboxylic acid. Which H is the most acidic proton in ln-OH? Circle or otherwise indicate the most acidic proton. Explain why that H is the most acidic proton in ln-OH (i.e. what makes its conjugate base well stabilized)?
Answers
The most acidic hydrogen atom is the hydrogen atom that have been bonded to the oxygen atom.
What is an acidic proton?
We say that a proton is an acidic proton if the proton is able to leave very easily from the rest of the compound. We know that there are several factors that could make a proton that is found in a molecule to become a labile or an acidic proton. The acidity of a proton largely stem from the fact that electron density between the hydrogen atom and the atom to which it is bonded is weak. As such, the bond is weakened by the lengthening of the bond and a consequent lability of the attached hydrogen atom as discussed here.
In the compounds as shown, the most acidic proton is the proton that is attached to the oxygen atom. This is because, the extensive conjugation in the molecule withdraws electrons from the 0-H bond and this makes the hydrogen atom to become labile or acidic.
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Enter the chemical equation 2H+(aq)+S2−(aq)→H2S(g)
.
Express your answer as a chemical equation.
Answers
The chemical equation for the reaction 2H⁺(aq) + S₂⁻(aq) → H₂S(g) can be represented as 2H⁺(aq) + S₂⁻(aq) → H₂S(g).
What is a chemical equation?A chemical equation uses symbols and formulas to express a chemical reaction. It displays the products on the right side of the arrow and the reactants on the left.
For example, in the chemical equation
2H₂(g) + O₂(g) → 2H₂O(l),
represents the reaction between hydrogen gas (H2) and oxygen gas (O₂) to produce liquid water (H₂O). The coefficient "2" in front of H₂ and H₂O indicates that two molecules of hydrogen gas and two molecules of water are involved in the reaction.
The equation is balanced using coefficients to make sure that each element has the same amount of atoms on both sides. The substances involved in the reaction and their stoichiometric relationship are described by chemical equations.
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How many atoms are in 12 g of Carbon-12 (12C)?
Answers
There are approximately 6.022 × 10^23 atoms in 12 grams of Carbon-12 (12C).
The number of atoms in a given amount of a substance can be calculated using Avogadro's number, which represents the number of atoms or molecules in one mole of a substance. Avogadro's number is approximately 6.022 × 10^23.
Carbon-12 is a specific isotope of carbon, with an atomic mass of 12 atomic mass units (amu). One mole of Carbon-12 has a mass of 12 grams. Since one mole of any substance contains Avogadro's number of particles, in the case of Carbon-12, it contains 6.022 × 10^23 atoms.
Therefore, if we have 12 grams of Carbon-12, which is equal to one mole, we can conclude that there are approximately 6.022 × 10^23 atoms in this amount of Carbon-12.
In summary, 12 grams of Carbon-12 contains approximately 6.022 × 10^23 atoms. Avogadro's number allows us to relate the mass of a substance to the number of atoms or molecules it contains, providing a fundamental concept in chemistry and enabling us to quantify and understand the microscopic world of atoms and molecules.
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100 POINTS HELP WILL GIVE BRAINLIEST
Answers
b. testing the hypothesis
What is the oxidation state of N in NaNOz?
Answers
The oxidation state of nitrogen (N) in NaNO3 is +5. option B
To determine the oxidation state of nitrogen (N) in sodium nitrate (NaNO3), we need to assign oxidation numbers to each element in the compound.
In NaNO3, we know that the sodium ion (Na+) has a +1 oxidation state because it is an alkali metal. Oxygen (O) typically has an oxidation state of -2 in compounds, and there are three oxygen atoms in NaNO3. Since the compound is neutral, the sum of the oxidation states must be zero.
Let's assume that the oxidation state of nitrogen is x. Therefore, we can set up the equation:
(+1) + x + (-2) * 3 = 0
Simplifying the equation:
+1 + x - 6 = 0
x - 5 = 0
x = +5
Therefore, the oxidation state of nitrogen (N) in NaNO3 is +5.
The oxidation state of an element indicates the number of electrons it has gained or lost in a compound. In this case, the nitrogen atom in NaNO3 has gained five electrons to achieve a stable oxidation state of +5.
It is important to note that oxidation states are formal charges and do not necessarily represent the actual distribution of electrons in a compound. They are assigned based on a set of rules and can be useful in understanding the reactivity and behavior of elements in chemical reactions.
Option B
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Where do nutrients(food and water) enter the body first?
O mouth
stomach
O esophagus
O rectum
Answers
Answer:
esophagus……………..
You first put food into your mouth
What are some potential real-world applications for renewable energy sources such as solar power and wind power?
Answers
The some of the potential in the real world applications for the renewable energy sources such as the solar power and the wind power are electricity generation, the water heating and cooling, and the transportation.
Renewable energy defined as the energy produced from the sources like the sun and the wind energy which are the naturally replenished and which do not run out.
The Renewable energy which can be used for the electricity generation, and the water heating and the cooling, and the transportation. The most sustainable sources of the energy are the renewable bioenergy. The Renewable sources of the, like the wind and the solar, it will emit the little to no the greenhouse gases.
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You have 0.672 L of 4.78 M aqueous AlCl3 solution in a glass. If you gently heat the solution until only 0.380 L is left, what is the new molarity of the AlCl3 solution?
Answers
Answer:
8.45 M
Explanation:
To solve this problem we need to keep in mind the definition of molarity:
Molarity = moles / volumeFirst we calculate the moles of AlCl₃ in 0.672 L of a 4.78 M solution:
Moles = Molarity * volumeMoles = 4.78 M * 0.672 L Moles = 3.212 molesThen we calculate the new molarity of the AlCl₃ solution using that number of moles, which remains the same throughout the evaporation process:
New Molarity = 3.212 moles / 0.380 LNew Molarity = 8.45 MThe following two organic compounds are structural isomers to each other. Carefully identify and justify the structural isomers type (skeletal, functional, or positional) with their common molecular formula
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Structural isomers are molecules with the same molecular formula but with different structural formulae. This means that they have the same number and types of atoms, but they are arranged differently. The following two organic compounds are structural isomers of each other.
Carefully identify and justify the structural isomers type (skeletal, functional, or positional) with their common molecular formula.Common molecular formula: C6H14Structural isomers:(i) Hexane: Hexane is a straight-chain alkane with six carbon atoms and no double bonds or rings. The carbon atoms are linked together in a linear or straight-chain configuration in the skeletal isomer. The skeletal isomer differs in terms of the arrangement of atoms in its molecule. This indicates that it is a skeletal isomer.(ii) 2-methylpentane: It is a branched-chain alkane with six carbon atoms and no double bonds or rings. It differs from the first molecule in terms of the location of a methyl group on the second carbon of the five-carbon chain, rather than a straight six-carbon chain. This difference is due to a change in the positioning of the carbon atoms in the molecule. As a result, it is a positional isomer, as it differs by the position of the functional group or substituent. Therefore, the skeletal and positional isomerism types are present between these two compounds.For such more question on molecular
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How many ions are formed during the dissociation of 500 molecules of carbonic acid, if it dissociates in the first degree by 20%, and in the second degree by 1%? Explain your answer.
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The dissociation of 500 molecules of carbonic acid would produce 200 + 15 = 215 ions.
What is Dissociation?
Dissociation is a chemical process in which a compound breaks down into two or more simpler components, usually ions, when it is exposed to a suitable solvent or energy source such as heat or light. In other words, it is the separation of a molecule or compound into smaller particles such as atoms, ions, or radicals.
The dissociation of carbonic acid (H2CO3) in the first degree produces two ions (H+ and HCO3-) per molecule, while the dissociation in the second degree produces three ions (H+, CO32-, and HCO3-) per molecule.
If 500 molecules of carbonic acid dissociate in the first degree by 20%, then 20% of the molecules (0.2 x 500 = 100) will dissociate, producing 100 x 2 = 200 ions (H+ and HCO3-).
If 500 molecules of carbonic acid dissociate in the second degree by 1%, then 1% of the molecules (0.01 x 500 = 5) will dissociate, producing 5 x 3 = 15 ions (H+, CO32-, and HCO3-).
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