Answers
Answer:
Cr2H6O7S so this the answer hope its useful
Related Questions
A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. Calculate the pressure when the volume is 1.41 L and the temperature is 298 K.
Answers
A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.
What is Combined Gas Law ?This law combined the three gas laws that is (i) Charle's Law (ii) Gay-Lussac's Law and (iii) Boyle's law.
It is expressed as
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
where,
P₁ = first pressure
P₂ = second pressure
V₁ = first volume
V₂ = second volume
T₁ = first temperature
T₂ = second temperature
Now put the values in above expression we get
[tex]\frac{P_1V_1}{T_1} = \frac{P_2V_2}{T_2}[/tex]
[tex]\frac{1.02\ atm \times 2.30\ L}{281\ K} = \frac{P_2 \times 1.41\ L}{298\ K}[/tex]
[tex]P_{2} = \frac{1.02\ atm \times 2.30\ L \times 298\ K}{281\ K \times 1.41\ L}[/tex]
P₂ = 1.76 atm
Thus from the above conclusion we can say that A sample of an ideal gas has a volume of 2.30 L at 281 K and 1.02 atm. 1.76 atm is the pressure when the volume is 1.41 L and the temperature is 298 K.
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a. The dissociation constant of the weak acid HF is K₂ = [H][F]. If at equilibrium
Ka
[HF]
the concentrations of H* and F are each 2.6 x 10-3 M and the concentration of
HF is 0.010 M, what is K₂ for HF? (3 points)
Answers
Answer:
6.76*10^-4 , or 6.8*10^-4 if you consider sig figs
Explanation:
This is a bit of a confusing question, since it incorrectly states that the acid disassociation constant is simply [H+][F-].
Ka = [H+][F-]/[HF] , so plugging in the values, we get
[tex]K=\frac{[2.6*10^{-3}][2.6*10^{-3}]}{[0.01]}\\K=\frac{[2.6*10^{-3}]^2}{[0.01]}\\K=0.000676=6.76*10^{-4}[/tex]
If we were to use the equation in the question, Ka=[H+][F-], we would get the answer 6.76 * 10^-6 , which is not the Ka for HF
In forming a molecular compound, each atom should have ______ electrons around it unless there is some specific reasons why this cannot be achieved.
Answers
In forming a molecular compound, each atom should have valence electrons around it unless there is some specific reasons why this cannot be achieved.
What is Valence Electrons ?Valence electrons is a negatively charged particle present in the outermost shell of an atom.
Example: Oxygen has 6 valence electrons in its outermost shell, Water has 8 valence electrons.
Thus from the above conclusion we can say that In forming a molecular compound, each atom should have valence electrons around it unless there is some specific reasons why this cannot be achieved.
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a 3.140 molar solution of NaCl is prepared. how many grams of NaCl are present in a sample containing 3 kg of water
Answers
I need help with this ASAP pls
Answers
Answer:
2c 1s
Expination: it came by there are 2carbon and 1sulphur
Answer:
2c1s
Explanation:
2c1s make me brainlist
HELP ASAP
Below are descriptions of two different objects that begin at rest and then now forces acting on them as described below.
Object 1: A skateboard with unbalanced forces
Object 2: A bicycle with balanced forces
Which statement is true about the objects?
A:Both objects are moving.
B: Both objects are not moving.
C:Object 1 is moving, and Object 2 is not moving.
D:Object 1 is not moving, and Object 2 is moving.
Answers
Answer:
C: Object 1 is moving, and Object 2 is not moving
Explanation:
Object one has unbalanced forces, so it can cause it to start moving ,since one force is moving stronger than its opposing one, but since Object 2 has balanced forces both forces hold it in place.
3. as a substitution reaction occurs, the number of electrons shared between
carbon atoms
a) increases
b) decreases
c) remains the same
Answers
c) remains the same
In a substitution reaction, number of electrons remain the same.
What is a substitution reaction?
When one functional group in a chemical molecule is replaced by another functional group, the chemical reaction is known as a substitution reaction.
It is also known as single displacement reaction or single replacement reaction.
Example: Iodoethane and water are produced when hydrogen iodide and ethanol combine.
CH₃CH₂OH + HI → CH₃CH₂I + H₂O
In this reaction OH is substituted or replaced by I giving CH₃CH₂I.
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A teacher divides her class into groups and assigns each
group the task of measuring the mass of the same object
three times. The teacher already knows that the mass of
the object is 25 g.
Based on the results each group records, which group makes the most
precise measurements of the object?
O
A. Group C: 32.1 g, 35.0 g, 25.0 g
O
B. Group B: 25.5 g, 25.0 g, 24.8 g
O
C. Group A: 28.5g, 28.4 g, 28.5 g
O D. Group D: 20.0 g, 25.0 g, 30.09
Answers
Answer:
Group C
Explanation:
Precision is how close the values are to each other
At constant pressure, the ratio between the volume expansion of a mole of gas with a high Cp to that of a mole of gas with a low Cp for a given heat input will be
Answers
At constant pressure, the ratio between the volume expansion of a mole of gas with a high Cp to that of a mole of gas with a low Cp for a given heat input is Less than 1.
How are Cp and Cv related to one another?The molar heat capacity of a substance is expressed as Cp when the pressure is constant and as Cv when the volume is constant. These two parameters so describe the molar heat capacity at various pressures and temperatures.
Constant Volume and PressureThe first law of thermodynamics states that heat delivered to a system can either be converted into internal energy or used to generate work in the environment. An isochoric process is one in which the volume is constant, whereas an isobaric process is one in which a gas interacts with its surroundings at constant pressure.
Constant PressureAn isobaric process takes place at constant pressure. Since the pressure is constant and the work is denoted by PV, the force applied is constant.
If gas is to expand at an isobaric pressure at a certain pressure, heat must be introduced into the system at a specific rate. For instance, a movable piston in a cylinder keeps the pressure inside the cylinder constant at atmospheric pressure despite the fact that it is isolated from the atmosphere. In other words, a moveable barrier serves as a dynamic link between the system and a constant-pressure reservoir.
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How can the arrangement of furniture in a room influence an individual’s behavior?
a.
The arrangement of furniture in a public room can either encourage or discourage social interaction.
b.
The arrangement of furniture in a room can influence an individual’s attitude toward survival.
c.
An individual’s overall mental health can be severely negatively impacted by the arrangement of furniture in a room.
d.
An individual’s behavior cannot be influenced by the arrangement of furniture in a room.
Please select the best answer from the choices provided
Answers
The arrangement of furniture in a public room can either encourage or discourage social interaction. The correct option is A.
What is social interaction?It is the process of exchanging information with others, verbally or otherwise.
The arrangement of furniture in a room filled with people can go a long way to encourage or discourage social interactions.
If physical barriers are put in between two seats such that people can barely see each other, the message may be that very little to no social interaction is allowed.
Without any physical barriers between seats, the message may be that people are free to interact, all other things being equal.
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what is a neutral atom of nitrogen-14
Answers
Answer:
You know that nitrogen-14 has 7 protons in the nucleus because it is an isotope of nitrogen, which has an atomic number equal to 7 . Because nitrogen-14 is a neutral atom, the number of protons it has in its nucleus must be equal to the number of electrons that surround its nucleus.
The radius of a hydrogen atom is 5.29 x 10-11m. What is the electric force between the single proton and the single electron of a hydrogen atom
Answers
The radius of a hydrogen atom is 5.29 × 10⁻¹¹ m. The electric force between the single proton and the single electron of a hydrogen atom is 7.94 × 10⁻⁸ N.
What is Coulomb's law ?[tex]F = \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{q_1 q_2}{r^2}[/tex]
where,
F = Electric Force
k = Coulomb constant
r = distance of separation
Now,
[tex]F = \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{q_1 q_2}{r^2}[/tex]
[tex]= \frac{1}{4 \pi \epsilon_{0}} \cdot \frac{e^2}{r^2}[/tex]
[tex]= \frac{1}{4 \pi\ 8.85 \times 10^{-12}} \cdot (\frac{1.6 \times 10^{-19}}{5.29 \times 10^{-11}})^{2}[/tex]
= 7.94 × 10⁻⁸ N
Thus from the above conclusion we can say that The radius of a hydrogen atom is 5.29 × 10⁻¹¹ m. The electric force between the single proton and the single electron of a hydrogen atom is 7.94 × 10⁻⁸ N.
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Consider two gases, A and B, are in a container at room temperature. What effect will the following changes have on the rate of the reaction between these gases? The temperature is decreased at a constant volume.
Answers
Answer:
decrease in temperature , decreases the kinetic movements of the gase molecules as a result decreases the frequency of collisions between gas molecules A and B consequently decreases the rate of reactions of gases A and B8.Your protocol calls for working with a 1.5 x 10-4 M boric acid solution. To save shelf space, you decide to make up a 20X stock solution. What is the molarity of the stock solution you just made
Answers
The molarity of the stock solution is 7.5 * 10 ^- 6 M.
Molar attention is a measure of the awareness of a chemical species, especially of a solute in an answer, in terms of the quantity of substance consistent with the unit quantity of the answer. In chemistry, the maximum generally used unit for molarity is the range of moles according to liter, having the unit symbol mol/L or mol/dm³ in the SI unit.
Molarity (M) is the quantity of a substance in a positive volume of answer. Molarity is described because the moles of a solute in step with liters of an answer. Molarity is also called the molar awareness of a solution.
Molarity is defined as the range of moles of solute consistent with the liter of answer. Molality is described because of the number of moles of solute per kilogram of solvent. Normality is described as the variety of equivalents in line with the liter of answers.
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What's the difference between a sigma bond and pi (π) bond?
Also, please state the three types of hybridization.
Answers
Answer:
Sigma bonds are formed by the Head-to-head overlapping of atomic orbitals while Pi bonds are formed by the lateral overlapping of two atomic orbitals.Types of hybridization:1) sp hybridization.2) sp² hybridization.3) Sp^3 hybridization.Hope this helps.Good luck ✅.A gas at 300 k and 4.0 atm is moved to a new location with a temperature of 250 k. the volume changes from 5.5 l to 2.0 l. what is the pressure of the gas at the new location? use the formula: p1v1 t1 = p2v2 t2
Answers
Answer:
9.17 atm
Explanation:
To find the new pressure of the gas, you need to use the following manipulated formula:
P₁V₁ / T₁ = P₂V₂ / T₂
In this formula,
P₁ = initial pressure (atm) P₂ = new pressure (atm)
V₁ = initial volume (L) V₂ = new volume (L)
T₁ = initial temperature (K) T₂ = new temperature (K)
Because you have been given values for all of the variables except for the new pressure, you can substitute them into the equation and simplify.
P₁ = 4.0 atm P₂ = ? atm
V₁ = 5.5 L V₂ = 2.0 L
T₁ = 300 K T₂ = 250 K
P₁V₁ / T₁ = P₂V₂ / T₂ <----- Given formula
(4.0 atm)(5.5 L) / (300 K) = P₂(2.0 L) / (250 K) <----- Insert variables
0.073333 = P₂(2.0 L) / (250 K) <----- Simplify left side
18.33333 = P₂(2.0 L) <----- Multiply both sides by 250
9.17 = P₂ <----- Divide both sides by 2.0
Answer:
=> 13.2 atm
Explanation:
From the question, we have question we have been provided with pressure, volume and temperature. Based on these variables, we are supposed to use the combined gas law formula (P1V1T1 = P2V2T2)
At location 1;
P1 = 4.0 atm
V1 = 5.5 L
T1 = 300 K.
At location 2;
P2 = ?
V2 = 2.0 L
T2 = 250 K.
We are required to determine the pressure (P2).
To begin, we make pressure (P2) the subject of in the formula:
P2 = (P1V1T1)/(V2T2) ................ eq. (i)
Then substitute the known values into the eq. (i).
P2 = (4.0 x 5.5 x 300)/(2.0 x 250) atm
= 13.2 atm.
Therefore, the pressure (P2) at location 2 is 13.2 atm.
Question 2 of 15
Which statement is true of both nuclear fusion and nuclear fission?
A. The nucleons in the resulting nuclei differ from the nucleons in the
original nuclei.
B. The products are nuclei of elements that are different from the
original elements.
C. All the nuclei involved in the nuclear reaction represent the same
element.
D. The nucleons in the original nuclei are destroyed by the process.
Answers
Answer:
B. The products are nuclei of elements that are different from the original elements.
enna took an open bowl of leftover mashed potatoes from the refrigerator and noticed a difference in smell. She determined that chemical changes occurred since the potatoes were first placed there.
Which observations most likely led to Jenna’s conclusion?
a change of odor
a decrease in temperature
a change in moisture content
a decrease in mass
Answers
Sorry this is a bit long
b. The following reaction takes place in an acidic solution. Use the following steps to balance the equation. (5 points)
Zn(s) + NO3–(aq) Zn2+(aq) + NO(g)
i. Write the reduction and oxidation half-reactions (without electrons). (1 point)
ii. Balance the equations for atoms. Use H2O and H+ to balance O and H. (1 point)
iii. Balance the equations for charge. (1 point)
iv. Equalize charges for the two half-reactions. (1 point)
v. Add the equations and simplify to get a balanced equation. (1 point)
Answers
The overall balanced reaction equation is;
4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)
What is the balanced reaction equation?The redox reaction equation is said to be balanced when the number of electron gained is equal to the number of electrons lost.
Now;
1. Reduction and oxidation half-reactions
Zn(s) -----> Zn^2+(aq) + 2e
And
NO3^-(aq) ---->NH4^+(aq) + 3H2O(l)
2. Using the H2O and H+ to balance O and H;
4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)
3. Balancing the electrons lost and gained; 4Zn(s) + 10H^+(aq) + NO3^-(aq) + 8e -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l) + 8e
4. The overall balanced reaction equation is;
4Zn(s) + 10H^+(aq) + NO3^-(aq) -----> 4Zn^2+(aq) + NH4^+(aq) + 3H2O(l)
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You have been asked to determine the thermometer correction for a melting point apparatus. You obtain a pure sample of benzoic acid and determine its melting point range carefully. After several trials, you obtain a very sharp melting point of 125.7 degrees celsius. What is the thermometer correction at this temperature
Answers
The thermometer correction at this temperature is =125.7 -122.4
=3.3 degrees celsius
(Very pure benzoic acid has a melting point of 122.4 degrees Celsius.)
ThermometerA thermometer is a device used to measure and display temperature. It normally consists of a short, glass tube that is hermetically sealed, graduated, and has a mercury or alcohol bulb at one end that expands and contracts with temperature changes.
Calibration of thermometers:-A significant source of measurement error in melting points could be our thermometer. It is occasionally possible for ordinary laboratory thermometers to be inaccurate and to read temperatures up to 10°C high or low. we should calibrate your thermometer regularly to identify any errors and be able to make adjustments. This will help us avoid this issue.
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How many moles of NH3 would be formed from the complete reaction of 16.0 g H2?
Answers
Taking into account the reaction stoichiometry, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.
Reaction stoichiometryIn first place, the balanced reaction is:
N₂ + 3 H₂ → 2 NH₃
By reaction stoichiometry (that is, the relationship between the amount of reagents and products in a chemical reaction), the following amounts of moles of each compound participate in the reaction:
N₂: 1 moleH₂: 3 molesNH₃: 2 molesThe molar mass of the compounds is:
N₂: 14 g/moleH₂: 2 g/moleNH₃: 17 g/moleThen, by reaction stoichiometry, the following mass quantities of each compound participate in the reaction:
N₂: 1 mole ×14 g/mole= 14 gramsH₂: 3 moles ×2 g/mole= 6 gramsNH₃: 2 moles ×17 g/mole=34 gramsMass of NH₃ formedThe following rule of three can be applied: if by reaction stoichiometry 6 grams of H₂ form 2 moles of NH₃, 16 grams of H₂ form how many moles of NH₃?
[tex]moles of NH_{3}= \frac{16 grams of H_{2} x2moles of NH_{3}}{6 grams of H_{2}}[/tex]
moles of NH₃= 5.33 moles
Then, 5.33 moles of NH₃ are formed from the complete reaction of 16 grams of H₂.
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In an endothermic reaction, what happens to the surroundings?
A. The bond energy is greater than 600 kJ.
B. The bond energy is less than 600 kJ.
C. The temperature increases.
D. The temperature decreases.
Answers
Answer: the temperature decreases
Explanation:
- An endothermic reaction absorbs heat which is taken from its immediate surroundings, causing the temperature to decrease
hope this helps :)
500 cm3 of H2 gas at STP
Contradictions of hydrogen
Answers
Answer:
letter to your mother telling her about the celebrations of your birthday at school
Ferric chloride is being applied for coagulation at a 15.0 MGD surface water treatment plant, at a rate of 195 pounds per day. At this application rate, how many pounds of this chemical will be used in a 30-day month
Answers
5850 pounds of this chemical will be used in a 30-day month.
195 pounds per day.
So, 30 days = 195 * 30
= 5850 pounds
Iron(III) chloride is the inorganic compound with the components FeCl 3. additionally known as ferric chloride, it is a commonplace compound of iron inside the +3 oxidation country. The anhydrous compound is crystalline and stable with a melting point of 307.6 °C.
The primary use of ferric chloride is to dispose of impurities in water and for wastewater treatment. Ferric chloride is likewise one of the few water remedy chemical compounds that can sequester odors.
Reasonably poisonous with the aid of ingestion but a strong irritant to the skin and eyes. it's far moderately corrosive and skin touch should be avoided and avoid skin and eye contact.
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2. The force of attraction between the particles is greater in ice than in water.
True or false
Answers
Answer:
true
Explanation:
your answer is ture
The statement is true: the force of attraction between particles is greater in ice than in water.
The force of attraction between particles (molecules or atoms) is greater in ice than in water. In the solid state, such as in ice, the particles are closely packed in a regular crystalline structure. The intermolecular forces, specifically hydrogen bonding between water molecules, are strong, leading to a higher force of attraction.
In contrast, in the liquid state, such as in water, the particles have more freedom of movement. The intermolecular forces are still present but are weaker compared to the solid state, resulting in a lower force of attraction between the particles.
Therefore, the statement is true: the force of attraction between particles is greater in ice than in water.
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What mass of Na2CrO4 is required to precipitate all of the silver ions from 75.0 mL of a 0.100 M solution of AgNO3
Answers
The mass of [tex]Na_2CrO_4[/tex] required will be 0.6075 g.
Calculation of mass:
The reaction:
[tex]Na_2CrO_4 + 2AgNO_3 \rightarrow Ag_2CrO_4 + 2NaNO_3[/tex]
Volume of [tex]AgNO_3[/tex] = 75 mL
Concentration of [tex]AgNO_3[/tex] = 0.100 M
Step 1:
Molarity is moles of solute in 1000 mL of the solution.
[tex]M=\frac{n}{V}\times 1000\\\\ n=\frac{M\times V}{1000} \\\\n=\frac{0.100\times 75}{1000}\\\\n= 0.0075[/tex]
Moles of [tex]AgNO_3[/tex] = 0.0075
Step 2:
From the above equation,
2 moles of [tex]AgNO_3[/tex] is precipitated by 1 mole of [tex]Na_2CrO_4[/tex]
So, 0.0075 moles will be precipitated by-
[tex]\frac{1}{2}\times 0.0075[/tex] moles of [tex]Na_2CrO_4[/tex]
= 0.00375 moles of [tex]Na_2CrO_4[/tex]
Step 3:
[tex]mole=\frac{Given \,weight}{Molar\, mass} \\[/tex]
Molar mass of [tex]Na_2CrO_4[/tex] = 162 g/mol
[tex]0.00375=\frac{x}{162} \\x= 0.00375\times 162\\x= 0.6075 g[/tex]
So, Mass of [tex]Na_2CrO_4[/tex] required will be 0.6075 g.
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Set up the math problem. But don’t do any of it. Just leave your answer as a math expression. Also be sure you’re answering clues all the correct the units symbols.
Answers
Answer:
Length = 681 grams / (44.5 grams / kilometers) = (681 / 44.5) kilometers
Explanation:
The diameter is there to throw us off, so ignore that. There is 681 grams of wire, and since there is 44.5 grams of copper per km of wire, and we want to know how many kilometers of wire makes 681 grams, the equation would be X*44.5 = 681, or X = 681/44.5
Also quora's censoring system is terrible i can't even say kilometers by adding the letter s after "km"
Samples of this drawing medium have been dated back to 30,000 BCE. Group of answer choices silverpoint charcoal pencil color pencil pastel
Answers
Charcoal is the sample of this drawing medium have been dated back to 30,000 BCE and is denoted as option B.
What is Charcoal?This is referred to a black carbon residue which is heated in insufficient oxygen to give it a light weight.
It is used for drawing and has been in existence for as long as 30,000 BCE hence the reason why it is the most appropriate choice.
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Write the complete chemical formula for the unknown compound.
Answers
The complete chemical formula for the unknown compound will be [tex]C_2H_6[/tex]
Chemical formulaThe chemical formula of the compound is [tex]C_2H_x[/tex] and x is supposed to be a whole number.
In the analysis, C = 2.22 moles and H = 6.7 moles
Dividing both by the smallest: C = 1 and H = 3
Thus, the empirical formula of the compound will be [tex]CH_3[/tex]
But since the compound is [tex]C_2H_x[/tex], it means both C and H are multiplied by 2.
The chemical formula will, therefore, be [tex]C_2H_6[/tex]
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You are a paleontology professor working at a dig site looking for fossils. You come across a deposit that is emitting radiation. Upon further testing you find that the sample is changing from carbon (atomic number 6) into nitrogen (atomic number 7) as radiation is emitted. What type of radiation is it?
A. Gamma
B. Delta
C. Beta
D. Alpha
Answers
The type of radiation in this scenario is Beta and is denoted as option C.
What is Beta radiation?This is a high-speed electron which is emitted when the nucleus undergoes a radioactive decay during the process of beta decay.
In this scenario the electron is denoted as e with a superscript and subscript of 0 and -1 respectively which is the reason for the change from carbon to nitrogen.
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