A chemical is placed on a balance in an airtight container. the balance initially reads 200.0 g.200.0 g. what will the balance read after the chemical is ignited and completely burned?
Answers
Based on the law of conservation of mass, the reading of the balance will be 200.0 g.
What will be the reading of the balance after the chemical is completely burnt?According to the law of conservation of mass, matter cannot be created nor destroyed but can change from one from to another.
In the given experiment, the chemical is placed on a balance in an airtight container and weighed bore it was ignited and allowed to burn completely. This means that the reaction occurred in a closed system, such that matter is not being exchanged with the surrounding.
The reading obtained in the balance before the reaction took place took into account the amount of air present in the container.
Therefore, no change in the reading of the balance will be observed and the balance will read 200.0 g.
Lear more about law of conservation of matter at: https://brainly.com/question/12733091
#SPJ1
Related Questions
When two ice skaters initially at rest push off one another, their final
momenta are..."
Answers
Answer:B
Explanation:
Describe how spead, velocity and
brcoloration are related.
Answers
Answer:
Speed, being a scalar quantity, is the rate at which an object covers distance. The average speed is the distance (a scalar quantity) per time ratio. On the other hand, velocity is a vector quantity; it is direction-aware. Velocity is the rate at which the position changes.
Does anyone know what 5.7365 x 10^-5 + 3.4891 x 10^-8 is? in scientific notation preferably?
Answers
Answer:
5.7400 × 10⁻⁵
Explanation:
Maria just got her driver's license and is driving to school for the first time. Which of the following would demonstrate that energy causes change?
Group of answer choices
A.She is stopped at a red light.
B.She is parked in her assigned parking space.
C.She pushes the gas pedal when the light turns green.
D.She is stopped waiting for some students to cross the street
(SCIENCE NOT CHEMISTRY) ;-;
Answers
presented with two tubes: one tube with a buffered solution + acid and one tube with water + acid, how will you know which tube has the buffer and which tube does not have the buffer?
Answers
One tube has a buffered solution + acid and the other tube has water + acid. To decide whether or not the solution is buffered, a simple pH test can be done. An acid-base indicator can be used to determine the pH of each solution.
A buffered solution is defined as a solution that can withstand minor changes in pH upon the addition of small amounts of an acid or base.
Consider the following steps:
To both tubes, add a small amount of acid-base indicator. Determine the pH of each solution by observing the color change of the acid-base indicator when it is added to it. The pH of the solution is determined by the color of the acid-base indicator after it has been added to it. Compare the pH of the two solutions. The solution with the lower pH is likely to have a buffer, whereas the solution with the higher pH is unlikely to have a buffer. This is due to the fact that the addition of an acid to a buffered solution would result in a lower pH, whereas the addition of an acid to an unbuffered solution would result in a higher pH. To find out which tube has the buffer and which does not, one has to compare the pH of each solution.Learn more about buffer: https://brainly.com/question/9458699
#SPJ11
what is the balanced form of equation for Sodium plus chlorine equals to sodium chloride
Answers
Answer:
Na (s) + Cl2 (g) → NaCl (s)
Explanation:
A reaction of sodium with chlorine to produce sodium chloride is an example of a combination reaction. 2 Na + Cl 2 → 2 NaCl.
In the titration of a solution of weak monoprotic acid with a 0. 1525 m solution of naoh, the ph half way to the equivalence point was 4. 48. in the titration of a second solution of the same acid, exactly twice as much of a 0. 1525 m solution of naoh was needed to reach the equivalence point. what was the ph half way to the equivalence point in this titration
Answers
The pH half way to the equivalence point in the second titration would be 4.96.
What is titration?Titration is a laboratory technique used to determine the concentration of a sample solution by measuring the volume of a known concentration of a reagent that is added to the sample solution. It is a quantitative analysis method used to determine the amount of a certain substance present in a given solution. It is most commonly used in acid-base titrations, in which the concentration of an acid or base is determined by measuring the volume of a known concentration of a base or acid required to neutralize it.
This is because twice as much of the 0.1525 m NaOH solution was needed to reach the equivalence point, thus the pH would be twice as high as the first titration. This would indicate that the second solution of weak monoprotic acid was more dilute than the first.
To know more about titration click-
https://brainly.com/question/186765
#SPJ4
What is the concentration of an aqueous solution that contains 1.5 moles of NaCl in 500. milliliters of this solution? (3) 3.0 M (4) 7.5 M (1) 0.30 M (2) 0.75 M
Answers
The concentration of the solution containing 1.5 moles of NaCl in 500 milliliters is (option) 3) 3.0 M.
The concentration of an aqueous solution can be calculated by dividing the number of moles of solute by the volume of the solution in liters.
To find the concentration, we need to convert the volume of the solution from milliliters to liters. Since 1 liter is equal to 1000 milliliters, the volume of the solution is 500 milliliters divided by 1000, which is 0.5 liters.
Next, we divide the number of moles of NaCl by the volume of the solution in liters to calculate the concentration. In this case, we have 1.5 moles of NaCl.
Concentration (M) = moles of solute / volume of solution (in liters)
Concentration = 1.5 moles / 0.5 liters = 3.0 M
Therefore, the concentration of the solution is 3.0 M.
To learn more about concentration of an aqueous solution click here: brainly.com/question/30151276
#SPJ11
According to VSEPR theory, what is the bond angle of CCl4?
a. 90
b. 109.5
c. 120
d. 180
Answers
The first excited vibrational energy level of diatomic chlorine (Cl2) is 558 cm−1 above the ground state. Wavenumbers, the units in which vibrational frequencies are usually recorded, are effectively units of energy, with 1 cm−1=1.986445∗10−23 J. A. If every vibrational energy level is equally spaced, and has a degeneracy g, of 1 , sum over the lowest 4 vibrational levels to obtain a vibrational partition function Q, for chlorine at 25∘C. Your answers will be as sum of exponentials, simplify them as much as you can. B. Let the N1 and N2 be the population of chlorine molecules in the first and second excited vibrational energy levels respectively. Find the relative population between the excited states N1N2, at 298 K(25∘C) [Convert energy into Joules first before finding the exponentials for the partition function. See practice problem set 5 . The ground state is at 0 J energy level. The Boltzmann constant, kB= 1.38065×10−23 J]
Answers
The vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is given by the simplified expression: Q = e^(-2.220).
The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.
The vibrational partition function (Q) represents the sum of the Boltzmann factors for all the vibrational energy levels. For a diatomic molecule like chlorine (Cl2), assuming equally spaced vibrational energy levels and a degeneracy (g) of 1 for each level, we can calculate the partition function.
To calculate Q, we sum over the lowest 4 vibrational levels, taking into account the energy spacing between levels.
The energy spacing between levels is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.
Using the formula for the partition function:
Q = e^(-E1/(kT)) + e^(-E2/(kT)) + e^(-E3/(kT)) + e^(-E4/(kT))
Substituting the values:
Q = e^(-5581.98644510^(-23)/(1.3806510^(-23)(25+273)))
Simplifying the exponent and performing the calculations:
Q ≈ e^(-2.220)
Therefore, the vibrational partition function (Q) for chlorine at 25°C, summing over the lowest 4 vibrational levels, is approximately e^(-2.220).
The relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) can be calculated using the relative Boltzmann factors, taking into account the energies of the levels and the Boltzmann constant.
The relative population (N1/N2) between two vibrational energy levels can be determined using the Boltzmann factors, which depend on the energies of the levels and the temperature.
The energy difference between the ground state and the first excited level is given as 558 cm^(-1), which we convert to Joules using the conversion factor of 1 cm^(-1) = 1.986445 × 10^(-23) J.
Using the Boltzmann factor formula:
N1/N2 = e^(-ΔE/(k*T))
Substituting the values:
N1/N2 = e^(-5581.98644510^(-23)/(1.38065*10^(-23)*298))
Simplifying the exponent and performing the calculations:
N1/N2 ≈ e^(-1.524)
Therefore, the relative population between the first and second excited vibrational energy levels (N1/N2) of chlorine at 298 K (25°C) is approximately e^(-1.524).
Note: The relative population is given as a ratio of the populations between the two levels.
Learn more about Boltzmann factors here: brainly.com/question/30763196
#SPJ11
What does the atomic mass come from on the periodic table?
Answers
The atomic mass comes from isotopes on the periodic table.
Predict the products when 1-propanol is heated in the presence of an acid? There are two products. I have one of them 1-propene, what is the second product?
Answers
When 1-propanol is heated in the presence of an acid, the reaction produces two products: 1-propene and water.
This reaction is known as an ether cleavage, and it is commonly used in the production of propene and other hydrocarbons.
It is an exothermic reaction, meaning that the heat generated from the reaction increases the rate of the reaction.
The other product of this reaction is water, which is produced when hydrogen from the 1-propanol molecule is removed and replaced with a hydroxyl group.
This reaction is an example of an acid-catalyzed dehydration, where an alcohol molecule is converted into an alkene molecule by the removal of the OH group and the addition of a hydrogen atom from the acid. The overall reaction is: C3H7OH + H2O → C3H6 + H3O+.
To learn more about water, click here;
https://brainly.com/question/28465561
#SPJ4
In the photo
Pls pls pls pls pls pls pls pls pls pls
Answers
When an object has potential energy, it means that the object has pent up energy that isn’t being used yet. It is about to do something, but it is at the climax and hasn’t done it yet. For example, if you’re winding up your arm, ready to throw a ball, the energy in the ball isn’t released yet. But, if you were to throw it, it now has kinetic energy.
Kinetic energy happens when an object is in motion. While it is moving, it releases kinetic energy, like my ball example.
Hope this helps! :)
The correct answers are Potential and Kinetic energy.
What are potential energy and examples?An object can store energy as a result of its position. For example, the heavy ball of a demolition machine is storing energy when it is held at an elevated position. This stored energy of position is referred to as potential energy. Similarly, a drawn bow is able to store energy as a result of its position.
What is kinetic energy?Kinetic energy is a form of energy that an object or a particle has by reason of its motion. If work, which transfers energy, is done on an object by applying a net force, the object speeds up and thereby gains kinetic energy.
Learn more about Energy at https://brainly.com/question/13881533
#SPJ2
In a given population, which members are most likely to survive and produce offspring?
Answers
Answer:
Those individuals with advantageous traits are more likely to survive and reproduce. The survivors pass down these advantageous traits to their offspring.
Explanation:
What is meant by exposure route?
Answers
Exposure route can be defined as a way by means of which a person can come in contact with the hazardous chemicals, this can be prevented by wearing personal protective equipments.
What are personal protective equipments?
Personal protective equipment is a protective clothing which is worn to protect the wearer's body from hazard or injury.The hazards which can be addressed by the use of personal protective equipment are physical,chemical and bio hazards.
It imposes a barrier between the user and the working environment.The main purpose of personal protective equipment is to reduce exposure of employees to the hazards.
It has a limitation that it does not eliminate the hazard and may lead to harm to the employee if the equipment is damaged.
Learn more about personal protective equipment,here:
https://brainly.com/question/17663098
#SPJ1
Calculate the pH at the equivalence point in titrating 0. 100 M
solution of HBr with 0. 080 M NaOH:
Answers
The pH at the equivalence point in titrating the 0. 100 M solution of HBr with 0. 080 M NaOH is 7.
The Concentration of the HBr = 0.100 M
The Concentration of the NaOH = 0.080 M
The chemical equation is as follows :
HBr + NaOH → NaBr + H₂O
The HBr is the strong acid, and the NaOH is the strong base. When the strong acid is titrated with the strong base, then an equivalence point is always be obtained at the pH = 7.0.
Thus, the pH at the equivalence point in titrating the 0. 100 M solution HBr is the 7.0.
To learn more about pH here
https://brainly.com/question/15289741
#SPJ4
typically if oxygen has a formal negative charge, it is participating in ____ covalent bond(s).
Answers
If oxygen has a formal negative charge, it is typically participating in one covalent bond.
When oxygen has a formal negative charge, it means it has gained one additional electron, resulting in a net negative charge. In covalent bonding, atoms share electrons to achieve a more stable electron configuration.
Oxygen has six valence electrons, and in its neutral state, it forms two covalent bonds by sharing two electrons with other atoms. However, when oxygen gains one electron and acquires a formal negative charge, it now has seven valence electrons.
To achieve a stable electron configuration, oxygen with a formal negative charge will typically form a single covalent bond with another atom, sharing one electron.
By doing so, oxygen can complete its octet, having a total of eight valence electrons, which is a stable electron configuration.
When oxygen has a formal negative charge, it generally participates in one covalent bond to achieve a stable electron configuration with eight valence electrons.
To learn more about covalent, visit
https://brainly.com/question/26167153
#SPJ11
How many seconds are in .079 years? (conversation factors)
Answers
Answer:
2491344 seconds
Explanation:
By the way Google has a conversion system just in case you want to use it. Just google time conversion. It also does other types of conversion like Volume and Weight.
What is the pH with a [H+] of 1.3x10-5M?
Answers
Answer: pH=−log(3.1×10−3M)=2.508638306 =2.51
Explanation:
There are two ways you can do this. The easy way is to realize that
HCl
is a strong acid, so its dissociation is considered complete, and
[HCl]=[H+].
EASY WAY
Recall:
pH=−log[H+]
From the knowledge that
pH=−log[H+]=−log[HCl], we can say:
pH=−log(3.1×10−3M)=2.508638306 =2.51
What happens to the temperature of copper when it melts?
Answers
Answer:
Copper encompasses a relatively low softening point, around 1075 degrees C. You'll dissolve little sums with a blowtorch. To soften sufficient for casting you'll require a heater of a few kind. This require be small more than some of tin cans.
Please help due in 5 min. I need this to be done or my grade will drop from a 96 to a 32.
Calculate the energy and frequency of red light having a wavelength of 6.55 x 10^-5 cm.
Answers
Answer:
E = 3.035× 10-¹⁹J = 1.9eV
f = 4.58 × 10¹⁴Hz
Explanation:
wavelength = 6.55 × 10-⁷m
c = 3 × 10⁸m/s
f = ?
E = ?
a) f = c/wavelength
f = 3 × 10⁸/6.55 × 10-⁷
f = 4.58 × 10¹⁴Hz
b) E = hc/wavelength
E = 6.626×10-³⁴ × 3 × 10⁸/ 6.55 × 10-⁷
E = 3.035 × 10-¹⁹J
1ev = 1.6 × 10-¹⁹J
Therefore E = 3.035/1.6 = 1.9eV
Explanation:
speed of light = wavelength * frequency
frequency =speed of light/wavelength
Let frequency = F
Speed of light = 3.0 *10^8
wavelength = 6.55 * 10^-5 cm = 6.55 * 10^-7m
Therefore F= 3.0 *10^8m/s *6.55 * 10^-7m
F = 196.5Hz
Energy = Planck's constant * frequency
Let energy be E
Planck's constant = 6.63 * 10^-34Joule/ seconds
E = 6.63 * 10^-34 * 196.5Hz
E=1.3027 * 10^-31 J
3. Explain why ionic compounds are "fixed" in their chemical composition.
Answers
Answer: Ionic compounds are "fixed" in their chemical composition as forces present between atoms of these compound are strong electrostatic forces of attraction due to which these compounds have fixed chemical composition.
Explanation:
Compounds formed by transfer of electrons from one atom to another are called ionic compounds.
For example, sodium atom on losing its one valence electron forms \(Na^{+}\) ion and when a chlorine atom gains this electrons then it forms \(Cl^{-}\) ion. These ions when come closer then an electrostatic force of attraction will pull them together forming NaCl compound.
Therefore, one atom of sodium is chemically combining to one atom of chlorine to form NaCl.
As the forces present between atoms of an ionic compound are strong electrostatic forces of attraction due to which these compounds have fixed chemical composition.
Thus, we can conclude that ionic compounds are "fixed" in their chemical composition as forces present between atoms of these compound are strong electrostatic forces of attraction due to which these compounds have fixed chemical composition.
Ionic compounds are formed when there is a donation of an electron from one element to another that receives the electron. This causes the donating atom to attain a positive charge and the receiving atom to attain a negative charge. The ions thus formed are held by strong electrostatic forces that hold them together.
Ionic bonds are formed through the transfer of electrons from one element to another which receives the electron.Positive and negative ionic charges are thus acquired by the respective elements. Strong electrostatic forces that act in all directions hold the ions together. This also gives them the fixed state that makes it more difficult to break them up when compared to the covalent bonds. So, the strong electrostatic forces cause the fixed state of ionic compounds.
Learn more here:
https://brainly.com/question/22760798
Who is my favourite wrestler?
Answers
Answer:
ma herdina thesto wrestling
Help fast !
If I have an unknown quantity of gas at a pressure of 102 kPa, a volume of 31 liters, and a temperature of 87 0C, how many moles of gas do I have?
Answers
Answer:
1 mole represents 6.023×1023 particles.
1 mole of iodine atom= 6.023×1023
Given 127.0g of iodine.
no. of iodine atom = 1 mole of iodine
1mole of magnesium = 24g of Mg = 6.023×1023no.of Mg
Given 48g of Mg = 2×6.023×1023
no. of Mg = 2 moles of Mg
1 mole of chlorine atom= 6.023× 1023
no. of chlorine atom = 35.5g of chlorine atom
Given 71g of chlorine atom=2× 6.023× 1023
no. of chlorine atom = 6.023×1023
2 moles of chlorine atom.
Given that 4g of hydrogen atom.
will be equal to 4 × 6.023 × 1023
no. of atoms of hydrogen= 4 moles of hydrogen atom.
What type of energy is stored in the bonds of chemical compounds? chemical energy compound energy element energy kinetic energy.
Answers
Answer:
chemical energy, Energy stored in the bonds of chemical compounds. Chemical energy may be released during a chemical reaction, often in the form of heat; such reactions are called exothermic.
Answer:
Chemical Energy
Explanation: Chemical compounds contain chemical energy in their bonds.
Despite what is portrayed in science fiction movies, if you witnessed a battle in outer space, you would not hear sound. Explain why.
Answers
Answer:
The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.
Explanation:
The vacuum of outer space has essentially zero air. Because sound is just vibrating air, space has no air to vibrate and therefore no sound.
Answer:
There is no air in space for sound waves to travel
Which of these is true of a chemical reaction?
Energy is always transferred from reactants to products.
Energy is always transferred from products to reactants.
Energy is not transferred.
Energy is transferred between products and reactants.
Answers
Answer:
Energy is transferred between products and reactants.
Explanation:
took the k12 quiz and got it correct
To solve such this we must know the concept of chemical reaction. Therefore, the correct option is option B that is energy is transferred between products and reactants.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved.
There are so many types of chemical reaction reaction like combination reaction, double displacement reaction. Energy is transferred between products and reactants in a reaction. Energy is always transferred. There are many ways to identify the chemical reaction.
Therefore, the correct option is option B that is energy is transferred between products and reactants.
Learn more about the chemical reactions, here:
https://brainly.com/question/3461108
#SPJ5
in the following unblanced equation, how many moles of water will be prodused from 6 moles of oxygen gas? c3h8+o2=co2+h20
Answers
The 6 moles of oxygen gas, approximately 4.8 moles of water will be produced in this reaction.
In the given unbalanced equation: C3H8 + O2 = CO2 + H2O, we are interested in determining the number of moles of water (H2O) produced from 6 moles of oxygen gas (O2).
First, let's balance the equation:
C3H8 + 5O2 = 3CO2 + 4H2O
From the balanced equation, we can see that 4 moles of water are produced for every 5 moles of oxygen gas consumed. Therefore, if we have 6 moles of oxygen gas, we can set up a proportion:
5 moles of O2 --> 4 moles of H2O
6 moles of O2 --> x moles of H2O
Using the proportion, we can solve for x (the number of moles of water):
(6 moles O2 * 4 moles H2O) / 5 moles O2 = 4.8 moles of H2O
For more such questions on oxygen
https://brainly.com/question/15457775
#SPJ11
element x reacts with the elements of group 17 (viia) of the periodic table. the compounds produced in these reactions have one atom of element x for every one atom of a group 17 element. to which group does element xmost likely belong?
Answers
Element X most likely belongs to group 1 (alkali metals) of the periodic table. The reactivity of alkali metals with group 17 (halogens) is well known and follows the general equation M + X2 → MX, where M represents an alkali metal and X represents a halogen.
This reaction results in the formation of ionic compounds in which the alkali metal has a positive charge and the halogen has a negative charge. This reaction also follows the octet rule, where both the alkali metal and the halogen achieve a full outer shell of electrons.
Therefore, given the information provided, it is highly likely that Element X has only one valence electron, making it a member of group 1, and reacts with group 17 elements to form ionic compounds.
To know more about the ionic compounds refer here :
https://brainly.com/question/3222171#
#SPJ11
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Answers
Answer:Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.
Explanation:
Question
Select the correct answer. Sami was blowing soap bubbles in his room where the temperature was 23 °C and the pressure was constant. He blew a soup bubble of volume 45 mL. The bubble suddenly escaped from the window where the temperature outside was 12 °C. Explain what will happen to the soap bubble? The volume of the soap bubble will increase to 46.73 mL. The volume of the soap bubble will increase to 86.25 mL. The volume of the soap bubble will decrease to 23.47 mL. The volume of the soap bubble will decrease to 43.33 mL.