Taking into account the definition of calorimetry, the mass of water is 35.70 grams.
What is calorimetryCalorimetry is the measurement and calculation of the amounts of heat exchanged by a body or a system.
Sensible heat is defined as the amount of heat that a body absorbs or releases without any changes in its physical state (phase change).
So, the equation that allows to calculate heat exchanges is:
Q = c× m× ΔT
where:
Q is the heat exchanged by a body of mass m.c is the specific heat substance c. ΔT is the temperature variation.Mass of water in this caseIn this case, you know:
For granite:
Mass of granite= 126.1 gInitial temperature of granite= 92.6 °CFinal temperature of granite= 51.9 ºCSpecific heat of granite = 0.795 [tex]\frac{J}{gC}[/tex]For water:
Mass of water = ?Initial temperature of water= 24.7 ºCFinal temperature of water= 51.9 ºCSpecific heat of water = 4.186 [tex]\frac{J}{gC}[/tex]Replacing in the expression to calculate heat exchanges:
For gold: Qgranite= 0.795 [tex]\frac{J}{gC}[/tex] × 126.1 g× (51.9 °C - 92.6 °C)
For water: Qwater= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× (51.9 °C - 24.7 °C)
If two isolated bodies or systems exchange energy in the form of heat, the quantity received by one of them is equal to the quantity transferred by the other body. That is, the total energy exchanged remains constant, it is conserved.
Then, the heat that the gold gives up will be equal to the heat that the water receives. Therefore:
- Qgranite = + Qwater
- 0.795 [tex]\frac{J}{gC}[/tex] × 126.1 g× (51.9 °C - 92.6 °C)= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× (51.9 °C - 24.7 °C)
Solving:
4,080.15465 J= 4.186 [tex]\frac{J}{gC}[/tex]× mass of water× 27.3 °C
4,080.15465 J= 114.2778 [tex]\frac{J}{g}[/tex]× mass of water
mass of water= (4,080.15465 J)÷ 114.2778 [tex]\frac{J}{g}[/tex]
mass of water= 35.70 grams
Finally, the mass of water is 35.70 grams.
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What is the volume of a gas if 0.182 moles of the gas is at 1.99 atm and 83.4oC?
Answer:
2,67 L
Explanation:
Which information must be known about a compound to find the molecular formula from the empirical formula?
Answer:
Empirical formulas can be determined from the percent composition of a compound. In order to determine its molecular formula, it is necessary to know the molar mass of the compound. Chemists use an instrument called a mass spectrometer to determine the molar mass of compounds.
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Describe the difference between the rate of diffusion seen for sodium and urea.
The begining of this chemical equation represents the starting materials for a chemical reaction
which compound us likely produced by the chemical reaction H20+ SO3
Draw a diagram using H+ signs and OH- symbols of a solution that is acidic. Hint: Use the
diagram seen in the prelab.
WILL MARK BRAINLIEST!!!!
More positive ions shows acidic whereas more negative ions indicates basic solution.
Which charge show acidic solution?That side which has more positive charges is considered as acidic solution while on the other hand, that region where negative charges are present in large number as compared to positive charges is considered as basic or alkaline solution.
So we can conclude that more positive ions shows acidic whereas more negative ions indicates basic solution.
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What is the speed of light written in standard numerical form?
Explain how each property affects the energy in a wave:
Amplitude:
Wave speed:
Wavelength:
Frequency:
Answer:Amplitude:the maximum displacement or distance moved by a point on a vibrating body or wave measured from its equilibrium position. It is equal to one-half the length of the vibration path.Wave speed:Wave speed is the distance a wave travels in a given amount of time, such as the number of meters it travels per second. Wave speed is related to wavelength and wave frequency by the equation: Speed = Wavelength x Frequency. This equation can be used to calculate wave speed when wavelength and frequency are known.Wavelength:Wavelength is the distance between identical points (adjacent crests) in the adjacent cycles of a waveform signal propagated in space or along a wire. In wireless systems, this length is usually specified in meters (m), centimeters (cm) or millimeters (mm).Frequency:frequency, in physics, the number of waves that pass a fixed point in unit time; also, the number of cycles or vibrations undergone during one unit of time by a body in periodic motion.
Explanation:
Determine the number of moles of O,(g) in the cylinder. The gram-formula mass of
Og (g) is 32.0 g/mol.
The number of mole of oxygen gas, O₂ in the cylinder given the data is 0.5 mole
Description of moleThe mole of a substance is related to it's mass and molar mass according to the following equation:
Mole = mass / molar mass
How to determine the mole of O₂From the question given, the following data were obtained:
Mass of O₂ = 16 g gMolar mass of O₂ = 32 g/mol Mole of O₂ =?Mole = mass / molar mass
Mole of O₂ = 16 / 32
Mole of O₂ = 0.5 mole
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Which statements describe proper use of a filter funnel?
Answer:
Fold the filter paper in fourths before placing it in the funnel and pour all the liquid through the funnel.
A sample of gas at a constant temperature has an initial volume of 14.5L at a pressure of 720mmHg. If the volume of gas is decreased to 10.5L, what is its pressure?
The new pressure of the gas would be 994 mmHg
Gas lawAccording to Charle's law, the pressure of a gas at a constant temperature varies inversely with its volume.
Mathematically: p1v1 = p2v2, where p1 and p2 = initial and final pressure, and v1 and v2 = initial and final volume.
In this case, v1 = 14.5 L, p1 = 720 mmHg, and v2 = 10.5 L
p2 = p1v1/v2 = 720 x 14.5/10.5 = 994 mmHg
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Determine the number of neutrons in 20 grams Uranium-238
Answer:
146 neutrons
Explanation:
The atomic number of uranium (see periodic table) is 92, and the mass number of the isotope is given as 238. Therefore, it has 92 protons, 92 electrons, and 238 — 92 : 146 neutrons.
What happens when a solid is dissolved into a liquid?
O Solid particles float toward the surface layer of liquid particles.
O Solid particles sink down toward the bottom layer of liquid particles.
O Solid particles become evenly dispersed among liquid particles.
O Solid particles become suspended in the middle of liquid particles.
When a solid dissolves in a liquid to form a solution, solid particles become evenly dispersed among liquid particles.
What are solutions?Solutions are formed when a solute particle dissolves in another substance known as a solvent.
Usually, solutions are formed when solids dissolve in liquids.
The solid is the solute while the liquid is the solvent.
When a solid dissolves in a liquid, solid particles become evenly dispersed among liquid particles.
Therefore, solutions are formed when solute particles dissolve in solvents.
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Answer:
c
Explanation:
chem ed 2022
How many grams are in 4 moles of H2O?
Answer:
There are 72grams in 4 moles of H20
does lotus have shiny or dull body surface
Yes, it is true that the plant known as Lotus has a shiny surface.
What is Lotus?
This is referred to a type of plant which grows in mud and has micron- and nano-scale features.
It has a wax like surface which prevent dirt and water adhesion thereby making its surface to also be shiny and attracts insects for pollination in this regard.
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What is the formula for the ether functional group?
The formula for the functional group of ether is R–O–R– group. Details about functional group can be found below.
What is a functional group?A functional group is a specific grouping of elements that is characteristic of a class of compounds, and determines the chemical properties of that class.
Ether is any of a class of organic compounds containing an oxygen atom bonded to two hydrocarbon groups.
Therefore, the formula for the functional group of ether is R–O–R– group.
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Which of these is a challenge related to nuclear fusion reactions?
A. Waste products have a longer half-life.
B. It is technically challenging to create these reactions safely and
efficiently.
C. The fuel for nuclear fusion is less available than uranium-235.
D. There is less of a chance of runaway chain reactions.
Answer:B
Explanation:got it right
The statement, "It is technically challenging to create nuclear fusion reactions safely and efficiently", is related to nuclear fusion reaction. Thus, Option B is correct.
This is due to the need to reach and maintain the extreme temperatures and pressures required for the reaction to occur and to confine and control the plasma in which the reaction takes place.
Nuclear fusion is a promising source of energy that has the potential to provide abundant, clean & sustainable power. However achieving nuclear fusion requires overcoming several challenges including the technical difficulties of creating and controlling the extreme conditions required for the reaction to occur.
Fusion reactions can produce high-energy neutrons that can damage the materials used to contain the reaction and require special handling and disposal. While progress has been made in developing fusion technologies, there is still much work to be done to make fusion a viable source of energy for the future.
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If an object goes through a chemical reaction but does not change in mass that object has
Answer:
The law of conservation of mass
Explanation:
The law of conservation of mass
Select all that apply.
When the products of a reaction have a higher enthalpy than the reactants:
The change in enthalpy is positive.
The reaction is exothermic.
The reaction is endothermic.
The change in enthalpy is negative.
When the enthalpy of products is higher than that of reactants, such a reaction is said to be endothermic.
EnthalpyThe enthalpy of a system refers to the heat content of the system.
When the enthalpy of reactants is higher than that of products in a reaction, such a reaction is said to be exothermic. On the other hand, if the enthalpy of products is higher than that of the reactants, it is endothermic.
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Alkaline batteries are non-rechargeable.
Why do alkaline batteries eventually stop working?
Answer:
Alkaline batteries stop working when all of the manganese dioxide has been converted.
Explanation: Hope it helps you :)))
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Alkaline batteries eventually stop working because the chemicals inside them react and eventually use up all their energy.
The chemicals in an alkaline battery are zinc and manganese dioxide, which are separated by a separator. When the battery is used, zinc and manganese dioxide react to produce electricity.
The reaction between zinc and manganese dioxide is a one-way reaction, meaning that it cannot be reversed. This means that once the chemicals in the battery are used up, the battery will no longer produce electricity.
The rate at which an alkaline battery loses its charge depends on a number of factors, including the temperature, the amount of current being drawn from the battery, and the age of the battery.
In general, alkaline batteries will last longer in cool temperatures and when they are not being used heavily.
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An atom's electron configuration ends with 3p^3. if another atom has nine more electrons, what would be the continuation of the electron configuration?
The continuation of the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]
What is an electron configuration?Electronic configuration, also called electronic structure, is the arrangement of electrons in energy levels around an atomic nucleus.
The initial p-orbital (the [tex]3p^3[/tex]) is incompletely filled. Thus, the first thing would be to fill it completely ([tex]3p^6[/tex]) so as to obey the orbital-filling rule. This leaves 6 more electrons.
After 3p orbital, the next orbitals are 4s, 3d, 4p, 5s, etc.
The 4s orbital will take a maximum of 2 electrons, leaving 4 more electrons.
Next would be the 3d orbital which can take a maximum of 8 electrons, but only 4 electrons are left.
Thus, the electronic configuration would be [tex]3p^6, 4s^6, 3d^4.[/tex]and elements is Vanadium (V).
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