Answer:
127.15 °C
Explanation:
Gay-Lussac's law states that the pressure of a given mass of gas directly proportional to the absolute temperature of the gas at constant volume.
Mathematically,
P₁ / T₁ = P₂ / T₂ -----(1)
Data Given:
Initial Pressure = P₁ = 1 atm (assumed)
Initial Temperature = T₁ = -73°C = 200.15 K
Final Pressure = P₂ = 2 atm (doubled)
Final Temperature = T₂ = ????
Solving equation 1 for T₂,
T₂ = P₂ × T₁ / P₁
Putting these values;
T₂ = 2 atm × 200.15 K / 1 atm
T₂ = 400.3 K
Or,
T₂ = 127.15 °C
Conclusion:
By doubling the pressure results in increase in temperature.
The final temperature of the gas, when its pressure is doubled and volume held constant, increases from -73°C to 127°C.
To determine the final temperature of a gas when its pressure is doubled and volume remains constant, we use the Ideal Gas Law which can be expressed as PV = nRT.
When volume is held constant, the relationship between pressure and temperature is direct, i.e., P₁/T₁ = P₂/T₂Given the initial temperature (T1) is -73°C, which converts to 200 K (273 - 73), and the initial pressure (P1) is doubled to P₂= 2P₁, the formula becomes:
P₁ / 200 K = (2P₁) / T₂To find T₂ isolate T₂:
T₂ = 2 * 200 KT₂ = 400 KThus, the final temperature of the gas in degrees Kelvin is 400 K.
To convert back to degrees Celsius, subtract 273:
400 K - 273 = 127°CThe final temperature of the gas is 127°C.
Circle the term or phrase in parentheses that makes each statement true.
• 1. A substance that produces hydrogen ions in solution is (an acid, a base).
Is it an acid or a base
Answer:
A substance that produces hydrogen ions in solution is AN ACID.
Explanation:
In an aqueous solution, the solute is the part of the solution that is being dissolved in water.
True or False?
Find the mass, in grams, of 3.758 mol CH4. ( show work )
Answer:
The mass of CH4 is 60, 29 grams.
Explanation:
We use the weight of the atoms C and H for calculate the molar mass:
Weight of CH4= weight C+ 4 x weight H= 12,01 g/mol +4 x 1,008g/mol=
Weight of CH4 =16, 042 g/mol
1molCH4-----16, 042grams
3,758 mol CH4--X= (3,758 mol CH4 x 16, 042 grams)/1 mol CH4=60,285836 grams
ireally need help
Most substances _______ in temperature and _______ when heat is added to them.
A.
decrease; contract
B.
increase; expand
C.
increase; contract
D.
decrease; expand
if Gregory starts with 2.5 grams of CuO, how many grams of N2 can he theoretically form?
Answer:
0.2934 g of N₂
Explanation:
The balance chemical equation for given reaction is as follow;
2 NH₃ + 3 CuO → 3 Cu + N₂ + 3 H₂O
Step 1: Calculate Moles of CuO as;
Moles = Mass / M.Mass
Moles = 2.5 g / 79.54 g/mol
Moles = 0.0314 moles of CuO
Step 2: Find out moles of N₂ as;
According to equation,
3 moles of CuO produced = 1 mole of N₂
So,
0.0314 moles of CuO will produce = X moles of N₂
Solving for X,
X = 0.0314 mol × 1 mol / 3 mol
X = 0.0104 moles of N₂
Step 3: Calculate Mass of N₂ as;
Mass = Moles × M.Mass
Mass = 0.0104 mol × 28.01 g/mol
Mass = 0.2934 g of N₂
What is the balanced product of Ba(CN)2+(NH4)2SO4
Answer: Ba(CN)2 + (NH4)2SO4 => BaSO4 + 2 NH4CN
Explanation: The reaction will produce BaSO4 Barium sulfate and NH4CN Ammonium cyanide.
When humans burn fuel or
cut down trees, they (increase/decrease)
levels of carbon dioxide in the atmosphere.
Answer:
when humans burn fuel or cut down trees , the increase level of carbon dioxide in the atmosphere
The smell of hot food moves faster than the smell of cold food. Which property of gas is responsible for this? A. The kinetic energy of gas particles is higher in hot food than in cold food. B. The kinetic energy of gas particles is lower in hot food than than in cold food. C. The volume of gas molecules is higher in hot food than in cold food. D. The pressure exerted by gas molecules is higher in hot food than in cold food.
A. The kinetic energy of gas particles is higher in hot food than in cold food.
Explanation:
The smell of a hot food moves faster than the smell of a cold food because the kinetic energy of gas particles is higher in hot food than in cold food.
Let us establish that the smell of the food perceived are gases from the food.
Both hot food and cold food emits these gases that tinkers our olfactory nerves. Hot food produces a hot gas. The higher the temperature the more kinetic energy it possess. This makes the gases more dispersed and it spreads faster. The cold food produces gas at a lower kinetic energy.learn more:
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Final answer:
The smell of hot food moves faster than cold food because A. The kinetic energy of gas particles is higher in hot food than in cold food. As temperature increases, particles move faster, spreading the smell more quickly.
Explanation:
The smell of hot food moves faster than the smell of cold food because of the kinetic energy of gas particles. As the temperature of a substance increases, so does the kinetic energy of its particles. Higher kinetic energy results in particles moving faster, which facilitates quicker dispersion of the smell.
Therefore, the correct answer to this question is A. The kinetic energy of gas particles is higher in hot food than in cold food. The kinetic-molecular theory explains that an increase in temperature leads to a greater average kinetic energy of the particles. As a result, the particles in the gas move more rapidly and the scent of hot food diffuses more quickly than that of cold food.
Which statement is correct?
.
O
The volume of 1 mol of CO2 is greater than that of 2 mol of Oz.
The volume of 1 mol of CO2 is greater than that of 1 mol of Nz.
The volumes of 2 mol of O2 and 1 mol of N, gases are the same.
The volumes of 1 mol of CO2 and 1 mol of N, gases are the same.
Answer:
The volumes of 1 mol of CO2 and 1 mol of N2, gases are the same.
Explanation:
1 mole of a gas occupy 22.4L at stp. This is true for all gases. So,
1mol of CO2 = 22.4L
1mole of N2 = 22.4L
From the above illustration, 1mole of CO2 and 1mole N2 have the same volume at stp
Answer: The volumes of 1 mol of CO2 and 1 mol of N, gases are the same.
Explanation:
What is the valency of CH3COO
Answer:
The valency is 1.
Explanation:
Solar energy received by the Earth's surface causes the Earth's surface to heat up during the day. Which of the following heat transfer mechanisms is the main cause of the surface gaining heat? A. radiation B. convection C. conduction D. advection
Answer:
radiation
Explanation:
Select the correct statement to describe when a sample of water vapor condenses into liquid water.
Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined Temperature decreases, molecular motion increases, volume decreases, and shape becomes less defined Temperature increases, molecular motion decreases, volume decreases, and shape becomes less defined Temperature decreases, molecular motion increases, volume increases, and shape becomes more defined
Answer:
Explanation:
Final answer:
When water vapor condenses into liquid water, A) Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined compared to the gas.
Explanation:
The correct statement to describe when a sample of water vapor condenses into liquid water is A) Temperature decreases, molecular motion decreases, volume decreases, and shape becomes more defined. When water vapor cools down, the molecules lose kinetic energy and move less vigorously, which allows them to come closer together and form liquid water, a process known as condensation. This is also associated with a decrease in volume since the molecules are now more closely packed than they were in the gaseous state. Additionally, the shape becomes more defined because liquids have a definite volume but no definite shape, conforming to the shape of their container, unlike gases that fill the entire space available to them.
PLEASE ANSWER
Based on the chart below order each of the substances according to how fast sound waves would travel through them (1 fastest- 5 slowest):
Answer: fastest through steel
Explanation:
Sound waves travel fastest through solids, basically the one with the most density.
So fastest through steel
Then Al
Then water
Then ethanol
Then air
2. What's the kinetic energy of an object that has a mass of 12 kilograms and moves with a velocity of 10 m/s?
Explanation:
Energy
It is ability to do work .
There are so many forms of energy .
out of which mechanical energy is also one of the form .
Mechanical energy
It is the energy possessed by the body by virtue of its motion and state .
It is of two types :
Kinetic energy Potential energyKinetic energy
It is the energy possessed by the body by virtue of its motion .
Its expression is :
K.E=1/2mv²
Here in above question it is given that :
mass = 2Kg
V=10m/sec
K.E will be = 1/2 x 2 x 10 x 10
K.E=100 J
How many moles of O2 will be produced if you react 6 moles of KCIO3 ?
Answer:
12
Explanation:
2x6
Answer: 18 moles
Explanation:
in order to find that u need to take the coefficents of each of the compounds. that gives a ratio of 2:3.
now we find out how many each unit is: 2x = 12x = 6
now, we multiply it by 3 to find the number of moles of O23(6) = 18 mol O2.
Question 5 (1 point)
Your television converts
energy into ___
____ and sound energy.
chemical, electrical
Olight, electrical
O
electrical, light
O heat, light
Answer:
(a bit of heat) and light
Explanation:
it has the resistance in it so it will give heat when surpassed by a high tension
At low temperatures and pressure, how does the volume of a real gas compare with the volume of an ideal gas under the same conditions?
Answer:
It is less
Explanation:
At low temperatures and pressures, the volume of a real gas is generally smaller compared to the volume of an ideal gas under the same conditions.
This is due to the fact that real gases exhibit intermolecular interactions, such as attractive forces between the gas molecules. These interactions cause the gas particles to be closer together and occupy a smaller volume compared to an ideal gas, which assumes no intermolecular forces and occupies a larger volume.
At low temperatures, the kinetic energy of gas particles decreases, and the intermolecular forces become more significant. This leads to a reduction in the overall volume of the gas as the particles are more closely packed.
Therefore, at low temperatures and pressure, the volume of real gas is smaller than ideal gas.
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What is the mass(g) of 9.00 moles of water?
Hey There !:
Molar mass of H₂O = 18.01 g/mol
Therefore:
1 mol H₂O ----------------- 18.01 g/mol
9.00 moles ---------------- ( mass of H₂O )
mass of H₂O = 9.00 x 18.01 / 1
mass of H₂O = 162.09 / 1
mass of H₂O = 162.09 grams
I hope that it helps !
Which of the following cells is formed by meiosis?
A.a bacterial cell
B. A egg cell
C. A stem cell
D a brain cell
Answer:
it could be a B. egg cell or C. A stem cell but im pretty sure the answer is egg cell
hopes it helps!
The cell which is formed by the process of Meiosis is called as an egg cell. The correct option is B.
What is Meiosis?Meiosis is a type of cell division that produces four daughter cells, each with half the number of chromosomes as the original cell. This process is essential for sexual reproduction, where haploid gametes, such as egg and sperm cells, are produced. Meiosis is called as reductional division type of cell division.
Through the process of Meiosis, four daughter cells are formed which are not exactly same or identical to the parent cell.
Bacterial cells do not undergo meiosis as they reproduce asexually through binary fission. Stem cells and brain cells are also not formed by meiosis but by mitosis, a type of cell division that produces identical daughter cells with the same number of chromosomes as the original cell.
Therefore, the correct option is B.
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PLZ HELP ME
In two or more complete sentences explain how to balance the chemical equation,
Ca + N2 ⟶ Ca3 + N2 and include all steps.
The balanced reaction is 3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s ).
Explanation:
A chemical equation is said to be balanced when the total number of atoms present on the reactants side is equal to the total number of atoms present on the product side.
The unbalanced chemical equation is as follows,
Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
To balance this equation, you need to look at how many atoms of each element are present on each side of the chemical equation.
Calcium has 1 atom on the reactant and 3 on the products side. To balance the reaction we need to multiply the calcium atom by 3 on the reactants side.
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
Now Nitrogen has a coefficient of 2 on both sides of the reaction. Hence the balanced chemical equation will thus be
3 Ca ( s ) + N 2 ( g ) → Ca 3 N 2 ( s )
Frank has a sample of steel that weighs 80 grams. If the density of his sample of steel is 8 g/cm^3, what is the sample’s volume
Answer:
v = 10 cm³
Explanation:
Given data:
Mass of sample = 80 g
Density of sample = 8 g/cm³
Volume of sample = ?
Solution:
We will calculate the volume by rearranging the density formula,
Density:
Density is equal to the mass of substance divided by its volume.
Units:
SI unit of density is Kg/m3.
Other units are given below,
g/cm3, g/mL , kg/L
Formula:
d =m/v
d = density
m =mass
v = m/d
Now we will put the values in formula,
v = 80 g / 8 g/cm³
v = 10 cm³
What is the name of the covalent compound that consists of two atoms of silicon and six atoms of bromine? What is its chemical formula?
Answer: Disilicon hexabromide ( Si2Br6 )
Explanation: First name the prefix of the first element then the prefix of the second element and change bromine to -ide.
The chemical formula of the covalent compound with 2 silicon and 6 bromine atoms has been [tex]\rm \bold{Si_2Br_6}[/tex].
The chemical formula has been the representation of the chemical compound that has been consisting of the number of atoms of each element that are present in the compound.
The chemical formula has been written with the elemental symbol, having the number of atoms of each element in the subscript.
The given covalent compound has been consisted of:
2 Silicon atoms = [tex]\rm Si_2[/tex]
6 Bromine atoms = [tex]\rm Br_6[/tex]
The chemical formula of the compound has been = [tex]\rm Si_2Br_6[/tex].
The chemical formula of the covalent compound with 2 silicon and 6 bromine atoms has been [tex]\rm \bold{Si_2Br_6}[/tex].
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How do you distinguish a chemical change from a physical change
Answer:
One distinguishing feature between physical and chemical changes is that a physical change can be reverse or turn back to its original form, but chemical change cannot be return to its form because the material change.
Explanation:
PLEASE ANSWER
What do all forms of electromagnetic radiation have in common?
A. Their strength in the atmosphere
B. Their frequency
C. Their wavelength
D. Their speed in a vacuum
Answer:
D. Their speed
All forms of electromagnetic radiation, regardless of their differences in frequencies and wavelengths, share the common quality of having the same speed in a vacuum, which is approximately 3.00 x 10^8 meters per second.
Explanation:All forms of electromagnetic radiation, regardless of their different frequencies or wavelengths, share one common quality: their speed in a vacuum. When traveling through a vacuum, all electromagnetic waves move at the constant speed of about 299,792 kilometres per second (or equivalently, about 186,282 miles p/s), commonly approximated as 3.00 x 10^8 meters per second. This trait applies to all kinds of electromagnetic radiation, including visible light, X-rays, microwaves, and radio waves.
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How can crossing over lead to the expression Of new traits
Answer:
Crossing over, or recombination, is the exchange of chromosome segments between nonsister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.
Explanation:
What is Crossing over?
Crossing over, or recombination, is the exchange of chromosome segments between non-sister chromatids in meiosis. Crossing over creates new combinations of genes in the gametes that are not found in either parent, contributing to genetic diversity.How can crossing over lead to the expression of new traits?
During crossing over, part of one chromosome is exchanged with another. The result is a hybrid chromosome with a unique pattern of genetic material. Gametes gain the ability to be genetically different from their neighboring gametes after crossing over occurs.Due to crossing over, the genetic recombination, the offspring have a different set of alleles and genes than their parents do.Learn more:
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The total resistance in this circuit is
ohms.
The battery voltmeter should read
volts.
Explanation:
In the given figure we need to find the total resistance and total voltage .
We know that :
In series total R =R1 +R2 ...In parallel total R formula is : 1/R=1/R1 +1/R2.....We also know ohm's formula is : V=IRSo, in this circuit : R1=12 ohm
R2=8 ohm
R3=10 ohm
Ammeter reading = 10A
so, they are in series therefore ,
Total R = R1 + R2 +R3
R=12 +10+8=30 ohm
To find voltage we have : V=IR
V =10 x 30=300Volts
Answer:
The total resistance in this circuit is 30 ohms.
The battery voltmeter should read 300 volts.
Explanation:
I got it right. hope this helps !! :DD
Describe the electrochemical series and why it’s important in understanding metals.
Answer:
The electrochemical series is an arrangement of metals in such order that any metal in the list is displaced from its compounds by any metal above it, but displaces any metal below it. The higher up the list a metal is, the greater its activity. Knowing a metal’s placement on this chart can help you understand the activity of the metal, especially in regard to its ability to displace hydrogen in acids. Any items on the list far above hydrogen will do a good job at displacing it, those near it won’t do such a good job, and those below it won’t displace it from acids at all.
Explanation:
I got this answer straight from Penn foster.
Electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
Electrochemical series has been the arrangement of the metals in the order of decreasing order of the reactivity. The arrangement has been mediated in the metals arranged above are more reactive and able to displace the lower metals in the series.
The electrochemical series has been important for understanding metals as for the reaction, the compound formed and most reactive compound has been determined easily.
Thus, electrochemical series has been the arrangement of metals based on reactivity. It has been important in understanding the reactivity of metals.
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how many moles of aluminum atoms are in one aluminum can
How much heat is required change the temperature of 167 g of ice from -20.0 oC to -5.0 oC? (c= 2.093 J/goC for ice)
Answer: 5,242 J
Explanation:
Step by step:
The formula for this is Q=mcΔT
Find out your values and then plug-and-play.
Q= unknown (energy amt we need to find out)
m= 167g
c= 2.093 J/go°C
ΔT= -20.0° + 15° would give you -5.0°
Plug into the equation for Q=(167g)(2.093 J/g°C)(15°C).
Solve and you get 5,242 J.
hope this helps!!
The heat required to change the temperature of 167 g of ice from -20.0 °C to -5.0 °C is approximately 5246.2 Joules.
Explanation:To find the amount of heat required to change the temperature of an object, we use the formula:
q = mcΔT
where:
- q is the heat energy (in joules),
- m is the mass of the substance (in grams),
- c is the specific heat capacity of the substance (in J/g°C), and
- ΔT is the change in temperature (in °C).
Here, the mass of the ice (m) is 167 g, the specific heat capacity of ice (c) is 2.093 J/g°C, and the change in temperature (ΔT) is -5.0°C - (-20.0°C) = 15.0°C.
Substitute the values into the formula:
q = (167 g)(2.093 J/g°C)(15.0°C) = 5246.205 J
Therefore, the heat required is about 5246.2 Joules.
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Which factor MOST directly affects the flow of ocean currents?w of ocean currents?
The flow of ocean currents is most directly affected by winds, with the Coriolis Effect also playing a significant role. Other factors like seawater density, affected by temperature and salinity, as well as geographical features and the conservation of potential vorticity, also influence current patterns.
The factor that most directly affects the flow of ocean currents is the wind. Surface ocean currents are primarily driven by prevailing winds, which are influenced by global weather patterns and the Earth's rotation, an effect known as the Coriolis Effect. These currents are responsible for transporting heat from tropical regions towards higher latitudes and affect regional weather cycles.
Moreover, the density of seawater, determined by temperature and salinity, influences the movement of deep ocean currents, known as thermohaline circulation. Changes in the water's density, such as from melting ice caps and warming surface waters, can disrupt this circulation and impact climate and weather patterns globally, which is part of the larger Global Conveyor Belt system.
Another aspect is the geographical configuration of coastlines and the seafloor, which can lead to the creation of unique patterns such as gyres and eddies. These physical features can redirect the flow of currents and lead to the convergence or divergence of water masses.
Moreover, the vorticity of water, which is a measure of the local rotation at a certain point in the fluid, can influence ocean currents through mechanisms like the conservation of potential vorticity and the interplay with underwater landscapes.
Overall, while winds are the primary driver of surface currents, the interplay of multiple factors such as the Earth's rotation, temperature, salinity, geological features, and vorticity all contribute to the complex flow patterns of ocean currents.
The correct answer is B differences in temperature is the factor that MOST directly affects the flow of ocean currents.
The temperature variations are the most fundamental factor that sets the ocean in motion, creating density differences and driving the circulation patterns that we see as ocean currents.
The other option is incorrect:
Option A is wrong because Differences in pressure: While pressure differences can influence currents, they are often a result of temperature variations.
Option C is wrong because Earth's revolution round the Sun: Earth's revolution does have some influence on tides and ocean movements, but its effect on overall current flow is less direct.
Option D is wrong because The Moon's revolution round Earth: the Moon's gravity plays a major role in tides, but its influence on overall current flow is less significant compared to temperature variations.
The complete question is
Which factor MOST directly affects the flow of ocean currents?
A) differences in pressure
B) differences in temperature
C) Earth's revolution round the Sun
D) The Moon's revolution round Earth