A gas at 850. mmhg occupies 1.5 l. the temperature is raised from 15 °c to 35 °c causing the volume to change to 2.5 l. what is the final pressure of the gas?
Answers
The final pressure of the gas is 1,430 mmHg.
Using the combined gas law, we can relate the initial pressure, volume, and temperature to the final pressure and volume:
(P₁V₁)/T₁ = (P₂V₂)/T₂
where P₁, V₁, and T₁ are the initial pressure, volume, and temperature, and P₂ and V₂ are the final pressure and volume.
Plugging in the given values, we get:
(850 mmHg x 1.5 L)/288 K = (P₂ x 2.5 L)/308 K
Solving for P₂, we get:
P₂ = (850 mmHg x 1.5 L x 308 K)/(2.5 L x 288 K) = 1430 mmHg
Therefore, 1,430 mmHg is the final pressure of the gas.
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Related Questions
Gold and Platinum are found in free state in nature-Give reason.
Answers
The photo on the left shows an alligator hiding in swamp water. The photo on the right shows an alligator with a mutation for white skin. What kind of effect is the mutation most likely to have on the alligator?
A. Neutral, because it will have an easier time staying warm
B. Harmful, because it will have a harder time staying clean
C. Harmful, because it will have a harder time sneaking up on its prey
D. Beneficial, because it will have an easier time finding a mate
Answers
Answer: C. Harmful, because it will have a harder time sneaking up on its prey
Explanation: White skin on an alligator would be detrimental because it would not be able to blend in to its surroundings as well, as the white skin would stand out from the greens and browns of the swamps in which alligators normally inhabit. Most alligators also live in warmer climates, so there would not be much opportunity to try and blend into any sort of snow.
Answer:
c
Explanation:
Question 5
What causes cosmic microwave background energy?
O vacuums created by black holes
O energy released by dying stars
O cooling as the universe expands
O soundwaves from the Big Bang
Answers
It is believed that the process of cooling as the universe expands is the leading cause of cosmic microwave background energy.
What is cosmic microwave background energy?Cosmic microwave background energy is a type of cosmic energy associated with radiation during the formation of the Universe.
This type of energy (cosmic microwave background energy) is related to the cooling and expansion of the Universe.
In conclusion, it is believed that the process of cooling as the universe expands is the leading cause of cosmic microwave background energy.
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Answer:
soundwaves from the Big Bang
Explanation:
hope this work :)
Li + H2O + LiOH + H2
How do I balance this?
Answers
Answer:
2Li + 2H2O → 2LiOH + H2
Explanation:
Lithium + Water = Lithium Hydroxide + Dihydrogen
Suppose 1.76 g of potassium bromide is dissolved in 350 mL of a 74.0 mM aqueous solution of silver nitrate. Calculate the final molarity of bromide anion in the solution. You can assume the volume of the solution doesn't change when the potassium bromide is dissolved in it.
Answers
The final molarity is 74.03 mM.
What is molarity?
Molar concentration, also known as molarity, amount concentration, or substance concentration, is a unit used to describe the amount of a substance in a solution expressed as a percentage of its volume. The number of moles per litre, denoted by the unit symbol mol/L as well as mol/dm3 in SI units, is the most widely used unit for molarity in chemistry. One mol/L of a solution's concentration is referred to as one molar, or 1 M.
Molar mass of KBr = 119.00 g/mol
Mass of KBr = 1.76 g
Moles of KBr = 1.76 g / 119.00 g/mol = 0.0148 mol
Initial molarity of AgNO3 = 74.0 mM
Molarity of AgNO3 = 74.0 mM = 74.0 mol/L
Volume of AgNO3 = 350 mL = 0.35 L
Moles of AgNO3 = 74.0 mol/L x 0.35 L = 25.9 mol
Total moles in solution = 0.0148 mol KBr + 25.9 mol AgNO3 = 25.91 mol
Total volume of solution = 0.35 L
Final molarity of KBr = 25.91 mol KBr / 0.35 L = 74.03 mM
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(subject is astronomy)
Part B When writing a science paper, you need several different sources of information. These sources can be books or websites. Remember to use the most credible sources. Some websites present things as evidence that may not have a scientific base. You must be able to identify reliable sites so the data in your presentation is credible. Sources that end in .edu (school and college websites) and .gov (government websites such as NASA.gov) are the most trustworthy. However, sometimes students, not scientists, write content for .edu websites. Because the content may not have been checked by scientists, read any .edu website carefully to determine whether it is reliable. Some .org and .com sites, such as Smithsonian.com, are also credible, but you have to read the content carefully to determine how legitimate it is. When you review a source, ask yourself these questions about the website’s author, content, and sources: Who authored the article? Is the author a scientific expert in stars and galaxies? What is the purpose of the article? Does the article state facts that can be proven by evidence, or is it made up of opinions? When was the article written? Do other credible sources support the statements in this article? Which scientific studies support the information in the article? Find two to three credible websites that you can use to find information for your paper. Write them down. They can be e-books, magazines, websites, and so on. Also, write down one to two sentences for each source explaining how the source will help you. Show how you will cite your sources at the end of your presentation using MLA (Modern Language Association) citation methods.
Answers
In the liberal arts and humanities, MLA (Modern Language Association) style is most frequently used to compose papers and cite sources.
Thus, Brief parenthetical citations in the text that are keyed to an alphabetical list of the works cited at the end of the work are a feature of the MLA style.
With the publication of the most recent edition, the MLA citation style has undergone substantial alterations.
Building trust in the knowledge and ideas we share with one another may be more crucial than ever, and for almost a century, this has been the guiding principle of MLA style, a set of writing and documentation.
Thus, In the liberal arts and humanities, MLA (Modern Language Association) style is most frequently used to compose papers and cite sources.
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What is a possible reason that ecosystem 2 has fewer species than ecosystem 1?
Answers
it doesn't repopulate as fast because ecosystem 2 could have more trouble reproducing then ecosystem 1.
convert 25 celsius to the kelvin scale
Answers
Answer:
298.15 Kelvin.
Explanation:
To convert Celsius to Kelvin, you need to add 273.15 to the Celsius temperature.
So, to convert 25 degrees Celsius to the Kelvin scale:
Kelvin = Celsius + 273.15
Kelvin = 25 + 273.15
Kelvin = 298.15
Therefore, 25 degrees Celsius is equivalent to 298.15 Kelvin.
Make sure to always add 273 to get Kelvin:)
write the balanced net reaction for a sn (s) | sncl2 (aq) || albr3 (aq) | al (s) chemical cell. what is the cell potential if the concentration of al3 is 53.7 mm and the concentration of sn2
Answers
The balanced net reaction for the Sn (s) | SnCl2 (aq) || AlBr3 (aq) | Al (s) chemical cell is: 3Sn (s) + 2AlBr3 (aq) → 3SnBr2 (aq) + 2Al (s).
The given cell notation represents a redox reaction occurring in an electrochemical cell. The left half-cell consists of solid tin (Sn) in contact with an aqueous solution of tin(II) chloride (SnCl2). The right half-cell contains an aqueous solution of aluminum(III) bromide (AlBr3) and solid aluminum (Al).
To determine the balanced net reaction, we need to consider the transfer of electrons between the species involved. The oxidation half-reaction occurs at the anode, where tin (Sn) undergoes oxidation and loses electrons:
Sn (s) → Sn2+ (aq) + 2e-
The reduction half-reaction takes place at the cathode, where aluminum(III) bromide (AlBr3) is reduced and gains electrons:
2Al3+ (aq) + 6Br- (aq) → 2Al (s) + 3Br2 (aq) + 6e-
To balance the overall reaction, we need to multiply the oxidation half-reaction by 3 and the reduction half-reaction by 2 to ensure that the number of electrons transferred is equal:
3Sn (s) → 3Sn2+ (aq) + 6e-
4Al3+ (aq) + 12Br- (aq) → 4Al (s) + 6Br2 (aq) + 12e-
By adding the balanced half-reactions together, we obtain the balanced net reaction for the cell:
3Sn (s) + 2AlBr3 (aq) → 3SnBr2 (aq) + 2Al (s)
To determine the cell potential, additional information such as the standard reduction potentials of the species and the Nernst equation would be required. Without this information, it is not possible to calculate the cell potential accurately.
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Give one example of each of the following, that happens to us in our everyday life: Explain a bit about the science behind it, so for example, for melting you can say ice cream melting in your hand, which turns from a solid to a liquid, which is melting. If you are unsure please do not answer, though if you are confident please be free to do so! Have a wonderful day or night!
a) Melting:
b) Freezing:
c) Condensation:
d) Evaporation:
e) Sublimation.
Answers
Answer:
a) Melting: An example of melting in everyday life is when an ice cube placed on a warm surface starts to melt and turns into liquid water. Melting is the process in which a solid substance absorbs enough heat energy to transition into a liquid state. The heat energy breaks the bonds holding the particles of the solid together, causing them to gain enough kinetic energy to move more freely and transition to a liquid form.
b) Freezing: Freezing can be observed when water is placed in a freezer and transforms into ice. Freezing is the reverse process of melting. It occurs when a liquid substance loses heat energy and its particles slow down, leading to the formation of a solid structure. The decrease in temperature causes the particles to arrange themselves into an organized pattern, creating a solid state.
c) Condensation: When you see water droplets forming on the surface of a cold beverage on a hot day, that is an example of condensation. Condensation is the process by which a gas or vapor cools down and transforms into a liquid state. It happens when the temperature of the gas or vapor reaches a point where its particles lose enough energy to come together and form liquid droplets.
d) Evaporation: When wet clothes or a puddle of water dries up after exposure to sunlight or air, it is an example of evaporation. Evaporation is the process by which a liquid substance, such as water, turns into a gas or vapor. It occurs when the particles near the surface of the liquid gain enough energy from the surroundings to break free from the liquid phase and enter the gaseous phase.
e) Sublimation: An example of sublimation is the direct conversion of solid dry ice (frozen carbon dioxide) into a gas without passing through a liquid phase. Sublimation is the process in which a solid substance transforms directly into a gas without going through the intermediate liquid phase. It occurs when the substance absorbs enough heat energy to break the bonds between its particles, causing them to transition from a solid state to a gaseous state.
Explanation:
What are the benefits and limitations of using models to study the real world?
Answers
Answer:
Explanation:
Benefits of using models and limitations include being able to explain or analyze concepts, represent things too small or large, explain the past or present, and predict the future.
Determine the number of atoms of 25 g iron(II) chloride
Answers
Answer:
3.56x10²³ atoms
Explanation:
To solve this question we need first to determine the moles of iron (II) chloride, FeCl₂, using its molar mass. Then, using Avogadro's number we can solve for the number of atoms:
Moles FeCl₂ - Molar mass: 126.751g/mol-
25g FeCl₂ * (1mol / 126.751g) = 0.1972 moles
Number of atoms:
1 mole of FeCl₂ are 6.022x10²³ molecules of FeCl₂, that means 0.1972moles are:
0.1972mol * (6.022x10²³ molecules / 1mol) = 1.188x10²³ molecules of FeCl₂
In 1 molecule of FeCl₂ there are 3 atoms (1 of Fe and 2 of Cl), in 1.188x10²³ molecules of FeCl₂ there are:
1.188x10²³ molecules of FeCl₂ * (3atoms / molecule) =
3.56x10²³ atomsPitting corrosion in a tight joint of two similar metals in an electrolyte is an example of?
Answers
Hope this helps :))
Which element makes up most of the air we breathe.
Answers
Identify each chemical reaction as endothermic or exothermic based on its description.
Answers
Answer:
Exothermic.
Explanation:
So if the sum of the enthalpies of the reactants is greater than the products, the reaction will be exothermic.
An office worker at the Universal Space Agency returned from lunch to find someone left him a gift—a cold can of soda to drink! But when the office worker picked up the can, he realized it was wet. The can was covered in a thin layer of liquid. Some of the liquid was slowly dripping onto his desk. What kind of liquid is on the officer worker’s soda can, and how did the liquid get onto the surface of the can?
Using evidence from the articles you have read as well as the Sim and other activities you have completed in this lesson, write down your initial ideas about why this mystery occurred. Be ready to share your ideas.
Answers
The liquid on the soda can is likely condensation, which is caused by the sudden change in temperature between the cold can and the warmer room. This condensation then drips onto the desk, making the can wet.
The office worker likely left the can in a warm area after lunch, which caused the condensation to form. My initial idea is that the liquid on the soda can is condensation, which could have happened due to the can having been left in a warm environment. Since the office worker found the can of soda, it is likely that the can had been left in the office for a while and the warm temperature caused the liquid to form on the can’s surface.
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how doi find half years
Answers
which best describes elements found in a column of the periodic table? group of answer choices the elements are all found naturally in the same physical state. the elements have similar chemical properties. the elements have the same atomic number. the elements have the same-size atoms.
Answers
The best description of elements found in a column of the periodic table is that they have similar chemical properties. The elements in a column or group of the periodic table share the same number of valence electrons, which are responsible for the chemical behavior of the element.
This similarity in electron configuration leads to similar chemical properties, such as reactivity, electronegativity, and ionization energy. However, the elements in a column do not necessarily have the same atomic number or the same size atoms. In fact, the atomic size tends to increase as you go down a column due to the addition of more electron shells. Therefore, it is the similar electron configuration and resulting chemical behavior that define the elements in a column of the periodic table.
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Scurvy was a serious disease that 18th-century sailors often came down with on their long-distance voyages overseas. The cause of scurvy was not known at the time, and the cure was not always accepted.
A famous British explorer named James Cook decided to put his crew on a strict diet plan that he hoped might prevent his sailors from getting the illness. One food Captain Cook required his sailors to eat was sauerkraut. Interestingly, none of his sailors ever died from scurvy.
Today, we know that scurvy is caused by a lack of vitamin C. Although Captain Cook did not realize that sauerkraut had this important nutrient, his plan helped keep his sailors healthy. (5 points)
a. Who was the scientist in the above story? (1 point)
b. What "experiment" did he do? (1 point)
c. What "chemicals" were used in his experiment? (1 point)
d. How did this "scientist" use his knowledge to serve others? (1 point)
e. What does this story tell you about where chemicals can be found and who can be a scientist? (1 point)
Answers
a. The scientist in the above story is James Cook, the famous British explorer.
b. The "experiment" that James Cook conducted was putting his crew on a strict diet plan that included sauerkraut.
c. The "chemical" used in his experiment was vitamin C, although it was not known at the time.
d. James Cook used his knowledge and observations to serve others by implementing a diet plan that helped prevent scurvy among his sailors.
e. This story highlights that scientific discoveries can be made even without a complete understanding of the underlying chemistry.
a. The scientist in the above story is James Cook, the famous British explorer.
b. The "experiment" that James Cook conducted was putting his crew on a strict diet plan that included sauerkraut.
c. The "chemical" used in his experiment was vitamin C, although it was not known at the time.
d. James Cook used his knowledge and observations to serve others by implementing a diet plan that helped prevent scurvy among his sailors. By requiring his crew to eat sauerkraut, which happened to contain vitamin C, he unknowingly provided them with the necessary nutrient to stay healthy and avoid the illness.
e. This story highlights that scientific discoveries can be made even without a complete understanding of the underlying chemistry. James Cook's use of sauerkraut as a preventive measure against scurvy demonstrates that valuable knowledge and effective solutions can come from observation, experimentation, and practical applications. It also emphasizes that anyone can contribute to scientific advancements, as Cook, an explorer rather than a trained scientist, made a significant impact on the health of his crew through his innovative approach. This story shows that chemicals, in this case, vitamin C, can be found in natural sources, and scientific discoveries can be made by individuals from various backgrounds and professions.
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CO2
NaCl
HCl
These may all be classified as
A) elements and compounds.
B) elements and molecules.
C) elements and pure substances.
D) compounds and pure substances.
Answers
Answer:
a element and compounds
Answer:
The answer is D) compounds and pure substances.
Explanation:
Here's why: All three items are examples of compounds and pure substances. They are not pure elements or molecules.
for a weak acid (e.g., ch3cooh) that is titrated with a strong base (e.g., naoh), what species (ions/molecules) are present in the solution at the stoichiometric point?
Answers
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What is the mass of a 49 cm3 object with a density of 63 g/cm3?
Answers
The mass of an object is a measure of the total amount of matter present in it. Mass is usually measured in grams (g) or kilograms (kg).The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.
The given data is;
volume = 49 cm³,
density = 63 g/cm³.
Now, we have to calculate the mass of the object.
Density = mass / volume
Mass = density × volume
Substitute the given values in the above equation.
Mass = 63 × 49
Mass = 3087 g or 3.087 kg
The mass of the object is 3087 g or 3.087 kg.
The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg. It means the mass of the object is 3087 times its volume.
The mass of the object with a volume of 49 cm³ and density of 63 g/cm³ is 3087 g or 3.087 kg.
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The melting point X of a certain specimen be assumed to be a continuous random variable which is uniformly distributed over the interval [110, 120]. Find density function of X, mean of X, variance of X and P (112 x < 115.).
Answers
Density function: f(x) = 1/10, for 110 ≤ x ≤ 120, and f(x) = 0 otherwise.
Mean: μ = 115.
Variance: σ^2 = 25/3.
Probability: P(112 < X < 115) = 0.3.
Given that the melting point X is uniformly distributed over the interval [110, 120], we can find the density function, mean, variance, and probability as follows:
1. Density function:
Since X is uniformly distributed, the density function f(x) is constant within the interval [110, 120] and zero outside that interval. To find the density function, we need to determine the height of the constant density.
The total length of the interval is 120 - 110 = 10.
Since the density function is constant, the area under the density function curve must be equal to 1.
Therefore, the height of the constant density is 1 divided by the length of the interval: f(x) = 1/10, for 110 ≤ x ≤ 120, and f(x) = 0 otherwise.
2. Mean:
The mean (μ) of a uniform distribution is the average of the endpoints of the interval. In this case, the mean is (110 + 120) / 2 = 115.
3. Variance:
The variance (σ^2) of a uniform distribution is calculated using the formula: σ^2 = (b - a)^2 / 12, where a and b are the endpoints of the interval. In this case, the variance is (120 - 110)^2 / 12 = 10^2 / 12 = 100/12 = 25/3.
4. Probability:
To find P(112 < X < 115), we need to calculate the area under the density function curve between the points 112 and 115.
Since the density function is constant within the interval [110, 120], the probability is equal to the ratio of the length of the interval [112, 115] to the length of the entire interval [110, 120].
The length of the interval [112, 115] is 115 - 112 = 3.
The length of the entire interval [110, 120] is 120 - 110 = 10.
Therefore, P(112 < X < 115) = (3 / 10) = 0.3.
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The magnetic field is stronger away from the magnet true or false
Answers
Answer:
Big False
Explanation:
As the magnets get closer, the stronger the magnetic field. The farther away, the less strength the field exhibits.
Help please!
Read the scenario and decide whether the observations are qualitative and/or quantitative.
Danielle and Heather were in science class when they volunteered to fill the fish tank in the back of the room using a long hose connected to the sink. Mr. Ferris told them to fill the tank almost to the top and to be sure not to overflow the tank. The girls wanted to know how much water the tank could hold, so they recorded the length, width and height of the tank in centimeters. Next, they determined the total volume of the tank using the formula, length x width x height.
Answers
The observation, in this case, is quantitative.
Quantitative observationQuantitative observations are observations that can be recorded based on quantitative data. In other words, they are observations that can be assigned numerical values.
Quantitative observations are as opposed to qualitative observations because the former cannot be assigned numerical values. They can be ranked or qualified.
In this case, Danielle and Heather could assign numbers to the length, width, and height of the tank in order to calculate its volume.
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If you had a mixture of butyric acid and hexane, how would you separate the two compounds?.
Answers
Answer:
First of all take separatory funnel.
Add the mixture of compounds into it.
Pour Water into it.
Add NaOH base. This will result in following reaction.
CH₃CH₂CH₂COOH + NaOH → CH₃CH₂CH₂COONa + H₂O
The resulting salt (CH₃CH₂CH₂COONa) is is soluble in water.
The water is the bottom layer (more density) and contains sodium butyrate.
Pour out the water from separatory funnel.
The organic layer (hexane) is left behind.
Now, take the aquous layer and neutralize it using HCl.
Once, neutralized remove the water.
NEED ANSWER ASP PLEASE I NEED THE ANSWER NOW
Answers
Answer:
1)True
2)True
3)False
4)False
Explanation:
I tried and I hope u pass
suppose you perform a titration of an unknown weak acid solution. you start with 4.00 ml of the weak acid and find that it takes 14.3 ml of 0.0500 m naoh to reach the equivalence point. what is the concentration of the unknown weak acid solution? enter your answer to three significant figures in units of m.
Answers
The concentration of the unknown weak acid solution is 0.220 M
Equivalent point:
Since the volume is 4.00 mL of the weak acid, it takes 17.6 mL of 0.0500 M NaOH to reach the equivalence point.
We know that
In the equivalence point, [H⁺] = [OH⁻].
here the given formula C₁V₁=C₂V₂ is used
C₁ = 0.0500 M
V₁ = 17.6 mL
C₂ = ?
V₂ = 4.00 mL
So, the C₂ is
0.0500 M * 17.6 mL = C₂ * 4.00 mL
C₂ = 0.220 M
Hence, The concentration of the unknown weak acid solution is 0.220 M.
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Titration is the slow addition of a known concentration solution (called a titrant) to a known volume of an unknown concentration solution until the reaction reaches neutralization, which is often indicated by a color change.
concentration of the unknown weak acid solution is 0.178 M
What is titration and its purpose?Ticoncentration tration is the slow addition of a known concentration solution (called a titrant) to a known volume of an unknown concentration solution until the reaction reaches neutralization, which is often indicated by a color change.The titration's goal is to find the equivalence point, or the point at which chemically equivalent amounts of the reactants have been mixed. The amount of reactants mixed at the equivalence point is determined by the stoichiometry of the reaction.Titration is a common quantitative chemical analysis laboratory method for determining the concentration of an identified analyte. The titrant or titrator is a reagent that is prepared as a standard solution of known concentration and volume.In the equivalence point, [H⁺] = [OH⁻].
This means C₁V₁=C₂V₂
Where
C₁ = 0.0500 M
V₁ = 14.3 mL
C₂ = ?
V₂ = 4.00 mL
So we compute the given data in the formula to calculate C₂:
0.0500 M * 14.3 mL = C₂ * 4.00 mL
C₂ = 0.178 M
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Which are properties of ideal gases? Select all that apply.
Ideal gas particles exert attractive or repulsive forces on each other.
Ideal gas particles travel in straight lines.
Ideal gas particles have no size.
Ideal gas particles travel in curved lines.
----------------------------------------------------------
Which type of real gas would behave the most ideally?
A) a gas consisting of large, nonpolar molecules
B) a gas consisting of small, polar molecules
C) a gas consisting of large, polar molecules
D) a gas consisting of small, nonpolar molecules
Answers
Perfect gas particles move in straight lines and have no size, among other characteristics. The right answer is D) a gas made up of tiny, nonpolar molecules.
What characteristics do ideal gases have?The gas particle's volume is quite small. There are no intermolecular forces between the gas particles, which are all the same size. Newton's Laws of Motion are consistent with the random motion of the gas particles. Perfect elastic collisions occur between gas particle without any energy being lost.
What are the characteristics of ideal and real gases?The particles of a real gas have limited volumes and are attracted to one another, whereas the particles of an ideal gas are considered to have no volume and no interparticle attraction.
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Melting gold with other metals makes 10 karat gold. Which term best describes 10 karat gold
Answers
The 10 karat of gold formed by melting gold with other metals is described as homogeneous mixture.
A pure substance is a substance that is made up of only one kind of particle. This type of substance consist of only one element.
A heterogeneous substance is a type of substance that is made up two or more substances existing in different phases.
A homogeneous substance is a type of substance that is made up of two or more substances evenly mixed. This type of substance exist only in one phase.
Thus, the 10 karat of gold formed by melting gold with other metals is described as homogeneous mixture.
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Answer:
homogeneous mixture
Explanation: