a balloon contains 3.4 liters of nitrogen gas at a temperature of 82 kk and a pressure of 101 kpakpa. T/F ?
Answers
The given statement "a balloon contains 3.4 liters of nitrogen gas at a temperature of 82 kk and a pressure of 101 kappas. " is False.
The given temperature of 82 K is well below the boiling point of nitrogen. This implies that the nitrogen gas would have already liquefied at this temperature and would not exist as a gas in the balloon.
Therefore, it is unlikely that the balloon contains 3.4 liters of nitrogen gas at a temperature of 82 K and a pressure of 101 kPa.
If the temperature and pressure conditions were changed to be within the gas phase region for nitrogen, then the statement may be true. However, as it stands, the statement is not valid.
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Related Questions
Compare the density values for the solid in part II. The actual density of our solid is 8.9 g/mL. Are the densities of the solid precise and accurate? Explain your answer.
[Answer on your own using the previous question as a guide.]
Part II: Density of Irregular-Shaped Solid – record volume with 1 place after the decimal
Mass of solid (g) [4]
38.951
43.830
41.418
Volume of water (mL) [5]
52.0
51.2
52.4
Volume of water and solid (mL) [6]
56.5
56.1
57.1
Answers
The values are not precise but they are accurate because they are all close to the true value of 8.9 g/mL.
What is the density?The density of a solid refers to the ratio of the mass to the volume of the object. This ratio is an intrinsic property because we could use it to identify a substance. In this case, the density of a substance can tell us exactly what the substance is.
Now let us try to obtain the density of the object in each case;
Case 1 = 38.951/56.5 - 52.0 = 8.7 g/mL
Case 2 = 43.830/56.1 - 51.2 = 9.1 g/mL
Case 3 = 41.418/ 57.1 - 52.4 = 8.8 g/mL
It is clear that the values are not precise but they are accurate because they are all close to the true value of 8.9 g/mL.
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What is the total energy required to break all the bonds in 1 mol propanol,
C3H8O?
Answers
Answer:
The total energy to break all the bonds in 1 mole of 1-propanol, C₃H₈O, is 4411 kJ/mol
Explanation:
We note that propanol, C₃H₈O is also known as 1-propanol is written as follows;
CH₃CH₂CH₂OH which gives
CH₃-CH₂-CH₂-OH
Hence, the total number of bonds are;
C-H Bonds = 3 + 2 + 2 = 7
C-O Bonds = 1
O-H Bond = 1
C-C Bonds = 2
The bond energies are as follows;
C-H Bonds = 413 kJ/mol
C-O Bonds = 358 kJ/mol
O-H Bond = 468 kJ/mol
C-C Bonds = 347 kJ/mol
Energy required to break the bonds in 1-propanol is therefore;
C-H Bonds = 413 kJ/mol × 7 = 2,891 kJ/mol
C-O Bonds = 358 kJ/mol × 1 = 358 kJ/mol
O-H Bond = 468 kJ/mol × 1 = 468 kJ/mol
C-C Bonds = 347 kJ/mol × 2 = 694 kJ/mol
The total energy to break all the bonds in 1 mole of 1-propanol = 4411 kJ/mol.
Imagine the movement of gas particles in a closed container. According to the kinetic molecular theory, which statements below are true of the gas particles? Check all that apply. Gas particles act like tiny, solid spheres. Gas particles are in constant, random motion. Gas particles at lower temperatures move faster. Collisions are elastic, there is no energy lost as the particle hits the sides of the container. Slower moving particles collide more often and with more force with the container.
Answers
Answer:
The answers are:
1. Gas particles act like tiny, solid spheres.
2. Gas particles are in constant, random motion.
4. Collisions are elastic, there is no energy lost as the particle hits the sides of the container.
Hope this helps!
According to the Kinetic Molecular Theory, the statements that are true of the gas particles are:
Gas particles act like tiny, solid spheres.Gas particles are in constant, random motion.Collisions are elastic, there is no energy lost as the particle hits the sides of the container.What is the Kinetic Molecular Theory?The Kinetic Molecular Theory actually states that the particles of gas are in motion constantly and their collisions are perfectly elastic.
This theory is actually used to give explanations for Boyle's and Charles' laws.
According to the Kinetic Molecular Theory, the collisions of the gas are elastic and are in constant motion.
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HELP ME PLEASE 100 POINTS!!!!!!!!!
Record the weight showing on the scales by clicking on the Report button below.
How many foot-pounds of work were done?
Force (weight from scale reading in above question) times the distance (1 foot) = work done.
Type your foot-pounds answer in your Report document.
2. Place the box on a smooth surface.
Pull the box 1 foot across a smooth desk or table.
Record the weight showing on the scales.
A. How many foot-pounds of work were done?
(Force [weight from scale reading] times the distance [1 foot] = work done.)
Type your foot-pounds answer in your Report document.
B. What is the difference between the amount of foot-pounds required to lift the box and to pull the box?
Record this difference.
C. Why is there a difference between lifting an object and pulling it across a surface?
Clue: What force are you working against when you lift the object?
3. Find another object to lift and pull with the spring scale. Write the difference in foot-pounds between lifting and pulling.
a. lifting
b. pulling
c. difference
d. Write your conclusions from both experiments in your own words.
Answers
Answer:
the answer is c
Explanation:
i took the test
A chemist dissolves 0.9 g of an unknown monoprotic (one acidic H) acid in water. She finds that 14.6 mL of 0.426 M NaOH are required to neutralize the acid.
Answers
Answer:
144.7 g/mol would be the molar mass of the monoprotic acid
Explanation:
We can find the molar mass of the monoprotic acid from the data showed in the excersie. As every titration we can say that:
mEq acid = mEq base
mEq acid = 14.6 mL . 0.426 M
mEq acid = 6.2196 mEq
mEq = Volume (mL) . N = mass (g) / (EQ / 1000), where the EQ is the:
Molar weight / valence. For this case, as the acid is a monoprotic one, we assume Molar Weight = EQ
6.2196 mEq = 0.9 g / (EQ / 1000)
6.2196 mEq . EQ/1000 = 0.9 g
EQ = 0.9 g / 6.2196×10⁻³ = 144.7 g/mol
A student put a bottle of water and a can of sugared soda in the freezer to chill them quickly. when she took them out, the bottle of water was frozen but the can of soda was not. explain why this happened.
Answers
The soda water didn't freeze because of the depression in freezing point as compared to the water.
What is Freezing Point Depression ?When a solute is added to a pure solvent , then the value of freezing point is reduced.
The decrease in the freezing point is directly proportional to the molality of the solute.
It is given in the question that
A student put a bottle of water and a can of sugared soda in the freezer to chill them quickly.
when she took them out, the bottle of water was frozen but the can of soda was not.
It is because water is the pure solvent , so freezing point is fixed but the soda water has sugar and Carbon Di oxide along with the solvent water , the presence of the sugar and Carbon -di-oxide decreases the freezing point of the soda water and so it doesn't freezes.
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A solution can only br made from the same amounts of solute and solvent
Answers
The statement that a solution can only be made from the same amounts of solute and solvent is not entirely accurate. While it is true that certain solutions may require a specific ratio of solute to solvent for optimal results, the concentration of a solution can vary depending on the desired outcome.
For example, a dilute solution may contain a small amount of solute relative to the amount of solvent, whereas a concentrated solution may contain a larger amount of solute in the same amount of solvent.
Additionally, the solubility of a solute can also affect the amount of solute needed to form a solution. Some solutes may have a higher solubility in a given solvent than others, meaning that less of that solute is needed to create a saturated solution.
Overall, while a certain amount of solute and solvent may be needed to form a solution, the concentration and solubility of the solute can vary and ultimately affect the amount needed to create a specific solution.
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what is the importance of polar covalent and hydrogen bonds in the structure of water?
Answers
Answer:
Water is a remarkable substance, and its unique properties are largely due to the presence of polar covalent bonds and hydrogen bonds in its structure. These characteristics play a crucial role in the physical and chemical properties of water, making it essential for life as we know it.
Explanation:
The polar covalent bonds in water arise from the unequal sharing of electrons between oxygen and hydrogen atoms. This results in the oxygen atom having a partial negative charge (δ-) and the hydrogen atoms having partial positive charges (δ+). These charges create polarity within the water molecule, leading to the formation of hydrogen bonds.
Hydrogen bonds occur when the partially positive hydrogen atom of one water molecule is attracted to the partially negative oxygen atom of another water molecule. These hydrogen bonds are relatively weak individually, but when present in large numbers, they contribute to the cohesion, surface tension, and high boiling point of water.
The importance of these bonds is manifold. The cohesion between water molecules due to hydrogen bonding enables water to form droplets, have a high surface tension, and flow freely, facilitating transport within organisms and in the environment. Additionally, hydrogen bonding leads to the high specific heat capacity and heat of vaporization of water, making it an effective regulator of temperature in living organisms and ensuring stable environmental conditions.
Furthermore, hydrogen bonds play a crucial role in the unique properties of water as a solvent. The polar nature of water allows it to dissolve a wide range of substances, including ionic compounds and polar molecules, facilitating various biological processes such as nutrient transport and chemical reactions in cells.
humans are more like animals such as rabbits than plants because ?
Answers
Answer:
because we aren't made of gas and it seems we have a common ancestor to all animals some more than others
Explanation:
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if 30 ml of 5.0 x 10-4 m ca(no3)2 are added to 70 ml of 2.0 x 10-4 m naf, will a precipitate form? ksp for caf2 is 4.0 x 10-11.
Answers
Yes, a precipitate of calcium fluoride (CaF2) will form if 30 ml of 5.0 x 10-4 m ca(no3)2 are added to 70 ml of 2.0 x 10-4 m naf.
To determine if a precipitate will form when the two solutions are mixed, we need to compare the ion product (IP) with the solubility product (Ksp) of calcium fluoride (CaF2).
The ion product (IP) is calculated by multiplying the concentrations of the ions involved. In this case, the ions involved are Ca2+ and F-.
[Ca2+] = 5.0 x 10^-4 M (concentration of Ca2+)
[F-] = 2.0 x 10^-4 M (concentration of F-)
IP = [Ca2+][F-] = (5.0 x 10^-4 M)(2.0 x 10^-4 M) = 1.0 x 10^-7
Comparing the ion product (IP) with the solubility product (Ksp), we find:
IP (1.0 x 10^-7) > Ksp (4.0 x 10^-11)
Since the ion product exceeds the solubility product, it indicates that the concentration of the product ions (Ca2+ and F-) exceeds the maximum solubility of calcium fluoride (CaF2). Therefore, a precipitate of calcium fluoride will form when the solutions are mixed.
When 30 ml of 5.0 x 10^-4 M Ca(NO3)2 solution is added to 70 ml of 2.0 x 10^-4 M NaF solution, a precipitate of calcium fluoride (CaF2) will form due to the concentration of the product ions exceeding the solubility product.
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A balloon with a volume of 5.0 L is filled with a gas at 760 torr. If the pressure is reduced to 380 torr without a change in temperature, what will be the volume of the balloon?
Answers
Answer:
10 LExplanation:
The new volume can be found by using the formula for Boyle's law which is
\(P_1V_1 = P_2V_2\)
Since we are finding the new volume
\(V_2 = \frac{P_1V_1}{P_2} \\\)
From the question we have
\(V_2 = \frac{5 \times 760}{380} = \frac{3800}{380} = \frac{380}{38} \\ \)
We have the final answer as
10 LHope this helps you
By applying Boyle's law, the final volume of this balloon is equal to 10,000 mL.
Given the following data:
Initial volume = 5.0 L.
Final pressure = 380 torr.
Initial pressure = 760 torr.
How to calculate the final volume?In order to determine the final volume of this balloon, we would apply Boyle's law.
Mathematically, Boyle's law is given by this formula:
PV = k
P₁V₁ = P₂V₂
Where:
P represents the pressure.V represents the volume.Making V₂ the subject of formula, we have:
V₂ = (P₁V₁)/P₂
Substituting the given parameters into the formula, we have;
V₂ = (760 × 5.0)/380
V₂ = 3800/380
V₂ = 10 L
In milliliters, we have:
1 L = 1000 mL
10 L = X mL
X = 1000 × 10
V₂ = 10,000 mL.
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The heart is a large
________________
that pumps the blood
throughout the body.
Answers
What is the percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺? report your answer to two decimal places.
Answers
The percent of chloride ion in a sample if 2. 500 g of the sample produces 1. 750 g of agcl when treated with excess ag⁺ is 17.2 percent.
What is mass percent?
The ratio of the mass of the solute contained in a solution to the mass of the solution as a whole is known as the mass percent.
Explanation:
Given:
Mass of sample = 2. 500 g
Mass of AgCl = 1. 750 g
The percent of chloride ion in a sample is calculated as,
Molar mass of AgCl = 143.32 g/mol
\(Molar mass of Chlorine atom = 35.45 g/mol\)
Assume that all of the sample's chlorine has precipitated into silver chloride. As a result, the amount of chlorine in silver chloride will match the amount of chlorine in the sample.
First we have to find mass of chlorine,
\(In 143.32 g of silver chloride, mass of chlorine present is 35.45 gSo, in 1.3487 g of silver chloride, mass of chlorine present will be =35.45g/143.32 g * 1.750 g = 0.43 g\)
Therefore, the percent of chloride ion in a sample is
\(Mass of pure chloride compound = 2.500 gMass of chlorine = 0.43 g%Chlorine = 0.43/2.5 *100%Chlorine = 17.2 %\)
Hence, the percent of chloride ion in a sample is \(17.2%\) percent.
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what are 5 physical changes in matter
Answers
Answer:
cutting, bending, dissolving, freezing, and boiling
Explanation:
A physical change is a change in one or more physical properties of matter without any change in chemical properties. In other words, matter doesn't change into a different substance in a physical change. Examples of physical change include but are not limited to, from solid to liquid or from liquid to gas are also physical changes.
The dipole moment of water is 1. 85D but CO2 has zero dipole moment. Why ?
Answers
Answer:
The dipole moment of a molecule depends on the magnitude and direction of the bond dipoles in the molecule. In water, the two O-H bonds are polar, meaning that they have a partial positive charge on the hydrogen atoms and a partial negative charge on the oxygen atom. This creates a net dipole moment for the molecule, with the negative end of the dipole moment located near the oxygen atom and the positive end located near the hydrogen atoms.
In contrast, CO2 has a linear geometry, with two polar C-O bonds oriented in opposite directions. The bond dipoles are equal in magnitude but opposite in direction, so they cancel each other out, resulting in a net dipole moment of zero.
Therefore, the dipole moment of CO2 is zero because the bond dipoles are symmetrically arranged and cancel out each other, while the dipole moment of water is nonzero because the bond dipoles are not symmetrically arranged and do not cancel out each other.
Under which of the following sets of conditions is a real gas expected to deviate from ideal behavior?
(I) High pressure, small volume.
(II) High temperature, low pressure.
(III) Low temperature, high pressure
A. Only I
B. Only II
C. Only III
D. I and III both
Answer: D
Answers
(I) High pressure, small volume.
(III) Low temperature, high pressure
sets of conditions is a real gas expected to deviate from ideal behavior
A theoretical gas called an ideal gas is one that has lots of point particles flying around arbitrarily and not being affected by other particles. The ideal gas notion is advantageous because it complies with the ideal gas law, a condensed equation of state, and is amenable to statistical mechanics analysis. A theoretical gas called an ideal gas is one that has many of randomly moving particles but doesn't have any interparticle interactions. The converse is true for a real gas; it takes up space and its molecules interact. As a result, PV is always equal to nRT.
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Determine the number of grams in a mole of each of the following gases. (Pay attention to gases that have diatomic molecules.) (a) neon g (b) hydrogen g (c) ozone g
Answers
(a) Neon: 20.18 g/mol (b) Hydrogen: 2.02 g/mol (c) Ozone: 48.00 g/mol.
To determine the number of grams in a mole of neon, hydrogen, and ozone gases, we need to use their molar masses.
A mole is defined as the amount of a substance that contains the same number of entities as the number of atoms in exactly 12 grams of carbon-12.
The molar mass of a substance, measured in grams per mole (g/mol), is the mass of one mole of that substance.
Hence, the molar mass of a substance can be calculated by adding up the atomic masses of all the atoms present in one mole of that substance.
(a) Neon: Ne has an atomic mass of 20.18 g/mol.
Hence, one mole of neon has a mass of 20.18 g.
(b) Hydrogen: H2 is a diatomic molecule, meaning that it exists as two atoms bonded together. The atomic mass of hydrogen is 1.01 g/mol.
Therefore, the molar mass of hydrogen is (2 × 1.01) g/mol = 2.02 g/mol. Therefore, one mole of hydrogen has a mass of 2.02 g.
(c) Ozone: Ozone (O3) is a triatomic molecule, meaning that it exists as three atoms bonded together.
The atomic mass of oxygen is 16.00 g/mol.
Therefore, the molar mass of ozone is (3 × 16.00) g/mol = 48.00 g/mol.
Hence, one mole of ozone has a mass of 48.00 g.
The answers are as follows: (a) Neon: 20.18 g/mol (b) Hydrogen: 2.02 g/mol (c) Ozone: 48.00 g/mol.
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Type the correct answer in each box. what is the oxidation state of each element in the compound caso4? include or - in your answers as appropriate. the oxidation state of calcium is . the oxidation state of sulfur is . the oxidation state of oxygen is .
Answers
The oxidation state of Ca in CaSO₄ is +2. The charge of the whole group SO₄ is -2. The charge of S is +6 and that of O is -2.
What is oxidation state?The oxidation state of a species is the numerical charge it possess. Thus, it is the number of electrons the element lost or gained. The total charge of a compound will be zero and every compound tends to exist as neutral.
The total charge of the compound CaSO₄ is zero and that of SO₄ is -2. Hence, to neutralize that Ca lose 2 electrons and form in +2 oxidation state.
The charge of one oxygen is -2. Here we have 4 oxygens and the total charge of all oxygens is -8 in the group SO₄.
Now, the charge of S = (-2) - (-8) = +6. Hence, the oxidation state of sulphur is +6.
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how a sample of copper metal can be separated from the mixture ?
Answers
Answer:
It can be separated by simple fractional method
CAN SOMEONE PLEASE SEND ME A GOOD PICTURE OF A WATER CYCLE WITH ALL THE THINGS THAT HAPPEN IN A WATER CYCLE PLS HELP ME FAST!!!(because I need to draw it for class and I can find good pics, btw they didn’t have the subject science so yea)
Answers
Here you go I hope this helps
NEED HELP!!!
How many moles of magnesium is 3.01 x 1022 atoms of calcium?
preferably a step by step answer....thank u<3
Answers
Answer:
0.03 mol
Explanation:
The equation relating the number of moles and number of atoms is:
Number of atoms = number of moles × 6.02 × 10²³
[6.02 × 10²³ is the Avogadro's constant and is the number of particles in 1 mole of any substance.]
By rearranging the equation, we can find the number of moles of calcium.
Number of moles = (3.01 × 10²²) ÷ (6.02 × 10²³)
Number of moles = 0.05 moles of calcium
Now the only data we know about these two elements are their Mr values, so we are going to find the number of moles of magnesium using ratio.
Moles : Mr
0.05 mol : 40.1
x : 24.3
[we are going to assume that x is the number of moles of magnesium that we have to find out.]
Cross multiply the ratios.
40.1x = 0.05 × 24.3
x = 1.215 ÷ 40.1 = 0.03 mol
List three differences between the earth 240 million years ago and the present earth.
Answers
if i take 2 tables two times per day with 300 tables how many days will my prescription last
Answers
Answer:
150
Explanation:
300 divided by 2
If 33. 9 grams iron oxide react completely with excess aluminum, how many grams of aluminum oxide will be produced
Answers
10.83 grams of aluminum oxide will be produced when 33.9 grams of iron oxide react completely with excess aluminum.
What is mole?The mole idea is a useful way to indicate how much of a substance there is. Any measurement can be divided into two components: the magnitude in numbers and the units in which the magnitude is expressed.
To solve this problem, we first need to balance the chemical equation for the reaction between iron oxide and aluminum:
Fe₂O₃ + 2Al -> 2Fe + Al₂O₃
According to the balanced equation, 1 mole of Fe₂O₃ reacts with 2 moles of Al to produce 1 mole of Al₂O₃. We can use this relationship to convert the given mass of Fe₂O₃ to the mass of Al₂O₃ produced.
The molar mass of Fe₂O₃ is:
(2 x 55.85 g/mol) + (3 x 16.00 g/mol) = 159.70 g/mol
Using the given mass of Fe₂O₃ and its molar mass, we can find the number of moles of Fe₂O₃:
33.9 g Fe₂O₃ x (1 mol Fe₂O₃ / 159.70 g Fe₂O₃) = 0.2122 mol Fe2O3
According to the balanced equation, 1 mole of Fe₂O₃ produces 1/2 mole of Al₂O₃. Therefore, the number of moles of Al₂O₃ produced is:
0.2122 mol Fe₂O₃ x (1/2 mol Al₂O₃ / 1 mol Fe₂O₃) = 0.1061 mol Al₂O₃
Finally, we can convert the number of moles of Al₂O₃ to its mass using its molar mass:
0.1061 mol Al₂O₃ x 101.96 g/mol = 10.83 g Al₂O₃
Therefore, 10.83 grams of aluminum oxide will be produced when 33.9 grams of iron oxide react completely with excess aluminum.
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Convert 520 inches to cm using the conversion factor that 1 inch = 2.54 cm.
1320 c
O 45.59 cm
O 0.005 cm
O205 inches
Answers
Answer:
Explanation:
520:2.54=204.7 round to 205 the answer=205 cm=520 inches
How is the number of electrons in an element determined?
Answers
The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.
Answer:
By finding the number of protons
Explanation:
Keep in mind when trying to find the number of electrons of a element, the number of electrons also equals the number of protons. In order to find the number of protons in the element simply find it's atomic number.
Example:
Find the number of electrons in the element iron.
Fe (Iron)
Fe's atomic number is 26
Protons/electrons = 26
Hope this helps.
True/False : in a synthesis reaction, aluminum metal and chlorine gas react to form aluminum chlorid
Answers
Answer:
In a synthesis reaction, aluminium metal and chlorine gas react to form aluminium chloride is true
Explanation:
A synthesis reaction, also known as a combination reaction, is a type of chemical reaction where two or more reactants combine to form a single product. In this case, the reactants are aluminum metal (Al) and chlorine gas (Cl2), and the product is aluminum chloride (AlCl3).
During the reaction, aluminum atoms react with chlorine molecules to form aluminum chloride. The aluminum atoms lose electrons to become positively charged ions (Al3+), while the chlorine molecules gain electrons to form negatively charged chloride ions (Cl-). The electrostatic attraction between the oppositely charged ions results in the formation of aluminum chloride.
The balanced chemical equation for the reaction can be written as:
2Al + 3Cl2 -> 2AlCl3
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Use the mass and volume data to calculate the density of an unknown metal to the nearest hundredth.
Mass of unknown metal = 222.50 g
Volume of unknown metal = 25.00
What is the density of the unknown metal?
0.11
0.89
8.90
5,562.50
Answers
Answer:
8.90
Explanation:
Density = mass ÷ volume
D = 222.50 g ÷ 25.00
= 8.9
The density of the unknown metal is 8.90.
Hope that helps.
Answer:
C: 8.90
Explanation:
Which of these equations is balanced?
1. 4Sb + 3O2 → Sb4O6
2. H3 AsO4 → As2O5 + H2O
3. SiO2 + HF → SiF4 + H2O
4. CO2 + NH3 → CO(NH2)2 + H2O
Answers
Answer:
the first is the answer
need help asap!!!
so i don’t necessarily need an answer just how to solve everything.
this is the first one:
calcium hydroxide + ammonium chloride
the instructions are attached to this question. i’m just not sure how to do everything. it doesn’t give me the products side only the reactants so how am i supposed to write and balance the equation?
Answers
Explanation:
とおふぉくぉをえおろとようおいおぽあおそ・
'」*とまっぉのもヴぉこぉぞぽ、こ、
Answer:
Ca(OH)2 + 2NH4Cl .................. CaCl2 + 2NH3 + 2H2O