The mass of steam required to raise the temperature of water is 3.5 g.
The given parameters;
mass of the benzene, = 47.6initial temperature of the benzene, = 5.5 ⁰Cfinal temperature of the benzene = 30 ⁰CThe molar mass of Benzene = 78.11 g/mol
The molar mass of water = 18 g/mol
The number of moles of the Benzene is calculated as follows;
[tex]n = \frac{47.6}{78.11} = 0.61 \ mole[/tex]
The mass of steam required is calculated as follows;
heat lost by steam = heat absorbed by benzene
[tex]\frac{m}{18} \times 40.7 \times 10^3 = 47.6(1.63)(30-5.5) \ + \ 0.61 \times 9.87 \times 10^3\\\\2261.11 m = 7921.61\\\\m = \frac{7921.61}{2261.11} \\\\m = 3.5 \ g[/tex]
Thus, the mass of steam required to raise the temperature of water is 3.5 g.
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what is the final volume (L) of each of the following diluted solutions? a 0.70 M HCl solution prepared from 25 mL of a 6.0 M HCl solution
The final volume of diluted solution is 214.39 mL
From the question given above, the following data were obtained:
Molarity of diluted solution (M₂) = 0.7 M
Molarity of stock solution (M₁) = 6 M
Volume of stock solution (V₁) = 25 mL
Volume of diluted solution (V₂) = ?M₁V₁ = M₂V₂
6 × 25 = 0.7 × V₂
150 = 0.7 × V₂
Divide both side by 0.7
V₂ = 150 / 0.7
V₂ = 214.39 mLTherefore, the volume of the diluted solution is 214.39 mL
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Identify the major product that is obtained when 1-hexyne is treated with H2 and Pd. cis-2-hexene 1-hexene hexane trans-2-hexene
The major product obtained when 1-hexyne is treated with H2 and Pd is; 1-hexene.
The structure of 1-hexyne is such that it possesses a triple bond around its first Carbon in it's carbon chain.
On this note; hydrogenation by treatment with H2 and Paladium, Pd as catalyst yields 1-hexene as the major product.
PS: Paladium, Pd is the major constituent of the Lindlar's catalyst.
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Using chemical equations, show how the triprotic acid H3PO4 ionizes in water. Phases are optional.
Ka1:
Ka2:
Ka3:
Explanation:
H3PO4 is a weak acid so it partially dissociates in water
Ka1
H3PO4 (aq) + H2O(l) <----> H2PO4-(aq) + H3O+ (aq)
Ka2
H2PO4- (aq) + H2O(l) <----> HPO4 2- (aq) + H3O+ (aq)
Ka3
HPO4 2- (aq) + H2O(l) < ---> PO4 3- (aq) + H3O+ (aq)
What happens to the particles of air inside a ball it warms in the sun?
Answer:
The particles start moving faster and expand making the ball expand.
Explanation:
How many atoms are in mercury (I) phospate?
The chemical formula is (Hg2)3(PO4)2
A)11
B)14
C)15
D)16
Mercury (I) phosphate with the chemical formula (Hg2)3(PO4)2 has 16 atoms.
Number of Hg atoms = 2x3 = 6Number of P atoms = 2 x 1 = 2Number of O atoms = 4x2 = 8Sum of all the atoms = 6+2+8
= 16 atoms
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H3PO4 + KOH yields K3 PO4 + H2O
need help balancing
Answer:
H3PO4 + 3KOH---------> K3PO4 + 3H2O
Explanation
H3PO4 + KOH------------> K3PO4 + H20
when an hydrogen ion containing acid (HX) reacts with a hydroxide containing base(BOH) they produce water and a "salt".
water can be called dihydrogen oxide (H2O), but it can also be called
hydrogen hydroxide (HOH)...same thing.
so the phosphoric acid (H3PO4) contains 3 hydrogen ions (H), and needs 3
hydroxide ions to from 3 hydrogen hydroxides .. that is 3 waters AND A "SALT" WITH THE REMAINING SPECIES ( K AND PO4)
so let us balance
H3PO4 + 3KOH--------->K3PO4 + 3HOH or
H3PO4 + 3KOH---------> K3PO4 + 3H2O
Check:
6 H on the left side, 6 H on the right side
1 P on the left side, 1 P on the right side
3 K on the left side, 3 K on the right side
7 O on the left side, 7 O on the right side
abadabaabdabadaba........that's all folks
yup it is balanced
Determine the mass in grams of 5.15 × 10²¹ atoms of chromium. (The mass of one mole of chromium is 52.00 g.)
The mass of 5.15 × 10²¹ atoms of chromium is 0.44 g
From Avogadro's hypothesis,
6.02×10²³ atoms = 1 mole of Cr
But:
1 mole of Cr = 52 g
Thus, we can say that:
6.02×10²³ atoms = 52 g of Cr
With the above information, we can obtain the mass of 5.15 × 10²¹ atoms of chromium. This can be obtained as follow:
6.02×10²³ atoms = 52 g of Cr
Therefore,
5.15×10²¹ atoms = (5.15×10²¹ × 52) / 6.02×10²³
5.15×10²¹ atoms = 0.44 g of Cr
Thus, the mass of 5.15 × 10²¹ atoms of chromium is 0.44 g
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A 4.0 L flask containing N2 at 15 atm is connected to a 4.0 L flask containing H2 at 7.0 atm and the gases are allowed to mix. What is the mole fraction of N2
The mole fraction of N₂ after the mixture of 4.0 L of N₂ at 15 atm with 4.0 L of H₂ at 7.0 atm is 0.68.
We can calculate the mole fraction of N₂ with the following equation:
[tex] X_{N_{2}} = \frac{n_{N_{2}}}{n_{t}} = \frac{n_{N_{2}}}{n_{N_{2}} + n_{H_{2}}} [/tex] (1)
The number of moles of N₂ and H₂ can be found with the ideal gas law:
[tex] PV = nRT [/tex]
Where:
P: is the pressure
R: is the gas constant
T: is the temperature
V: is the volume
For nitrogen gas we have:
[tex] n_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{RT} [/tex] (2)
And for hydrogen:
[tex] n_{H_{2}} = \frac{P_{H_{2}}V_{H_{2}}}{RT} [/tex] (3)
After entering equations (2) and (3) into (1), we get:
[tex] X_{N_{2}} = \frac{\frac{P_{N_{2}}V_{N_{2}}}{RT}}{\frac{P_{N_{2}}V_{N_{2}}}{RT} + \frac{P_{H_{2}}V_{H_{2}}}{RT}} [/tex]
Since RT are constants, we have:
[tex] X_{N_{2}} = \frac{P_{N_{2}}V_{N_{2}}}{P_{N_{2}}V_{N_{2}} + P_{H_{2}}V_{H_{2}}} [/tex]
We know that:
[tex] P_{N_{2}} = 15 atm[/tex]
[tex] V_{N_{2}} = 4.0 L[/tex]
[tex] P_{H_{2}} = 7.0 atm[/tex]
[tex] V_{H_{2}} = 4.0 L[/tex]
so:
[tex] X_{N_{2}} = \frac{15 atm*4.0 L}{15 atm*4.0 L + 7.0 amt*4.0 L} = 0.68 [/tex]
Therefore, the mole fraction of N₂ is 0.68.
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Suppose that in an equilibrium mixture of HCl, Cl2, and H2, the concentration of H2 is 1.0 x 10-11 mol-L-1and that of Cl2 is 2.0 x 10-10 mol-L-1. What is the equilibrium molar concentration of HCl at 500 K, given Kc = 4.0 x 1018 for H2(g) +Cl2(g) ⇆ 2HCl(g).
Considering the definition of Kc, the equilibrium molar concentration of HCl at 500 K is 0.0894 [tex]\frac{mol}{L}[/tex].
The balanced reaction is:
H₂(g) +Cl₂(g) ⇆ 2 HCl(g)
Equilibrium is a state of a reactant system in which no changes are observed as time passes, despite the fact that the substances present continue to react with each other. In other words, reactants become products and products become reactants and they do so at the same rate.
In other words, chemical equilibrium is established when there are two opposite reactions that take place simultaneously at the same speed.
The concentration of reactants and products at equilibrium is related by the equilibrium constant Kc. Its value in a chemical reaction depends on the temperature and the expression of a generic reaction aA + bB ⇄ cC is
[tex]K_{c} =\frac{[C]^{c} x[D]^{d} }{[A]^{a} x[B]^{b} }[/tex]
That is, the constant Kc is equal to the multiplication of the concentrations of the products raised to their stoichiometric coefficients by the multiplication of the concentrations of the reactants also raised to their stoichiometric coefficients.
In this case, the constant Kc can be expressed as:
[tex]K_{c} =\frac{[HCl]^{2} }{[H_{2} ]x[Cl_{2} ] }[/tex]
You know that in an equilibrium mixture of HCl, Cl₂, and H₂:
the concentration of H₂ is 1.0×10⁻¹¹ [tex]\frac{mol}{L}[/tex]the concentration of Cl₂ is 2.0×10⁻¹⁰ [tex]\frac{mol}{L}[/tex]Kc=4×10¹⁸Replacing in the expression for Kc:
[tex]4x10^{18} =\frac{[HCl]^{2} }{[1x10^{-11} ]x[2x10^{-10} ] }[/tex]
Solving:
[tex]4x10^{18} =\frac{[HCl]^{2} }{2x10^{-21} }[/tex]
[tex]4x10^{18} x 2x10^{-21}=[HCl]^{2}[/tex]
[tex]8x10^{-3} =[HCl]^{2}[/tex]
[tex]\sqrt[2]{8x10^{-3}} =[HCl][/tex]
0.0894 [tex]\frac{mol}{L}[/tex]= [HCl]
Finally, the equilibrium molar concentration of HCl at 500 K is 0.0894 [tex]\frac{mol}{L}[/tex].
Learn more:
https://brainly.com/question/16398257?referrer=searchResultshttps://brainly.com/question/16103208?referrer=searchResultshttps://brainly.com/question/14911401?referrer=searchResultshttps://brainly.com/question/24041542?referrer=searchResultshttps://brainly.com/question/14203237?referrer=searchResultsCalculate how many moles are in 63.1 grams FeCl3.
Answer: 1 grams FeCl3 = 0.0061650760770388 mole using the molecular weight calculator and the molar mass of FeCl3.
Explanation:
10. Select the more polar bond in each of the following pairs: a) C and N or C and o b) N and F or N and O.
Jackson uses a battery operated toothbrush that is rechargeable. what happens when Jackson plugs in his toothbrush into an electrical outlet to recharge it ?
A. chemical energy is transformed to sound energy.
B. electrical energy is transformed to kinetic energy.
C. chemical energy is transformed to kinetic energy.
D. electrical energy is transformed to chemical energy
Answer:
the answer would be B
Explanation:
The power from the charger use electricity and the electricity transforms to energy that can be moved
What is the temperature, in Celsius, of 20.8 g of carbon dioxide (CO2) in a 575 mL container under 1.5 atm of pressure?
Answer:
Ideal Gas Law Calculator. Easily calculate the pressure, volume, temperature or quantity in moles of a gas using this combined gas law calculator (Boyle's law calculator, Charles's law calculator, Avogadro's law calculator and Gay Lussac's law calculator in one).Supports a variety of input metrics such as Celsius, Fahrenheit, Kelvin, Pascals, bars, atmospheres, and volume in both metric and
how many nuetrons are in the nucleous of an atom number of 25?
Answer:
I believe there are 30
Explanation:
What is the mass of 8 moles of sodium chloride?
468 g
4.68 9
46.8 g
4.689 mol
Please answer
I'll mark BRAINLIST
Answer:
468 g _______________________
The mass of 8 moles of sodium chloride is 468 grams. Therefore, option A is correct.
Molar mass, also known as molecular weight, is the mass of one mole of a substance. It is typically expressed in grams per mole (g/mol). Molar mass is calculated by summing the atomic masses of all the atoms in a molecule.
To calculate the mass of a substance, multiply the number of moles by the molar mass of the substance. The molar mass of sodium chloride (NaCl) is approximately 58.44 grams per mole.
The mass of 8 moles of sodium chloride:
Mass = Number of moles × Molar mass
Mass = 8 moles × 58.44 g/mol
Mass = 467.52 grams
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Pleeeeasee someone who’s good at chemistry?! 10 grade
ASAP
I’ll give points, just help please
How do we know flowing water is the geologic process that formed the channel on Mars?
Evidence that water was once present on a planet is evidence that the planet may once have had living organisms. When landforms on different rocky planets look similar, it is evidence that they may have been formed by the same geologic process. The channel on Mars may have been caused by flowing water or flowing lava.
Hopes this helps :)
Construct a conclusion using the claim, evidence and reasoning format to explain the typical properties observed by ionic and covalent compounds.
Answer:
The key to understanding why ionic and covalent compounds have different properties from each other is understanding what's going on with the electrons in a compound. Ionic bonds form when atoms have different electronegativity values from each other. When the electronegativity values are comparable, covalent bonds form.
But, what does this mean? Electronegativity is a measure of how easily an atom attracts bonding electrons. If two atoms attract electrons more or less equally, they share the electrons. Sharing electrons results in less polarity or inequality of charge distribution. In contrast, if one atom attracts bonding electrons more strongly than the other, the bond is polar.
Ionic compounds dissolve in polar solvents (like water), stack neatly on each other to form crystals, and require a lot of energy for their chemical bonds to break. Covalent compounds can be either polar or nonpolar, but they contain weaker bonds than ionic compounds because they are sharing electrons. So, their melting and boiling points are lower and they are softer.
I hope this helps have a great day :)
17.
In the reaction N2 + 3H2 → 2NH3 how many moles of ammonia will be produced from 1.30 mol
of hydrogen and excess nitrogen?
According to the equation given, we have N2 + 3H2 → 2NH3.
Therefore, to determine the moles of NH3 we have to do the following-
1.3 mol H2 × 2 mol NH3 / 3 mol H2 = 0.87 mol
Answer: .87 moles of NH3 are produced from 1.3 moles of H2.
I hope this helps!
What element is a gas at room temp, has 6 valence electrons, and is non-reactive
Answer:
Noble gases
Explanation:
Noble gases are nonreactive, nonmetallic elements in group 18 of the periodic table. As you can see in the periodic table in the figure below, noble gases include helium (He), neon (Ne), argon (Ar), krypton (Kr), xenon (Xe), and radon (Rn).18 Jun 2021
Mixtures of hydrogen and oxygen in varying concentrations can be sparked to produce water. Define mixture and compound, and then explain the differences between a mixture of hydrogen and oxygen and the compound dihydrogen monoxide (also known as water).
Explanation:
Mixture is the physical Combination Of two or Substance
Example
a mixture of sugar and water.
Compound is the chemical combination of two or more metals.
Example.
a mixture of hydrogen and water.
A mixture of hydrogen and oxygen forms water or H2O
whereas The dihydrogen monoxide parody involves calling water by an unfamiliar chemical name, most often "dihydrogen monoxide" (DHMO), and listing some of water's properties in a particularly alarming manner, such as accelerating corrosion (rust) and causing suffocation (drowning). The parody often calls for dihydrogen monoxide to be banned, regulated, or labeled as dangerous. It plays into chemophobia and demonstrates how a lack of scientific literacy and an exaggerated analysis can lead to misplaced fears. The parody has been used with other chemical names such as hydrogen hydroxide, dihydrogen oxide, hydroxic acid, hydric acid and oxidane.
A Mixture of hydrogen and oxygen in varying concentrations can be sparked to produce water. This is formed due to the property of chemical combination.
A Mixture is the physical Combination Of two or Substance whereas a Compound is the chemical combination of two or more metals.
Example of a mixture is a mixture of sugar and water. And, Example of an compound is A mixture of hydrogen and oxygen forms water or H₂O
Water is also called as dihydrogen monoxide. The prefix mono and di are used to indicate a single atom and combination of two atoms respectively. Some of its properties includes such as accelerating corrosion (rust) and causing suffocation (drowning).
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Using the combined gas
law, what is the final
volume of the Helium gas?
This is the answer i hope it helps
A sample of gas has Pi = 0.768 ATM, Vi = 10.5 L, and Ti = 300 K. What is the final pressure if VF = 7.85 L and T and f = 250 K?
Question 2
Which of the following models the arrangement of atoms in a gas?
O None of these
PLEASE HELP ASAP
Answer:
The option where the atoms are furthest apart.
Explanation:
Gasses are the most energetic of the three basic states of matter, their atoms have more kinetic energy than either solids or liquids and will therefore also have the most spread out atoms.
PLS HELP= BRAINLIEST AND POINTS
Question 11 pts
What is the term for the "invisible force" that holds you to Earth's surface?
Group of answer choices
gravity
mass
attraction
matter
Flag question: Question 2
Question 21 pts
Once an object is in motion, what type of energy is being used?
Group of answer choices
kinetic energy
gravity
potential energy
Flag question: Question 3
Question 31 pts
The Moon's mass is lower than that of Earth, thus its gravity is ____ Earth’s gravity.
Group of answer choices
less than
more than
the same as
Flag question: Question 4
Question 41 pts
When you roll a ball across a rug, what slows it to a stop?
Group of answer choices
Friction resists the ball’s forward motion.
The rug doesn’t have enough momentum to keep the ball rolling.
The rug doesn’t have enough force to keep the ball rolling.
The ball isn’t moving fast enough.
Flag question: Question 5
Question 51 pts
A championship swimmer swims 20 meters in 10 seconds. What is his speed?
Group of answer choices
20 m/s
2.0 m/s
0.5 m/s
200 m/s
Flag question: Question 6
Question 61 pts
Without an unbalanced force, an object will ____.
Group of answer choices
change its direction
maintain its velocity
stop moving altogether
change its speed
Flag question: Question 7
Question 71 pts
Which of the following indicates how fast something is moving?
Group of answer choices
speed
gravity
force
inertia
Flag question: Question 8
Question 81 pts
Which of Newton's laws is also known as the law of inertia?
Group of answer choices
Newton's third law
Newton's first law
Newton's second law
Flag question: Question 9
Question 91 pts
Which object would need the greatest force to overcome its inertia?
Group of answer choices
a sports car
a bicycle
a dump truck
a tennis ball
Flag question: Question 10
Question 101 pts
Which of the following is described by the change in an object’s position?
Group of answer choices
force
position
motion
Explanation:
gravity
kinetic energy
less than
friction resists the ball's movement
2.0 m/s
change its direction
speed
newton's first law
dump truck
position
Answer:
Q1 - Gravity
Q2 - Kinetic Energy
Q3 - Less than
Q4 - Friction resists the ball's forward motion
Q5 - 2 m/a
Q6 - Change its speed
Q7 - Speed
Q8 - Second law
Q9 - a dump truck
Q10 - motion
I am not sure about some answers but I answered all questions.
Imagine that you are toasting marshmallows using a metal stick over an open fire at your campsite.
Which of the following is the effect of radiation in this scenario?
Radiation causes heat to warm the entire campsite.
Radiation causes the metal stick to increase in temperature.
Radiation causes heat from the fire to warm the air.
Radiation causes hot air to move up to toast the marshmallow.
Answer:
Radiation causes the metal stick to increase in temperature.
Explanation:
Answer:
Radiation causes heat from the fire to warm the air.
Explanation:
HELP ME OUT PLEASE!!
Barium sulfate, BaSO4 is a white crystalline solid that is insoluble in water. It is used by doctors to diagnose problems with the digestive system,
Barium hydroxide, Ba(OH)2 is also a white crystalline solid and is used in wastewater treatment.
How many more oxygen atoms are represented in the formula for barium sulfate than in the formula for barium hydroxide?
A) 2
B) 4
C) 1
D) 8
Answer: 2
Explanation:
Ba(OH)2 contains two oxygen atoms
BaSO4 contains four oxygen atoms.
This means that barium sulfate contains two more oxygen atoms than barium hydroxide in its formula.
Hope this helps!! :)
According to formula BaSO₄, Barium sulfate contains 2 more oxygen atom.
The correct option is (A) 2
Barium sulfate's distinguishing featureBa(OH)₂ has two oxygen atoms in it.
Four oxygen atoms may be found in BaSO₄.
This indicates that the formula of barium sulfate has two extra oxygen atoms than the formula of barium hydroxide.
Barium sulfate, often known as BaSO4, is a transparent white pigment that has a long history. It is produced by combining sulfuric acid with barium hydroxide and other sources of barium.
Chemically speaking, barium hydroxide has the formula Ba(OH)2. The monohydrate of barium, sometimes referred to as baryta or baryta-water, is one of the element's main compounds. The typical commercial form of monohydrate is this white granular substance.
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Chemistry
Help me please.
Answer:
4:6
Explanation:
How many double bonds does CCL2H2 have?
3.00 L of a gas is collected at 35.0 C and 0.93 atm. What is the volume at STP
cyclopropane is a commonly used anesthetic. If a 2.00 L flask contains 3.11 g of cyclopropane gas at 684 mmHg pressure and 23.0 C, what is the molecular mass of cyclopropane
Answer:
42.0g/mol
Explanation:
The steps for this question is to use the ideal gas law, and then use n=m/M to find molar mass.
PV = nRT
n= PV/RT
Change 23 degrees to 296.15 K and 684mmHg to kpa
n = (91.1925kpa)(2.00L)/(8.314Lkpa/mol K)(296.15K)
n= 0.074mol
n = m/M
M = m/n
M = 41.98489g/mol
