Answers
Answer:
The correct answer is - [tex]\frac{P}{4}[/tex].
Explanation:
By the ideal gas equation is PV=nRT, the relation between pressure and volume can be drive if the temperature remains constant:
At constant temperature, for a fixed amount of gas, P∝
so the pressure is inversely proportional to volume. Therefore, if the volume is increased in this condition the pressure will decrease in the same manner and A decrease in the volume will lead to an increase in pressure.
Volume increased here = four times = 4V
pressure is P will decrease four times = P/4
Related Questions
How would you write 0.620 in scientific notation?
Answers
If 95.0 g Zn is added to an excess of H2SO4, how many
liters of hydrogen gas will be produced at STP?
Write and balance the equation. Then, calculate the
liters of hydrogen produced.
Please help
Answers
Answer:
32.7 L of H₂
Explanation:
We'll begin by calculating the number of mole in 95 g of Zn. This can be obtained as follow:
Mass of Zn = 95 g
Molar mass of Zn = 65 g/mol
Mole of Zn =?
Mole = mass /Molar mass
Mole of Zn = 95/65
Mole of Zn = 1.46 mole
Next, we shall determine the number of mole of H₂ produced by the reaction of 95 g (i.e 1.46 mole) of Zn. This can be obtained as illustrated below:
Zn + H₂SO₄ —> ZnSO₄ + H₂
From the balanced equation above,
1 mole of Zn reacted to produce 1 mole of H₂.
Therefore, 1.46 mole of Zn will also react to produce 1.46 mole of H₂.
Finally, we shall determine the volume of H₂ obtained at STP. This can be obtained as follow:
1 mole of H₂ = 22.4 L at STP.
Therefore,
1.46 mole of H₂ = 1.46 × 22.4
1.46 mole of H₂ = 32.7 L at STP
Thus, 32.7 L of H₂ were obtained from the reaction.
What occurs in combustion reaction? Explain
Answers
Answer:
In a combustion reaction, a substance reacts with oxygen from the air. Combustion reactions happen at high temperatures, and transfer energy to the surroundings as light and heat. This is why you see flames when things burn. ... The products of combustion reactions are compounds of oxygen, called oxides.
10. Many cooking pans are made of aluminium although it is a reactive metal, Explain.
Answers
Answer:
Aluminium is a highly reactive metal yet it is used to make utensils for cooking this is because aluminium reacts with oxygen present in air to form a thin layer of Aluminium oxide is oxide layer is very stable and prevent for the reaction of aluminium with oxygen
What is the molar mass of Mg(HSO3)2?
Answers
What happens after coral is bleached?
It produces peroxides.
It releases algae into the ocean.
It dies immediately.
It is susceptible to starvation
Answers
What is the meaning of ground state energy?
Answers
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why the ph of glycine increases when 0.1 M NaOH is added dropwise
Answers
Answer:
The acid-base reaction produces glycine reduction, and hence the increase of glycine pH.
Explanation:
The glycine is an amino acid with the following chemical formula:
NH₂CH₂COOH
The COOH functional group is what gives the acid properties in the molecule.
Hence, when NaOH is added to glycine an acid-base reaction takes place in which COOH reacts with the NaOH added:
NH₂CH₂COOH + OH⁻ ⇄ NH₂CH₂COO⁻ + H₂O
The glycine concentration starts to shift to its ion form (NH₂CH₂COO⁻) because of the reaction with NaOH, that is why the pH glycine increases when NaOH is added.
Therefore, the acid-base reaction produces glycine reduction, and hence the increase of glycine pH.
I hope it helps you!
Mention two functions performed by the concentrated sulfuric acid in the reaction
Answers
Answer:
Concentrated sulfuric acid is used as a catalyst, and has a dual role:
-Speeds up the reaction.
-Acts as a dehydrating agent, forcing the equilibrium to the right and resulting in a greater yield of ester.
The two functions performed by the concentrated sulfuric acid in the reaction is that Concentrated sulphuric acid often removes molecules of water from formic acid and it acts as a dehydrating agent in creation of carbon monoxide.
The function of the concentrated sulfuric acid in a reaction is that Concentrated sulfuric acid can be used as a catalyst.
It help to Speeds up the reaction and can also be a dehydrating agent, by bringing in the equilibrium to the right and leading to a greater yield of ester.
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Which of these is a pair of coordination isomers (aka ionization isomers)?
a. Na2[NiBr2Cl2] and K2[NiBr2Cl2]
b. [Ni(NH3)3Br]Cl and [Ni(NH3)3Cl]Br
c. [Ni(NH3)3(H2O)]SO4 and [Ni(NH3)2(H2O)2]SO4
Which of these pairs are linkage isomers??
a. [Pt(Cl)2(SCN)4]^4- and [Pt(Cl)2(NCS)4]^4-
b. [Pt(Cl)2(SCN)4]^4- and [Pt(Cl)4(SCN)2]^4-
c. K4[Pt(Cl)2(SCN)4] and Na4[Pt(Cl)2(SCN)4]
Answers
Answer: [tex][Ni(NH_3)_3Br]Cl[/tex] and [tex][Ni(NH_3)_3Cl]Br[/tex] are ionization isomers.
[tex][Pt(Cl)_2(SCN)_4]^{4-}[/tex] and [tex][Pt(Cl)_2(NCS)_4]^{4-}[/tex] are linkage isomers.
Explanation:
Ionization isomerism occur when a ligand that is bound to the metal center exchanges places with an anion or neutral molecule that was originally outside the coordination complex
Thus [tex][Ni(NH_3)_3Br]Cl[/tex] and [tex][Ni(NH_3)_3Cl]Br[/tex] are ionization isomers.
Linkage isomerism is the existence of coordination compounds that have the same composition differing with the connectivity of the metal to a ligand.
Thus [tex][Pt(Cl)_2(SCN)_4]^{4-}[/tex] and [tex][Pt(Cl)_2(NCS)_4]^{4-}[/tex] are linkage isomers.
HELP I DON'T HAVE TIME LEFT
Answers
Answer:
mass
Explanation:
Answer:
C Mass
Explanation:
mass wont change when a force is put upon it.
Which chemical element represents the most abundant “atoms of an element” found in air?
Answers
Answer:
The order of elements by volume-fraction (which is approximately molecular mole-fraction) in the atmosphere is nitrogen (78.1%), oxygen (20.9%), argon (0.96%), followed by (in uncertain order) carbon and hydrogen because water vapor and carbon dioxide, which represent most of these two elements in the air, are variable.
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Which of the following answers is true for the following statement?
The conjugate acid of a strong base is:
O aweak acid
O an amphiprotic acid
O a polyprotic acid
O a lousy (or very weak) acid
O a strong acid
Answers
it is either "aweak acid or a lousy (or very weak) acid"
How many grams of MgCl2 would be needed to make 5.3 liters of a 0.25 molar solution? Round your answer to the nearest 0.01,
Answers
Answer: 126.1 grams of are needed to make 5.3 L of 0.25 M solution
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per liter of the solution.
To calculate the mass of solute for given molarity, we use the equation:
[tex]\text{Molarity of the solution}=\frac{\text{given mass of solute}}{\text {Molar mass of solute}\times \text{Volume of solution in L}}[/tex]
[tex]0.25M=\frac{x}{95.2g/mol\times 5.3L}[/tex]
[tex]x=126.1g[/tex]
Thus 126.1 grams of are needed to make 5.3 L of 0.25 M solution
how many grams of P3O9 contain 9.67x10^23 atoms of oxygen?
Answers
Answer:
49.1 g
Explanation:
First we convert 9.67x10²³ atoms of oxygen into moles, using Avogadro's number:
9.67x10²³ atoms ÷ 6.023x10²³ atoms/mol = 1.60 mol OThen we calculate how many P₃O₉ moles there would be with 1.60 O moles:
1.60 mol O * [tex]\frac{1molP_3O_9}{9molO}[/tex] = 0.18 mol P₃O₉Finally we convert 0.18 P₃O₉ moles into grams, using its molar mass:
0.18 mol P₃O₉ * 237 g/mol = 49.1 gIn a Sodium ion 11Na +1
atomic number =11
mass number =23 ,
the number of electrons =
Answers
Answer:
11 electrons
Explanation:
The number of electrons is the same as the number of protona in a ATOM.
They will most likely be different in a ion, simple bond or a convalent bond.
For each molecule, specify the polarity of the bonds and the overall polarity of the molecule.
A. A central beryllium atom is connected to two chlorine atoms through single bonds.
B. Each chlorine atom has three lone pairs of electrons.
C. A central oxygen atom is connected to two hydrogen atoms through single bonds.
D. There are two lone pairs of electrons around the oxygen atom.
Are the bonds for each one polar or non polar? Are the molecules for each one polar or non polar?
A. BeCl2
B. H2O
C. O3
Answers
Answer:
See explanation
Explanation:
We know that the possession of polar bonds does not make a molecule polar. The BeCl2 molecule has Be-Cl bonds which are polar. However, the molecule is symmetrical and has a zero net dipole moment hence the molecule is nonpolar.
H2O is a polar molecule. It has polar O-H bonds. The molecule is bent and has a resultant dipole moment hence it is polar.
Ozone is a triatomic molecule which is bent in shape. This bent geometry creates an overall dipole moment in the molecule, hence the molecule is polar.
Which properties do atoms of the same element share? *
chemical reactivity
melting point
Answers
Hope this helps you.
Cells are made of cells true or false
Answers
false
cells are made up of nucleus and cytoplasm and it's contained within the cell membrane
Type the CONVERSION factor (fraction) to calculate the moles in 15.0 g
of potassium sulfide, K2S. *
10 points
Answers
Explanation:
5g C7H8 / 92g/mole = 0.054moles
total moles = 0.232moles
mole fraction C6H12 = 0.178moles / 0.232moles = 0.767
mole fraction C7H8 = 0.233
A sample of gas at a pressure of 0.850 atm has a volume of 675 mL. What will the
volume be if the pressure is increased to 1.50 atm?
Answers
Answer:
382mL
Explanation:
Boyle's Law P₁V₁ = P₂V₂
(0.850atm)(675mL) = (1.50atm)(V₂)
573.75 = (1.50atm)(V₂)
V₂ = 573.75/1.50
V₂ = 382.5mL = 382mL
Small particles that settle out of wind and water are called.
Answers
A. Land bridges became exposed.
B. Sea levels rose over 300 feet.
C. A mass extinction occurred.
D. The Cenozoic era began.
Diabetes mellitus is characterized by too much glucose buildup in the blood. In _________________ diabetes, this is because the target cells of the body's tissues fail to respond to insulin; in later stages of this type of diabetes, the _______________ begins to fail and eventually stops secreting the hormone insulin, which is required to decrease blood glucose levels. In ______________ diabetes, this is because there are ______________ number of beta cells available to secrete insulin; this results in an insufficient amount of insulin to meet the demands of the body.
Now, choose the individual who is most likely to have type 2 diabetes:
A. A 6-year-old child
B. A 62-year-old inactive man who is tired all the time
C. A 40-year-old runner with tendonitis
D. An overweight teenage girl whose grandmother has diabetes
Answers
Diabetes mellitus is characterized by too much glucose buildup in the blood. In Type 2 diabetes, this is because the target cells of the body's tissues fail to respond to insulin; in later stages of this type of diabetes, the pancreas begins to fail and eventually stops secreting the hormone insulin, which is required to decrease blood glucose levels. In Type 1 diabetes, this is because there are less number of beta cells available to secrete insulin; this results in an insufficient amount of insulin to meet the demands of the body. A 62-year-old inactive man who is tired all the time is most likely to have a type 2 diabetes.
What are pancreas?It is an organ located in abdominal region.It severs as an endocrine as well as an exocrine gland.The hormones produced by it helps in regulating blood glucose level.As an endocrine gland, it secretes hormone insulin which coverts glucose into glucagon and glucagon which converts glucagon into glucose.As an exocrine gland, it secrete juices that helps in digestion. What is diabetes mellitus?It is a condition in which you body's blood glucose level is high.The pancreas does not produce enough insulin that is required by our body.It is of three types: Type 1, Type 2 and gestational diabetes.Type 1 diabetes is a condition in which the immune system of our body destroys the beta cells of pancreas that secretes insulin.Type 2 diabetes: In this the beta cells of pancreas are very low and it does not make enough insulin to meet the demands of the body.Type 2 diabetes is usually occurs in person of over 45 years age.Hence, the correct option is B. A 62-year-old inactive man who is tired all the time.
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How does molecular formula differ from empirical formula and structural
formula? Cite an example.
Answers
Answer:
Empirical formulas show the simplest whole-number ratio of atoms in a compound, molecular formulas show the number of each type of atom in a molecule, and structural formulas show how the atoms in a molecule are bonded to each other.
Explanation:
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People can hear ultrasound easily.
A. True
B. False
Answers
Which of the following represents a beta decay?
O A. 220/86 Rn → 294/84Po + 4/2 He
O B. 60/28 Ni → 60/28 Ni + y
C. 235/93 Np → 23/91 Pa+ x
O D. 213/83 Bi → 214/84 Po+0/-1e
Answers
Answer:
Option D
Explanation:
Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex] represents a beta decay. Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
What beta decay?In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex]
In beta decay, one of the neutrons in the nucleus suddenly changes into a proton, causing an increase in the atomic number of an element.
Hence, option D is correct.
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Explain what you discovered from the Simulation about why food coloring spreads faster in warmer water.
Answers
Answer:
the water molecules have more energy and are moving faster than the molecules of cold water. This makes it easier for the dye to get mixed throughout the hot water.
Explanation:
Answer:
Because particles moves more by kinetic energy and diffusion will spread with the particles
Explanation:
Why does concentration increase when the solvent evaporates?
Answers
Answer:
The concentration increases because the solution becomes more pure because the solvent leaves the solution.
Explanation:
Each person in a room is assumed to be producing carbon dioxide at the average rate of 0.0107 cfm (5.0 ml/s) and air with a CO2 concentration of 280 ppm is being supplied to the room at the rate of 6000 cfm (2.8 m3/s). It is desired to keep the concentration level of CO2 in the space below 1000 ppm. Assuming complete mixing, determine how many persons could occupy the room and not exceed the desired CO2 level.
Answers
Answer:
404 persons
Explanation:
To get n= number of persons
We use this formula
n = I(Dc - EaC)Eaf
I = 6000 = inflow rate
Dc = desired concentration = 1000
Eac = Exhaled air concentration = 280ppm = 0.00028
Exhaled air flow rate = Eaf = 0.0107
When we put values into the formula above
6000(0.001-0.00028)/0.0107
= 6000(0.00072)/0.0107
= 4.32/0.0107
= 403.7
= 404 persons
sound travels 1,500 m/s through water at 25 degrees celciesunder these conditions how long would it take to travel 300m
Answers
Answer:
[tex]v = s \div t[/tex]
[tex]t = s \div v[/tex]
[tex]t = 300 \div 1500 = 0.2s[/tex]
