Answer:
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1. A sample of a gas is occupying a 500 mL container at a pressure of 1.4 atm and a temperature of 25 °C.
If the temperature is increased to 50 °C and the pressure is increased to 2.7 atm, what is the new
volume?
The new volume of a sample of gas initially occupying a 500 mL container at a pressure of 1.4 atm and a temperature of 25 °C is 281.01mL.
How to calculate volume?The volume of a gas can be calculated using the following formula:
P1V1//T1 = P2V2/T2
Where;
P1 = initial pressureP2 = final pressureV1 = initial volumeV2 = final volumeT1 = initial temperatureT2 = final temperature1.4 × 500/298 = 2.7 × V2/323
2.348 × 323 = 2.7V2
758.72 = 2.7V2
V2 = 281.009mL
Therefore, the new volume of a sample of gas initially occupying a 500 mL container at a pressure of 1.4 atm and a temperature of 25 °C is 281.01mL.
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Please help me by giving me an drawing , it’s urgent !! Or writing explanation but drawing is easier.
Answer:
13 Protons, 14 Neutrons, and 13 electrons.
Explanation:
See Picture Below
I have labeled all the numbers and the diagram.
I hope it helped
Select all correct statements from below. a. Recrystallization is a technique used to purify solid compounds based on solubility differences at different temperatures. b. Toluene is a clear, colorless liquid which becomes a vapor when exposed to air at room temperature. Do not breathe in. Always handle it in the fume hood. c. Filtration is a technique to separate solid from liquid(s). d. There are two different filtration techniques: Gravity Filtration and Vacuum Filtration.
All are correct statements:-
Recrystallization is a technique for purifying solid compounds. Solids tend to dissolve more in hot liquids than in cold liquids. During recrystallization, the impure solid compound is dissolved in a hot liquid until the solution is saturated, after which the liquid is cooled.
Toluene is a clear, colorless liquid that evaporates in the air at room temperature. Toluene smoke has a pungent or sweet odor, which is a sign of exposure. Toluene is typically used as a mixture with other solvents and chemicals such as paint pigments. Inhalation of small doses of toluene vapor can cause mild headaches, dizziness, drowsiness, or nausea.
Filtration is the process of separating an insoluble solid from a liquid. When filtering a mixture of sand and water: the sand remains on the filter paper (it becomes a residue). Water flows through the filter paper (it becomes a filtrate). Gravity filtration and vacuum or suction filtration are the types of filtration.
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Sodium (Na) is a ____
how would the equilibrium change if the temperature were increased in SO2(g)+NO2(g) --> SO3(g) +heat?
Answer:
D. The amount of nitrogen dioxide and sulfur dioxide would increase.
Explanation:
Because the reaction is exothermic, heat is a product. According to Le Chaetelier's Principle, a system in equilibrium will adjust itself so as to relieve any stress placed upon it. If the temperature of the system increases, there are more products, and therefore the system is no longer at equilibrium. Thus, it will shift to favor the reactant side of the equation, where sulfur dioxide and nitrogen dioxide are located. This makes the answer D.
Edit: Brainly thinks that the correct spelling of 'Le Chaetelier' is a bad word so that's why it is spelled wrong lol.
another one. i’m still stuck on these problems pls help lol
Answer:
Not so sure. Hope it helps...
In a titration of 25.0 ML of 0.40m NaOH is used to neutralize 10.0 ML of HCL. Calculate the molarity of the acid.
Answer:
=> 1.0 M
Explanation:
The question is asking us to find the molarity of the acid (HCl).
We have been provided with;
25.0 mL of 0.40 M NaOH10.0 mL of HClWe know that molarity (M) of a solution is contained in 1 L or 1000 mL or 1000 cm³.
This means that;
0.40 M is contained in 1000 mL.
X mol is contained in 25.0 mL
[tex] = \frac{25 \: \times \: 0.40}{1000} \\ = 0.01 \: moles[/tex]
These 0.01 moles is contained in 10 mL of HCl.
To find the molarity of the acid;
0.01 moles is contained in 10 mL
x mol is contained in 1000 mL
[tex]x \: mol \: = \frac{0.01 \times 1000}{10} \\ = 1.0 \: mol[/tex]
= 1.0 M
Therefore the molarity of the acid (HCl) is 1.0 M
Which ionic compound is expected to form from combining the following pairs of elements: a. Barium and fluorine b. Cesium and chlorine c. Lithium and nitrogen d. Aluminum and oxygen
An ionic compound is composed of a cation (generally, a metal ion) and an anion (a nonmetal ion). The cation and the anion combine due to the Coulombic force of attraction to form an ionic lattice. The metal atom releases one or more electrons and the nonmetal receives these electrons until they fulfill their octet.
Ionic compounds are held together by opposite charges but do not have a charge. You have to balance the +’s and -‘s. Ba has a charge of +2 F has a charge of -1 You need 2 F- to balance the +2 of Ba BaF2.
a) BaF2 or barium fluoride
b) CsCl or cesium chloride
c) Li3N or lithium nitride
d) Al2O3 or aluminum oxide
Barium And Fluorine
Please check the attached file for a detailed answer.
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Decide whether each proposed multiplication or division of measurement is possible. If it is possible, write the result in the last column of the table.
Answer:
See attached image.
Explanation:
The explanations are on the attachment. The numerical results are below.
1. 63g/7cm^3 = 9 g/cm^3
2. The m or mm must be converted so that the units are the same. 1 m = 1000 mm. I'll convert the meters to mm: 0.080 m = 80 mm.
480 mm^2/80 mm = 6 mm
3. L times L makes no physical sense, unless this is a new Star Wars technique for making dark matter. Entertaining, but useless.
Increasing technology addiction among the youth write a letter to editor
Answer:
these two would help you
Explanation:
have a good day ᕕ( ᐛ )ᕗ
What is the ratio by mass of these compounds a. 2na+cl2 =2nacl? b.h2o +nao=2naoh? c.hcl+naoh=nacl+h2o?
The ratio of the mass of compounds:
a. 2Na + Cl[tex]_{2}[/tex] → 2NaCl = 46 + 70 → 46 : 70
b. H[tex]_{2}[/tex]O + NaO → 2NaOH = 1 : 8 + 23 : 16 → 23 : 16 : 1
c. HCl + NaOH → NaCl + H[tex]_{2}[/tex]O = 1 : 35 + 23 : 35 → 23 : 35 + 1: 8
What is a molecular mass?
Molecular mass refers to the total sum of the masses of the atoms or components that make up the molecule.
Calculation:
a. 2Na + Cl[tex]_{2}[/tex] → 2NaCl
The atomic mass of Na= 23The atomic mass of Cl= 35(Na x 2) + (Cl x 2) → (Na x 2) : (Cl x 2)
(23 x 2) + (35 x 2) → (23 x 2) : (35 x 2)
46 + 70 → 46 : 70
b. H[tex]_{2}[/tex]O + NaO → 2NaOH
The atomic mass of H = 1The atomic mass of O= 16Atomic mass of Na= 23(H x 2) : (O x 1) + (Na x 1) : (O x 1) → (Na x 2) : (O x 2) : (H x 2)
(1 x 2) : (16 x 1) + (23 x 1) : (16 x 1) → (23 x 2) : (16 x 2) : (1 x 2)
2 : 16 + 23 : 16 → 46 : 32 : 2
1 : 8 + 23 : 16 → 23 : 16 : 1
c. HCl + NaOH → NaCl + H[tex]_{2}[/tex]O
The atomic mass of H= 1The atomic mass of Cl= 35The atomic mass of Na= 23The atomic mass of O= 16(H x 1) : (Cl x 1) + (Na x 1) : (Cl x 1) → (Na x 1) : (Cl x 1): (H x 2) : (O x 1)
(1 x 1) : (35 x 1) + (23 x 1) : (35 x 1) → (23 x 1) : (35 x 1) : (1 x 2) : (16 x 1)
1 : 35 + 23 : 35 → 23: 35 + 2: 16
1 : 35 + 23 : 35 → 23 : 35 + 1: 8
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When a substance is dissolved in water, the properties of the solution will be different from those of the water?
Answer:
yes
Explanation:
boiling point, freezing point, ph , density are just a few that would change
Which bond is the most polar?
Group of answer choices
a)between C and O
b)between Br and Br
c)between C and S
d)between C and Is
Answer:
a between c and o
Explanation:
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If the molar mass of x (hco3) is 162 g/mol, determine the relative atomic mass of x.
The relative atomic mass of x is 101 u.
Molar mass is calculated by adding the atomic mass of all the elements in a compound.
Molar mass of x(HCO₃) =162 g/mol
Atomic mass of H = 1 g/mol
Atomic mass of C =12 g/mol
Atomic mass of O = 16 g/mol
Therefore, molar mass of x(HCO₃) will be
= x + 1 + 12 + 3 x 16
We know that:
x + 1 + 12 + 3 x 16=162
x + 61 = 162
x = 101 g/mol
The relative atomic mass of x will be 101 u.
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What is Chemical Bonding?
Explain please.
Answer:
Chemical bonds are how atoms, and even molecules join together.
Explanation:
There are two main types of primary chemical bonds. While secondary links relate to molecules, primary ties are atom to atom. This answer explains basic primary bonds only.
One must comprehend what a valence shell is before I proceed. The outer electron orbital of an atom is known as the valence shell. Most of the time (except from hydrogen), atoms desire to have 8 electrons in their valence shell, thus they form bonds with other atoms to accomplish this.
All bonds result in a new chemically different molecule. Now, the two types are:
Covalent: When two atoms combine their electrons to fill their valence shells. The atoms are joined together by this "sharing."Ionic: When one atom transfers an electron to another atom in order to fulfill the valence electron requirement. Because electrons have a negative charge, the atom that produced them gains a positive charge as a result of losing its negative charge. The atom that received the electron therefore acquires a negative charge. Because opposing charges attract, it seems sense that the charged atoms bind as a result.Please if anyone can help answer!
1.What is a solvent? give examples.
2.What is a solute? give examples.
3.What factors influence the solubility of a solute in a solvent?
Answer:
1.A solvent is a liquid in which another substance is dissolved to form a solution. Examples of solvents include water, alcohol, and vinegar.
2.A solute is a substance that is dissolved in a solvent to form a solution. Examples of solutes include salt, sugar, and caffeine.
3.Several factors can influence the solubility of a solute in a solvent, including the nature of the solute and solvent, the temperature, and the pressure.
Explanation:
can someone help me with this?
Answer:
I see "photosynthesis" and "cellular respiration". I wonder if photosynthesis has something to do with the sun.
Explanation:
Which is the best reason for choosing the beaker for heating the solution? the beaker is the only container that can withstand high temperatures. the beaker's wide mouth allows the thermometer to rest against the side. the beaker will not tip over when placed on the hot plate. the beaker is unbreakable.
The selection of the beaker for heating the solution:
The best reason for choosing the beaker for heating the solution is "The beaker will not tip over when placed on the hot plate".
What is a Beaker?:
A glass container with a flat bottom and a tiny pouring mouth is known as a beaker. It is employed in the chemistry lab to stir, heat, and mix liquids.Beakers can be heated on a hot plate directly. Because of their flat bottoms, these containers will uniformly distribute heat when the mixture is shaken. It is best to heat indirectly any other container without a flat surface.Borosilicate glass, which is frequently used to make glass beakers, has boron trioxide, which gives it the ability to withstand sharp temperature changes. It can endure temperatures of up to 400°C.
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The element oxygen has a molar mass of 15.999 grams, thus one mole of oxygen is equal to _____ g/mol.
Answer: 15.999 grams.
Explanation: The molar mass of an element is the mass of one mole of that element. You can also solve this with a little bit of math.
[tex]15.999gO*\frac{1molO}{15.999gO} =1molO[/tex]
I hope this helps! Pls mark brainliest!! :)
please help. i’m strugglingggg
Rewrite this measurement with a simpler unit, if possible.
Answer:
m/s
Explanation:
One 'm' and one 's' in the numerator and the denominator 'cancel out' and you are left with m / s
When uranium ionizes and becomes u 238 5 , there are _____ protons, _____ neutrons, and _____ electrons.
The ionized uranium (238 [tex]U^{5+}[/tex]) has 92 protons, 146 neutrons and 87 electrons.
What is Uranium(238) called?The U²³⁸ is a stable isotope of Uranium. It cannot sustain a chain reaction.
The atomic number for uranium is 92 and its atomic mass is 238.
How many protons, electrons and neutrons are there?The atomic number for U²³⁸ is 92.
So, the number of protons or electrons = 92
Then, the number of neutrons = atomic mass - number of protons
⇒ 238 - 92 = 146
How many protons, electrons and neutrons are there in the ionized Uranium?The Uranium is ionized and becomes ²³⁸U⁵⁺.
So,
The number of protons = 92
The number of electrons = 92 - 5 = 87 (Since uranium is ionized by 5+ electrons i.e., removing 5 electrons)
The number of neutrons = atomic mass - number of protons
= 238 - 92 = 146
Thus, when uranium ionizes and becomes ²³⁸U⁵⁺, there are 92 protons, 146 neutrons, and 87 electrons.
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the authors imply that the response of various officials to attempts to measure their countries' carbon stock through field surveys has been
The measurement of the countries' carbon stock through field surveys by has been unhelpful, because the officials don't make their countries' land holdings readily available for study.
What is an inference?An inference can be defined as an act through which a reader can deduce the meaning and message (information) that is associated with certain text in a passage, especially through induction.
In this scenario, we can infer and logically deduce that the author implied that the measurement of the countries' carbon stock through field surveys by has been unhelpful, because the officials don't make their countries' land holdings readily available for study.
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Complete Question:
The authors imply that the response of various officials to attempts to
measure their countries' carbon stock through field surveys has been:
A. unhelpful, because they fear that jobs for their countries' scientists will be lost.
B. helpful, because their countries have invested significantly in technology to allow studies to expand.
C. helpful, because their countries stand to benefit from universal carbon data that the studies will uncover.
D. unhelpful, because they do not make their countries' land holdings readily available for study.
NH4+H2O →NH3+H3O
Which one is acting weaker base?
Answer:
NH3
Explanation:
In solution, they are in equilibrium. NH4+ acts as a bronsted Lowry acid and donates an H to become NH3, and NH3 acts as a bronsted lowry base and accepts an H. In this pair, NH3 is a weak base, which gets its basic character due to the presence of lone pair of nitrogen and its ability to donate it.
PLEASE HELP!! What is the pH of a solution with a [H3O+] concentration of 3.4 x 10-11 M? Is the solution acidic, basic, or neutral?
[tex]\\ \tt\leadsto pH=-log[H^+][/texM
[tex]\\ \tt\leadsto pH=-log[3.4\times 10^{-11}][/tex]
[tex]\\ \tt\leadsto pH=-log3.4-log10^{-11}[/tex]
[tex]\\ \tt\leadsto pH=-0.53+11[/tex]
[tex]\\ \tt\leadsto pH=10.47[/tex]
Basic
Considering the definition of pH, the pH of the solution is 10.47 and since it is higher than 7, it is a basic substance.
Definition of pHpH is the Hydrogen Potential. It is a measure of acidity or alkalinity that indicates the amount of hydrogen ions present in a solution or substance.
Mathematically, pH is calculated as the negative base 10 logarithm of the activity of hydrogen ions:
pH= - log [H⁺]= - log [H₃O⁺]
Numerical scale of pHThe numerical scale that measures the pH of substances includes the numbers from 0 to 14. The pH value 7 corresponds to neutral substances. Acidic substances are those with a pH lower than 7, while basic substances have a pH higher than 7.
pH in this caseIn this case, you know [H₃O⁺]= 3.4×10⁻¹¹ M.
Replacing in the definition of pH:
pH= -log (3.4×10⁻¹¹ M)
Solving:
pH= 10.47
Finally, the pH of the solution is 10.47 and since it is higher than 7, it is a basic substance.
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A 25 kg rock is placed in a graduated cylinder with water.the volume of the fluid is 18.3ml.calculate the density of the rock in g/ml
Answer:
=> 1366.120 g/mL.
Explanation:
To determine the formula to use in solving such a problem, you have to consider what you have been given.
We have;
mass (m) = 25 Kg
Volume (v) = 18.3 mL.
From our question, we are to determine the density (rho) of the rock.
The formula:
[tex]p = \frac{m}{v}[/tex]
First let's convert 25 Kg to g;
1 Kg = 1000 g
25 Kg = ?
[tex]= \frac{25 × 1000}{1}[/tex]
= 25000 g
Substitute the values into the formula:
[tex]p = \frac{25000 g}{18.3 ml}[/tex]
= 1366.120 g/mL.
Therefore, the density (rho) of the rock is 1366.120 g/mL.
Arroyo Books sells new and used books, some long (with many pages) and some short (with fewer pages). Decide
whether each property of their books listed in the table below is extensive or intensive, if you can. If there's not
enough information to decide, check the can't decide box.
The percentage of words in the book which have more than two syllabus: Can't decide. The number of pages in the first chapter is extensive property. The shipping cost of the book (which depend on weight) is extensive property.
What is Intensive Property ?The property which do not depend on the quantity or amount of matter is called Intensive Property. The intensive properties are pressure, temperature, density, concentration, taste, color etc.
What is Extensive Property ?The property which depend upon the amount of matter in a sample is called Extensive property. The extensive properties are mass, volume, heat capacity, weight, length, shape etc.
The percentage of words in the book which have more than two syllabus in this case we cannot decide whether it is extensive property or intensive property.
The number of pages in the first chapter is extensive property because the pages have some mass and mass is extensive property.
The shipping cost of the book (which depend on weight) is extensive property as weight is an extensive property which depend upon the amount of matter.
Thus from the above conclusion we can say that The percentage of words in the book which have more than two syllabus: Can't decide. The number of pages in the first chapter is extensive property. The shipping cost of the book (which depend on weight) is extensive property.
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Pls answer asap i will mark u brainlistl
Answer:
X = 350 kJ/mol
Explanation:
According to the question:
Energy needed when breaking bonds + 1640 kJ/mol = Energy released when forming bonds
∴ 2 (C - C) + 8 (C - H) + 5 (O = O) + 1640 = 6(C = O) + 8(O - H)
⇒ 2 (X) + 8 (410) + 5 (500) + 1640 = 6 (740) + 8 (460)
⇒ 2X + 7420 = 8120
⇒ 2X = 700
⇒ X = 350 kJ/mol
Please help me thank you!
The difference in the electronegativity of the Y-P bond is 0.97.
What is electronegativity?The term electronegativity has to do with the difference between the ability of two atoms in a bond to attract the shared electrons of the bond towards themselves.
The electronegativity value of Y is 1.22 while the electronegativity value of P is 2.19.
Hence;
ΔEN = 2.19 - 1.22
ΔEN = 0.97
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what could you do to increase the electrical force between two charged particles by a factor of 16
Increasing one charged particle by 16 will lead to increasing the electrical force between two charged particles by a factor of 16.
What is Electrical force?This is referred the attractive or repulsive interaction between any two charged bodies present.
F= kq1q2/r²
F1/F2= kq1q2/r² / 16kq1q2/r²
F1/F2 = 1/16
F2 = 16F1
This is therefore how to increase the electrical force between two charged particles by a factor of 16.
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Acetic acid (which is commonly known as vinegar) has a ph of 4.8. what is the hydronium ion (h3o ) concentration of the acetic acid?
Concentration of Hydronium ions in the Acetic acid is [tex]1.58\times10^{-5}[/tex]
Calculation of concentration of acid:
pH of a solution is defined by the concentration of Hydronium ions in the solution.
Also, pH is defined as the negative of logarithm of [tex]log[H^+][/tex]
[tex]pH= -log[H^+][/tex]
pH of Acetic acid= 4.8
Therefore,
[tex]4.8= -log[H^+][/tex]
Taking antilog, we get
[tex][H^+] = 0.0000158M= 1.58\times10^{-5}M[/tex]
The Hydronium concentration of the acetic acid is [tex]1.58\times 10^{-5}[/tex]M.
As Acetic acid is a weak acid which means that ionization of acid is not complete, ie. 100%
That is why the concentration of Hydronium ions are less in the solution.
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