Answer:
6.75 sym.
Explanation:
Boyle's Law: The pressure of a gas in an enclosed container with a flexible volume is inversely proportional to the volume occupied by the gas.
Empirically => P ∝ 1/V => P = k(1/V) => k = P·V
For any conditions of Pressure & Volume, Pressure x Volume is a constant.
Therefore, k₁ = k₂ => P₁V₁ = P₂V₂ => V₂ = P₁V₁ / V₂
=> V₂ = (3atm)(0.450L)/(0.200L) = 6.75 atm.
why can lime juice remove rust stain
Answer:
El limon por su alto contenido en ácido cítrico, actúa como un excelente limpiador natural debido a su bajo pH y propiedades antibacterianas. A parte de todas estas propiedades, los limones huelen muy bien y es una rareza que pudiesen manchar o dañar algún material de la casa.
Explanation:
Answer:
It's the citric acid reacting to the iron oxide -which is basically the rust- it dissolves.
Explanation:
How many flourine atoms are present in 5.3 grams of flourine sample? (note that you have to use the 3 step method)
Answer:
1.7x10²³ Fluorine atoms are present
Explanation:
To solve this question we must know that, to find the amount of atoms of a substance from its mass, we have, as first, to convert this mass to moles using molar mass of the substance. With the moles we can find the amount of molecules using Avogadro's number. And with the formula we can know the atoms presents:
Moles Fluorine (F₂, Molar mass: 37.997g/mol)
5.3g * (1mol / 37.997g) = 0.139 moles F₂
Molecules F₂:
0.139 moles F₂ * (6.022x10²³molecules / mol) = 8.4x10²² molecules F₂
As 1 molecule of F₂ contains 2 atoms of Fluorine:
8.4x10²² molecules F₂ * 2 =
1.7x10²³ Fluorine atoms are presentWhich of these is not a characteristic of sponges?
lack a backbone
lack a brain
stationary
have a nervous system
Air is made of nitrogen, carbon dioxide, and small amounts of other gases. What is the pressure of O₂, total is 1 atm if PN₂ = 593.4 mm Hg, PCO₂ = 3.0 mm Hg, and Pothers = 7.1 mm Hg? *
0.3 atm
0.2 atm
0.4 atm
0.8 atm
Answer:
The pressure of O₂ is 0.8 atm.
Explanation:
The pressure exerted by a particular gas in a mixture is known as its partial pressure. So, Dalton's law states that the total pressure of a gas mixture is equal to the sum of the pressures that each gas would exert if it were alone:
PT = PA + PB
This relationship is due to the assumption that there are no attractive forces between the gases.
In this case:
PT=Pnitrogen + Pcarbon dioxide + Pother gases
Being:
Pnitrogen: 593.4 mmHg Pcarbon dioxide: 3 mmHgPother gases: 7.1 mmHgand replacing:
PT= 593.4 mmHg + 3 mmHg + 7.1 mmHg
you get:
PT= 603.5 mmHg
Being 760 mmHg= 1 atm, you get:
PT= 603.5 mmHg= 0.8 atm
The pressure of O₂ is 0.8 atm.
A compound has an empirical formula of CH20. What is its molecular formula, if its molar mass is 360 g/mol?
a. C6H12O6
b. C12H24O12
Answer:
a
Explanation:
A actual molecule of glucose contains six carbon atoms, twelve hydrogen atoms, and six oxygen atoms.
Answer:
B.
Explanation:
How many formula units are there in 7.55 moles potassium chloride?
Answer:
mole is equal to 1 moles Potassium Chloride, or 74.5513 grams.
Which of the following can be classified as a good conductor of thermal energy?
plastic
wood
rubber
copper
what is a balanced chemical equation in chemistry
name any two
chemical fertilizers rich in potassium
Explanation:
Fertilizers are chemically synthesized plant nutrients.
Nitrogen (N), Phosphorus (P) and Potassium (K) are macronutrients and are required in large amounts by plants. So, farmers use fertilizers in order to supply these nutrients. NPK 15:15:15 , NPK 20:20:20, NPK 15:30:15 are examples of fertilizers used to supply N, P, K to crops.
Explanation:
1.Potassium Nitrate(KNO3)
2.Potassium Sulphate(K2SO4)
They provide potassium to plants for making their roots and shoots healthy.
WILL GIVE BRAINLIEST PLEASE HELPP!!!
Answer:
I think C...................
(4x972)+(76.4x29.3)-(12x7)
solve using significant figures please ASAP
Trihydrogen monophosphide is a covalent molecule that can also act as an acid. What is the correct acid name for trihydrogen monophosphide ?
Answer:
H₃P phosphidic acid
Explanation:
The Trihydrogen monophosphide, as stated in the exercise, can act as an acid. This is pretty similar to the case of hydrogen chloride, which is a gas but it can also be an acid, in this case, chloridic acid.
In the case of trihydrogen phosphide, we can write it molecular formula which is:
H₃P
Now, this is a binary compound because its composed of only two elements, in this case, hydrogen and phosphide. To name binary acid, we need to name the non metal with the sufije idic, and then, the word acid.
Following this simple rule, the trihydrogen phosphide would be, as acid:
H₃P: phosphidic acid
Hope this helps
Cuántos gramos de cloruro de magnesio se pueden obtener si se hacen reaccionar 354,9g de cloruro de titanio (IV) y 285g de magnesio puro, Recuerde que como productos obtiene titanio y cloruro de magnesio.
a. escriba la ecuación balanceada
b. determine el reactivo limite
c. La cantidad de reactivo en exceso
Answer:
sorry I dont speak Spanish
Can someone please write this in y’all’s own words please and I’ll give you branly
Answer: we can make our own water and not take any water from animal.
Explanation:
Which contains more carbon 4.71 g of C6H12O6 or 5.85 g C2H6O?
Answer:
5.85 g C2H6O has more carbon
Explanation:
Weight of carbon in 4.71 g of C6H12O6
[tex]4.71 * 12.01\\56.5671\\[/tex] grams
Weight of carbon in 5.85 g of C2H6O
[tex]5.85 * 12.01\\70.259\\[/tex] grams
Hence, 5.85 g C2H6O has more carbon
Will give lots of points if answered correctly. Determine the kb for chloroform when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.
Answer: The value of [tex]K_{b}[/tex] for chloroform is [tex]3.62^{o}C/m[/tex] when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.
Explanation:
Given: Moles of solute = 0.793 mol
Mass of solvent = 0.758
[tex]\Delta T_{b} = 3.80^{o}C[/tex]
As molality is the number of moles of solute present in kg of solvent. Hence, molality of given solution is calculated as follows.
[tex]Molality = \frac{no. of moles}{mass of solvent (in kg)}\\= \frac{0.793 mol}{0.758 kg}\\= 1.05 m[/tex]
Now, the values of [tex]K_b[/tex] is calculated as follows.
[tex]\Delta T_{b} = i\times K_{b} \times m[/tex]
where,
i = Van't Hoff factor = 1 (for chloroform)
m = molality
[tex]K_{b}[/tex] = molal boiling point elevation constant
Substitute the values into above formula as follows.
[tex]\Delta T_{b} = i\times K_{b} \times m\\3.80^{o}C = 1 \times K_{b} \times 1.05 m\\K_{b} = 3.62^{o}C/m[/tex]
Thus, we can conclude that the value of [tex]K_{b}[/tex] for chloroform is [tex]3.62^{o}C/m[/tex] when 0.793 moles of solute in 0.758 kg changes the boiling point by 3.80 °C.
Why do you think some people prefer genetically modified food?
In order to expand agriculture and urban areas to meet increased demand for growing populations, water supplies often have to be diverted. In three to five sentences, construct a potential chain of consequences for what could happen when water is diverted from large bodies like lakes and rivers
Answer:
Decrease occur in the amount and flow of water bodies.
Explanation:
There is decrease in the amount and flow of water from water bodies such as rivers and lakes etc occur when the river is diverted from large water bodies because the water flows to the diverted sides and decrease occurs in the amount of water in the rivers and lakes. Those regions from where this river passes can also be negatively affected due to low amount of water they receives for their daily needs or for cultivation of crops so we can say that this diversion has adverse effect on other populations.
The reaction a(g)⇌b(g) has an equilibrium constant of 5.8 and under certain conditions has q = 336. part a what can you conclude about the sign of δg∘rxn and δgrxn for this reaction under these conditions?
Answer:
The answer is "As [tex]Q=336[/tex], at high-temperature [tex]\Delta G_{rxn}>0[/tex] and When[tex]K>1,[/tex][tex]\Delta G^{\circ}_{rxn}>0[/tex]."
Explanation:
The equation for the reaction is:
[tex]A(g) \leftrightharpoons B(g)[/tex]
[tex]K=5.8\\\\Q=336[/tex]
At equilibrium,
[tex]\Delta G^{\circ}_{rxn}>0[/tex][tex]=-RT \ln \ K[/tex]
When k=5.8(>1), the value of [tex]\ln k[/tex] would be positive
So, [tex]\Delta G^{\circ}_{rxn}[/tex] is negative (< 0)
So if K > l, [tex]\Delta G^{\circ}_{rxn}<0[/tex]
If the reaction is not in equilibrium so the equation is :
[tex]\Delta G_{rxn}>0[/tex]=[tex]\Delta G^{\circ}_{rxn}[/tex][tex]+RT \ln Q[/tex]
Substituting the expression:
[tex]\Delta G_{rxn}>0[/tex][tex]= (-RT \ln K) + RT \ln Q[/tex]
[tex]= RT(\ln Q- \ln K)\\= RT(\ln (336)-\ln (5.8))\\= RT(4.06)[/tex]
It is the positive value for all temperatures.
So, As Q = 336, at the high temperature [tex]\Delta G_{rxn}>0[/tex].
A 2.76 g ingot of silver metal absorbs 78 J of energy. What is the final temperature of the metal if it is initially at 47 C?
Answer:
The initial temperature of the ... What is the specific heat capacity of silver metal if 55.00 g of the metal.
Explanation:
The first medical encyclopedia was written by an Arab scholar. Please select the best answer from the choices provided T F
Answer:
True
Explanation:
Asclepius known as the God of medicine, it is said to be healing in ancient Greek religion thag stands for thd healing aspect of the medical arts.
Medical encyclopedia is referred to as a general reference information that is used as sorting out medical related issues. It is a compilation of well written book or document that consists lf information that are related to diseases, medical cases, different tests, symptoms of the ailments, injuries, surgeries etc. and the documents have an a well broad photos of medicine-related photographs and others.
Answer:
T
Explanation:
Make up a short story to explain jays speed and acceleration change throughout his walk. Make sure to address parts A-D
Answer:
Speed of jays increases first, again increases, decreases and then increases.
Explanation:
The speed of jays increases while moving from rest to point A and no acceleration due to constant speed. From point A to point B, the speed is continues to increase and no acceleration. From point B to point C, the speed of jays decreases and acceleration is produced in the journey due to change of speed and from point C to point D, the speed of jays again increases and acceleration is produced due to increasing the speed.
Answer:
The speed of jay's walk increases first, again increases, then it decreases and then increases due to his acceleration walk during parts A-D.
Explanation:
An _______________________ (device that converts electrical energy into kinetic energy) runs by using the magnetic field formed by a ______________________________ formed into a loop.
Answer:
A motor (device that converts electrical energy into kinetic energy) runs by using the magnetic field formed by a flowing current formed into a loop.
Which of the following represents an alpha particle?
O A. je
B. He
O C. Y
O D.B
Answer:
Alpha particle- B. He (Helium 4 atom )
He represents an alpha particle and the correct option is option B.
What is an alpha particle?Alpha particles are alternatively known as Alpha radiation or Alpha rays. It is a positively charged particle emitted from the decay of various radioactive materials.
They are emitted from the nucleus of some radionuclides during a form of radioactive decay, called alpha-decay.
Alpha particle mass is due to the two protons and two neutrons bonding.
An alpha-particle is identical to the nucleus of a normal (atomic mass four) helium atom i.e. a doubly ionised helium atom.
Therefore, He represents an alpha particle and the correct option is option B.
Learn more about Alpha particles, here:
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When the medium is uniform, how do light waves travel through it? vibrating motion circular motion irregular motion straight line motion
Answer:
straight line
Explanation:
Answer:
All K12 ppl say yeye
Explanation:
What is the relationship of tissues to cells?
Tissues make cells.
Cells make up tissues.
Tissues are use for cell growth.
Cells help tissue grow.
State of Matter
Can someone help me ?
Answer:
HBrO forms hydrogen bonds with each other and with water
Acetic acid forms hydrogen bonds with each other and with water
Formaldehyde can't form hydrogen bonds to each other but do form hydrogen bonds with water.
Explanation:
The hypohalous acids are polar molecules hence they form intermolecular hydrogen bonds. They also form hydrogen bonds with water. This enables it to dissolve in water.
Acetic acid can form dimmers with each other due to hydrogen bond formation. Also, acetic acid is capable of forming hydrogen bonds with water. This enables acetic acid to dissolve in water.
Aldehydes do not form intermolecular hydrogen bonds with each other because there is no hydrogen atom attached directly to oxygen in aldehydes. As such, they can only form hydrogen bonds with water. This accounts for the water solubility of low molecular weight aldehydes. Hence, formaldehyde can't form hydrogen bonds to each other but do form hydrogen bonds with water.
You are allowed to change the number of molecules of each substance by adding coefficients in front of the formulas
Answer:
Yeah, it allowed according to the basics of chemistry.
If the scientist measured the mass of the copper cube after it had been in the furnace for one hour what would the cube’s mass probably be? Explain your answer
how many formula units are present in 0.354 moles of copper (III) chloride, CuCl2
Answer:
47.596008
Explanation: