Answer:
a. Gases ideales: relación entre todas las variables que influyen sobre los gases
Explanation:
La ecuación del gas ideal da la relación entre las variables; presión, volumen, temperatura y número de moles.
Según la ecuación del gas ideal; PV = nRT
P = presión del gas
V = volumen del gas
n = Número de moles del gas
R = constante de gas
T = temperatura del gas
El número de moles de SO2 se obtiene de;
n = PV / RT
n = 0,5 * 25 / 0,082 * 373
n = 12,5 / 30,586
n = 0,41 moles
Write the name of flame used In charcoal cavity test.why?
Answer:
the reducing flame also called the carburizing flame.
Explanation:
because it gets the oxides of the unknown salts
Ethanol, C2H5OH, reacts with phosphorus trichloride, PC13:
3C2H5OH(aq) + PC13(aq) - 3C2H5C1 (g) + H3PO3(aq)
Which is the actual mass of chloroethane, C2H5CI, produced if 138.0 g of ethanol is
consumed in excess phosphorus trichloride? The percentage yield for this reaction is
93.00 %.
Answer:
no
Explanation:
no
4.How element gold is different from oxygen?
Answer:
Gold is a metal, more specifically a transition metal, whereas Oxygen is a nonmetal, more specifically a reactive nonmetal. Using this information, you can compare and contrast metals, nonmetals, and metalloids.
Metals are:
Shiny
High melting point
Mostly silver or gray in color
Mostly solids at room temperature – Mercury (Hg) is a liquid at room temperature
Malleable – able to be hammered into a thin sheet
Ductile – able to be drawn/pulled into a wire
Good conductors of heat and electricity
Nonmetals are:
Dull
Low melting point
Brittle – break easily
Not malleable
Not ductile
Poor conductors of heat and electricity
Metalloids are:
Found on the “zig-zag” line on the Periodic Table of Elements
Have properties of both metals and nonmetals
Can be shiny or dull
Semiconductors – able to conduct electricity under certain conditions
Explanation:
Reccomend this site for questions llike these: https://ptable.com/#Properties
help, please. balance these equations by writing the proper coefficients in the blanks provided.
1. _____Mg + _____O2 --> _____ MgO
2. _____P + _____O2 --> _____ P2O5
3. _____S + _____O2 ---> _____SO2
4. _____Na + _____Cl --> _____NaCl
5. _____CaCO3 --> _____CaO + _____CO2
thank you :)
Answer:
1. 2,1,2
2. 4, 5, 2
3. 1,1,1
4. 1, 1, 1
5. 1, 1, 1
Hope this helps!
what is wind in more than 15 words?
Answer:
Wind is Air in a natural motion, as that moving horizontally at any velocity along the earth's surface.
Which is the molar mass of BF3?
10.81 g/mol
29.81 g/mol
48.81 g/mol
67.81 g/mol
Answer: The molar mass of [tex]BF_3[/tex] is 67.81 g/mol
Explanation:
Molar mass is defined as the mass in grams of 1 mole of a substance.
S.I Unit of Molar mass is gram per mole and it is represented as g/mol.
Atomic Mass of Boron (B) = 10.81 g
Atomic Mass of Flourine (F) = 18.99 g
Molecular mass of [tex]BF_3[/tex] = 1 (10.81)+3(18.99) g = 67.81 g
Thus molar mass of [tex]BF_3[/tex] is 67.81 g/mol
What are some of the ethical issues of editing human DNA? Cite examples from the text to defend your answer.
Answer:
one would be if the human had no say in it
The most controversial ethical issue surrounding modifying human DNA is, according to the text, is that it will lead to the creation of designer children with improvements in intelligence or physical performance.
What is DNA?Humans and nearly all other species carry their genetic information in DNA, also known as deoxyribonucleic acid.
The DNA of an individual can be found in almost all of their cells.
The majority of DNA is found in the cell nucleus (where it is known as nuclear DNA), but there is also a small quantity of DNA in the mitochondria (where it is called mitochondrial DNA or mtDNA).
Other ethical issues include the possibility of an identity crisis for a person born with genes from three different people as well as the danger of making mistakes in the human genome that could lead to the spread of genetic illnesses in the population.
Thus, it can be concluded that there are various ethical issues of editing human DNA.
To know more about, DNA refer to the below link:
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Your question is incomplete, but most probably the complete question was,
Read Proposed Treatment to Fix Genetic Diseases Raises Ethical Issues, By Rob Stein, NPR's Morning Edition, 2013
What are some of the ethical issues of editing human DNA? Cite examples from the text to defend your answer.
what will happen if fossil fuels don't exist??
Answer:
When fossil fuels are no longer available—especially if it happens abruptly, which it potentially will—we're going to see patients dying in hospitals and healthcare facilities due to electricity failure, and this will be particularly acute during natural disasters.”
Answer:
we wouldn't have cars
Explanation:
The number of protons is equal to
a the number of neutrons.
b the atomic mass.
c the number of electrons.
d the atomic number.
Answer:
c the number of electrons
Please help me with this
Give one example of
a) Homogeneous mixture of two elements
Answer:
honey
Coffee
blood
Explanation:
These components are uniformly distrubuted and these cannot be seperated unlike heterogeneous
what element is used in bicycles?
Answer: It wasn't that long ago that frames were made out of cast iron or even wood. Today bicycles are made out of exotic materials such as titanium, aluminum, and carbon fiber. Bicycle frames in the 1990s are lighter and stronger than ever before. A racing bicycle frame with parts of the frameset indicated.
Explanation:
Bicycles are now made of exotic materials like titanium, aluminum, and carbon fiber. Bicycle frames are lighter and stronger than ever before in the 1990s.
What metal is used to make bicycles?Steel is the most common material used in bike frames. Carbon or high-tensile steel is a good, strong, and long-lasting steel, but it isn't as light as its more advanced sibling, chromoly steel.
So we've established that the bike has mass and occupies space, and thus the bicycle is matter.
Some bicycles are constructed from titanium or scandium-aluminum alloyed metals. Some bicycles have a steel alloyed frame.
Thus, Recycling yields aluminum, iron (and steel), magnesium, titanium, zinc, and silica (from glass). Bicycles are now made of exotic materials like titanium, aluminum, and carbon fiber.
To learn more about bicycle, follow the link;
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??? Ipc helppp pllzz
What is the Hsol for KF →K+ + F-? The lattice energy is –784 kJ/mol, the enthalpy of hydration for Ki is –336
kJ/mol, and the enthalpy of hydration for F-is-431 kJ/mol. Use AHsol= - Hiat + Hydr
0-879 kJ/mol
0 -17 kJ/mol
O 17 kJ/mol
O 1,551 kJ/mol
Answer:
17 kJ/mol
Explanation:
got it on edge
What does it mean to be limiting or excess? (Limiting Reactant)
Answer:
Find the limiting reagent by calculating and comparing the amount of product each reactant will produce. Balance the chemical equation for the chemical reaction. The reactant that produces a lesser amount of product is the limiting reagent. The reactant that produces a larger amount of product is the excess reagent.
Explanation:
Calculate the number of atoms
in 10.0g of He.
A. 3.83 x 1023
B. 2.41 X 1024
C. 1.51 X 1024
D. 6.02 x 1023
Which of these boxes will not accelerate?
Answer:
B as all the forces cancel out
Explanation:
20-20=0
25-25=0
Silver nitrate reacts with iron (III) chloride to produce silver chloride and iron (III) nitrate. In a particular experiment, a solution containing 25.0 g of silver nitrate is completely reacted. Write the balanced chemical equation for the reaction and determine how many grams of iron (III) nitrate were formed.
Explanation:
Silver nitrate + iron (III) chloride --> silver chloride + iron (III) nitrate
The balanced chemical equation is given as;
2FeCl3 + 3Pb(NO3)2 → 2Fe(NO3)3 + 3PbCl2
Mass of Pb(NO3)2 = 25g
How many grams of iron (III) nitrate were formed?
From the equation;
3 mol of Pb(NO3)2 produces 2 mol of Fe(NO3)3
Converting to mass using;
Mass = Number of moles * Molar mass
Pb(NO3)2;
Mass = 3 mol * 331.2 g/mol
Mass = 993.6 g
Fe(NO3)3;
Mass = 2 mol * 241.86 g/mol
Mass = 483.72 g
This means 993.6 g produces 483.72 g
We have;
993.6 g = 483.72 g
25 g = x
solving for x;
x = 25 * 483.72 / 993.6
x = 12.1709 g of iron (III) nitrate
Help for extra points & brainlest !
Answer: i think is true
Explanation:
True. Cells have jobs in your body as they have functions to do.
Using the chemical formulae alone, how can you differentiate between Type I Ionic, Type II Ionic, Type III Ionic, and Covalent compounds?
Explanation:
Type I
These are compounds in which the cation (metal ion) has a fixed charge.
Examples are;
MgO. NaCl
Type II
These are ionic compounds in which the cation (metal ion) has a variable charge.
Examples are;
FeCl3, PbS2
Type III
These are covalent molecules with no cation.
Examples are;
SO3, N2O5
A student mixes aqueous solutions of NISO4 and NaOH. What will be the correct formula of the precipitate that is formed
The correct formula of the precipitate that is formed is Na₂SO₄ + Ni(OH)₂.
What is a precipitate?The solid substance, that is present at the bottom of the liquid, is insoluble in liquid.
The precipitate formed in reacting the nickel sulfate and sodium hydroxide is sodium sulfate and nickel hydroxide.
The formation of precipitate caused by the compound is called precipitant.
Thus, the correct formula for precipitate is Na₂SO₄ + Ni(OH)₂.
Learn more about a precipitate
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I need help :/
:) :) :)
Answer: I want to say 1
Explanation:
I think
Q4
Which of the following is an example of nonpoint source pollution?
A. industrial effluent
B. Agricultural runoff
C. illegal dumping of waste
D. Oil leaking from your car
Answer:
Option C.
Ilegal dumping of waste
Explanation:
This is because non point source of pollution refers to source of pollution that are many and not directly one which is illegal or does not meet the legal term. This type of pollution does not have a point source, it has many sources and this type of pollution is cause by rainfall or precipitation. Where when the rain fall, it wash away the waste through to water bodies, causing pollution and endangering water bodies.
if common names does not exist how would be the world of organic compounds
Explanation:
I think the question is not complete
Plz answer question! Due Today!!! Question is in picture! Will make BRAINLIEST for first correct answer!!! No links plz!
Answer:
I'd Go. B. weigh everything, let the reaction happen, then weigh everything again.
which of the following is not found in cytoplasm
A.water
B.carbohydrates
C.salt
D.vitamins
Answer:
B is the right answer
carbohydrates are not found inside the cytoplasm so therefore it is B
Answer:
D
Explanation:
The cytoplasm is composed of water, salt and some organic molecules. (e.g. carbohydrates)
What type of reaction does this investigation demonstrate, and as time progresses what will happen to the mass reading on
the scale?
O A. This is a synthesis reaction and the mass reading will decrease as time progresses.
OB. This is a decomposition reaction and the mass reading will stay the same as time progresses,
C. This is a synthesis reaction and the mass reading will stay the same as time progresses,
D. This is a decomposition reaction and the mass reading will decrease as time progresses,
Answer:
B. This is a decomposition reaction and the mass reading will stay the same as time progresses,
Explanation:
Decomposition reactions are when one reactant decomposes (breaks down) into two or more products. They follow the general form of:
AB --> A + B
The law of conservation of mass tells us that when a chemical reaction takes place, no mass is created or destroyed but transforms from one form to another. You can see from the diagram that you have the same number and type of atoms on each side of the reaction.
Answer:
B
Explanation:
Kidneys remove what kind of waste from the body? A. Undigested food B. Carbon dioxide C. Oxygen D. Nitrogen waste
Answer:
Option D: nitrogen waste
Explanation:
Excretion.
This is removal from of waste products of chemical reactions. It involves the eliminating excess water and salts taken in with our human diet and also spent hormones
Nitrogenous waste products are the human waste products which contain nitrogen and are poisonous to the body.
The kidneys is responsible for the remove of Nitrogenous waste, water, salts, toxins, hormones e. t. c. It is the are the main principle excretory organs. They maintain the constant concentration of materials in the body.
Can someone help, please...?
I really can't understand this...
When cobalt(II) chloride is allowed to react with sodium hydroxide, the resulting
products are cobalt(II) hydroxide and sodium chloride. Determine the mass of
cobalt(II) chloride required to completely react with 114g of sodium hydroxide.
Answer:
Reaction CoCl2 + 2 NaOH -> Co(OH)2 + 2 NaOH
You need to count number of moles of NaOH
Amount of mole is n = m/M = 114 g / 39.998 g/mol = 28,5 mol (about)
Amount of CoCl2 is half from that
Calculate molar mass of CoCl2 and multiply it by 28,5 mol
Explanation: