Answer:
CH3NH3Pbl3
Explanation:
is an example of a perovskite th that would be used in a perovskite solar cell
Holide Perovskite
What is equal to equivalent volume of hydrogen (NC)?
Calculate the equivalent weight of the metal if 0.28 L of
hydrogen (NC) was consumed to reduce 1.017 g of its oxide.
According to the question, Equivalent volume of any gas at STP is 22.4 litre. So, Equivalent volume of hydrogen, will be 22.4 litre. Equivalent wt. of metal= 0.025gm
What is the purpose of hydrogen?Hydrogen may be utilized to heat our dwellings and places of business in addition to powering vehicles and producing electricity. To reach net zero, it will be crucial to reduce our carbon emissions significantly.
Where can you find hydrogen?The majority of stars and the sun include it, and the planetary Jupiter is primarily made of it. Less than consistent with similar per million per volume is all that is found when it is a gas present in the air.
Equivalent wt. of metal/Weight of metal =moles of [tex]H_{2}[/tex] ×valency factor
Equivalent wt. of metal/ 1.017 g = (0.28 L/22.4 L) ×2
Equivalent wt. of metal= 0.025gm
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which type of particles make up the lattice in a)ionic compounds b) molecular compounds
Answer: a) ions and b) ions
Explanation:
which sector is targeted for the application of hydrogen fuel cells
The power sector is targeted for the application of hydrogen fuel cells.
What is Hydrogen fuel?This type of fuel produces electricity through the combination of hydrogen and oxygen atoms. The hydrogen reacts with oxygen across an electrochemical cell and produces electricity, water, and heat in a very small quantity.
Hydrogen-powered fuel cell electric vehicles doesn't have any carbon emission or greenhouse gases such as carbon dioxide etc which depletes the ozone layer and causes global warming.
It emit none of these harmful substance and only emits water and warm air which makes it a very clean fuel thereby causing a reduction in pollution and reducing the risk of respiratory diseases.
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Concentration of 20cm³ of sulphuric acid that neutralize 25cm³ of 0.100M of KOH
Concentration of 20cm³ of sulphuric acid that neutralize 25cm³ of 0.100M of KOH, basically is NaOH. 2NaOH + H2SO4 → Na2SO4 + H2O.
What is sulphuric acid?
Sulfuric acid, also known as H2SO4, is a mineral acid. Mattling acid and Oil of vitriol are other names for sulfuric acid. It is basically corrosive and has a strong acidic nature. It acts as an oxidising and dehydrating agent at higher concentrations. It is a syrupy liquid with no odour and no colour.Sulphuric acid is extremely acidic. As a result, it is used in the cleaning of metals, the removal of impurities from oil, the manufacture of chemicals - nitric acid, hydrochloric acid, the synthesis of dye, drugs, detergents, explosives, and so on.Sulfuric acid (CASRN 7664-93-9), also known as hydrogen sulphate, is a strong mineral acid with the formula H2SO4 that is highly corrosive, clear, colourless, and odourless.Sulfuric acid (H2S04) is a corrosive chemical that is harmful to the skin, eyes, teeth, and lungs. Severe exposure can be fatal. Sulfuric acid exposure may cause harm to workers.To learn more about sulphuric acid refers to:
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An unknown gas effuses at a rate 1.50 times the rate of COCl₂. What is the molar mass of the unknown gas?
Answer:
The molar mass of an unknown gas can be determined using the concept of effusion. Effusion is the process of a gas passing through a small hole or porous partition. The rate of effusion of a gas is inversely proportional to the square root of its molar mass. This relationship is described by the Graham's law of effusion.
Explanation:
Graham's law of effusion states that the rate of effusion of a gas is inversely proportional to the square root of its molar mass.
R = k √M
Where R is the rate of effusion, k is a constant, and M is the molar mass of the gas.
If we know the rate of effusion of COCl2 and the rate of effusion of an unknown gas and we know that the unknown gas effuses at a rate 1.5 times the rate of COCl2.
R unknown = 1.5 * R COCl2
We can use this information to find the molar mass of the unknown gas.
M = (R COCl2 / (1.5 * R unknown) )²
If we know the molar mass of COCl2, we can substitute it in the equation and solve for the molar mass of the unknown gas.
It's worth noting that this problem requires you to know the molar mass of COCl2 which is not provided in the question. And also it's important to know that the values of the constant k in the equation for the different gases are not the same, so you need to use the same gas as reference.
A certain ore is 21.3% nickel by mass. How many kilograms of this ore would you need to dig up to have 20.0 g of nickel?
If a certain ore is 21.3% nickel by mass. The number of kilograms of this ore would you need to dig up to have 20.0 g of nickel is: 93.897 kg.
How to find the mass of ore?Using this formula to determine the mass of ore
Mass of ore = Mass of nickel / Percentage of nickel by mass
Convert the percentage to decimal form by dividing it by 100
0.213 = 21.3%.
So,
Mass of ore = (20.0 g) / (0.213)
Mass of ore = 93.897 kg
Therefore the mass of ore is 93.897 kg.
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MAKE NOTES ON METHOD OF MIXTURES ELECTRICAL METHOD.
The Method of Mixtures Electrical Method is a method used to determine the electrical conductivity of a material.
What is Electrical Method?The Electrical Method is a geophysical prospecting technique that uses electrical resistivity to map subsurface features, such as geological structures, fractures, and mineral deposits.
It involves measuring the amount of current that passes through a mixture of two materials under the application of a known voltage. The electrical conductivity of each material can then be determined by calculating the ratio of the current to the applied voltage. The electrical conductivity obtained from the Method of Mixtures Electrical Method can be used to characterize materials such as semiconductors and insulators.
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hydrogen and oxygen reacts chemically to form water. how much water would form if 14.8 grams of hydrogen reacted with 34.8 grams of oxygen
The mass of water that can be obtained is 2.2 g of water.
What is the mass of the water?We know that in the case that we have here, we are going to depend on the stoichiometry of the reaction and this is very important in the determination of the amount of the water that can be formed.
Now we can see that the reaction equation can be written from the fact that; [tex]2H_{2} (g) + O_{2} (g) ---- > 2H_{2} O(g)[/tex]. Then we can see that in this kind of chemical reaction we have to apply the stoichiometry.
Number of moles of the hydrogen = 14.8g/2 g/mol = 7.4 moles
Number of moles of oxygen = 34.8 g/32 g/mol = 1.1 moles
Given that 2 moles of hydrogen reacts with 1 mole of oxygen
7.4 moles of hydrogen reacts with 7.4 * 1/2
= 3.7 moles
Hence oxygen is the limiting reactant.
1 mole of oxygen produces 2 moles of water
1.1 moles of oxygen would produce 1.1 * 2/1
= 2.2 moles of water
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how we compare an anion and cation
Answer:
Explanation:
An anion is a negatively charged ion, meaning it has gained one or more electrons. A cation is a positively charged ion, meaning it has lost one or more electrons. The charge of an ion can be determined by its atomic number, the number of protons it contains, and the number of electrons it contains. An anion will have more electrons than protons and a cation will have more protons than electrons. An anion will be attracted to positive charges, while a cation will be attracted to negative charges. Anions and cations can also be compared based on their size and shape. Anions are typically larger than cations, and they often have a spherical shape. Cations, on the other hand, are typically smaller and have a more angular shape.
HELP ASAP PLS PLS PLS 100 POINTS, BRAINLY IF CORRECT
For the Haber process, N2 + 3H2→2NH3, which is the mole ratio of NH3 to H2.
Question 1 options:
2:3
1:3
1:2
3:2
It says 3:2 is wrong so I need different answer pls pls pls.
Answer: 2:3
Explanation: The question is phrased annoyingly. NH3 to H2 means we need to keep our numbers correct.
2NH3 -> 2 mol of NH3.
3H2 -> 3 mol H2.
NH3/H2 = NH3 to H2.
2:3.
2 mol NH3
----------------
3 mol H2.
2:3, not 3:2.
When gaseous hydrogen sulfide and carbon dioxide interact, water vapor and carbon disulfide CS₂ (g) are formed.
Write the thermochemical equation for this reaction by calculating its thermal effect.
The thermochemical equation for this reaction by calculating its thermal effect is H₂S +CO₂ = CS₂ + water vapor.
What is a thermochemical reaction?Thermochemical equations are balanced chemical equations that contain all reactants and products' physical states as well as the energy change. The reaction is endothermic when energy is a reactant, but exothermic when energy is a product.
A thermochemical equation is a stoichiometric chemical equation with a balanced enthalpy change, H. A thermochemical equation in variable form would look like this: A + BC.
Therefore, the thermochemical reaction is H₂S +CO₂ = CS₂ + water vapor.
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an ion of platinum has a mass number of 195 and contains 74 electrons. How many
protons and neutrons does it contain, and what is its charge?
ompound
Answer:
djffffffffffffffffffffffffffffffffffffffffffffffffffffffffffgk
Explanation:
jdrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr
Which contains a greater number of atoms: 1 mole of sulfur dioxide gas at STP or 1 mole of methane gas (CH4) at
STP? Explain / prove.
The two mentioned gases have the same number of atoms as they are present at STP.
What is an atom?
An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
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Oxide of the trivalent element contains 31.58% oxygen
Calculate the equivalent, molar and atomic masses of this
element.
Answer:
In X2O3,. Percentage of oxygen by weight = 31.58. Percentage of X by weight = 68.42. Let the atomic weight of X = x. 2x+482x×100 = 68.42. ∴ x = 51.99.
Explanation/solution in image
Answer the questions for 100 points!
6) The constant is the amount of beverage in each sample. Option C
7) Greater amount of carbon dioxide dissolve at lower temperatures
8) It shows that the hypothesis should be thrown away. Option D
9) The independent variable is the temperature. Option B
What is an experiment?When we talk about an experiment, then we would have to look at the interplay of one or more variables. It is common that when we are doing an experiment, the dependent variable would have to interface with the independent variable.
We can see that in the experiment, we are trying to find out the impact of the temperature on the mass of the carbon dioxide.
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Please help I need help solving this IUPAC name for the compound shown here.
IUPAC named for the compound shown here is 1- hydroxyl, 3- ethyl, hexane.
What is IUPAC system ?The International Union of Pure and Applied Chemistry is full form of IUPAC. It is important because it creates a standardized way to name chemical compounds in organic chemistry.
The International Union of Pure and Applied Chemistry recommends using the IUPAC nomenclature of organic chemistry to name organic chemical substances.
The rule of the first point of difference states that the series that includes the lowest number when the first difference occurs is the "lowest."
Thus, IUPAC named for the compound shown here is 1- hydroxyl, 3- ethyl, hexane.
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Calculate the mass in grams in a sample containing 2.40×10^23 S03 molecules.
Answer: 31.2 g
Explanation: Given,
2.40 x 10^23 molecules of SO3
number of moles (n) = given number of molecules / total number of molecules
n = 2.4 x10^23/ 6.023 x 10^23
n = 0.39 moles
mass = molecular mass x number of moles(n)
mass in grams = 80 (Molecular mass of SO3) x 0.39
mass in grams = 31.2 g
if there are 25 red colored glass beads in a bag that contains 150 glass beads, what is the percent of red glass beads? show your calculations.
The percentage of red glass beads would be = 16.67%
What is percentage?Percentage is defined as the part of a portion of a value per 100 and it is represented by the symbol %.
The number of red colored glass beads = 25
The total number of glass beads = 150
The percentage of glass beads that are red colored glass would be;
= 25/150×100
= 2500/150
= 16.67%
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Which example is a biotic factor of an aquarium ecosystem?
A) gravel on the bottom of the aquarium
B) algae growing on the glass
C) plastic plants placed in the gravel
D) rock structure
An example of a biotic factor of an aquarium ecosystem is an algae growing on the glass. Option B is the correct answer.
What is a biotic factor?This refers to a living organism that shapes its environment. The examples of biotic factor that make up fresh water ecosystem are: aquatic plants, fish, amphibians,fungi, bacteria, and protists. and algae.
The biotic factors are gropped into : producers, consumers, and decomposers.
The producers, convert abiotic factors into food. They include plants and algae.The consumers do not make their own food .They consume producers or other consumers to get food energy.The decomposers are the organisms that break down organic matter from dead plants and animals into the inorganic components, for example carbon and nitrogen, which are important for life.Learn more about biotic factor on
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Please I’m timed!!!!
If sec 0 = -7.3 find sin (0 - pi/2)
7.3
-7.3
-0.14
0.14
Answer:7.3
Explanation:
Help with the following problems attached!!
1. The mass of8.12 × 10²⁴ atoms of Co is 4.77 × 10^25 g.
2. There are 2.24 x 10²² atoms of carbon in 4.08g of aspirin.
How can the mass be calculated of cobalt?To calculate the mass of 8.12 × 10²⁴ atoms of Co in grams, we need to know the atomic mass of cobalt (Co) in grams per mole. According to the periodic table, the atomic mass of Co is 58.93 g/mol.
We can calculate the mass of 8.12 × 10²⁴ atoms of Co by using the formula:
mass = (number of atoms) x (atomic mass)
mass = (8.12 × 10²⁴ atoms) x (58.93 g/mol)
mass = 4.77 × 10²⁵ g
So, the mass of 8.12 × 10²⁴ atoms of Co is 4.77 × 10²⁵ g.
Aspirin, also known as acetylsalicylic acid, has the chemical formula C9H8O4. To find out how many carbon atoms there are in 4.08g of aspirin, we can use the formula:
(Mass of aspirin) / (molar mass of aspirin) x (number of moles of C in aspirin)
We know the mass of aspirin is 4.08g and we can look up the molar mass of aspirin, which is 180.159 g/mol. To find the number of moles of C in aspirin, we can count the number of C atoms in the formula of aspirin which is 9 atoms, and then multiply that number by Avogadro's number, which is 6.022 x 10^23 atoms/mol.
So the number of carbon atoms in 4.08g of aspirin is:
4.08g / 180.159 g/mol * (9 atoms × 6.022 x 10²³ atoms/mol) = 2.24 x 10²² atoms
So there are 2.24 x 10²² atoms of carbon in 4.08g of aspirin.
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Compare the bond length for NH3, NF3, and PF3. Explain.
The bond length for NH3, NF3, and PF3 can be compared based on their molecular geometry and the strength of the chemical bonds between the atoms.
NH3 has a bond angle of 107 degrees and a bond length of 1.01 Angstroms. This is due to the presence of a lone pair of electrons on the Nitrogen atom which causes the bond angles to deviate from the ideal tetrahedral angles of 109.5 degrees.
NF3 has a bond angle of 107 degrees and a bond length of 1.1 Angstroms. This is due to the presence of a lone pair of electrons on the Nitrogen atom which causes the bond angles to deviate from the ideal tetrahedral angles of 109.5 degrees.
PF3 has a bond angle of about 101 degrees and a bond length of 1.48 Angstroms. This is due to the fact that the Fluorine atoms are larger than the Nitrogen atoms of NH3 and NF3, and the bond between Phosphorus and Fluorine is stronger and shorter than the bond between Nitrogen and Hydrogen or Nitrogen and Fluorine.
In summary, the bond length of NH3 and NF3 is shorter than that of PF3 due to the smaller size of Nitrogen atoms compared to Phosphorus and the presence of lone pairs on Nitrogen atoms. The bond between Nitrogen and Hydrogen or Nitrogen and Fluorine is weaker than the bond between Phosphorus and Fluorine.
Which labelled part is responsible for the ability of metals to be bent and shaped?
The majority of metals are malleable, meaning they can be bent and moulded without breaking.
define moulding ?
architect a shaped outline, especially one used on cornices, etc.
a formed strip of wood, stone, or other material
a moulded item, a decorative recessed or relieved surface, a decorative plane or curved strip for embellishment or finishing
The majority of metals are malleable, meaning they can be bent and moulded without breaking. This is due to the fact that they are made up of layers of ions that can glide over one another when the metal is twisted, hammered, or pushed. Most metals are ductile because the ions slide over one other and may be drawn/pulled into wires, making them excellent for electric cables.
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A 3.5-L sample of helium gas, collected at 0.00°C and 1.00 atm, is compressed into a 0.50-L cylinder. What pressure will the gas exert in the cylinder at 39.1°C?
The pressure of a gas is directly proportional to its temperature and inversely proportional to its volume.
PV/T = PV/T
(1.00atm * 3.5 L)/ 273k = (P * 0.50L)/(39.1 + 273k)
Do some simple algebra and you will get
P = 8.0 (Note that there should be 2 sigfigs)
Calculate the vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane (C₂H4Br₂, Pº=127 torr)
in 1.80 mol of liquid dibromopropane (C3H6Br2, P=173 torr).
torr
The vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane the vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane is 164.83 torr.
What is vapor pressure ?The term vapor pressure is defined as the tendency of a material to change into the vapour state, and it increases with temperature.
For calculating mole fraction of C₂H₄Br₂ as follows
X C₂H₄Br₂ = moles of C₂H₄Br₂ / moles of C₂H₄Br₂ + moles of C₃H₆Br₂
= 0.3 / 0.3 + 1.80
= 0.14
For calculating mole fraction of C₃H₆Br₂ as follows:
XC₃H₆Br₂ = moles of C₃H₆Br₂ / moles of C₂H₄Br₂ + moles of C₃H₆Br₂
= 1.80 / 2.1
= 0.85
For calculating total vapor pressure as follows:
P total = [ ( 0.14 × 127) + (0.85 × 173) ]
= 17.78 + 147.05
= 164.83 torr
Thus, The vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane the vapor pressure at 85.0°C of a solution prepared by dissolving 0.300 mol of liquid dibromoethane is 164.83 torr.
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EARTH SCIENCE
Drag and drop the words into the correct locations.(2 points)
Two astronomers accidentally discovered______, which is evidence of universe expansion that supports the Big Bang theory. This is particularly strong evidence because its temperature is ______. By observing this today, we can see what the universe looked like______?
Background radiation
137,000,000 years ago
not uniform
uniform
13,700,000,000 years ago
SOMEONE PLEASE HELP ME!!...
Accidental cosmic background radiation, remarkably uniform, billions of years ago.
what is radiation ?
Radiation is a form of energy that is emitted in the form of waves or particles. It is an invisible form of energy that travels through space. Radiation is present everywhere in the environment and is emitted from many sources, both natural and man-made.
Natural sources of radiation include the sun, rocks, soil, and the air. Man-made sources include nuclear power plants, medical devices, and X-ray machines. There are several forms of radiation including alpha, beta, and gamma radiation. Alpha radiation is made up of particles, while beta and gamma radiation consists of electromagnetic waves. Different types of radiation have different properties that make them useful in various applications. For example, gamma radiation is used in medical imaging.
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Which factor causes chemical weathering
A gravity
B sunlight
C Acids
D wind
Answer:
C
Explanation:
because its the answer
Answer:
acids
Explanation:
acids because if the rain comes from cloud is acid it can be weathered or if the water is slightly acidic
The measurement of 5342nm is the same length as _____ cm in scientific notation?
Answer:
Explanation:
5.342 x 10 the power of 7
Contains 8.2 mol of oxygen and 8.22 mol of lead
The mole fraction of oxygen in the cylinder, given that the cylinder contains 8.2 moles of oxygen and 8.22 moles of lead is 0.499
How do I determine the mole fraction of oxygen?Mole fraction is simply defined as:
Mole fraction of subtance = Mole of sunstance / total mole
Next, we shall determine the total mole in the cylinder. Details below:
Mole of oxygen = 8.22 moles Mole of lead = 8.22 molesTotal mole = ?Total mole = Mole of oxygen + mole of lead
Total mole = 8.2 + 8.22
Total mole = 16.42 moles
Finally, we shall determine the mole fraction of oxygen in the cylinder. Details below:
Mole of oxygen = 8.22 moles Total mole = 16.42 molesMole fraction of oxygen =?Mole fraction of oxygen = mole of oxygen / Total mole
Mole fraction of oxygen = 8.2 / 16.42
Mole fraction of oxygen = 0.499
Thus, we can conclude from the calcultions made above that the mole fraction of oxygen is 0.499
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Complete question:
A cylinder contains 8.2 mol of oxygen and 8.22 mol of lead. What is the mole fraction of oxygen in the cylinder?
How mans, gram of HBr would exactly be
required to react with 2g of propyne ?
(Br=80,H=1, c=12) C3 H4+2HBr–> C3 H6 Br2
Answer:
The number of moles of HBr required to react with 2 g of propyne can be calculated by using the balanced chemical equation:
C3 H4 + 2HBr → C3 H6 Br2
The molar mass of propyne is (3 x 12 + 4 x 1) = 40 g/mol
So, 2 g of propyne is equal to 2/40 = 0.05 moles of propyne.
Since 2 moles of HBr are required to react with 1 mole of propyne, then 0.05 moles of propyne would require 0.05 x 2 = 0.1 moles of HBr.
Finally, to find the number of grams of HBr, we multiply the number of moles by its molar mass, which is (1 x 1 + 80 x 1) = 81 g/mol
So, 0.1 moles of HBr is equal to 0.1 x 81 = 8.1 g of HBr.
