c) Chemical, Combustibility/Reaction Iron reacts with Sulphur to give heat and a flame.
What happens when you heat iron and sulphur together?Iron sulphide, a chemical, is created when you burn iron and sulphur together. A series of chemical compounds comprised of iron and sulphur is referred to as iron sulphide, or simply iron sulphide. The chemical molecule and mineral known as iron sulphide, sometimes known as iron(II) sulphide, has the formula FeS.
Incandescence is the process of a solid emitting light after being heated till it glows or emits light. The colour of an iron bar when warmed to a very great temperature changes from red to white as the temperature increases.
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•) At 741 torr and 44°c, 7.10gol a gas occupy a volume of 5.40ml
what is the moler mass of the gas?
3.5 × 10^6 g
according to ideal gas equation, PV = nRT
where, p is pressure v is volume, n is mole of gas, r is gas onstant and t is temperature.
Pressure (p) = 741 Torr = 1 bar
Volume (V) = 5.40 ml= 0.0054litre
Amount of substance (n) mol = ?
Temperature (T) 44°C= 371kelvin
so by putting all values in equation. PV = nRT
= 1 × 0.0054 =n ×8.31 ×371
n ≈ 0.000002 = 2.0 × 10^-6
now, n is mole of gase,
mole = given mass ÷ molecular mass
given mass = 7.10g
molecular mass = given mass ÷ mole
7.10 ÷ 2.0 × 10^-6
= 3.5 × 10^6 g
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HELPPP
Ferric chloride combines with water in a reversible reaction to produce ferric hydroxide and hydrochloric acid as shown.
FeCl3 + 3H₂0 Fe(OH)3 + 3HCI
Which reaction must occur at the same time as the formation of ferric hydroxide?
(1 point)
O Fe(OH)3 + 3HCI → FeCl3 + 3H₂O
O FeCl3 + 3HCI → Fe(OH)3 +3H₂O
O FeCl3 Fe + 3Cl
O 2H₂O → H₂ + O₂
Ferric chloride combines with water in a reversible reaction to produce ferric hydroxide and hydrochloric acid as shown.
[tex]FeCl_{3}[/tex] + 3H₂O → [tex]Fe(OH)_{3}[/tex] + 3HCI
The reaction which must occur at the same time as the formation of ferric hydroxide are given below .
[tex]FeCl_{3}[/tex] → Fe · + Cl ·
So , option C is correct one .
The water ionizes to hydrogen and hydroxide ions and the ferric chloride in the water ionizes to iron, or ferric and chloride ions. As a result, the solution becomes more hydrogen ion-rich than it was before the precipitation, which causes the solution to become acidic.
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Answer:
The real answer is Fe(OH)3 + 3HCI - FeCl3 +3H2O
Explanation:
I took the test and this was the correct answer.
What is the meaning of electronegativity
Answer:
Electronegativity is the ability of an atom to attract the shared pair of electrons towards itself *in a molecule*
Calculate the ratio of the mass ratio of S to O in SO to the mass ratio of S to O in SO2 . Consider a sample of SO in which the mass of S = 32 g and the mass of O = 16 g . Assume that in SO2 that there is also 32 g of S .
The correct answer is The mass ratio of S to O in SO divided by the mass ratio of S to O in SO2 is 2 :1.
When two elements can combine to form two or more different compounds, the mass of one element compared to the fixed mass of the other will always be in a ratio of small whole numbers.
As we all know,
Oxygen mass = 16 g
Sulfur mass = 32 g
Sulfur mass in SO = 32 g
The mass of oxygen in SO is 16 g.
Sulfur to oxygen mass ratio in SO =..... (1)
Sulfur mass in SO2 = 32 g
Oxygen mass in SO2 = (2 16)g = 32 g
Sulfur to oxygen mass ratio in SO2 =..... (1)
The S/O ratio in SO is 2: 1.
The S/O ratio in SO2 is 1: 1.
Taking the ratios 1 and 2, we get:
the mass ratio of S to O in SO to mass ratio of S to O in SO2 is 2 : 1
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Kp equals 25 at 500c. The pressure of butane is 20. atm and isobutane is 0.0 atm Calculate the pressure of both gases at equilibrium.
The pressure of butane is 20 P(butane) = 0.77 atm and pressure of P(isobutane) = 19.2 atm
Isomerization reactionIsomerization is the transformation of a molecule into a different isomer, and it can take one of two forms: cis or trans. Protein isomerization was first described in 1968 as a method of dramatically altering protein conformation by disrupting polypeptide secondary structure.
Isomerism is caused by two main factors: Difference in atom linking mode. Difference in the spatial arrangement of atoms or groups. The difference in the mode of atom linking is one of the two main causes of isomerism. Difference in the spatial arrangement of atoms or groups.
Types :The two main types of isomerism are structural or constitutional isomerism, in which the bonds between the atoms differ, and stereoisomerism or spatial isomerism, which occurs when the bonds are similar but the relative positions of the atoms differ.
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I understand the question you are looking for
For the isomerization reaction:
butane ⇌ isobutane
Kp equals 25 at 500°C. If the initial pressures of butane and isobutane are 20. atm and 0.0 atm, respectively, what are the pressures of the two gases at equilibrium?
A) P(butane) = 20 atm and P(isobutane) = 0.80 atm
B) P(butane) = 19.2 atm and P(isobutane) = 0.77 atm
C) P(butane) = 0.77 atm and P(isobutane) = 19.2 atm
D) P(butane) = 0.80 atm and P(isobutane) = 20. atm
The partial electron configuration of an atom with 11 electrons is shown.
1s²2s²2p6x
Which of the following does X represent?
A. 3s¹
B. 2d¹
C. 3p¹
D. 4s¹
Answer:
This would be 3S^1.
Explanation:
It would be 3s^1 because that is how the orbitals are formed.
It would be form lowest to highest: s,p,d,f.
Then it would go to highest, 2 =s, 6=p, d =10, f= 14.
So, it would be: 1s2, 2s2, 2p6, 3s2.
Since 3s2 isn't on here, then 3s1 would become the answer.
A chemist records the amount of liquid dispensed by a machine and obtains the following values: 283.2 mL, 284.1 mL, 283.9 mL, 284.0 mL, 284.1 mL. The machine is supposed to dispense 296 mL of liquid. Which of the following describes the accuracy and precision of the machine?
precise but not accurate
accurate but not precise
neither accurate nor precise
accurate and precise
The machine is accurate and precise
Hence , option D is correct one .
Accuracy is the capacity of an instrument to measure the precise value. In other words, it refers to how closely the measured value resembles a reference or genuine value. Small readings can be taken to increase accuracy. The calculation's inaccuracy is decreased by the little reading.
The precision of a substance is defined as the degree to which two or more measurements agree with one another. It is incredibly precise but not always accurate to measure something if you weigh it five times and get 3.2 kg each time. Accuracy is not necessary for precision.
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Is there anything wrong in this definition, if so, write the correct form: Intensive properties do not depend on the amount of matter present. Such properties include the melting point, boiling point, density, and ability to conduct electricity and to transfer energy as heat. Intensive properties are the same for a given substance regardless of how much of the substance is present.
Help will give brainly!!
Answer:
The definition and all examples are correctly mentioned only one mistake is spotted which is transfer of energy as heat included in Intensive Property which is wrong.
Explanation:
Intensive Property: Intensive properties are those properties which are Independent of the amount substance present.
For e.g. The melting point of ice on standard temperature & pressure is constant i.e. 0°C.
1 gram of ice will melt at 0°C so will be 1 kilogram ice. Hence melting point & similarly boiling point also is an Intensive Property.
before talking about Density let's understand Extensive properties.
Extensive Property: Extensive properties are those properties which are Dependent of the amount substance present.
for e.g. Volume, Weight, Mass, Length, Energy, Enthalpy, Entropy etc.
When One extensive divided by another extensive Property then perticular that property of substance is also intensive property.
Now we know that,
[tex] \sf Density = \frac{Mass}{volume} [/tex]
Where mass & volume both are extensive properties, hence density is an intensive property.
Ability to conduct electricity is called as Thermal Conductivity which is an intensive property.
The thermal conductivity of a perticular material does not change it varies material to material.
Transfer of energy as heat, let's have quick look at heat & temperature relation given by,
[tex]C = \frac{Q}{\Delta T} [/tex]
Where C is specific heat capacity which is an intensive property & specific heat is the ratio of added heat to the change in temperature & Heat is an Extensive property.
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convert 1295 cm2 to m2
Answer:
0.1295 m^2
Explanation:
just divide 1295 by 10000
This is an impossible formula. Pretend it is real.
If you had 1 mol of Mn4(ClO4)3 how many moles of Cl would there be?
Remember that you should never include a 1 as a subscript but for the sake of clarity for this problem you may see a 1 as a subscript.
Make sure your answer includes TWO decimal places.
The number of mole of Cl in 1 mole of Mn₄(ClO₄)₃ is 3.00 moles
Description of Mn₄(ClO₄)₃From the formula of the compound, Mn₄(ClO₄)₃ the following were obtained:
4 moles of Mn3 moles of Cl12 moles of OHow to determine the number of mole of Cl in 1 mole of Mn₄(ClO₄)₃From the formula, we can see that 3 moles of Cl are present.
Thus, 1 mole of Mn₄(ClO₄)₃ will contain = 1 × 3 = 3.00 moles of Cl
Therefore, we can conclude that 1 mole of Mn₄(ClO₄)₃ contains 3.00 moles of Cl
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how many moles of nickel are in atoms are there in 9.00 X 10^9 Ni atoms
Answer:
1.49 x 10⁻¹⁴ moles Ni
Explanation:
To find the amount of moles in the sample, you need to multiply the amount of atoms by Avogadro's Number. This conversion is a ratio that describes how many atoms there are per every 1 mole. It is important to arrange the ratio in a way that allows for the cancellation of units (atoms should be in the denominator). The final answer should have 3 sig figs like the given value.
Avogadro's Number:
6.022 x 10²³ atoms = 1 mole
9.00 x 10⁹ atoms Ni 1 mole
--------------------------------- x -------------------------------- = 1.49 x 10⁻¹⁴ moles Ni
6.022 x 10²³ atoms
What is the name and function of this laboratory glassware
Answer: Protects your eyes from chemical splashes, Must be worn during all labs, from start to lab checkout, in which chemicals, glass or heating of substances is involved. No exceptions!!
A typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid. convert to grams
A typical aspirin tablet contains 321 mg of the active ingredient acetylsalicylic acid and 321 mg makes 0.321 g.
Define Aspirin.The nonsteroidal anti-inflammatory medicine (NSAID) aspirin, often referred to as acetylsalicylic acid (ASA), is used to treat a variety of inflammatory disorders by lowering pain, fever, and/or inflammation. These conditions include Kawasaki disease, pericarditis, and rheumatic fever.
Long-term usage of aspirin is also used to help those at high risk avoid further heart attacks, ischemic strokes, and blood clots. Effects of pain or fever often start within 30 minutes. Aspirin functions similarly to other NSAIDs but also inhibits platelet function.
What risks does aspirin pose?Your doctor should be consulted when deciding whether or not to take aspirin because it depends on your cardiovascular risk, according to Wong. While aspirin is often taken safely by many people, it can also result in life-threatening stomach, intestinal, and brain bleeding.
convert mg to gram1 mg = 1/1000 g
so,
321 mg = 321/ 1000g
= 0.321g
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Why is the classification species not considered a group? (1 point)
O Each species is a separate type of organism.
O Each species is an individual organism.
O Each species lacks the characteristics of the levels above.
O Each species shares characteristics with other species.
Each species is a separate type of organism.
A species is a group of creatures that share similar traits. The same species of organisms are capable of sexual reproduction as well as interbreeding and producing fertile offspring. It is a fundamental unit of taxonomy and classification.The system is divided into seven categories: Kingdom, Phylum or Division, Class, Order, Family, Genus, and Species. Kingdom is the most inclusive category.In a group, many types of an organism can be included even if they do not share the same traits. But species is a group of organisms that share similar traits.For example, human beings are species as they are all alike in physical features, way of reproduction, etc. But the animal is considered a group because it included a variety of living beings.Therefore, Each species is not considered a group.
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Haaaaaaaalllllllpppppp
Name 2 Triangular Items that are something you can hold. And then name those items' Length, Width, Height, Area, or Volume.
Answer:
ice creem cone candy
Explanation
How can some fish change their
depth in the water column?
Answer:
skill
Explanation:
Answer: The more air a fish swim bladder contains, the higher the fish will suspend or float in the war.
Explanation:
explain how the line spectrum of hydrogen atom in Lyman series is formed
Line spectrum of hydrogen atom in Lyman series is formed 'absorbs energy and gets excited'
The electron in a hydrogen atom absorbs energy and gets excited and the electron jumps from a lower energy level to a higher energy level and when it comes back to its original state, it gives out energy which forms a hydrogen spectrum and the line in Lyman series is formed by electronic transition and all the wavelengths in the Lyman series are in the ultraviolet band and this are seen in ultraviolet emission lines of the hydrogen atom as an electron goes from n ≥ 2 to n = 1 where n is the principal quantum number and the lowest energy level of the electron.
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Name the material sent into slave by a supernova
Review the terms and their definitions in the Mini Glossary. Write a sentence explaining how your body gets energy from food
Food energy is transformed into energy that the body's cells can utilise during cellular respiration. Energy is converted to ATP during cellular respiration, which transforms glucose and oxygen into carbon dioxide and water.
What kind of energy is used by your body to develop and maintain itself?
Your body can move its muscles when you ingest food, which enables you to breathe, walk, run, leap, lift objects, and perform all the other survival-related tasks. The mechanical energy of moving muscles is created from the chemical energy of food.
What kind of energy is used by your body to develop and maintain itself?Your body can move its muscles when you ingest food, which enables you to breathe, walk, run, leap, lift objects, and perform all the other survival-related tasks. The mechanical energy of moving muscles is created from the chemical energy of food.
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58.6 grams to milligrams
Answer: If you mean converting 58.6 grams to milligrams that would be 58600
Explanation:
A nugget of gold occupies 5.64 mL of water and weighs 108.8521g. Its density is
The density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
The density of a gold nugget can be calculated by using the following formula:
Density of nugget = Mass of gold nugget/Volume occupied by gold nugget
Here,
the mass of gold is given to be 108.85 grams and the volume occupied by gold is given to be 5.64 ml or 5.64 cm^3.
Putting these values in the above equation
Density = 108.85 g / 5.64 cm^3
Density = 19.29 g/cm^3
Thus, the density of a nugget of gold which occupies 5.64 ml of water and weighs 108.85 g is 19.29 g/cm^3.
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PLS HELP ME WITH MY CHEMISTRY
Answer:
[tex] \boxed{8.9 \: g /cm^3}[/tex]
Explanation:
Given:
Mass of sample= 39.2 g
Volume occupied= 4.4 cm³
To find:
Density=?
Solution:
Formula to be used,
[tex]\sf Density = \frac{mass}{volume} [/tex]
[tex]\sf Density = \cancel{ \frac{39.2}{4.4} } = 8.9 \bar{0} \bar{9} \: g /cm^3[/tex]
The rounder figure answer upto tenths place can be written as 8.9 g/cm³
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chemical element that has atomic number less than 58 and atomic mass greater than 135.6
A chemical element that has an atomic number less than 58 and an atomic mass greater than 135.6m is barium (atomic no. 56 and atomic mass137.13 ) and lanthanum (atomic no. 57 and atomic mass 135.6).
Give a brief introduction about Barium and Lanthanum. BariumBarium is an element with the symbol Ba and atomic number 56. It is an alkaline earth metal that is soft and silvery, and it is the fifth element in group 2. Barium is never found in nature as a free element due to its extreme chemical reactivity. Oil well drilling fluid uses barium sulfate as an insoluble ingredient. It is employed as an X-ray radiocontrast agent in a purer form to image the human gastrointestinal tract. Barium compounds that dissolve in water have been employed as rodenticides despite being hazardous.
LanthanumChemical element lanthanum has the atomic number 57 and the symbol La. It is a silvery-white, ductile, soft metal that slowly tarnishes when exposed to air. It serves as the eponym for the group of 15 related elements in the periodic table between lanthanum and lutetium, of which lanthanum is the first and prototype. The rare earth elements traditionally include lanthanum.
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A solid object has a mass of 1.62 lb and a volume of 190 mL.
Express your answer using two significant figures.
The density of a solid object that has a mass of 1.62 lb and a volume of 190 mL is 3.87g/mL.
How to calculate density?Density is the measure of the mass of matter contained by a unit volume. It can be calculated by dividing the mass of the substance by its volume.
According to this question, a solid object is said to have a mass of 1.62 lb and a volume of 190 mL.
1 pound = 453.592 grams
1.62 Ibs is equivalent to 734.82 grams
Density of the solid object = 734.82 grams ÷ 190 mL
Density = 3.87g/mL
Therefore, the density of a solid object that has a mass of 1.62 lb and a volume of 190 mL is 3.87g/mL.
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The emission spectrum of cesium contains two lines whose frequencies are (a)
3.45 xx 10¹4 Hz and (b) 6.53 xx 10¹4 Hz. What are the wavelengths and energies per
photon of the two lines? What color are the lines?
The lines are violet and blue respectively.
What is the energy?We know that the energy of the photon could be obtained by the use of the equation;
E = hf
E = energy
h = Plank's constant
f = frequency
For the first line;
E = 6.6 * 10^-34 Js * 3.45 x 10^14 Hz = 2.3 * 10^-19 J
Given that;
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/2.3 * 10^-19
λ = 8.61 * 10^-7 m or 861 nm
The color is violet
For the second line;
E = 6.6 * 10^-34 Js * 6.53 xx 10^14 Hz
E = 4.3 * 10^-19 J
E = hc/λ
λ = hc/E
λ = 6.6 * 10^-34 * 3 * 10^8/4.3 * 10^-19
λ = 4.60 * 10^- 7 m or 460 nm
The color is blue
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DHMO can be lethal (deadly) to humans in small doses.
O True
O False
Yes, DHMO (Dihydrogen monoxide) can be lethal (deadly) to humans in small doses. It's true.
Briefing :Dihydrogen monoxide is a known cause of thousands of deaths each year and contributes significantly to the millions of dollars in environmental and property damage. Dihydrogen monoxide is known to pose several risks, including:
Death from accidental DHMO inhalation, even in small amounts.Solid DHMO exposure over an extended period of time harms tissues severely.A number of unpleasant, but typically not life-threatening, side effects result from excessive ingestion.Acid rain primarily consists of DHMO.Severe burns can result from DHMO gas.Causes soil erosion to occur.To know more about soil erosion :
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Determine the number of protons, neutrons, and electrons present in each of the atoms.
53 Cr
protons:
neutrons:
electrons:
Answer:
protons: 24
neutrons: 29
electrons: 24
Explanation:
How many moles of Ne are contained in a 5.00 L tank at 155°C and 2.80 atm?
There will be 0.39 moles
Take a look at the He gas in the tank:
P = 2.80 atm, or pressure
Volume = 5.00 liters.
T = (273 + 155) is the temperature. K = 428 K
R = 0.08206 L atm/L of gas (mol K)
Charle's law, Boyle's law, and Gay-Lussac law are the three gas laws that make up the combined gas law, commonly referred to as a general gas equation. For a certain amount of gas, the law illustrates the relationship between temperature, volume, and pressure.
Gas law PV = nRT
So, n = PV/. (RT)
He gasses number = 2.80 x 5.00 / (0.08206 x 428) mol equals 0.39 mol.
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The _____which are numbers that are found on the lower____hand side of each element symbol. This tells you the number of ____of this element in the molecule
Answer:
twenty charecter answer
PLS HELP!! Animation shows a complete revolution of the Earth around the sun. What happens during this time?
A. Earth experiences a complete day.
B. The moon makes one complete phase change.
C. Four seasons occur on Earth.
D. Day turns to night. Btw this is Science not chemistry!
Answer:
C
Explanation:
it would be a lot more easier if you could show the animation
But nevertheless your answer would be
C Four seasons occur on Earth.
Answer: The answer is letter C.
Explanation:
There are four seasons on our planet Earth . These four seasons are, Spring, Summer, Autumn, And Winter (my personal favorite.)
These four seasons only occur, based on which side of the sun our continent is on. Yes we could literally be facing the sun, but the sun isn’t really directing heat now. (Don’t fact check that.) but anyways, hopefully this helps. And remember, the earth take 365 days to orbit the sun. Which is 12 months, and each season has 3 months each to roam the earth.
