Answer
b
Explanation:
1. Mercury is most often obtained by roasting cinnabar (HgS). How many grams of cinnabar
are required to obtain 165 grams of mercury?
HgS + 02—-Hg + SO2
Answer:
191.4 grams of cinnabar are required to obtain 165 grams of mercury.
Explanation:
The balanced reaction is:
HgS + O₂ ⇒ Hg + SO₂
By reaction stoichiometry, the following amounts of moles of each compound participate in the reaction:
HgS: 1 mole O₂: 1 mole Hg: 1 mole SO₂: 1 moleBeing the molar mass of each compound:
HgS: 232g/moleO₂: 32 g/moleHg: 200 g/moleSO₂: 64 g/molethe following mass amounts of each compound participate in the reaction:
HgS: 1 mole* 232 g/mole= 232 gO₂: 1 mole* 32 g/mole= 32 gHg: 1 mole* 200 g/mole= 200 gSO₂: 1 mole* 64 g/mole= 64 gThen you can apply the following rule of three: if by stoichiometry 200 grams of Hg are formed from 232 grams of HgS , 165 grams of Hg are formed from how many grams of HgS?
[tex]mass of HgS=\frac{165 grams of Hg*232 grams of HgS}{200 grams of Hg }[/tex]
mass of HgS= 191.4 grams
191.4 grams of cinnabar are required to obtain 165 grams of mercury.
HELPP ILL GUVE YOU LOTS OF POINTS EVERYTHING U WANT I REALLY NEED HELP
Answer:
jupiter is your answer
Explanation:
you weigh more there
How are beef and gas productions related to methane levels?
Plzzz answer quick
Answer:
Cows and other ruminant animals (like goats and sheep) emit methane, a potent greenhouse gas, as they digest grasses and plants. This process is called “enteric fermentation,” and it's the origin of cows' burps.
Explanation:
PLEASE HELP I WILL MARK YOU BRAINLIEST !!If you react 4.25 moles of FeCl2, how many moles of Cl2 did you also react?
PLEASE IM BEGGING FOR HELPPPPP
Answer:
2 FeCl2 + Cl2 -> 2 FeCl3
According to numbers in reaction
Amount of Cl2 is half of FeCl2
Explanation:
A Jeweler is making sapphire rings using 2 sapphires on every 1 ring. If the jeweler has 12 sapphires and 10 rings, what is the theoretical yield? (3 points)
O 5 sapphire rings
O 6 sapphire rings
O 10 sapphire rings
O 12 sapphire rings
3 (05 05 LC)
The theoretical yield is 6 sapphire rings.
What is Theoretical yield?This is the total product formed as a result of the complete conversion of
the reactants. In this scenario, the reactant is the 12 sapphires in which 2
of it is needed to produce one sapphire ring.
This however translates to the theoretical yield being 6 sapphire rings
which is gotten by:
2 sapphires = 1 ring
12 sapphires = x
Cross multiply
2x = 12
x= 12/2 = 6 sapphire rings.
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which one is? Will give brainliest
Answer: 2Cr + 3Br2 Yields 3CrBr3
Explanation:
We know that 4a is not balanced because there are 3 Nitrogen atoms on the reactants side and 2 on the products side.
We know that 4c is not balanced because there are 4 Chlorine atoms on the reactants side and 2 on the products side. (Remember there are 2 Cl2 atoms. Therefore, 2 times 2 means there are 4 Chlorine atoms on the reactants side)
Finally, we know the answer is not 4d because there is 1 Potassium on the reactants side and 2 potassiums on the products side.
Therefore, the answer must be 4b, which contains 2 Chromium atoms and 6 bromine atoms on each side
Describe what happens when a bond is created between magnesium and bromine. Be specific and explain in terms of electrons.
Answer: Magnesium and Bromine/MgBr2 = Ionic compounds
Explanation: When atoms form together they can form between Ionic Compounds and molecules; this could depend on if they're joined by Covalent bonds as well because when atoms form with Covalent bonds, it forms Molecules.
1. 2.00 L of gas is at 740 mm Hg. What is its volume at standard
pressure?
0.16
Explanation:
when you divided 1.2.00 with 740 you get this number.
4) What mass of hydrogen is formed when 2.00g of magnesium
Mg + H2SO4–>H2SO4
Answer: 0.16 g H2
Explanation:
Mg+ H2SO4= MgSO4 + H2
Atomic massof Mg is 24
Molecular mass of H2 is 2
So,
24g Mg produce 2 g H2
1g Mg produce (2÷24)= 0.083 g H2
2.00g Mg produce (0.083×2) g H2
= 0.16 g H2
0.16g of hydrogen is formed when 2.00g of magnesium.
The mass of hydrogen gas formed when 2.00g of magnesium is equal to 0.165 g.
What is the balanced chemical equation?The chemical equation of a reaction is said to be a balanced equation when the number of atoms of substances is equal on either side of the equation.
Evergy balanced chemical equation must follow the law of conservation of mass according to which the total mass of the substances present on the reactant side should be equal to the total mass of substances present on the product side.
Given, the balanced chemical equation of the reaction of Mg and sulfuric acid:
[tex]Mg + H_2SO_4 \longrightarrow MgSO_4 +H_2[/tex]
One mole of magnesium produces hydrogen gas = 1mol
Given the mass of magnesium = 2g
The number of moles of Mg = 2/24.3 = 0.082 mol
Then the number of moles of hydrogen gas formed = 0.082 mol
The mass of the hydrogen gas = 0.082 × 2 = 0.165 g
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How do I do nunber 8?
Answer:
DONT CLICK THAT LINK THAT IS HACK AND VIRUS
Explanation:
Need help ASAP DUE IN LIKE 2 minutes!!!!!!! Points are added
Proton:
Positive
Found in Nucleus
Mass of 1 AMU
Neutron:
Neutral
Found in Nucleus
Mass of 1 AMU
Electron:
Negative
Found in orbitals
Mass of 0 AMU
Please mark Brainliest if this helped you! :)
SHOW WORK
A sample of gas at 62.0°C occupies a volume of 4.80 L at a pressure of 2.90 atm. How many moles of gas are contained in the sample?
A sample of gas at 62.0°C occupies a volume of 4.80 L at a pressure of 2.90 atm. 0.506 moles of gas are contained in the sample.
What is mole?Inside the World System of Units, the mole is indeed the unit of substance amount (SI). How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. There are precisely 6.022×10²³ elementary entities in a mole.
An elementary entity can be an atoms, a molecule, an ion, and ion pair, or a fundamental particle like an electron depending upon what the substance is. For instance, although having differing volumes and masses, 10 moles liquid water as well as ten moles of mercury both contain the same quantity of material, as well as the mercury includes exactly one atom with each molecule of water.
PV = nRT
n = PV/RT
P = 2.90 atm
V = 4.80 L
R = 0.08206 L atm / mol K
T = 62.0 + 273 = 335 K
n = (2.90 •4.80) / (0.08206 • 335)
= 0.506 moles of gas
Therefore, 0.506 moles of gas are contained in the sample.
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Many ski resorts and mountain cities can be reached directly by planes which deposit travelers a mile or more above sea level. This can result in altitude sickness due to hypoxemia, or reduced oxygen in the blood, caused by the unaccustomed exposure to the lower atmospheric pressure at high elevations. On a given day, the prevailing atmospheric pressure in Albuquerque, NM (elevation 1620 meters) might be 0.799 atm. Calculate this pressure expressed in mmHg and in torr. Relationship between altitude and barometric pressure.
Answer:
See explanation
Explanation:
To convert from atm to mmHg
1 atm = 760 mmHg
0.799 atm = 0.799 atm * 760 mmHg/1 atm = 607.24 mmHg
To convert from atm to torr
1 atm = 760 torr
0.799 atm = 0.799 atm * 760 torr/1 atm = 607.24 torr
Help ASAP POINTS ARE ADDED !!!!!!due in 3 minutes
Proton:
Positive
Found in Nucleus
Mass of 1 AMU
Neutron:
Neutral
Found in Nucleus
Mass of 1 AMU
Electron:
Negative
Found in orbitals
Mass of 0 AMU
Which of the following statements is TRUE about salts
Answer:
salt is salty in taste.......
Multiple choice
In a given chemical reaction, 1 mol of sulfur reacts with 4 moles of chlorine.
4S + 2Cl2
S + 4 Cl2
S + 2Cl2
S + Cl2
Answer:
S + 4 Cl2
Explanation:
Sulphur - S
1 mol of Sulphur = S
Chlorine = Cl2
4 moles of Chlorine = 4Cl2
4S + 2Cl2
Incorrect option
S + 4 Cl2
Correct option
S + 2Cl2
Incorrect option
S + Cl2
Incorrect option
How many atoms are in 3.6 moles of titanium?
Answer:
69420
Explanation:
Answer:
We need to calculate number atoms, which can be determined as follows: We know that 1 mol contains 6.02214076×1023 number of atoms. i.e. is Avogadro's constant. Therefore the answer to the above question is that the number of atoms in 3.5 mol of Arsenic is 2.11×104 number of atoms.
Explanation:
Yea can you just help me out I don’t want to do this because I have other thing to do.I’m running out of point any suggestions on how to get more?
Answer:
the answer is d all of them are used
Answer:
all of them are correct types used/ mites
Explanation:
I did some research and apparently all of the above are types of insects used to determine time of death....but Im not 100% sure about mites( it Is said that they are used to provide forensically important information to estimate the post mortem interval, post berial interval, cause of death and relocation of dead body).
i hope this helps
help meeeeeeeeeeeeee
Answer:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
The coefficients are: 1, 2, 1, 2
Explanation:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
The equation can be balance as follow:
XCl₂ + AgNO₃ —> X(NO₃)₂ + AgCl
There are 2 atoms of Cl on the left side and 1 atom on the right side. It can be balance by writing 2 before AgCl as shown below:
XCl₂ + AgNO₃ —> X(NO₃)₂ + 2AgCl
There are 2 atoms of Ag on the right side and 1 atom on the left side. It can be balance by writing 2 before AgNO₃ as shown below:
XCl₂ + 2AgNO₃ —> X(NO₃)₂ + 2AgCl
Now, the equation is balanced.
The coefficients are: 1, 2, 1, 2
Which organ detects stimuli from the environment and is part of the nervous system?
Group of answer choices
A. eye
B. stomach
C. heart
D. lungs
It's the eye because it's the organ of sight
Use the picture to answer the question.
A red striped bowling ball with 3 finger holes.
Name at least three physical properties of the bowling ball.
Answer:
The bowling ball is red, has stripes, and has 3 finger holes.
Answer:
The shape of the bowling ball is round. The color of the bowling ball is red. The bowling ball is hard. The bowling ball is smooth.
Explanation: Hope I helped
.
Characteristics of a Group of Elements
Do not conduct electricity
• Mostly gas, but brittle when solid
Has 7 valence electrons
.
Which of these elements is in this groun?
Answer:
Gas
Explanation:
I dunno but a lucky guess i guess
2KClO₃ → 2KCl + 3O₂ If 25.0 g of KClO₃ decompose, what mass of O₂ will form? *
Answer: approximately 15.1 grams.
Explanation: The key to chemistry is to change everything to moles. Then when you have the answer in moles change the answer back to grams, liters, or whatever you want. Change 25 grams of potassium chlorate to moles. Chlorate is Cl with 3 oxygens. ate = saturated. Chlorine has seven valance electrons when it is saturated six of these electrons are used by oxygen ( 2 electrons per oxygen) leaving only 1 electron. 1 K x 39 grams/mole+1 Cl x 35.4grams/ mole+3 O x 16 grams/ mole = 122.4 grams / mole Potassium Chlorate 25 122.4 = moles. 2.05 moles of Potassium Chlorate. There is a 1:1 mole ratio. 1 mole of Potassium Chlorate will produce 1 mole of Potassium Chloride. 2.05 moles of Potassium Chlorate will produce 2.05 moles of Potassium Chloride. Find the gram molecular mass of Potassium Chloride. 1 K x 39 = 39+1 Cl x 35.4 = 35.4 = 74.4 grams / mole. 2.05 moles x 74.4 grams/ mole = 15.2 grams
The mass of O₂ that will be form is 9.8 grams
The chemical reaction is as follows:
2KClO₃ → 2KCl + 3O₂
From the reaction 2 moles of potassium trichlorate decompose to form 2 moles of potassium chloride and 3 moles of oxygen.
Therefore,
molar mass of KClO₃ = 39 + 35.5 + 48 = 122.5 grams
molar mass of O₂ = 32 grams
Therefore,
2(122.5) g of KClO₃ produces 3(32) grams of O₂
25 g of KClO₃ will produce ? grams of O₂
cross multiply
mass of O₂ produced = 96 × 25 / 245
mass of O₂ produced = 2400 / 245
mass of O₂ produced = 9.7959
mass of O₂ produced ≈ 9.8 grams
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What is the molality of a solution containing 18.2 g HCl and 250. g of water?
(EZ Points here)
Answer:
1.99M
Explanation:
Molality can be calculated by dividing the moles of solute by the mass of the solvent i.e.
Molality (M) = n of solute (mol) ÷ mass of solvent (kg)
Based on the information, mass of HCl (solute) = 18.2g, mass of solvent (water) = 250.0g
mole of solute = mass/molar mass
Molar mass of HCl = 1 + 35.5 = 36.5g/lol
mole = 18.2/36.5
mole = 0.499mol
Mass of solvent = 250.0g
In Kg, mass of water = 250/1000
= 0.250Kg
Molality = 0.499/0.250
Molality = 1.996
Molality of the solution = 1.99M
match each scientist with the description of the appropriate atomic theory
Bohr: Electrons move in circular paths that have different energies.
Thomson: Atoms contain electrons.
Dalton: Matter is made up of indivisible atoms.
Schrodinger and others: Electrons exist in a cloud of probability.
Rutherford: The mass of an atom is concentrated in its center.
Answer:
The screenshot shows all the answers
Explanation:
A rock sample from the moon includes a mineral that contains small amounts of the radioactive isotope Potassium-40 and its daughter element Argon-40 (half-life of 1.3 billion years). This mineral would not form with any Argon-40. Consider a crystal with 7 atoms of Argon-40 for every 1 atom of Potassium-40. How many atoms of Potassium-40 were present when the crystal formed for each atom of Potassium-40 that exists today
Answer:
There were originally 8 atoms of Potassium-40.
Explanation:
The half-life of a radioactive material is the time taken for half the original material to decay or the time required for a quantity of the radioactive substance to reduce to half of its initial value.
If the original material formed without any Argon-40, it means that the atoms originally present were Potassium-40 atoms.
Presently, there are 7 Argon-40 atoms for every 1 of Potassium-40, we can deduce the number of half-lifes the Potassium-40 has undergone as follows :
After one half-life, (1/2) there will be one Potassium-40 atom for every Argon-40 atom.
After a second half life, 1/2 × 1/2 = 1/4: there will be one Potassium-40 atom for every three atoms of Argon-40.
After a third half-life, 1/4 × 1/2 = 1/8: there will be one Potassium-40 atom for every 7 atoms of Argon-40.
Since there are 1/8 atoms of Potassium-40 presently, there were originally 8 atoms of Potassium-40.
Pl help it’s for a grade
Answer: B. Potential energy
Explanation:
There are several form of potential energy including gravitational, magnetic, electrical, chemical and eleastic potential
Answer:
Potential Energy
Explanation:
Potential energy is stored energy and the energy of position.
Chemical, Gravitational, and Elastic are all stored energy and the energy of position.
Hope this helps!
:D
1. Explain where they bury remains at the Forensic Osteological Research Center and why
Answer:
In the middle of the forest.
Explanation:
They have to bury the remains in the middle of the forest at the Forensic Osteological Research Center in order to study the decomposition of the dead person. By studying the decomposition of dead person we can get a lot of information which can be used in the study of criminal cases and solving of crimes. The middle place in the forest is a perfect place to bury the remains due to presence of huge amount of microbes as well as insect that helps in the decomposition.
What is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution?
Answer: the answer is 12M
Explanation: 3.0mol/ 0.25L =12M
12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.
What is molarity?The amount of molecules of molecules divided by the quantity of liters in solution is the definition of molarity, a concentration unit in chemistry. It is crucial to comprehend how it is calculated as well as when to employ it in comparison to other units because it is among the most widely used concentration units.
A chemical solution's concentration is measured in molarity (M). It refers to the solute's moles per liter of solution. To be clear, this is not the same as the liters of solvents (a common mistake).
molarity = number of moles of solute/ volume of solution in litre
molarity =3.0mol/ 0.25L
=12M
Therefore, 12M is the molarity of a solution made from dissolving 3.0 moles of Saline (NaCl) in 0.25 L of solution.
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iron and carbon:steel:copper and tin:___________
Answer:
iron and carbon:steel:copper and tin: metal