Answer: 15mol O2 x 1mol CH4 / 2mol O2 = 7.5 mol CH4
Answer: 7.5 mol
Explanation:
Determine the number of atoms of O in 22.3 moles of Al2(CO3)3.
Answer:
8.05 x 10^25 atoms O
Explanation:
moles O = moles Al2(CO3)3 x (6 moles O/1 mol Al2(CO3)3) = 22.3 x 6 = 133.8 moles O
atoms O = moles O x Avogadro number = 133.8 x 6.02 x 10^23 = 8.05 x 10^25 atoms O
Which of the following statements about complete metamorphosis is TRUE?
The adult form of the animal is similar to the young animal.
Only arthropods undergo complete metamorphosis.
All organisms that undergo complete metamorphosis are a caterpillar at some time.
The physical form of the young animal is completely different than the physical form of the adult.
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The true statement about metamorphosis is the physical form of the young animal is completely different from the physical form of the adult.
What is metamorphosis?Metamorphosis is the change in the structure of the animal in several stages until it changes into an adult form.
Animals that undergo metamorphosis are amphibians, insects, mollusk, crustaceans, fishes, etc.
The changes that occur in every stage are shape, nutrition form, behavior, etc.
The importance of metamorphosis is to change in every stage to reduce competition for food, predators, etc.
Thus, the correct option is D.
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what happens when an electrolyte, NaCl is added to hydrate ferric oxide solution
Answer:
hydrated ferric oxide is ferric hydoxide sol and is positively charged. When aqueous solution of NaCl is added to it,the Cl- ions neutralise the positive charge on the sol particles. In the absence of charge, brown precipitate is formes due to colloids can be coagulation of particles.Nov 11, 2020
Explanation: hope this help
12. lithium + hydrochloric acid
lithium chloride + hydrogen
Balance
Answer:
Li + HCl = LiCl + H2 - Chemical Equation Balancer.
Explanation:
Knowing that Boyle's Law is P1V1 = P2V2, How would we rearrange the formula if we needed to solve for P1?
A. P1 = V1 -P2
B. P1 = P2V2 - V1
C. P1 = P2V2/V1
D. P1= V1/V2
Answer:
your answer is C
Explanation:
because when u make P1 the subject formula then P2 V2 will be divided with V1
I need help!!!!!!! please
Answer:
A. bacteria
Explanation:
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How many moles of Csl are in 82.0 grams of Csl?
Answer:
.315mol CsI
Explanation:
CsI has a molar mass of 260 g/mol. This means that one mole of cesium iodide has a mass of 260 grams. We can use stoichiometry/dimensional analysis to figure out how many moles is equal to 82 grams.
[tex]82.0g CsI (\frac{1 mole}{260g} ) = .315mol CsI[/tex]
Based on Table F, which compound is least soluble in water?
1. AIPO4
2. Li2SO4
3. Ca(OH)2
4. AgC₂H₂O2
Based on Table F, the chemical compound which is least soluble in water is: 1. [tex]AlPO_4[/tex].
What is solubility?Solubility can be defined as a terminology that describes how readily a chemical substance or compound can be dissolved in a solvent to form a solution.
In Chemistry, a chemical substance or compound is said to be soluble if it dissolves completely in a solvent such as water.
Based on Table F, the chemical compound which is least soluble in water is [tex]AlPO_4[/tex] because phosphates are generally insoluble.
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Boyle's Law states that when a sample of gas is compressed at a constant temperature, the pressure P and volume V satisfy the equation PV = C, where C is a constant. Suppose that at a certain instant the volume is 100 cm3, the pressure is 150 kPa, and the pressure is increasing at a rate of 30 kPa/min. At what rate is the volume decreasing at this instant?
Answer:
The volume is decreasing at a rate of 30 cm³/min.
Explanation:
From the question given above, pressure (P) and volume (V) are related by the following equation
PV = C
C => constant
If we make P the subject of the above, we shall have:
P = C/V
From the equation above (i.e P = C/V),
We can say that P is inversely proportional to V. This implies that as P is increasing, V will be decreasing and also, as P is decreasing, V will be increasing.
Considering the question given above, the pressure (P) is increasing at a rate of 30 kPa/min. Therefore, the volume will be decreasing at a rate of 30 cm³/min.
How many moles are in 4.3x10 23atoms of iron?
Answer:
[tex]\Large \boxed{\sf 0.714 \ moles}[/tex]
Explanation:
Avogadro's number can be used as a conversion factor from atoms to moles or moles to atoms.
[tex]\displaystyle \frac{4.3 \times 10^{23}}{6.022 \times 10^{23} } =0.714048[/tex]
A 75 L container holds 62 moles of gas at a temperature of 215 0C. What is the pressure in atmospheres inside the container?
Answer:
33
Explanation: first change the temperature in degree celcius to kelvin by adding 273 to 215 which makes 488 then input value into the formula pv=nrt p*75=62*0.08206*488 then divide both sides by 75 you get 33
The pressure of gas in the atmosphere is equal to 33.1 atm.
What is the ideal gas equation?The ideal gas law can be described as an equation of the state of a hypothetical ideal gas. This law states that the multiplication of the volume and pressure of one gram molecule of an ideal gas is equal to the product of the gas constant and absolute temperature.
The mathematical equation of the ideal gas law can be written as:
PV = nRT
where V is the volume, P is the pressure, n is the amount of substance and R is the gas constant.
Given the volume of the gas, V = 71 L
The number of moles of gas, n = 62
The temperature, T = 215 °C = 273 + 215 = 488 K
The value of the universal gas constant, R = 0.082 atm L/K mol
After substituting the all values in the ideal gas equation, we get:
P × 71 = 62 × 0.082 × 488
P = 33.1 atm
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How do computers play a role in meteorology? Select three options.
They use equations to predict future weather.
They collect data from weather stations.
They draw weather maps.
They measure temperature, humidity, and wind speed.
They send out microwaves to make radar measurements.
Answer:
a b c :]
Explanation:
Computers play a role in meteorology by equating to;
predict future weather,collect data and draw weather maps etc.Computers in MeteorologyThere options that best describe computers in Meteorology above are:
They use equations to predict future weather.They collect data from weather stations.They draw weather maps.Read more on Meteorology:
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Which formula represents an ionic compound?
A) H20
B). KCI
C) CO2
D) CHE
Answer: B) KCl
Explanation: Potassium chloride, KCl , is an ionic compound formed by the electrostatic force of attraction that holds the potassium cations and the chlorine anions together. Potassium, K , is located in group 1 of the Periodic Table.
I need the answers to those 2 :) don’t explain just answer :D
Answer:
where is the question?
Explanation:
When 136g of glycine are dissolved in of a certain mystery liquid , the freezing point of the solution is lower than the freezing point of pure . On the other hand, when of sodium chloride are dissolved in the same mass of , the freezing point of the solution is lower than the freezing point of pure . Calculate the van't Hoff factor for sodium chloride in . Be sure your answer has a unit symbol, if necessary, and round your answer to significant digits.
The given question is incomplete. The complete question is:
When 136 g of glycine are dissolved in 950 g of a certain mystery liquid X, the freezing point of the solution is 8.2C lower than the freezing point of pure X. On the other hand, when 136 g of sodium chloride are dissolved in the same mass of X, the freezing point of the solution is 20.0C lower than the freezing point of pure X. Calculate the van't Hoff factor for sodium chloride in X.
Answer: The vant hoff factor for sodium chloride in X is 1.9
Explanation:
Depression in freezing point is given by:
[tex]\Delta T_f=i\times K_f\times m[/tex]
[tex]\Delta T_f=T_f^0-T_f=8.2^0C[/tex] = Depression in freezing point
[tex]K_f[/tex] = freezing point constant
i = vant hoff factor = 1 ( for non electrolyte)
m= molality =[tex]\frac{136g\times 1000}{950g\times 75.07g/mol}=1.9[/tex]
[tex]8.2^0C=1\times K_f\times 1.9[/tex]
[tex]K_f=4.32^0C/m[/tex]
Now Depression in freezing point for sodium chloride is given by:
[tex]\Delta T_f=i\times K_f\times m[/tex]
[tex]\Delta T_f=20.0^0C[/tex] = Depression in freezing point
[tex]K_f[/tex] = freezing point constant
m= molality = [tex]\frac{136g\times 1000}{950g\times 58.5g/mol}=2.45[/tex]
[tex]20.0^0C=i\times 4.32^0C\times 2.45[/tex]
[tex]i=1.9[/tex]
Thus vant hoff factor for sodium chloride in X is 1.9
Which bond occurs between two metal atoms?
Answer:
An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
Answer:
Hi! An ionic bond is a type of chemical bond formed through an electrostatic attraction between two oppositely charged ions. Ionic bonds are formed between a cation, which is usually a metal, and an anion, which is usually a nonmetal. A covalent bond involves a pair of electrons being shared between atoms.
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Explanation:
A student said, "You can't see the full Moon during the day because it rises close to sunset."
Which diagram supports this statement? (Diagrams are not to scale. You are looking down from
a north polar view fisa person standing on Earth at sunset.)
Oq. Ooo
Ooo
OD
ОА
OB
ОС
OD
Answer:
I think it would be B.
Explanation:
What is the unit for force?
Joules
Watts
Newtons
Kilograms
Answer:
Newton
Explanation:
A force is measured in terms of the acceleration it gives a standard mass. The SI unit of force in physics is named after the father of physics; Newton.
A chemist titrates 50.0 mL of a 0.1333 M benzoic acid (HCH,CO2) solution with 0.2560M NaOH solution at 25 °C. Calculate the pH at equivalence. The
PK, of benzoic acid is 4.20.
Round your answer to 2 decimal places.
Note for advanced students: you may assume the total volume of the solution equals the initial volume plus the volume of NaOH solution added.
DH-0
5
?
What is true about the position of any metal in the periodic table
Answer:
The metals are on the bottom left in the periodic table, and the nonmetals are at the top right. The semimetals lie along a diagonal line separating the metals and nonmetals. The elements are arranged in a periodic table, which is probably the single most important learning aid in chemistry.
Explanation:
im not sure if there was supposed to options to that question or not
what are the three components of a chemical formula?
Answer:
The three components of a chemical formula are the empirical formula, the molecular formula, and the structural formula.Hope this answer helps.
Which of the following apply to concentration?
Answer:Concentration of products can vary.
As more solute dissolves, more ions form; but the volume in which they are contained does not change.
Concentration of the solid phase does not change.
Explanation:
Explain about Bose-Einstein condensate.
Answer:
A Bose-Einstein condensate or BEC in simple words is a group of atoms cooled near absolute zero.
What does electronegativity mean?
Answer:
Electronegativity refers to the ability of an atom to attract shared electrons in a covalent bond. The higher the value of the electronegativity, the more strongly that element attracts the shared electrons.
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HELPP PLZZZ
What is the thermal energy of an object?
the total kinetic and potential energies of all its particles
the strength of the strong nuclear force in all of its atoms
the total potential energy of its particles
its total temperature
Answer:
the total kinetic andd potential energies of all its particles
Explanation:
other brainly questions
Answer:
Hey mate....
Explanation:
This is ur answer....
The thermal energy of an object is the energy contained in the motion and vibration of its molecules. Thermal energy is measured through temperature. The energy contained in the small motions of the object's molecules can be broken up into a combination of microscopic kinetic energy and potential energy.
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Would an object with a higher specific heat absorb more or less energy when heated?
Answer:
less
Explanation:
the more heat it has, the less a given heat will affect it
Answer:
more heat
Explanation:
9. The materials are carried in a cell by the _________________________. *
Answer:I dont know about this one
Explanation:
Glven 4.62 mol of sodium hydroxide, NaOH, how many grams are present?
According to the mole concept , there are 184.8 grams in 4.62 moles of sodium hydroxide.
What is a mole?Mole is defined as the unit of amount of substance . It is the quantity measure of amount of substance of how many elementary particles are present in a given substance.
It is defined as exactly 6.022×10²³ elementary entities. The elementary entity can be a molecule, atom ion depending on the type of substance. Amount of elementary entities in a mole is called as Avogadro's number.
It is widely used in chemistry as a suitable way for expressing amounts of reactants and products.For the practical purposes, mass of one mole of compound in grams is approximately equal to mass of one molecule of compound measured in Daltons. Molar mass has units of gram per mole . In case of molecules, where molar mass in grams present in one mole of atoms is its atomic mass.Number of moles is given as, mass/ molar mass
∴mass=number of moles×molar mass
On substitution, mass= 4.62×40=184.8 g
Thus, there are 184.8 g in 4.62 mole of sodium hydroxide.
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How does distance affect the brightness of a light? Please answer fast im doing a test.
(っ^-^ )っ Hey There!
Answer → As light travels a certain distance, the intensity of the light will decrease by a square of the distance.
Why → The farther away the light is the dimer it gets but the close light gets the bright it gets
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Which characteristic is most likely found in a nuclide that is radioactive and synthetic?
an atomic number of 30
a mass number of 30
an atomic number of 94
a mass number of 94
Answer:
An atomic number of 94
Explanation:
Just took the practice