The freezing point depression of of 17.1 grams of sucrose in 500.0 grams of water is −0.186°C.
A solution's freezing point is lower than that of the pure solvent's.
The term "freezing point depression" is used to describe this phenomena.
DT = (Kf) is the formula for the freezing point depression (m)
The freezing point depression is represented by T f = T° f - ΔT
The pure solvent's freezing point is T°f.
The solution's freezing point is ΔTf.
Kf is the solvent's molal freezing point depression constant.
The value of Kf is typical for the particular solvent.
Kf is measured in °C/m units.
The solution's molality is given by m.
m is the amount of solute per kilogram of solvent.
m = kilogram of solvent/moles of solute
The molecular weight of sucrose is
12(12.01) + 22(1.01) + 11(16.00) = 342.34 g/mole
The number of moles of Sucrose = 17.1 / 342.34 = 0.05moles
and the concentration of the solution in moles per kilogram of water is
0.05 moles / 0.500 kg H₂O = 0.1 molal
By taking the freezing point constant for water as 1.86
Δ T f = 1.86°C/m × 0.1 m
Δ T f = 0.186
Because the freezing point of pure water is 0°C, the sucrose solution freezes at –0.186°C.
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Complete Question -
What is the freezing point depression of of 17.1 grams of sucrose
(C12H22O11) in 500.0 grams of water?
Cells in different tissues or organs (skin, eye, bone, etc.) contain different DNA. true or fasle,?
Answer:
false
Explanation:
trust
Answer:
True
Explanation:
Because they require different things and have different functions
PLEASE HELPPP WILL GIVE BRAINLIEST!!!
Answer:
placental mammals
Explanation:
Answer:
B) placental mammals
Explanation:
Can someone please help
Answer:
1. c) shiny
2) True. Reactivity is a chemical property.
1. A metal is shiny
2. yes
that's all
How does the heart keep the blood flowing throughout the body?
It contracts and relaxes
It inflates and deflates
It inhales and exhales
It opens and closes
Answer:
b
Explanation:
Answer:
It contracts and relaxes awnser is a
Explanation:
im from flvs
Calculate the molecules in 9.78 moles of oxygen gas
Calculate the number of grams in 2.44e26 molecules of carbon dioxide, CO?
How many atoms are in 3.73e-2 moles of potassium
How many moles are in 11.8 grams of Barium?
Calculate the number of particles in 43.2 grams of N2O
The chemical formula for aspirin is C9H8O4. What is the mass in grams of 0.60 moles of aspirin
Answer:
i am quite unsure what you want me to answer but if you explain it to me w ould live to help
Explanation:
I NEED HELP PLEASE THANK YOUUU
I think the answer is c if not then try a
Answer: B
Explanation:
Calculate the molarity 14.1 moles of FeCl3 dissolved in 2350 ml of solution
read the given chemical reaction c2h6 +o2 --> co2 +h20 how many moles of co2 are produced during the complete combustion of 3.6 moles of c2h6? 1.8 moles 4.4 moles 7.2 moles 9.2 moles
Answer:
c) 7.2 moles
Explanation:
7.2 moles of [tex]CO_2[/tex] are produced during the complete combustion of 3.6 moles of [tex]C_2H_6[/tex]. Hence, option C is correct.
What are moles?A mole is defined as 6.02214076 ×[tex]10^{23}[/tex]
of some chemical unit, be it atoms, molecules, ions, or others. The mole is a convenient unit to use because of the great number of atoms, molecules, or others in any substance.
Balance your chemical reaction first.
[tex]2C_2H_6 + 7O_2[/tex] —> [tex]4CO_2 + 6H_2O[/tex]
2 moles of [tex]C_2H_6[/tex] produce 4 moles of [tex]CO_2[/tex].
So, 3.6 moles of [tex]C_2H_6[/tex] produce= (4÷2)x3.6 =7.2 moles
Hence, 7.2 moles of [tex]CO_2[/tex] are produced during the complete combustion of 3.6 moles of [tex]C_2H_6[/tex].
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A sample of oxygen gas occupies a volume of 250 mL at .8 atm of pressure. What volume will it occupy at 1.2 atm of pressure?
what is 606 as a 2 sig fig answer?
6, 0
thats the answer, i hope it helps
How many meters are in 65 millimeters?
Answer:
0.065 meters
Explanation:
Answer:
Start by dividing the length value by 1000, so that would be
65 / 1000 = 0.065 meters
Describe the difference between a flask, beaker, and graduated cylinder.
How does the purpose of each differ?
Answer:
Both graduated cylinders and beakers are pieces of laboratory glassware that have a specific function. Graduated cylinders typically are more accurate at reading the volumes of the liquid inside. Beakers are better for stirring and mixing liquids.
Flasks are notable for their unique shape: a rounded vessel and a cylindrical neck. The main differing characteristic between a flask and a beaker is that beakers have straight sides, rather than slanted sides like a flask. Beakers are mainly for measuring and transporting liquids from one site to the next.
Explanation:
hope this helps!!!!
The hot liquid substance that is inside the earth is referred to as lava or magma?
Answer:
magma
Explanation:
i did a test on it
The hot liquid substance that is inside the Earth is referred to as magma.
If this is incorrect, please, don't refrain to tell me. Thank you.
How are hydrogen atoms arranged in ethene? in -different planes, separated by angles of 180° in -the same plane, separated by angles of 120° in -the same plane, separated by angles of 1800 in -different planes, separated by angles of 1200
Answer:
Explanation:
How best to demonstrate the equivalence of hydrogens in
H 2 C = C H 2 ?
1 H NM R spectroscopy would be the best way to show this. The 4 hydrogens give the one signal.
Explanation:
1. Determine the pH of the following solutions:
a. 1 x 10-3 M HCI
please refer to the attachment
Hope This Helps You ❤️
Answer:
HCI is a strong acid : HCI -> h^+ + CI^- [ H^+ ] = 1.0 x 10 ^-3 -> pH = -log[ H^+ ] = -log 10 ^-3 = 3
Explanation:
A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. with the law of conservation of mass because the mass of reactants A 12.8-g sample of sodium completely reacts with 19.6 g of chlorine to form 32.4 g of sodium chloride. These data are blank with the law of conservation of mass because the mass of reactants blank the mass of products. the mass of products.
Answer: The data are consistent with the law of conservation of mass because the mass of reactants equals the mass of products
Explanation:
According to the law of conservation of mass, mass can neither be created nor be destroyed. Thus the mass of products has to be equal to the mass of reactants. The number of atoms of each element has to be same on reactant and product side. Thus chemical equations are balanced.
Given: mass of sodium = 12.8 g
mass of chlorine = 19.6 g
mass of reactants = mass of sodium + mass of chlorine = 12.8 g + 19.6 g = 32.4 g
Mass of product = Mass of sodium chloride = 32.4 g
As mass of reactant = mass of products , Thus results are in accordance with the law of conservation of mass.
6. A container has a volume of 53.9 L. Assuming it is at STP, how many moles of gas particles does it contain?
Answer:
2.41 mol
Explanation:
53.9 L x 1 mol/22.4 L = 2.41 mol
Name the gases that mostly compose the atmosphere.
O Argon and Carbon Dioxide
O Oxygen and Carbon Dioxide
Oxygen and Nitrogen
Carbon Dioxide and Nitrogen
Explanation:
Oxygen and Nitrogen. is the correct pair.
Read the temp what is it?
6 a What does the sacrificial protection of iron mean?
b Both magnesium and zinc can be used for it. Why?
c But copper will not work. Explain why.
Explanation:
A-Corrosion
B- Magnesium helps ur body regulates its zinc levels and zinc absorbs into absorbs magnesium more efficiently
What is the answer to this?
the answer is A.
the scientist used mud and vinegar to make a model of the volcano.
Calculate the volume of 150kg of chlorine gas at room temperature and pressure. The volume of one mole of gas at room temperature and pressure is 24.0dm^3. Relative formula mass (Mr): Cl2=71
Answer:
Given mass 150 kg= 150000 gram
molar mass 71 gram
number of moles = given mass/molar mass
= 2112.76 moles
1 mole = 24 Dm³
2112.76 mole =24×2112.76= 50706.24 Dm³
The volume of the mole of gas at room temperature and pressure is 50,704.08dm³
We need to first calculate the number of moles of Chlorine gas (Cl₂)
Number of moles = Mass/Molar mass
Given the following parameters
The molar mass of Cl₂ = 71g/mol
Mass of chlorine gas = 150kg = 150,000g
Get the number of moles
[tex]n=\frac{150,000}{71}\\n=2,112.67moles\\[/tex]
Given that volume of 1 mole at STP = 24.0dm³
2112.67 moles = x
Get the volume of the chlorine gas at STP.
Volume of Cl₂ at STP = 24 × 2112.67
Volume of Cl₂ at STP = 50,704.08dm³
Hence the volume of the mole of gas at room temperature and pressure is 50,704.08dm³
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What happens with electrons in a non-polar bond?
Brainliest!!!!!!!
Answer:
In a nonpolar covalent bond, the atoms share electrons equally with one another.
Explanation:
Nonpolar covalent bonds are a type of bond that occurs when two atoms share a pair of electrons with each other. These shared electrons glue two or more atoms together to form a molecule.
What is the Great Red Spot on Jupiter?
Answer:
The Great Red Spot is a storm in Jupiter's southern hemisphere with crimson-colored clouds that spin counterclockwise at wind speeds that exceed those in any storm on Earth. The Great Red Spot has slowly changed over the years, and is currently about 1.3 times as wide as our planet.
Which phrase best describes an individual organ?
O A. The simplest unit of life
O B. Made of different kinds of tissues
C. Made of one kind of cell
O D. Meets all the needs of an organism
Answer:
made of different kinds of tissues
Explanation:
cause that's the only one that makes sense because it goes: cell, tissues,organ,organ system , organism
1. the simplest unit of life - cell
2. a individual organ - would be made of different kinds of tissues
3. tissues - would be made of one kind of cell
4- an organ system - meets all the needs of a organism
also it wouldn't make sense for a individual organ to be made of only one kind of cell so yeah
good luck :) I hope this was right
Rank from largest to smallest equilibrium constant. To rank items as equivalent, overlap them KBr2, KCl2, KI2
Answer:
KCl[tex]_{2}[/tex], > KBr[tex]_{2}[/tex], > KI[tex]_{2}[/tex]
Explanation:
KBr[tex]_{2}[/tex], KCl[tex]_{2}[/tex], KI[tex]_{2}[/tex]
The equilibrium constant for the reaction between Alkene and Halogen to give Alkyl halide as a product
Keq = [tex]\frac{[C2H4X2 ]}{[C2H4 ][ X2]}[/tex]
hence the order of equilibrium from the Largest to the smallest equilibrium
= KCl[tex]_{2}[/tex], > KBr[tex]_{2}[/tex], > KI[tex]_{2}[/tex]
El mercurio ha sido utilizado como elemento para medir la temperatura porque Es una mezcla. Al aumentar la temperatura se dilata con facilidad. Es un buen conductor del calor. Es un buen conductor de la electricidad.
Answer:
La respuesta correcta es: Al aumentar la temperatura se dilata con facilidad
Explanation:
El mercurio (Hg) es un elemento metálico que a temperatura ambiente es un líquido. Tiene la propiedad de dilatarse con facilidad al aumentar la temperatura, propiedad que ha sido utilizada en los termómetros de mercurio. En estos termómetros, el mercurio está dentro de un tubo de vidrio graduado con un bulbo para transmitir el calor. Al estar en contacto con un cuerpo más caliente (a mayor temperatura), el mercurio del interior del termómetro se dilata (expande su volumen) y asciende por el tubo indicando la temperatura correspondiente, graduada en el vidrio.
What is the H 2 : H2O molar ratio?
Answer:
The ratio of hydrogen atoms to oxygen atoms used to make water molecules is always 2:1, no matter how many water molecules are being made.
Explanation:
how many moles of water is 5.02 x 10 18 molecules of water
Answer:
8.334×10^-6 moles
Explanation:
a mole is 6.023×10^23
5.02×10^18 ÷ 6.023×10^23=8.33×10^-6
so there are 8.33×10^-6 moles of water in 5.02x10^18 molecules of water
The number of moles of water in which 5.02 × 10¹⁸ molecules of water is present is 8.33 × 10⁻⁶.
What is moles?
Moles is a unit which is used to tells about the quantity of any substance, in one moles of any substance 6.023 × 10²³ number of atoms of that substances are present.
In 1 mole of water = 6.023 × 10²³ number of molecules of water is present
So, number of 5.02 × 10¹⁸ molecules of water present in how many moles will be calculated as:
Required moles = 5.02 × 10¹⁸ / 6.023 × 10²³ = 8.33 × 10⁻⁶
Hence, required moles is 8.33 × 10⁻⁶.
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The liquid metal at room temperature (a) Mercury (b) Sodium (c) Magnesium (d) Silver
Answer:
(a) Mercury
Explanation:
Mercury with chemical symbol (Hg) is also regarded as " quicksilver". It is heavy and silvery in nature and belongs to d-block of the periodic table, it is metallic element and it is liquid at standard conditions of (temperature and pressure). It has Boiling point of about 356.7 °C with Atomic number of 80. It can molten above the temperature of ( −38.8 °C)