10.00g of hydrated sodium sulfate decomposes to form 4.40g Na(2)SO(4).xH(2)O -> NaSO(4) + xH(2)O of anhydrous sodium sulfate on heating. What’s the formula mass of hydrated sodium sulfate and the value of x?
please help i have no clue!
Answers
X=10
Explanation and workout is in the photo attached with this answer
The formula mass of hydrated sodium sulfate is Na₂SO₄.10H₂O. The value of x is equal to 10.
What is the mole concept?A mole is the amount of substance containing the same number of elementary entities as the number of atoms present in a pure sample of any element.
A mole is also described as the amount of a substance that contains 6.022×10²³ fundamental entities of the given substance.
The mole concept is a convenient method of representing the amount of a substance.
Given, the mass of the hydrated sodium sulfate = 10.0g
The mass of the anhydrous sodium sulfate is produced = 4.40g
Mass of the water evaporated as water on heating = 10.0 - 4.40 = 5.6g
The number of moles of water = 5.6/18 = 0.31 mol
Similarly, the number of moles of sodium sulfate = 4.4/142.04 = 0.031 mol
The ratio of the number of the moles of the sodium sulfate and water:
[tex]\frac{n(H_2O)}{n(NaSO_4)}=\frac{0.31}{0.031} = 10[/tex]
Therefore, the ten moles of water will be evaporated for the one mole of sodium sulfate. Therefore, the formula mass is Na₂SO₄.10H₂O.
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Related Questions
Can someone give me Two methods for monitoring and minimizing a human impact on the environment?
Answers
ain the energy transformation that occurs when a hair dryer is plugged in and turned on.
Group of answer choices
Chemical energy transforms into electrical and sound energy.
Electrical energy transforms into mechanical and thermal energy.
Mechanical energy transforms into chemical and electrical energy.
Thermal energy transforms into electrical and gravitational energy.
Answers
Answer:
Mechanical
Explanation:
Since, this mechanical energy gets converted into thermal energy due to which hairs get dry. Thus, we can conclude that the energy transformation that occurs when a hair dryer is plugged in and turned on is that electrical energy transforms into mechanical and thermal energy.
A Rectangular Prism has a height of 4cm, a width of 5cm, a length of 1.2 cm, and a mass of 85,000 g. What is it's density?
A. .00000035416 g/cm3
B. 00035416 g/cm^3
C. 354.16 g/cm^3
D. 3541.6 g/cm
Answers
Answer:
The answer is D.
Explanation:
Volume (V) = l x w x h
V = 4 x 5 x 1.2
V = 20 x 1.2
V = 24
Density = Mass/Volume or D = M/V
D = 85,000/24
D = 3541.66666666
In the formation of an ionic compound a metal atom is most likely to __________ valence electrons
Answers
Answer:
To lose valence electrons.
Explanation:
Hand warmers and instant cold packs use _____ that release or absorb thermal energy.
Answers
Answer:
Hand warmers and instant cold packs use Endothermic that release or absorb thermal energy.Hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.
What is thermal energy?Thermal energy is defined as by virtue of its temperature, a system in a condition of thermodynamic equilibrium contains internal energy. Fossil fuels like natural gas, coal, and oil are examples of thermal energy sources. They also include solar heat, electric heat pumps, and geothermal heat. Thermal energy is a type of kinetic energy, which is energy brought on by motion, and is brought on by the motion of particles. Things have an interior temperature as a result of thermal energy, which can be detected with a thermometer.
Endothermic reaction is defined as the chemical processes that result in the formation of products when the reactants absorb heat energy from their surroundings. A chemical reaction or physical change is referred to as being endothermic when heat is absorbed by the system from the environment. An endothermic process causes the system to absorb heat from its surroundings, which causes the surroundings' temperature to drop.
Thus, hand warmers and instant cold packs use endothermic reaction that release or absorb thermal energy.
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What do all the molecules in the table have in common?
Answers
Answer:
They all consist of the same amount of protons, electrons, and neutrons in an element.
Explanation:
For example in water (H20) contains 1 atom of protons, 1 atom of electrons and 1 atom of neutrons.
Plants combine water (liquid) and carbon dioxide (gas) to make sugar (solid) during photosynthesis. This is an example of__.
Answers
Answer:
Explanation:
It' an example of photosynthesis and plants make oxygen and suger (glucose). Hope this helped
What is the pH of a solution if [H+] = 1.0 x 10-5M? *
1 point
5.00
7.00
11.00
50.0
Answers
Answer:
5.00
Explanation:
because ignoring the pH solution part and doing the math it comes around to 1.0x5.0 which 1 times anything is itself so its 5
please helllllllllllllllllllllllllllllllp
Answers
So what you dos is the final temperature - the initial temperature. For example for 1) we have 88.5 celsius degrees - 78 celsius degrees = 10.5 celsius degrees.
An object experiences a net force to the right that gives it an acceleration of 2.0 m/s2. If the net force is doubled then the new acceleration of the object will be ???
Answers
Answer:
The acceleration of an object as produced by a net force is directly proportional to the magnitude of the net force, in the same direction as the net force, and inversely proportional to the mass of the object.
Which of the following actions will not increase the rate at which a solid dissolves in
a liquid?
using smaller particles of the solid
O lowering the temperature of the system
O increasing the surface area of the solid
stirring the solid and the liquid
Answers
Answer:
O lowering the temperature of the system
3. Which part of a cell is not found in the cytoplasm?
a. chromosomes
b. Golgi body
c. ribosome
d. vacuole
Answers
Answer:
vacuole
Explanation:
Brainliest please
the maximum internal receiving temperature for fresh poultry is:
Answers
It should be noted that the maximum internal receiving temperature for fresh poultry is 41°F.
Temperature simply refers to the measure of hotness or coldness which is expressed in several scales. It's the manifestation of thermal energy in a matter.
It should be noted that the key to limiting the bacterial growth of food is to control the temperature. The maximum acceptable receiving temperature for fresh poultry is 5°C (41°F).
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A person has a mass of 80.0 kg on
Earth, what would their mass be on
Mercury, which has 1/3 the gravity of
Earth?
A. more than on the Earth
B. less than on the Earth
C. the same as on earth
Answers
Answer:
The same as on earth
Explanation:
mass is the amount of matter in an object and the mass of an object is always the same at any point in time
gravity will only have effect on the weight and not the mass.
so assuming the question was talking about the weight, then we can say the weight will be lesser on Mercury
Which of the following is the equation for wave speed?
Answers
Answer:
[tex]{ \boxed{ \mathfrak{ \: answer : \: { \bf{v = f \lambda}} }}}[/tex]
v is the wave speedf is frequencylambda is wave length1. Write down two ways in which a mountain can be worn away.
Answers
Answer:
Gale force winds, lightning strikes, temperature extremes and a deluge of snow, hail or rain. These combined forces break up the rocks and erode the peaks into their stark, sculpted forms.
Explanation:
. A car accelerates at a constant rate in a straight line.
The velocity of the car increases from 4.9 m/s to 6.4 m/s in 3.00 minutes.
Calculate the acceleration of the car.
Give your answer to 3 significant figures.
Answers
Answer:
The acceleration of the car is 0.0273.
Explanation:
We can find this by using the acceleration formula which is:
a = ( vf - vi ) / Δt
a is acceleration.
vi is the initial velocity.
vf is the final velocity.
When we substitute into the equation we get. . .
a = ( 6.4 - 4.9 ) / 3
and when we solve this equation we get 0.02734
Hope this helps. . . <3
In a compound, chemical energy is _______________ when bonds break.
a
absorbed
b
released
c
both A and B
d
neither A or B
Answers
Help on this question please
Answers
Answer:
Option 4
Explanation:
Velocity is the rate at which the position changes
24.) In humans animals and plants the DNA is found in the?
Answers
Answer:
chromosome
Explanation:
Answer:
Most of the DNA in all animals, humans, and plants is found in the cell nucleus. Humans, animals and plants contains both DNA and RNA in the cell nucleus and they have to be present in all because every organisms structure and function directly depends upon them.
Explanation:
Plz help ASAP
Dgdhhd
Answers
Answer:
Same As.
Explanation:
Mass will not increase or decrease because matter is not created or destroyed. The Law of Conservation of Mass states that the mass of a system must remain constant throughout. Energy is conserved.
Heavy rains fill a reservoir, causing the dam that holds the water to break. As a result, the areas downstream are suddenly flooded. Which question would a
scientist seek to answer?
A. What will be the long-term effect of the flood on the plants and
animals in the area?
B. Who was responsible for the design flaw in the dam?
C. What changes in regulations are needed to prevent future dam
failures?
D. How much money should be spent to ensure dam safety?
Answers
I need helppppppppppp
Answers
A B C
a. Mg(12) 2.8.2 -2e- = Mg2+
b. S(16) 2.8.6 +2e- = S2-
c. MgS
d. No, because it is neutral
MARKING BRAINLIEST :)
Which property has a trend similar to that of electronegativity?
A. First ionization energy
B. Atomic radius
C. Ionic radius
D. Atomic mass
Answers
Answer:
a
Explanation:
There are various kind of elements that are present in periodic table. Some elements are harmful, some are radioactive, some are noble gases. Therefore, the correct option is option A.
What is periodic table?Periodic table is a table in which we find elements with properties like metals, non metals, metalloids and radioactive element arranges in increasing atomic number.
Periodic table help a scientist to know what are the different types of elements are present in periodic table so that they can discover the new elements that are not being discovered yet.
Along period, electronegativity increases. along group electronegativity decreases. The same trend is followed by first ionization energy in periodic table.
Therefore, the correct option is option A.
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The density of butter is 0.86 g/cm3. what is the mass of 240 cm3 of butter?
Answers
Answer:
mass= 206.4 g
Explanation:
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
The density of butter is 0.86 g/cm³. 206.4g is the mass of 240 cm³ of butter. The phrase "specific volume" is occasionally used in thermodynamics to refer to a substance's reciprocal of its density.
Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre. For example, the density of water is 1 gram per cubic centimetre, and Earth’s density is 5.51 grams per cubic centimetre. Density can also be expressed as kilograms per cubic metre (in metre-kilogram-second or SI units). For example, the density of air is 1.2 kilograms per cubic metre.
Density= mass/volume
0.86=x/240
x=240×0.86
=206.4g
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Explain why sodium loses one electron and chlorine gains one electron in three or more sentences.
Answers
Answer:
Sodium and chloride form an ionic bond. Therefore the sodium atom loses one electron from its outer shell and the chlorine atom gains one electron. As this happens, the electron is transferred from the sodium atom to the chloride atom and so both atoms become ionic and have a full outer shell.
A sturdy plant is placed in an airtight, transparent container. The entire experiment is then weighed. For 10 days, the plant grows inside the container. After 10 days, the container is weighed again. The air inside the container is pumped out and carefully analyzed.
What is true about the air inside the container and the mass of the experiment?
-The air is richer in carbon dioxide. The mass of the experiment has not changed
-The air is richer in oxygen. The mass of the experiment has changed.
-The air is richer in carbon dioxide. The mass of the experiment has changed.
-The air is richer in oxygen. The mass of the experiment has not changed.
Answers
Answer:
hi
Explanation:
bye
How does the concentration of ions in a strong acid differ from a weak acid?
Answers
Answer:
A strong base has a much smaller concentration of positive ions (hydrogen ions) and a much greater concentration of negative ions (hydroxide ions). The weak base has a much greater concentration of positive ions (hydrogen ions) and a much smaller concentration of negative ions ( hydroxide ions) = answer !!
Explanation:
Explain how living
on the moon would be similar
to going camping.
Answers
Answer:
you will die because no air
Why does the atomic radius increase from top to bottom?
Answers
go to Russia and ask them. they know a lot about nukes
