Answer:
2NaOH+ H2SO4 → Na2SO4 + 2H2O
I HOPE ITS RIGHT IF NOT THEN SORRYHAVE A GREAT DAY :)
Answer:
Sodium+sulphate=Na2SO4
Acidsodium sulphate + hydrogen=Na2SO4+H2O
1. what is hard water.
2. Mention four sources of water.
3. write down the chemical formula of water.
4. What is purification of water.
5. Mention two importance of purification of water.
6. Mention 4 method used ot purify water. 7. Mention 4 impurities found in water.
8. Explain the term contaminated of water.
9. State two physical properties of water. 10. mention the names of of the elements that causes hardness in water.
Explanation:
Hard water is a type of water that can not easily lather with soap. Springs, wells, pipe-borneH20. The 2 is in basePurification of water is the cleansing of water to avoid diseases, germs, bacteria. To prevent diseases, to make the water safe for drinkingBoiling,chlorination, distillationSorry about number seven! This is when water is unsafe or dirty, it cannot be used for the purpose for which it is intended Water is tasteless, water is colourlessCalcium tetraoxosulphate(vi), Magnesium tetraoxo sulphate (vi) and Calcium hydrogen trioxocarbonateMention the four characterstics of warm blooded animals.
Answer:
The four characrteristics of warm blooded animals are÷
Explanation:
i=They can keep its body temperature the same no matter what the outside temperature .
ii=They can maintain a constant body temperature.
iii=They obtain energy from food consumption.
iv=They maintain their body temperature higher than environment.
Answer:
i) Their body temperature remain constant in any climate.
ii) They obtain energy from food consumption
I only know this much:)
can you answer with working out
why water can reduce unpleasant smell that produce from methane gas ?
Answer:Water contains Oxygen the purified the methane gas
Explanation:
A mixture of three gases A, B, and C have a total pressure of 8.15 atm. The partial pressure of gas A is 2.70 atm. The partial pressure of B is 2.09 atm. What is the partial pressure of gas C?
a
2.45 atm
b
5.67 atm
c
1.35 atm
d
3.36 atm
Answer:
for this question i think the answer is 1.35 atm
Define force and speed
Force = The external energy that changes or tends to change the state of any body or object is called force.
Speed = The rate of distance is called speed.
Answer:
Force is a push or pull which changes or tend to change the position of a body.
The rate of change its position with time or magnitude is called speed.
Can you help me on this. I will support your correct answer
Patience, a popular card game in Mendeleev's time, is also known as Go Fish.
A. True
B. False
Answer:
B. False
Explanation:
step by step explanation
Answer:
False
Explanation:
por que existen diferencias en el consumo del agua de las personas?
Las diferencias entre el consumo de agua existen debido a que varios factores externos inciden en este proceso de ingesta de agua.
El agua es un compuesto químico que es vital para la vida de los seres vivos. En el caso de los humanos es necesario tomar agua para evitar la deshidratación y activar muchos procesos naturales del cuerpo.
La cantidad de agua que debe tomar un humano depende de varios factores como:
La temperatura del lugar en el que esté, si está en un lugar con mayor temperatura la sudoración hará que requiera más agua.La cantidad de actividad física que realiza, entre más actividad física se eliminan más líquidos corporales por medio del sudor.La salud, cuando tiene alguna enfermedad como diarrea o vómito puede perder líquido más rápidamente.Embarazo y lactancia, las mujeres en estado de embarazo y lactancia deben tomar más agua dado que un porcentaje del agua de su cuerpo se va para el consumo de su hijo.Incluso la cantidad de agua de agua puede variar dependiendo del peso de cada persona, aquellas personas que pesan más deben beber más agua, que aquellas que tienen menor peso debido a que la cantidad de agua debe ser proporcional a su peso.
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The graph below shows how solubility changes with temperature.
A graph with the horizontal axis showing temperature ranging from 0 to 10 in units of 10 and the vertical axis solubility in grams of salt per 100 grams of water. Several compounds are shown. All data are approximate. The substances and their coordinates are as follows: upper N a upper C l: 0, 38; 10, 38; 20, 38; 30, 38; 40, 39; 50, 39; 60, 39; 70, 40; 80, 40; 90, 40; 100, 40. Upper N a subscript 2 upper H upper A s upper O subscript 4: 0, 5; 10, 18; 20, 28; 30, 39; 40, 49; 60, 65; 80, 82. Upper B a (upper N upper O subscript 3) subscript 2: 0, 5; 10, 8; 30, 12; 40, 15; 50, 18; 60, 20; 80, 28; 100, 33. Upper N a subscript 2 upper S upper O subscript 4: 0, 5; 5, 8; 10, 10; 15, 15; 20, 20; 25, 20; 28, 35; 30, 40; 32, 49; 33, 50; 35, 50; 40, 48; 50, 47; 60, 46; 70, 45; 80, 43; 90, 32; 100, 40. Upper C 3 subscript 2 (upper S upper O subscript 4) subscript 3 dot 9 upper H subscript 2 upper O: 0, 18; 20, 10; 30, 8; 50, 5; 60, 3; 80, 1; 100, 0.
How many grams of NaCl will be needed to form 600 mL of a saturated solution at 100°C?
15 g
24 g
40 g
240 g
answer 240g
The amount of NaCl required to prepare a 600 mL saturated solution depends on the solubility at the temperature.
What is solubility?Solubility is the amount of solute that dissolves in a given volume of solvent.
Solubility = amount of solute/volume of solvent oSolutions may be saturated, unsaturated, super saturated solution.
For solutes, the solubility increases with increase in temperature.
The amount of NaCl required to prepare a 600 mL saturated solution depends on the solubility at the temperature.
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Answer:
240
Explanation:
A machine uses filtration to separate a component from orange juice. Which component does the machine most likely separate from the mixture?(1 point)
water
water
pulp
pulp
sugar
sugar
pigment
Which method of separation would be most appropriate for separating a mixture of water and alcohol?(1 point)
chromatography
chromatography
distillation
distillation
filtration
filtration
evaporation
Which method separates components of a mixture according to how quickly the particles travel through a medium?(1 point)
chromatography
chromatography
filtration
filtration
evaporation
evaporation
distillation
The boiling point of water is 100ºC. The boiling point of acetone is 56ºC. Which statement about distilling a mixture of acetone and water is correct?(1 point)
Acetone remains in the original container.
Acetone remains in the original container.
Acetone is captured and cooled.
Acetone is captured and cooled.
Water is collected as it leaves the mixture.
Water is collected as it leaves the mixture.
Water will vaporize from the mixture before acetone.
Substance A and substance B are mixed together. To separate the mixture, water is added, and substance A is filtered out. Then, the remaining liquid is heated to remove the water, leaving a residue of substance B. Which statement about substance A and substance B could be correct?(1 point)
Substance A is rice, and substance B is sugar.
Substance A is rice, and substance B is sugar.
Substance A is sand, and substance B is alcohol.
Substance A is sand, and substance B is alcohol.
Substance A is alcohol, and substance B is salt.
Substance A is alcohol, and substance B is salt.
Substance A is sugar, and substance B is instant coffee.
Pulp
distillation
chromatography
Acetone is captured and cooled.
Substance A is rice, and substance B is sugar.
To separate the components of a mixture the substances to be separated must differ in a given physical property.
In chemistry, there are diverse separation techniques used to separate the components of a mixture. Separation depends on differences in a given physical property such as boiling point, solubility in a solvent, difference in particle size etc.
Filtration can be used to separate a solid from a liquid hence it can be used to separate pulp from orange juice.
To separate water and alcohol, distillation is used because such a separation depends on the difference in the boiling points of water and alcohol. Water boils at a higher temperature than alcohol hence the mixture can be separated by distillation.
Chromatography is a method of separation that is dependent on how quickly a the components of a mixture move through a stationary phase.
Acetone has a lower boiling point than water hence it collected first and cooled before water.
Clearly, substance A must be a solid since it is filtered out after adding water. Substance B must be a water soluble substance which can be recovered from water by evaporation to dryness. Hence substance A is rice, and substance B is sugar.
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All three states of matter can be ____________ or a solvent in a solution.
What is cell wall? Where is it found?
Answer:
A cell wall is a fairly rigid layer surrounding a cell located outside of the plasma membrane that provides additional support and protection. They are found in bacteria, archaea, fungi, plants, and algae. Animals and most other protists have cell membranes without surrounding cell walls.
Explanation:
Which option describes the structure of the electron shells in a neutral carbon atom? (1 point)
O The inner shell is complete with four electrons. The outer shell is incomplete with two electrons.
O The inner shell is incomplete with three electrons. The outer shell is incomplete with three electrons.
O The inner shell is complete with three electrons. The outer shell is incomplete with three electrons.
O The inner shell is complete with two electrons. The outer shell is incomplete with four electrons.
Answer:
The inner shell is complete with two electrons. The outer shell is incomplete with four electrons.
Explanation:
There can only be 2 electrons on the first (inner) shell, so it would be complete with two and there needs to be 8 electrons on the outer shell for it to be complete, so it would be incomplete with 4.
Hope this helps :)
Answer:
(Question 1) Metallic bonds are responsible for many properties of metals, such as conductivity. Why is this possible?
(Answer) The bonds can shift because valence electrons are held loosely and move freely.
(Question 2) Between which types of elements do ionic bonds occur, and how do electrons act within the bond?
(Answer) metals and nonmetals, electrons transferred
(Question 3) Which kind of bond would occur between sodium (Na, Group IA) and chlorine (Cl, Group VIIA)?
(Answer) ionic
(Question 4) Why is carbon said to provide a “backbone” in many molecules?
(Answer) Carbon atoms can form chains and branches with each other, and other atoms can attach to these.
(Question 5) Which option describes the structure of the electron shells in a neutral carbon atom?
(Answer) The inner shell is complete with two electrons. The outer shell is incomplete with four electrons.
Explanation:
i just finished the quick check. enjoy <3
Give the relation of energy (E) and frequency (v) as given by Planck. Calculate the frequency and energy of a photon of radiation having wavelength 3000°A.
Pls answer correctly,need it urgently...
Solution:-1
[tex]\\ \sf\longmapsto E=hv[/tex]
E denotes to Energy h denotes to planks constantv denotes to frequency.Solution:-2
Wavelength=3000Å[tex]\boxed{\sf \lambda=\dfrac{c}{v}}[/tex]
[tex]\\ \sf\longmapsto v=\dfrac{c}{\lambda}[/tex]
[tex]\\ \sf\longmapsto v=\dfrac{3\times 10^8m/s}{3000\times 10^{-10}m}[/tex]
[tex]\\ \sf\longmapsto v=0.001\times 10^{18}s^{-1}[/tex]
[tex]\\ \sf\longmapsto v=1.0\times 10^{15}s^{-1}[/tex]
Now
[tex]\\ \sf\longmapsto E=hv[/tex]
[tex]\\ \sf\longmapsto E=6.626\times 10^{-34}Js\times 1.0\times 10^{15}s^{-1}[/tex]
[tex]\\ \sf\longmapsto E=6.6\times 10^{-19}J[/tex]
What is the balanced form of the chemical equation shown below?
Cr(s) + Cl2(g) → CrCl3(s)
The balanced equation for the chemical equation given in the question above is: 2Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)
How do i balance equation?The following data were obtained from the question:
Cr(s) + Cl₂(aq) → CrCl₃(s)Balanced equation =?Chemical equations are generally balanced by ensuring that the number of atoms of each element present on both sides of the equation are equal.
Now, we shall balance the equation given from the question as follow:
Cr(s) + Cl₂(aq) → CrCl₃(s)
There are 2 atoms of Cl on the left side and 3 atoms on the right side. It can be balanced by writing 2 before CrCl₃ and 3 before Cl₂ as shown below:
Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)
There are 2 atoms of Cr on the right side and 1 atom on the left side. It can be balanced by writing 2 before Cr as shown below:
2Cr(s) + 3Cl₂(aq) → 2CrCl₃(s)
Thus, the equation is balanced.
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please answer correctly.
Answer: i dont know but yu got it
Explanation:
Identify each of the highlighted materials as an element, a compound, or a mixture, and explain your reasoning.
Answer:
These are compounds.
Explanation:
As it is formed by chemically bonding of two elements C ( carbon) and H (hydrogen) .
Its not a mixture because mixture is Just dispersed of diferrent elements or a compound which are not in fix ratioAnswer:
Butane and benzene are both compounds. They contain multiple elements bonded together in a specific ratio. Kerosene and gasoline are mixtures because they are combinations of several compounds. Oxygen is an element because it is made up of only one type of atom.
Explanation:
cho 6,5 g Zn tác dụng với dung dịch chứa 12g HCl. Thể tích khí H2 ( ở đktc ) là
Answer: nHCl = 12/36,5= 0,38(mol)
nZn = 6,5/65 = 0,1(mol)
Ta có pt: Zn + 2HCl --> ZnCl2 + H2
Vì 2n Zn = 0,2 < n HCl = 0,38 nên HCl dư
Theo PTHH :
n H2 = n Zn = 0,1(mol)
V H2 = 0,1.22,4 = 2,24(lít)
Explanation:
URGENT PLEASE HELP 25 POINTS!!!
A generator produces 5 megawatts (MW) of power. How many watts (W) are produced?
Explanation:
it would have been easier and faster to just look it up on the internet.
this is like in the computer world too (for storage and memory sizes) .
we typically use "kilo", "mega", "giga", "tera", ... to express large quantities.
kilo means 1000
mega means million (1000000)
giga means billion (1000000000)
and so on
so, 5 MW are 5 million Watts. or 5000000 Watts.
4
D:
According to the phase diagram for H20, what happens to the phases of
water at 1 atm pressure as the temperature is increased from-10-C to 1102
Water
liquid
Pressure (atm)
0.5
025-
Ice
(solid)
Water vapor
(gas)
0
Temperature (°C)
O A. Water changes from a liquid to a gas to a solid
O B. Water changes from a gas to a liquid to a solid.
O C. Water changes from a solid to a liquid to a gas.
O D. Water changes from a solid to a gas to a liquid
Answer:
D
Explanation:
water changes
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According to the phase diagram for H[tex]_2[/tex]O, Water changes from a solid to a gas to a liquid at at 1 atm pressure as the temperature is increased from-10°C to 110°C. Thus, the correct option is option D.
A phase diagram is a type of graph used to display the conditions during which thermochemical distinct phases occur as well as coexist at equilibrium in physical chemistry, technology, mineralogy, as well as materials science.
Phase changes take place along equilibration lines. According to the phase diagram for H[tex]_2[/tex]O, Water changes from a solid to a gas to a liquid at at 1 atm pressure as the temperature is increased from-10°C to 110°C.
Therefore, the correct option is option D.
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Assertion (A): An orbital cannot have more than two electrons, moreover, if an orbital has two electrons they must have opposite spins.
Reason (R): No two electrons in an atom can have the same set of all the four quantum
numbers.
a) Both A and R are true and R is the correct explanation of A.
b) Both A and R are true but R is not the correct explanation of A.
c) A is true but R is false.
d) Both A and R are false.
pls answer
Answer:
the correct answer is option ( A )
Both A and R are true and R is the correct explanation of A.
Explanation:
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A sample of gas has a volume of 20 cm³.The pressure is changed to 90 kPa at constant temperature,while the volume increases to 75 cm³.What was the original pressure of the gas?
Answer:
337.5kPa ~ 338kPa
Explanation:
Using the ideal gas law PV=nRT we have the following definitions from the problem:
V(initial) = 20cm³
P(initial) = ?kPa
V(final) = 75cm³
P(final) = 90kPa
Since we know that the number of moles of the sample did not change, nor did the temperature, nor does the ideal gas constant (R) we can rewrite this equation to state:
P(initial)V(initial) = nRT =P(final)V(final) ~ P(initial)V(initial) = P(final)V(final)
Rearranging this equation as we are solving for the initial pressure we find that:
P(initial) = (P(final)V(final))/V(initial)
P(initial) = ((90kPa)(75cm³))/20cm³
P(initial) = 337.5kPa ~ 338kPA
2 Write the molecular formula of the compounds given below: Sodium hydrogen carbonate b) calcium hydroxide ) silver nitrate d) ammonium sulphate ) Magnesium carbonate f) Ferric oxidea
[tex]\\ \rm\Rrightarrow Sodium\:Hydrogen\:carbonate=NaHCO_3[/tex]
[tex]\\ \rm\Rrightarrow Calcium\:Hydroxide=Ca(OH)_2[/tex]
[tex]\\ \rm\Rrightarrow Silver\:Nitrate=Ag(NO_3)_2[/tex]
[tex]\\ \rm\Rrightarrow Ammonium\:Sulphate=(NH_4)_2SO_4[/tex]
[tex]\\ \rm\Rrightarrow Ferric\:oxide=Fe_2O_3[/tex]
Which of the following describes a limiting reactant? Question 10 options: A) The reactant that runs out last and limits how much product can be made B) The reactant that is present at the smallest mass C) The reactant that runs out first and limits how much product can be made D) An inert element
Answer:
The correct choice is option C) The reactant that runs out first and limits how much product can be made
Explanation:
The limiting reactant is a reactant in a chemical reaction that gets consumed first and thus limits how much product can be formed.
Answer:
The reactant that runs out first and limits how much product can be made
Explanation:
two drops of mercury on a flat surface are rolled towards each other. When they make contact with each other they fuse to form one drop.Why?
Answer:1) It is due to large cohesive force acting between the molecules of mercury that the droplets of mercury when brought in contact pulled together to form a bigger drop in order to make potential energy minimum. The temperature of this bigger drop increases since the total surface area decreases.
2) A spherical shape has the minimum surface area to volume ratio of all geometric forms. When two drops of a liquid are brought in contact, the cohesive forces between their molecules coalesce the drops into a single larger drop. This is because, the volume of the liquid remaining the same, the surface area of the resulting single drop is less than the combined surface area of the smaller drops. The resulting decrease in surface energy is released into the environment as heat.
Which of the following is an example of the geosphere interacting with the atmosphere?Streams become muddy due to erosion.
Volcanic eruptions release gases into the air.
Rocks crack open when water in the cracks freeze.
Plants absorb carbon dioxide and produce oxygen.
Answer:
Volcanic eruptions release gases into the air.
Explanation:
This is because the atmosphere collects the gas from the volcano, the volcano is apart of the geosphere because it is a part of the earth's surfaces.
which one is it…need help ASAP!!!
Hỗn hợp E gồm hai este đơn chức X và Y (MX< MY). Thủy phân hoàn toàn 0,11 mol E cần vừa đủ
120 ml dung dịch NaOH 1M, chưng cất dung dịch sau phản ứng, thu được ancol propylic và 8,78 gam hỗn
hợp Z gồm ba muối. Phần trăm khối lượng của Y trong E là
Answer:
write in English bro? can you?
Explanation:
I can't understand your language sorry .
Name the functional group in the following molecule:
CH3CH2NH2
A. amine
B. amide
C. ether
D. thiol
Answer:
(A) Amine
Explanation:
Ch3Ch2Nh2 is an Amine.
An amine is often a functional group with a lone pair on the nitrogen atom. Amines structurally mimic ammonia, where nitrogen can link with up to three hydrogen atoms. Here the correct option is A.
Amines are organic substances that have a lone pair of nitrogen atoms in them. In essence, they are produced by replacing one or more hydrogen atoms in ammonia (NH₃) with an alkyl or aryl group, giving them the names alkylamines and arylamines, respectively.
In addition to medicines and treatments, amines are used to create nylon and azodyes. They are frequently employed in the creation of compounds for the filtration of water, and medicinal, and crop protection.
Thus the correct option is A.
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