Answers
When you fill a basin with liquid water, you can see that the water takes the shape of the container in which it is contained. This is because in the liquid state, water has molecules farther apart than in the solid state.
You can notice this property when performing an experiment with liquid and solid water.
When filling a glass, liquid water takes on the shape of a glass, and solid water, such as an ice cube, remains the same shape when placed in a glass.
Therefore, when filling a basin with water we perceive a property of the physicalstate of water, in liquid form. Water is one of the few substances that can be found naturally in liquid, solid and gaseous states.
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Answer:
Cautiously and avoiding filling in the central area so that it does not overflow when filling, since being very beach makes filling difficult.
Explanation:
The basins are shallow, that is why filling is difficult, the filling must be slow, low intensity and at the edges not placing the water filling in the center of the basin.
Related Questions
A student adds solid KCl to water in a flask. The flask is sealed with a stopper and thoroughly shaken until no more solid KCl dissolves. Some solid KCl is still visible in the flask. The solution in the flask is A) saturated and is at equilibrium with the solid KCl B) saturated and is not at equilibrium with the solid KCl C) unsaturated and is at equilibrium with the solid KCl D) unsaturated and is not at equilibrium with the solid KCl
By pipet, 11.00 mL of a 0.823 MM stock solution of potassium permanganate (KMnO4) was transferred to a 50.00-mL volumetric flask and diluted to the calibration mark. Determine the molarity of the resulting solution. A stock solution of potassium permanganate (KMnO4) was prepared by dissolving 13.0g KMnO4 with DI H2O in a 100.00-mL volumetric flask and diluting to the calibration mark. Determine the molarity of the solution Molarity= O.822 M
You wish to prepare 100 mL of a 0.100 M solution by dilution of a 1.00 M solution. Which of the following pieces of glassware will you use? A. 100 mL graduated cylinder B. 100 mL volumetric flask C. 10 mL volumetric pipet D. 25 mL volumetric pipet E. 10 mL graduated pipet F. 25 mL graduated pipet
The chemical formula for potassium bromide is KBr.A chemist determined by measurements that 0.0250 moles of potassium bromide participate in a chemical reaction. Calculate the mass of potassium bromide that participates.Round your answer to 3 significant digits.
Answers
Answer:
8.0 mol O₂
Explanation:
Let's consider the complete combustion reaction of C₉H₁₂.
C₉H₁₂ + 12 O₂ → 9 CO₂ + 6 H₂O
The molar ratio of C₉H₁₂ to O₂ is 1:12. The moles of O₂ required to react with 0.67 moles of C₉H₁₂ are:
0.67 mol C₉H₁₂ × (12 mol O₂/1 mol C₉H₁₂) = 8.0 mol O₂
8.0 moles of O₂ are required to completely react with 0.67 moles of C₉H₁₂.
Answer:
To react with 0.67 moles C9H12 we need 8.04 moles of O2
Explanation:
Step 1: Data given
Number of moles C9H12 = 0.67 moles
Step 2: The balanced equation
C9H12 + 12O2 → 9CO2 + 6H2O
Step 3: Calculate moles of O2 required
For 1 mol C9H12 we need 12 moles of O2 to produce 9 moles of CO2 and 6 moles of H2O
For 0.67 moles of C9H12 we need 12 *0.67 = 8.04 moles of O2
To produce 9*0.67 = 6.03 moles of CO2 and 6*0.67 = 4.02 moles H2O
To react with 0.67 moles C9H12 we need 8.04 moles of O2
Answers
Answer:
A solution that is 0.10 M HCN and 0.10 M LiCN
. A solution that is 0.10 M NH3 and 0.10 M NH4Cl
Explanation:
A buffer consists of a weak acid and its conjugate base counterpart. HCN is a weak acid and the salt LiCN contains its counterpart conjugate base which is the cyanide ion. A buffer maintains the pH by guarding against changes in acidity or alkalinity of the solution.
A solution of ammonium chloride and ammonia will also act as a basic buffer. A buffer may also contain a weak base and its conjugate acid.
Answer:
Good buffer systems are:
A) NH3 + NH4Cl
C) HCN + LiCN
D) HF + NaF
Explanation:
Buffers consist in a mixture of a weak acid with its salt or a weak alkaly with its salt. All buffer systems are conformed by:
1) Weak acid + salt
or
2) Weak alkaly + salt
It is very important these salts come from the weak acid or weak alkaly. It means, the anion of the acid must be the anion in the salt which is going to be part of the buffer system. On the other hand, the cation of the weak alkaly must be the cation of the salt which is going to form the salt in the buffer system.
Then, when we evaluate all options in this exercise, answers are the following:
A) 0.10 M NH3 and 0.10 M NH4Cl. It is a buffer because NH3 (ammonia) is a weak alkaly and NH4Cl is a salt coming from NH3.
Buffer component reactions:
Reaction weak alkaly: NH3 + H2O <-----> NH4+ + OH-
Reaction salt in water: NH4Cl ---> NH4+ + Cl-
NH4+ is the cation of the weak alkaly so it must be part of the salt in the buffer system. Then NH4Cl is a salt from NH3.
C) 0.10 M HCN and 0.10 M LiCN. It is a buffer because HCN is a weak acid and LiCN is a salt which is coming from HCN.
Buffer component reactions:
Reaction weak acid: HCN + H2O <-----> H3O+ + CN-
Reaction salt in water: LiCN --> Li+ + CN-
CN- is the anion of the acid, so it must be part of the salt in the buffer system. Then LiCN is a salt from HCN.
D) 0.10 M HF and 0.10 M NaF. It is a buffer because HF is a weak acid and NaF is a salt which is coming from HF.
Buffer component reactions:
Reaction weak acid: HF + H2O <------> H3O+ + F-
Reaction salt in water: NaF ---> Na+ + F-
F- is the anion of the weak acid (HF), so it must be part of the salt in th buffer systema. Then NaF is a salt coming from HF.
However option B, it is not a buffer, because it is a mixture of 0.10 M HCN and 0.10 M NaF. Salt is not coming from the weak acid.
Reaction weak acid: HCN + H2O <-----> H3O+ + CN- (anion of the acid is CN-)
Rection salt in water: NaF --> Na+ + F- (anion in the salt is F-, not CN-)
Anion of the acid is CN- and the anion in the salt is F- so it is not a salt coming from the weak acid. Then option B it is not a buffer system.
Answers
Explanation:
A compound is a substance that contains more than two different atoms in a fixed ratio by mass. Elements of a compound are chemically combined together.
A homogeneous mixture is defined as a mixture in which solute particles are uniformly distributed into the solvent.
Whereas a heterogeneous mixture is defined as a mixture in which solute particles are non-uniformly distributed in a solvent.
In both homogeneous and heterogeneous mixture there is no chemical combination between solute and solvent particles.
Therefore, each given substance is classified as follows.
(a) Orange juice : As it contains pulp of orange along with the liquid which are not present in uniform composition. Hence, orange juice is a heterogeneous mixture.
(b) vegetable soup : This soup also contains vegetable pieces and spices which are non-uniformly distributed. Hence, it is also a heterogeneous mixture.
(c) cement : It contains several different compound present in definite composition. Hence, cement is a homogeneous mixture.
(d) calcium sulfate : Its chemical formula is and in this compound both calcium and sulfate atoms are chemically combined together. Therefore, calcium sulfate is a compound.
(e) Tea : It is a homogeneous mixture as there is uniform composition of tea water in milk.
Answers
Due to property of conduction, conductor allows electrons and electric current to move easily,insulators prevent electric current from moving, electric current is the flow of an electrical charge in a circuit and electric circuit provides a path for electrons to flow.
What is conduction?
Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
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Answer:
1st box:4
2nd box:2
3rd box:3
4th box:1
Explanation:
I am not 100% sure on this, but i am pretty confident that this is the answer! BUT If this is somehow wrong, please tell me so i can comment a better answer! :)
Answers
Answer:
H20
Explanation:
peroxide would also eat bacteria along with the water
Final answer:
The primary intermolecular forces which act between a molecule of hydrogen peroxide (H2O2) and an iron(III) cation (Fe3+) are ion-dipole attractions. These arise due to the polar nature of the H2O2 molecule and the charged state of the Fe3+ ion.
Explanation:
The kind of intermolecular forces that act between a hydrogen peroxide molecule and an iron(III) cation chiefly involve ion-dipole attractions, which are a type of intermolecular force. This occurs due to the polar nature of the hydrogen peroxide molecule (H2O2) and the charged iron(III) ion (Fe3+).
The O-H bonds in the hydrogen peroxide molecule are polar as oxygen exhibits a higher electronegativity than hydrogen, meaning that it has a tendency to draw electrons closer to itself. This results in a dipole with partial negative charge residing at the oxygen end of the molecule, and a partial positive charge at the hydrogen end. Meanwhile, the iron(III) ion has a positive charge. This makes for a strong ion-dipole interaction between the two.
It's important to remember that intermolecular forces are the attractions between molecules which are crucial to their physical properties, while intramolecular forces are those that keep a single molecule intact. Further, although the term 'hydrogen bond' may suggest a bond between hydrogen and other atoms, it is, in fact, an intermolecular attraction force which is stronger than others like dipole-dipole attractions and dispersion forces.
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Answers
Answer:
B
Explanation:
The Agricultural Revolution gave Britain the most productive agriculture in Europe, with 19th-century yields as much as 80% higher than the Continental average. ... By the 19th century, marketing was nationwide and the vast majority of agricultural production was for the market rather than for the farmer and his family.
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