What is the physical state of each of these materials at room temperature
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Related Questions
The periodic table is based on an element's A. atomic mass. B. atomic number. C. molecular mass. D. molecular size.
2. If an eagle is flying at a constant speed, it is accelerating. True orFalse
Whh is most carbon compound poor conductor of electricity
In a coffee-cup calorimeter, 100.0 ml of 1.0 m naoh and 100.0 ml of 1.0 m hcl are mixed. both solutions were originally at 24.68c. after the reaction, the final temperature is 31.38c. assuming that all the solutions have a density of 1.0 g/cm3 and a specific heat capacity of 4.18 j/8c ? g, calculate the enthalpy change for the neutralization of hcl by naoh
B) coordinates
C) degrees
D) time zones
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Answer is: D) time zones.
Earth is divided into 24 timezones.
Most timezones are exactly one hour apart.
Timezone is a region on Earth bounded by lines of longitude.
Coordinated Universal Time (UTC) is the basis for modern civil time.
For example, UTC±00:00 is the Western European Time (Ireland, Portugal and UK).
UTC+01:00 is Central European Time, West Africa Time.
The earth is divided in 24 time zones. The correct option is D.
What is the earth divided into?
The earth is divided into 24 time zones. Each time zone represents a region where the same standard time is used. These time zones are approximately 15 degrees of longitude wide and are centered on the Prime Meridian (0 degrees longitude).
As the Earth rotates 360 degrees in 24 hours, each time zone covers roughly 1 hour of time difference from its neighboring zones. Time zones are crucial for coordinating activities and scheduling across different regions, ensuring global synchronization and smooth functioning in a world that spans multiple longitudes.
Read more about earth here: brainly.com/question/25624188
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Describe how the catalyst, zymase speeds up the reaction shown
The catalyst zymase speeds up the reaction by catalyzing the fermentation of sugar into ethanol and carbon dioxide. It is mostly present in yeasts.
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Answer:The atom with the largest radius and the most valence electrons.
Explanation:it just makes sense and it’s also right.
B) 8
C) 10
D) 12
26) Which pH indicates a basic solution?
A) 1
B) 5
C) 7
D) 12
27)
Given the following solutions:
Solution A: pH of 10
Solution B: pH of 7
Solution C: pH of 5
Which list has the solutions placed in order of increasing H+ concentration?
A)
A, B, C
B)
B, A, C
C)
C, A, B
D)
C, B, A
28) Which of the following pH values indicates the highest concentration of hydronium ions in a solution?
A) pH = 1
B) pH = 2
C) pH = 3
D) pH = 4
29) As HCl(g) is added to water, the pH of the water solution
A) decreases
B) increases
C) remains the same
30) What is the pH of a 0.0001 M aqueous solution of HCl?
A) 1
B) 2
C) 3
D) 4
31) What is the pH of a 0.001 M HNO3 solution?
A) 1
B) 2
C) 3
D) 11
32) The [H3O+] of a solution is 1 × 10–8. This solution has a pH of
A) 6, which is acidic
B) 8, which is basic
C) 6, which is basic
D) 8, which is acidic
33) The H3O+ ion concentration of a solution is 1 × 10–4 mole per liter. This solution is
A) acidic and has a pH of 4
B) acidic and has a pH of 10
C) basic and has a pH of 4
D) basic and has a pH of 10
34) The pH of 0.001M HCl is
A) 1
B) 2
C) 3
D) 4
35)
Phenolphthalein is pink in an aqueous solution having a pH of
A)
5
B)
2
C)
7
D)
12
36)
What is the color of the indicator thymol blue in a solution that has a pH of 11?
A)
red
B)
blue
C)
pink
D)
yellow
37) Three samples of the same solution are tested, each with a different indicator. All three indicators, bromthymol blue, bromcresol green and thymol blue, appear blue if the pH of the solution is
A) 4.7
B) 6.0
C) 7.8
D) 9.9
38) Based on the results of testing colorless solutions with indicators, which solution is most acidic?
A) a solution in which bromthymol blue is blue
B) a solution in which bromcresol green is blue
C) a solution in which phenolphthalein is pink
D) a solution in which methyl orange is red
39)
Which indicator would best distinguish between a solution with a pH of 3.5 and a solution with a pH of 5.5
A)
bromthymol blue
B)
bromcresol green
C)
litmus
D)
thymol blue
40) Which indicator is blue in a solution that has a pH of 5.6?
A) bromcresol green
B) bromthymol blue
C) methyl orange
D) thymol blue
41) Which indicator, when added to a solution, changes color from yellow to blue as the pH of the solution is changed from 5.5 to 8.0?
A) bromcresol green
B) bromthymol blue
C) litmus
D) methyl orange
42)
The table below shows the color of the indicators methyl orange and litmus in two samples of the same solution.
Which pH value is consistent with the indicator results?
A)
1
B)
5
C)
3
D)
10
43) In which 0.01 M solution is phenolphthalein pink?
A) CH3OH(aq)
B) Ca(OH)2(aq)
C) CH3COOH(aq)
D) HNO3(aq)
44) Which indicator is yellow in a solution with a pH of 9.8?
A) methyl orange
B) bromthymol blue
C) bromcresol green
D) thymol blue
45) In which solution will thymol blue indicator appear blue?
A) 0.1 M CH3COOH
B) 0.1 M KOH
C) 0.1 M HCl
D) 0.1 M H2SO4
46) According to Reference Table M, what is the color of the indicator methyl orange in a solution that has a pH of 2?
A) blue
B) yellow
C) orange
D) red
47) Which solution when mixed with a drop of bromthymol blue will cause the indicator to change from blue to yellow?
A) 0.1 M HCl
B) 0.1 M NH3
C) 0.1 M CH3OH
D) 0.1 M NaOH
48)
According to one acid-base theory, NH3 acts as a base when an NH3 molecule
A)
accepts an ion
B)
donates an ion
C)
accepts an ion
D)
donates an ion
49)
Given the diagram representing a reaction:
According to one acid-base theory, the water acts as
A)
a base because it accepts an H+
B)
a base because it donates an H+
C)
an acid because it accepts an H+
D)
an acid because it donates an H+
50)
Given the balanced equation representing a reaction:
According to one acid-base theory, the H2O() molecules act as
A)
a base because they accept H+ ions
B)
a base because they donate H+ ions
C)
an acid because they accept H+ ions
D)
an acid because they donate H+ ions
Answers
<------------- ----------->
St. Weak Weak St
Acid. Base
7 = neutral
5 Acid. 8 10 12
Bases
Everything lt of 7 Acid
Everything rt of 7Base
The further left of 7 Stronger Acid
The further right of 7
Stronger Base
(2) The gas particles have no attractive forces between them.
(3) The gas particles are larger than the distances separating them.
(4) As the gas particles collide, the total energy of the system decreases.
Answers
Ans: (2) The gas particles have no attractive forces between them.
The kinetic theory explains the behaviour of a hypothetical ideal gas. It explains pressure in terms of the collision of gas particles against the walls of the container which it occupies.
The kinetic theory of gases is based on three main postulates:
1) The collision between gas particles is elastic i.e. no energy is lost or gained
2) The gas particles are treated as point masses i.e. the volume occupied by the gas particles is negligible when compared to the volume of the container
3) There are no attractive or repulsive forces between particles.
The statement that describes the particles of an ideal gas, based on the kinetic molecular theory is .
Further Explanation:
Kinetic theory of gases depicts gas as a large number of particles that are in continuous random motion. It explains the macroscopic properties of gases by taking into account their molecular composition and motion.
Postulates of kinetic theory of gases:
i) The gas molecules are very small and are located far apart from each other. Most of the volume occupied by the gas is an empty space.
ii). The molecules of the gas are in rapid random motion. These can move in all directions.
iii). The gas molecules undergo collisions with each other and with the walls of the container. The collisions between molecules and container walls are responsible for the pressure of the gas.
iv). There is no loss of kinetic energy when gas molecules collide so their collisions are known as perfectly elastic.
v). No interaction occurs between different molecules of gas during collisions.
(1) The motion of the gas particles is orderly and circular.
The molecules of a gas move randomly in all directions so their motion is not orderly and circular.
(2) The gas particles have no attractive forces between them.
The molecules of a gas move randomly in all directions so their motion is not orderly and circular.
(3) The gas particles are larger than the distances separating them.
The particles of gas are very small and are situated far away from each other. So the distance between the particles is larger than their size and not vice-versa.
(4) As the gas particles collide, the total energy of the system decreases.
The collisions of gas molecules are considered to be perfectly elastic. So the total energy of the system remains constant. It neither increases nor decreases.
Therefore option (2) describes the particles of an ideal gas on the basis of the kinetic molecular theory.
Learn more:
- What is the kinetic energy of electrons? brainly.com/question/5031462
- Which statement is true for Boyle’s law: brainly.com/question/1158880
Answer details:
Grade: High School
Subject: Chemistry
Chapter: Ideal gas equation
Keywords: collisions, gas, random motion, kinetic energy, perfectly elastic, interaction, container, kinetic theory of gases, volume, motion, orderly, circular, decreases.