Answer:
K₂0
Explanation:
which of the following are physical properties of nonmentals
You did not provide any options.
Figure 5 shows how the temperature of a substance changed as it was heated. Which segment of the graph indicates that the substance was undergoing a change of state?
answer:
B
Why:
Because when heated up, the particles vibrate from the heat and keep on vibrating.
at point b of the diagram, the energy is gone to breaking bonds of the (let's assume) solid.
So there is no change in temperature.
I hope this helps please let me know if you need me to explain more.
When temperature is changing with respect to the time in the given graph, then substance B was undergoing a change of state.
What is change of state?When any substance converts from one form of matter to the other form, then this phenomenon is known as change of state.
In the given figure a graph represents the change in temperature of substances A, B, C and D with respect to the time. Temperature of the substances A, C & D keep continuous changing with respect to the time. But substance B shows change in state because it absorbs the heat to convert in another state by breaking old bonds and making new bonds and showing showing no change in temperature.
Hence, substance B was undergoing a change of state.
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in space why is it black in space except the planets
Answer:
because space is near-perfect vacuum - meaning it has exceedingly few particles- there is virtually nothing in the space between stars and planets to scatter light to our eyes
HELPPPPPPPPPPPPPPPPPPPPPPPP
What is the difference between a producer and a consumer? (Select all that apply.)
Consumers can make their own food energy and producers cannot.
Producers convert sunlight energy into fuel and consumers cannot.
Consumers convert sunlight energy into fuel and producers cannot.
Producers can make their own food energy and consumers cannot.
Answer:
producers convery sunlight energy into fuel and consumers cannot
producers can make their own food energy and consumers cannot
give the symbol and the nuclei number of an isotope that is used as a nuclear fuel
Answer: The nuclear symbol of an isotope indicates the number of protons and neutrons in an atom of the element. It does not indicate the number of electrons. The number of neutrons is not stated. Instead, you have to figure it out based on the number of protons or atomic number.
Explanation:
brain me
A-10
A-6
Group mL A-8 mL mL A-2mL
1 10.6 8 6.2 2.1
2
9
9 7
N
3
11
9
7
3
4
10.4
8.4
6.2
2.1
5
10.39
8.39
6.3
2.3
6
11
9
7
3
Answer: good
Explanation:
tyuk
What are compounds????????????????
Answer:
Compounds are pure substance consisting of two or more different atoms
Answer:
I hope this help
Explanation:
pls brainliest
What do the arrows in the photograph represent?
0 A. An action-reaction force pair
B. Noncontact
forces
C. Balanced forces
D. Friction and air resistance
Answer:
C. Balanced forces
Explanation:
What do the arrows in the photograph represent Balanced forces
Graphite conducts heat in a similar way to metals because it contains __________ __________. What two words complete the sentence?
Answer:
Free electrons
Explanation:
Graphite conducts heat in a similar way to metals because it contains free electrons.
Conductivity is arised from the delocalization of free electrons. Metals are electron rich and conduct thermally and electrically. Graphite conducts heat in a similar way because it contain delocalized electrons.
What is graphite?Graphite is an allotrope of carbon as diamond and fullerenes. Graphite exhibits a layered helical structures in which the carbon atoms are arranged in a hexagonal fashion.
Substances conduct electricity and heat when they are rich in electrons and are mobile to pass through it. Metals are electropositive and they contains extra electrons which can be delocalized between orbitals or energy levels.
This delocalization of electrons results in an a thermal or electrical current in the substance. Carbon is in sp2 hybridisation in graphite. Where, the electrons can transit from one layer to the other in the layered structure.
Therefore, the presence of delocalized electrons make graphite conducting.
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ANSWER ASAP!!!! WILL GIVE BRAINLIEST IF RIGHT
Please help. 100 points
Carbon-12, Carbon-13, Carbon-14
1. The numbers 12, 13, and 14 refer to what
2. What subatomic particle makes each of these isotopes different?
3. What subatomic particle makes each of these isotopes the same?
What is acid rainnnnnn
Answer:
ACID RAIN
Explanation:
duh
2) What organization led the fight to stop this practice?
Answer:
abolitionist movement
Explanation:
Which of the following shows the combustion of a hydrocarbon?
Answer:
c
Explanation:
A hydrocarbon consists of only carbon and hydrogen atoms. Combustion occurs when a hydrocarbon reacts with oxygen to form carbon dioxide and water molecules.
A student draws a model of one of the sun's layers. The student draws arrows to represent hot gas moving away from the center of the sun and other arrows to represent cool gas moving toward the center of the sun. Which layer does the model show?
Radiation Zone
Convection Zone
Chromosphere
Inner Core
Answer:
The convection zone :)
What is a solvent? please answer
A. The material that is dissolved
B. The material that increases the speed of the dissolution
C. The material that reduces how much can be dissolved
D. The material that is dissolving another material
WILL MARK BRAINLIEST
Answer:
D
Explanation:
Solvent is the material that is dissolving another material. Thus, option D is correct.
A solvent is a substance that dissolves another substance to form a solution. The substance that is being dissolved is called the solute, and the substance that is doing the dissolving is called the solvent. The solute is usually present in a smaller amount than the solvent, and it is the solvent that determines the physical properties of the solution, such as its density, viscosity, and boiling point.
For example, when salt is dissolved in water, the salt is the solute and the water is the solvent. The water molecules surround the salt molecules and break them apart, so that the salt ions are free to move around in the solution. The solution is then a homogeneous mixture of salt ions and water molecules.
Thus, option D is correct.
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Se preparan 800g de una disolución, para ello se disuelve 5g de un soluto, determinar la composicion de la solucion en %m/m
Answer
800g
Explanation:
please help me I need it now
Answer:
Ok for the question you can make up your own
If you can't make up your own tell me so I can try my best to come up with questions
1. Answer: Since and last are adverbs so am not sure how that part going to go
Type of Adverb for since is: Time
Type of Adverb for last is : Time
2. Question:
Answer: happily
Type: Manner
Hopes this helps you.
a student is given a mixture of sand and salt. describe a method the student could use to separate the mixture.
There is a golden role of solubility, polar solute dissolve in polar solvent and non polar solute dissolve in non polar solvent. Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
What is solution?Solutions are a homogeneous mixture of two or more substances. A solution is a homogeneous mixture of solvent and solute molecules. Solvent is a substance that is in large amount in solution.
Solute is the substance which is in small amount in a solution. Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
Therefore, Salt and sand can be separated by dissolving the salt in water, filtering the mixture, and then evaporating the water to recover the salt.
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mg(s) + 2hcl(aq) mgcl2(aq) + h2(g)
Please give me a real answer please!
In this reaction Mg(s) + 2 HCl(aq) → MgCl2(aq) + H2(g) Magnesium acts as a reducing agent.
Only question should be of 4 or answer of other questions should also be there.
Help on this question please
Answer:
the Answer is
Explanation:
30 m east..
Answer: 30m/s east.
Explanation:
Velocity must have both a magnitude(speed) and direction.
What chemicals makes up H2O?
Answer:
2 Hydrogen Atoms and 1 Oxygen Atom
Explanation:
Answer:
hydrogen and oxygen
Explanation:
Is the milky way a constellation
Answer:
No, it's a galaxy
Explanation:
Explain why the structure of Copper [ 1s², 2s², 2p⁶, 3s², 3p⁶, 3d¹⁰,4s¹] is more stable than [ 1s², 2s², 2p⁶, 3s, 3p²⁶, 3d⁹,4s² ].
A subshell which is 100% full or 50% full is more stable than subshells which are partially filled with a number of electrons less than or greater than half the number of electrons which can be held by the subshell.
Explanation:
Do all particles pass right through the atoms undeflected?
Answer:
no when Rutherford performed the gold foil experiment he bombard the atom alpha particles and two other scientist, Geiger and Marsden came with great news saying the particles suffered serious deflection
this is because the blank attractive forces between the ions result in a very blank structure
Answer:
This is because the large attractive forces between the ions result in a very stable structure.
Please help, just help me please
35. Elemental phosphorus burns in oxygen with an intense flame, producing a brilliant light and clouds of the oxide product. These properties of the combustion of phosphor led to its being used in bombs and incendiary de warfare. P4(s) + 502(8) --> 2P205(s) If 4.95 g of phosphorus is burned, what mass of sy it combine with?
I'm gonna assume you want to find how much mass of oxygen 4.95g of phosphorus reacts with
Answer:
P4(s) + 502(8) --> 2P205(s)
We know that Phosphorus is polyatomic and Oxygen Gas is diatomic
Atomic mass of Phosphorus= 30.97g/mol
Atomic mass for Oxygen = 16g
4 * 30.97 = 123.88g
2 * 16 = 32g
Since there are 5 moles of oxygen: 5 * 32 = 160g
Ok, so 160g of oxygen will react 123.88g of Phosphorus
4.95g phosphorus burns with how much oxygen?
4.95 * 160g
123.88g
= 6.4g of Oxygen
An isotope of nitrogen experiences the weak force which transforms one of its
protons to a neutron. How would this change the atom?
Select one:
O a. It would have no effect because nitrogen still has the same mass
number.
O b. It would transform the nitrogen atom to a carbon atom.
It would make the atom transform it into a heavier isotope of nitrogen.
O d. It would transform nitrogen to an oxygen atom.
Check
Answer:
It would transform the nitrogen atom to a carbon atom
Explanation:
11) When sodium metal is subjected to violet light, it causes the photoelectric effect. However, red light does not affect
the sodium. Explain this phenomena.
The phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
The phenomenon in which a substance emits electrons when light is incident upon it is called the photoelectric effect.
This electron would not be emitted if the frequency of the light does not exceed a minimum frequency called the threshold frequency.
Since in the case of the sodium metal, violet light causes the photoelectric effect while red light does not.
This implies that red light does not exceed the minimum frequency for the photoelectric effect to occur, but violet light does thereby causing the photoelectric effect to occur.
So, the phenomena in which violet light causes photoelectric effect and red light does not is because red light does not achieve the minimum frequency for the phenomenon to occur but violet light does.
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what is chemical reaction? Name four conditions required for chemical reaction with an examples of each.
Answer:
two reactants are critical requirement essental for reation. whereas precipitate is defined is an insoluble material produced when two aqueous solutions react with each other chemically.
Answer: a process that involves rearrangement of the molecular or ionic structure of a substance, as opposed to a change in physical form or a nuclear reaction.
Explanation: hope this helps
