To identify the gas produced in a chemical reaction without observing the atoms and molecules directly through the characteristics of the gas.
Chemical reaction is defined as the process by which substances (known as reactants) combine together with the formation of bonds to form products.
There are some signs that shows that chemical reaction has occurred. They include:
Color Change Change of temperatureGiving off gas (Evolution of gas)Therefore, the production of gas from a chemical reaction shows that a reaction has occurred.
These gases can be identified without observing the molecules through that characteristics of the gas. This include:
the smell of the gas: For example when a gas is given off, and it smells like urine, it's likely to be ammonia gas. color change that occurs during the chemical reaction can show the type of gas that was given off. For example when lime water turns into milky color, it shows the presence of carbondioxide gas.Learn more here:
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HELP!! fill in the blank using the word bank please (picture attached).
_________ is when humans choose the traits of an organism.
Your answer should be -selective breeding
[tex]hope that helps[/tex]
A spoonful of table salt dissolve in a bowl of soup is what change?
Answer:
Dissolving a solid in liquid, such as table salt in water, is a physical change because only the state of the matter has changed.
Explanation:
When a spoonful of table salt (sodium chloride, NaCl) dissolves in a bowl of soup, a physical change occurs because, the chemical composition of the salt (sodium chloride) remains the same; it's just dispersed in the liquid. This change is known as dissolution or dissolving.
Here's what happens;
Physical Mixing: When you add the salt to the soup, the salt crystals mix with the liquid soup. The salt particles spread out and become evenly distributed throughout the soup.
Solute and Solvent: In this process, the salt is the solute, and the soup is the solvent. The solute is the substance being dissolved (salt), and the solvent is the substance that does the dissolving (soup).
Ion Formation: As the salt crystals dissolve, the sodium (Na+) and chloride (Cl-) ions that make up the salt separate from each other. The water molecules in the soup surround and interact with these ions, helping to pull them apart from the crystal structure.
Ionic Interaction: The charged ions from the salt interact with the polar molecules in the soup, particularly the water molecules. This interaction forms a solution, where the salt ions are evenly dispersed throughout the liquid.
Homogeneity: The resulting mixture appears uniform and homogeneous. You can't easily distinguish the salt from the soup, and the taste of the soup becomes salty due to the presence of dissolved salt ions.
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Light-DEPENDENT reactions do NOT involve which of the following?
A. sunlight
B. chlorophyll
C. water
D. carbon dioxide
Answer:
The answer to your question is D. carbon dioxide
Explanation:
Light-DEPENDENT → The light-dependent reactions convert light energy into chemical energy.
What is the answer with the proper significant figures 7.6+2.401+0.68=
Answer:
10.7
Explanation:
The addition of 7.6 + 2.401 + 0.68 = is 10.681.
According to the addition of sig figs, you want your answer to have the same amount of places, after the decimal point, as the least sig-fig figure.
7.6
2.401
0.68
+
----------
10.681 - Draw a line straight down from the least sig-fig figure (7.6)
So the maximum figure after the decimal point is one. Since 8 is greater than 5, you have to round up from 10.6 to 10.7.
What term refers to a group of nerve cells that are connected to one another?
A. neuron
B. nerve network
C. brain
D. cerebrospinal fluid
Which letter in the diagram represents the transition from liquid to gas?
A
B
C
D
B, D in the diagram represents the transition from liquid to gas. A phase diagram is a sort of figure that is used in physical chemistry.
What is phase diagram?A phase diagram is a sort of figure that is used in physical the field of chemistry engineering, mineralogy, as well as materials science to demonstrate the conditions (pressure, temperatures, volume, etc.) that exist when thermodynamically different phases (such solid, liquid, or gaseous states) arise and coexist at equilibrium.
Lines of equilibrium, also known as phase boundaries, or circumstances under which different phases may exist at equilibrium, are typical elements of a phase diagram. Phase changes take place along equilibration lines. Despite their frequent occurrence, metastable phases are not equilibrium phases, hence they are not depicted on phase diagrams. B, D in the diagram represents the transition from liquid to gas.
Therefore, B, D in the diagram represents the transition from liquid to gas.
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In 1988, three gray whales were trapped in Arctic ice. Television crews captured the frantic attempts of hundreds of people to save the whales. Eventually, a Soviet icebreaker and U.S. National Guard helicopters arrived to help free the whales. The cost of the rescue mission exceeded $5 million.
i. Write a scientific question related to the whale story.
ii. Write a nonscientific question related to the whale story.
The scientific question related to the whale story is how were the whale's rescued? The non-scientific question related to the whale story is what was the need for spending such large amount of money?
What is a scientific question?It is a one where an investigation can be designed and can be approached to completion in order to find out an answer.This can be done without doing different investigations.
It should have valuable information and should have the potential that it can be answered by direct observations.It should always lead to a hypothesis.
A scientific question must have the following characteristics:
It must have an objective and should be testable.It should focus on an independent variable and a dependent variable.It should be feasible and coherent.Whereas, characteristics of a non -scientific question is that they are broad,and have many variables to be tested.
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Describe the five layers of the earth by providing the following information for each layer:
Name of the layer
Composition
Average temperature
Average thickness
make simple! pls
Answer:
answers below
Explanation:
Lithosphere/ Crust- made of large plates that move, average thickness is 30 km, average temperature is 25 degrees Celsius
Inner Core- made of solid iron, 1,200 km thick, 7,000 degrees Celsius
Outer Core- made of a dense liquid of iron and sulfur, 2,250 km thick, 4,000 degrees Celsius
Lower Mantle- made of solid rock, 2,200 km thick, 3,000 degrees Celsius
Asthenosphere/ Upper Mantle- made up of solid rock that flows due to plasticity, 720 km thick, 850 degrees Celsius
Describe how you will separate suspension from colloidal solution?
Answer:Unlike those in a suspension, particles in a colloid do not separate when sitting still. The particles in a suspension may be separated by filtration unlike those in a colloid. Colloids are able to scatter light, but suspensions cannot transmit light
17 Polly has a pencil that is 21 cm long. How long is the pencil
Answer:
The pencil is 8.268 inches
when an ion has a positive charged what has the highest value of this ion ?
is it
proton
neutron
electron
nucleon
and why?
Answer:
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CONTENTS
PHYSICAL GEOLOGY
Chapter 2 Minerals
2.1 Electrons, Protons, Neutrons, and Atoms
All matter, including mineral crystals, is made up of atoms, and all atoms are made up of three main particles: protons, neutrons, and electrons. As summarized in Table 2.1, protons are positively charged, neutrons are uncharged and electrons are negatively charged. The negative charge of one electron balances the positive charge of one proton. Both protons and neutrons have a mass of 1, while electrons have almost no mass.
Table 2.1 Charges and masses of the particles within atoms
Elementary Particle Charge Mass
Proton +1 1
Neutron 0 1
Electron −1 ~0
The element hydrogen has the simplest atoms, each with just one proton and one electron. The proton forms the nucleus, while the electron orbits around it. All other elements have neutrons as well as protons in their nucleus, such as helium, which is depicted in Figure 2.2. The positively charged protons tend to repel each other, and the neutrons help to hold the nucleus together. The number of protons is the atomic number, and the number of protons plus neutrons is the atomic mass. For hydrogen, the atomic mass is 1 because there is one proton and no neutrons. For helium, it is 4: two protons and two neutrons.
For most of the 16 lightest elements (up to oxygen) the number of neutrons is equal to the number of protons. For most of the remaining elements, there are more neutrons than protons, because extra neutrons are needed to keep the nucleus together by overcoming the mutual repulsion of the increasing numbers of protons concentrated in a very small space. For example, silicon has 14 protons and 14 neutrons. Its atomic number is 14 and its atomic mass is 28. The most common isotope of uranium has 92 protons and 146 neutrons. Its atomic number is 92 and its atomic mass is 238 (92 + 146).
helium atom
Figure 2.2 A depiction of a helium atom.
The dot in the middle is the nucleus, and the surrounding cloud represents where the two electrons might be at any time. The darker the shade, the more likely that an electron will be there. An angstrom (Å) is 10-10m . A femtometre (fm) is 10-15m. In other words, a helium atom’s electron cloud is about 100,000 times bigger than its nucleus.
Electrons orbiting around the nucleus of an atom are arranged in shells — also known as “energy levels.” The first shell can hold only two electrons, while the next shell holds up to eight electrons. Subsequent shells can hold more electrons, but the outermost shell of any atom holds no more than eight electrons. The electrons in the outermost shell play an important role in bonding between atoms. Elements that have a full outer shell are inert in that they do not react with other elements to form compounds. They all appear in the far-right column of the periodic table: helium, neon, argon, etc. For elements that do not have a full outer shell, the outermost electrons can interact with the outermost electrons of nearby atoms to create chemical bonds. The electron shell configurations for 29 of the first 36 elements are listed in Table 2.2.
from the illustration of the potassium atom fill in the periodic table selection
Answer:
2 electrons
8 electrons
8 electrons
1 electron (just count in the rings for these ones)
19 protons (it says "P=19" in the middle. The P stands for Protons)
K (it's from Latin medieval Latin "kalium")
39 (add proton and neutron amounts to get the approximate atomic mass--electrons are negligible)
Explanation:
What is the electron configuration for Cs^1+ ?
Answer:
electron configuration Cesium Electronic Configuration [Xe] 6s1
Explanation:
Which two of these formulas have an equal number of carbon atoms present?
1 - MG3(PO)2
2 - Na SO4
3 - NO3(CH3)3
4 - C&H 206
5 - Al(NO3)3
3 and 4
1 and 2
3 and 5
3, 4, and 5
Choose the correct answer.
Answer:3 and 4
Explanation:I got it right on a quiz.
Answer:
3 & 4
Explanation:
MARKING BRAINLIEST!! HURRY
A car moves on the road and a rock falls off a cliff.
Which statement is correct?
Both car and rock have kinetic energy.
Both car and rock have only potential energy.
The car has only kinetic energy and the rock has only potential energy.
The car has zero potential energy and the rock has zero kinetic energy.
Answer:
3rd choice
Explanation:
Answer:
they both have kinetic energy
Explanation:
because they are both in motion
draw a conclusion a weather balloon carries sensing instruments very high altitudes to detect weather information. a weather balloon is filled near earth's surface with a low density gas. describe what happens to the particles the pressure, and the volume inside the balloon as it rises.
Answer:
im sorry the answer if i did i would
Explanation:
Why is land more vulnerable to wind erosion during droughts?
A: Excessive rainfall causes soil to erode.
B: Plants that hold the soil die off.
C: High temperatures dry out the soil.
D: Cold temperatures cause soil to freeze.
Which electron transition would result in the emission
of energy?
A) 3s to 4s
B) 3p to 4p
C) 3s to 3p
D) 4p to 4s
HELP PLEASE!!
Answer:
When the electron transits from an excited state to its lower energy state, it will gice off the same amound of energy needed to raise to that level. This emitted energy is a photon.
The answer is C, 3s to 3p.
Which electron transition emits electromagnetic radiation with the highest energy?
n = 2 to n = 1
n = 6 to n = 2
n = 6 to n = 3
n = 4 to n = 1
Answer:
So, you can say that in a hydrogen atom, an electron located on
n i=2
that absorbs a photon of energy
4.85⋅10−19
J can make the jump to n f=6.
what is kinetic enegry
Kinetic energy → the kinetic energy of an object is the energy that it possesses due to its motion
For an example ↓
3. What is the picture displayed? *
1 point
Captionless Image
Answer:
(not sure what's the question ) Captionless image??
I WILL MARK YOU BRAINLIST
what is the difference between an element and an isotope
Answer:
An isotope is one of two or more forms of the same chemical element. Different isotopes of an element have the same number of protons in the nucleus, giving them the same atomic number, but a different number of neutrons giving each elemental isotope a different atomic weight.
Explanation:
I hope you have a nice day and please mark me(:
Answer: Elements are simply what you see on the periodic table. E.g. carbon, oxygen, hydrogen etc. Isotopes are elements with different masses. ... So isotopes have the same amount of protons but with different amounts of neutrons.
Explanation: plz mark brainliest!
PLEASE HELP ME WITH THID IFK IT!! ILL GIVE YOU EXTRA POINTS
A reaction occurs that results in a molecule with two atoms of the same element. The atoms share six electrons. Which molecule could be the product of the reaction?
Si2
N2
O2
F2
Answer:
n2 is correct
Explanation:
i took it just now. :)
The product of this reaction could be N2.
Among the options, only atoms of nitrogen have five electrons on their outermost shell.
The fact that they have five electrons in their outermost shells implies that they can combine by sharing six electrons in a triple bond.
When this occurs, each of the nitrogen atoms involved in the bond now has an octet of electrons. Hence, the product formed when the atoms share six electrons. Which molecule could be the product of the reaction is N2.
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What molecular shape is oxygen dibrimide
Answer:As predicted by VSEPR theory, the molecule adopts a "bent" molecular geometry similar to that of water.
Explanation:
Under which of the following circumstances might a person develop capgras delusion?
A. during childhood as a result of an emotional shock
B. as a result of a family predisposition to the condition
C. following a head injury that cause brain trauma
D. due to normal aging processes on the brain
Answer:
a
Explanation:
one two three four five six
Answer:
7
8
9
10.
better check book pages for this kinda answer.
Balance the following equation:
C2H5NH2(g) + O2(g) →
CO2(g) + H2O(g) + N2(g)
Answer:
4C2H5NH2(g) + 15O2(g) → 8CO2(g) + 14H2O(g) + 2N2(g)
Explanation:
The balanced chemical equation for the given chemical reaction is 4 C₂H₅NH₂(g) + 15 O₂(g) → 8 CO₂(g) + 14 H₂O(g) + 2 N₂(g).
What is chemical equation?Chemical equation is a symbolic representation of a chemical reaction which is written in the form of symbols and chemical formulas.The reactants are present on the left hand side while the products are present on the right hand side.
A plus sign is present between reactants and products if they are more than one in any case and an arrow is present pointing towards the product side which indicates the direction of the reaction .There are coefficients present next to the chemical symbols and formulas .
The first chemical equation was put forth by Jean Beguin in 1615.By making use of chemical equations the direction of reaction ,state of reactants and products can be stated. In the chemical equations even the temperature to be maintained and catalyst can be mentioned.
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Please help me with the following question below:
Molarity as Stoikiometri
Level : SHSEquatuions od Molarity :
M = m/Mr × 1000/V
Mr Lithium Dichromate (Li2CrO4)
= Ar Li (2) + Ar Cr + Ar O (4)
= 7 (2) + 52 + 16 (4)
= 14 + 52 + 64
= 130 g/mol
Molarity
= m/Mr × 1000/V
= 19.5 g/130 g/mol × 1000/95 mL
= 0.15 mol × 10.53 /L
= 1.5795 mol/L
So, the molarity of the solution is 1.5795 mol/L
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