Answer:
chemical stability is important to consider in the comprehensive assessment of pharmaceutical properties, activity, and selectivity during drug discovery.
Answer:
In general, molecules are stable because all their constituent atoms have sufficient "valence" electrons-that is, electrons that participate in chemical bonding. Such electrons reside in the outer, or valence, "shell," which must fill up with the appropriate number of electrons for the bound atoms to be come stable.
Explanation:
Ryan and Abigail are conducting an experiment. They place six ice cubes into a beaker and find the combined mass. They allow the ice cubes to melt and find the combined mass of the beaker and the liquid water.
A
A
Before
After
What can the students expect to be true about the two masses?
The mass of the ice cubes will be greater because solids are more dense.
The mass of the ice cubes will be greater because they took up more space in the beaker.
The mass of the ice cubes and the water will be equal because the same amount of matter is in the beaker
The mass of the ice cubes and the water will be equal because their particles have the same amount of energy
B
c
С
D
The mass of the ice cubes and the water will be equal because the same amount of matter is in the beaker.
Matter is anything that has mass and occupy space. All substances are composed of matter. According to the law of conservation of mass, matter can neither be created nor destroyed but can be converted from one form to another.
Since mass is the quantity of matter in a substance, the mass of the ice cubes and the water will be equal because the same amount of matter is in the beaker.
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Alan has been driving 20 mph for the last half hour. The truck next to him has been there for a while now, so Alan is
correct to assume that the
A)
)
truck is parked.
B)
speed of the truck is 10 mph.
speed of the truck is 20 mph.
D)
speed of the truck is 30 mph.
what is the maximum number of electrons in an atom n=4 l=1 ml=0
Answer:
18 electrons
Explanation:
when l=1, this tell you that it is "p sub shell"
what is the pattern of liquids and solids from the center of the earth out
Explanation:
I'm sorry if this doesn't answer this correctly but solid liquid solider solid liquid/solid
When the balancing of the equation for the reaction,
Mno(aq) +H_C20. (aq) +H* (aq) —— Mn* (aq) + CO2() +H200)
? 8
taking place in acidic media is properly completed, what is the sum of ALL the coefficients in the
equation?
a. 31
b. 33
c. 32
d. 30
e. 29
Answer:
hhhhh
Explanation:
jsjsjdjddfrtttrjsjjdhhdhfhhfhfhhrheidjhf
what additional reaction product would result if naoh was used as a base in this reaction instead of k2co3?
Answer:
What reaction product would result if NaOH was used as a base in this reaction instead of K2CO3? If sodium hydroxide was used as the base of the reaction, then the reaction product formed would be an ethyl alcohol because it would undergo a hydrolysis reaction with addition of iodoethane
The entire carbonation reaction demonstrates how potassium carbonate (K2CO3) combines with water and carbon dioxide to create potassium bicarbonate (KHCO3) when exposed to combustion flue gases at low temperatures (40 to 80 °C) (Reaction 1)
What takes place when K2CO3 and water interact?In an extremely violent and exothermic reaction, potassium carbonate splits into potassium and carbonate ions when it interacts with water. When the ions interact, potassium oxide and carbonic acid are created.
K2CO3 come from : Potassium carbonate is a common ingredient in the manufacture of soap and glass. Additionally, it serves as a light drying agent. This substance is used as a buffering agent in numerous wine making procedures. Another usage for potassium carbonate is as a fire extinguisher.
K2CO3 created : Commercially, potassium carbonate is made by reacting potassium hydroxide with carbon dioxide:
2 KOH + CO2 = K2CO3 + H2.
K2CO332H2O sesquihydrate crystallizes from the solution ("potash hydrate").
The anhydrous salt is produced by heating this solid at 200 °C (392 °F).
It disintegrates into K2O+CO2 around 1200 C. (allreaction)
By converting carbonate into carbon dioxide and water, potassium carbonate can act as a base by forming potassium hydroxide.
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the positon of hydrogen is conversial in mendleevs perodic table give reason
Answer:
the position of hydrogen is controversial in periodic table because hydrogen is the only element with out neutron. it belongs to 1 st group but it is not placed there .
Explanation:
A 10.0 cm sample of copper has a mass of 89.6 g. What is the density of copper?
Answer:
19.3 g/cm3
Explanation:
plz give branliest
can somebody please helpppp???
Answer:
aluminum is highly reactive
Answer:
Aluminum is highly reactive
Explanation:
Chemical property is defined as the property in which chemical composition of the substance changes.
For example, reactivity, oxidation state, inflammability etc are all chemical properties.
Therefore, we can conclude that out of the given options, Aluminum is highly reactive depict a chemical property of aluminum.
Since sodium chloride is classified as a compound, a sample of it contains
A. atoms that are gases, liquids, and solids.
O
B. more than one kind of atom.
C. matter that cannot be reduced to atoms.
O
D. a solution of atoms and molecules.
Answer:
more than one kind of atom. a solution of atoms and molecules.
Explanation:
a compound always contains more than one type of atom.
Although the formula for sodium chloride is NaCl, the compound does not contain actual NaCl molecules. Rather, it contains equal numbers of sodium ions with a charge of positive one (Na+) and chloride ions with a charge of negative one (Cl−).
Which of the following has the most thermal energy?
A full-size candy bar that is melting
A swimming pool on a sunny day
The entire atmosphere of the earth
1 gallon of boiling water
The one that has the most thermal energy out of the following is 1 gallon of boiling water.
Thermal energy is the energy generated by a material as a result of particle movement inside the material. Thermal energy causes things to have an internal temperature, which may be measured. The greater the temperature measured, the quicker the particles travel within the system.
The full-size candy bar that is melting melts at a slower particle rate compared to the 1 gallon of boiling water whose particles travel faster.
A swimming pool on a sunny day has average thermal energy. Also, the entire atmosphere of the earth may not experience the same amount of thermal energy from the sunlight.
Therefore, we can conclude that the most thermal energy out of the following is 1 gallon of boiling water.
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Que relación tiene el metabolismo celular con el mantenimiento de los seres vivos
Im doing a science project and need examples and non-examples of an Atom. some examples of an atom is neon, hydrogen, argon, etc so I got that part. But what are some non-examples of an atom and why?
Answer:
Anything not on the periodic table is an element non example! ... So, for a substance to be an element, all of its atoms must have the same number of protons. Examples of elements include hydrogen, lithium, nickel, and radium.
Explanation:
Non-examples of an atom refer to entities that are not considered atoms.
Molecules consist of two or more atoms chemically bonded together. They are not considered individual atoms because they contain multiple atoms connected by chemical bonds.
Ions are electrically charged particles formed when atoms gain or lose electrons. They can be positively charged (cations) or negatively charged (anions).
Subatomic particles are the constituents of atoms. They include protons, neutrons, and electrons.
Compounds are substances composed of two or more different elements chemically combined.
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Give example of 1 solid, 1 liquid and 1 gas solution.
Captionless Image
Someone pls help me I will make you brain
Answer:
Its the first one
Explanation:
I learned this before
What are the three principles of Kinetic Molecular Theory
Answer:
The simplest kinetic model is based on the assumptions that: (1) the gas is composed of a large number of identical molecules moving in random directions, separated by distances that are large compared with their size; (2) the molecules undergo perfectly elastic collisions (no energy loss) with each other and with the
Explanation:
Which terrestrial ecosystem is characterized by almost no rainfall, very hot days, and very cold nights?
A. Tundra
B. Temperate forest
C. Desert
D. Grassland
Which two conversion factors would be used to convert the quantity of 4500 seconds into hours.
Answer:
the answer is A
Explanation:
in 60 seconds there is 1 minute and in 60 minutes there is one hour
What is the least apporaiate hypothesis for Eric to make?
Answer:
Where's the questions?
Which answer choice is it?
A 3d
B 4p
C 4d
D 4f
Answer:
3d
Explanation:
What type of bond if formed between the atoms of this type of compound
Answer:
The main component are electrons.
A chemical bond is any attractive interaction that keeps atoms short. This interaction can be directional as the bond between two atoms within a molecule, or non-directional as the electrostatic interaction that keeps the ions of an ion crystal in contact. It can be strong like the two previous examples, or weak as van der Waals interactions that are dipolar in nature.
Many models exist to describe these interactions. For example, the chemical bond between two atoms within a molecule can be described with the Lewis model or with a quantum model, like the theory of molecular orbitals. In both cases, the origin of the interaction is a sharing of electrons between the two partner atoms of the chemical bond.
There are three types of chemical bonds: single bonds, double bonds, and triple bonds. Indeed, the type of chemical bond depends on the number of electrons shared between the bound atoms:
* Simple bonds have 2 shared electrons.
* Double bonds have 4 shared electrons.
* Triple bonds have 6 shared electrons.
This number of electrons shared between the atoms depends on the electronic structure of these atoms and thus on the rules of the byte and the duet.
A(n) ___ is a compound that dissolves in water to produce hydrogen ions in solution. A(n) ___ produces hydroxide ions. Acids have a ___ taste and bases have a ____ taste. Both acids and bases conduct ____ and are ____. A pH of ____ is neutral. A pH of 6 is ___ and a pH of 14 is a __
Answer:
see explanation
Explanation:
Question
A(n) ACID is a compound that dissolves in water to produce hydrogen ions in solution. A(n) _BASE__ URhydroxide ions. Acids have a SOUR___ taste and bases have a BITTER____ taste. Both acids and bases conduct _ELECTRICITY___ and are _REACTIVE___. A pH of7 ____ is neutral. A pH of 6 is _ACIDIC__ and a pH of 14 is a BASIC__
which word best describes a substance where its atoms and molecules are moving very fast?
Answer:
solids
Explanation:
because in ice for instance the molecules and atoms are shivering so the move fast to stay warm
a. Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Answer:
Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Which line represents travel at the fastest speed? Justify your answer.__
b. Describe the line that should be added for an object that is not moving with respect to the chosen reference point.__
Answer the question using 5 complete sentences and the vocabulary terms; velocity, position, and distance
Explanation:
Someone pls help me I will make you brain
Answer:
more drought is not a global warming
Answer:
i think it is human migration
because when drought becomes more its one sign of global warming and when land becomes less there wont be place for people to plant trees
What is the v if = 8 m and f = 20 Hz?
Answer:
Explanation:
it is 980
What is it called when a substance is in-between two states of matter?
Answer:
There are four natural states of matter: Solids, liquids, gases and plasma. The fifth state is the man-made Bose-Einstein condensates. Solids.
Explanation:
Hope this helps you out!!
Calculate the number of moles of NH3 formed by the reaction of 2 moles of N2 and 2 moles of H2,N2(g) + 3H2(g) forms 2NH3(g)
Answer:
we have to find the number of moles of NH₃ formed by reaction of 2 moles of N₂ and 2 moles of H₂. ... ∴ 2 moles of hydrogen will give = 1.33 moles of ammonia. therefore the no of moles of ammonia after the reaction would be 1.33 moles
Physical change definition.
NO links, please.
Answer:
a usually reversible change in the physical properties of a substance, as size or shape:
Freezing a liquid is a physical change.
Explanation:
Answer:
Hey!
Explanation:
The definition of physical change can be expressed as.. let's say.. the physical difference in an organism. Physical change affects the form of a chemical substance, but not its chemical composition. Hope this helps! :)
What did the periodic table help scientists discover?
Scientists can use the table to analyze reactivity among elements, predict chemical reactions, understand trends in periodic properties among different elements and speculate on the properties of those yet to be discovered.