Answer:
Potassium iodide is a metal-halide salt that has an ionic connection between the potassium cation (K+) and the iodide anion (I–). It is colorless to white and appears as cubical crystals, powder, or white granules. It has a salty, astringent flavor. This chemical is made from iodine and potassium hydroxide.
.
Which of the following describes Pluto?
1. asteroid
2. moon
3. planet
4. dwarf planet
Answer:
4. dwarf planet
Explanation:
Why do we use the mole concept ??
Answer:
Here
Explanation:
Chemists need the mole concept to bridge the gap between the microscopic world of atoms to the macroscopic world of humans. As you know, the molecular level consists of particles that are invisible to us.
Answer:
it allows us to count atoms and molecules by weighing macroscopic amounts of material.
how many feet are equal to 25.51 dm
Answer:
8.3 feet
hope this helps! <3
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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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.
Suppose a high-flying jumbo jet with a mass of 45,000 kg cruises at constant velocity when the thrust of its engine is a constant 80,000 N. What is the acceleration of the jet?
Answer:
1.78 m/s²Explanation:
The acceleration of an object given it's mass and the force acting on it can be found by using the formula
[tex]a = \frac{f}{m} \\ [/tex]
f is the force
m is the mass
From the question we have
[tex]a = \frac{80000}{45000} = \frac{80}{45} \\ = 1.77777...[/tex]
We have the final answer as
1.78 m/s²Hope this helps you
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Balance the following equation:
C7H602 + 02 -- CO2 + H20
Answer:
Explanation:
2C7H6O2 + 15O2 → 14CO2 + 6H2O.
what kind of reaction is happening when glaze is fired
Answer:
Oxidation and Reduction occurs
Explanation:
hello does anyone get this????????????? pls help
Explanation:
physical changes : boiling water, freezing water, a pencil being sharpened.
chemical change : rotting cheese, exploding dynamite.
Answer:
boiling water
a pencil being sharpened
freezing water
Explanation:
A change that does not lead to any difference in chemical composition of a substance is known as a physical change.
For example, shape, size, mass, volume, density, boiling point, etc of a substance are all physical properties.
On the other hand, changes that lead to bring change in chemical composition of a substance is known as a chemical change.
For example, exploding dynamite, rotting cheese etc are all chemical changes.
Chemical change is the change in which there is rearrangement of atoms and the new substances get formed.
Boiling water only changes the phase from liquid to gas and thus is a physical change.
Pencil on being sharpened only gets smaller in size and thus is a physical change.
exploding dynamite would result into formation of new substances and hence a chemical change.
Freezing water only changes the phase from liquid to solid and thus is a physical change.
Rotting cheese would result in formation of new substances and hence a chemical change.
Therefore, we can conclude that following are the physical changes in matter.
boiling water.
a pencil being sharpened.
freezing water.
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:
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Explanation:
jsjsjdjddfrtttrjsjjdhhdhfhhfhfhhrheidjhf
Ionic bonds form between which two types of elements?
Answer:
Ionic bonds usually occur between metal and nonmetal ions. For example, sodium (Na), a metal, and chloride (Cl), a nonmetal, form an ionic bond to make NaCl.
Explanation:
Answer:
metal and nonmetal ions
Explanation:
Calculate the number of moles of alkali in 25cm3 of NaOH solution used.
Answer:
0.001mol
Explanation:
volume (NaOH) =25cm³ =0.025dm³
molar volume = 22.4dm³
n = V = 0.025 = 0.001mol
Vm 22.4
CHEMMMMMMMMM HELPPPPPP PLEASEEEE
Answer:
: \large \boldsymbol {\rm x > 5 \ or \ x\in (5\ ; \ \infty ) }x>5 or x∈(5 ; ∞)
Step-by-step explanation:
\begin{gathered}\large \boldsymbol {} \displaystyle -2(3x+2) > -8x+6 \\\\ -6x-4 > -8x+6 \\\\ 8x-6x=6+4 \\\\ 2x > 10 \\\\ x > 5 \ or \ x\in (5\ ; \ \infty )\end{gathered}
−2(3x+2)>−8x+6
−6x−4>−8x+6
8x−6x=6+4
2x>10
x>5 or x∈(5 ; ∞)
how do anion formation and valence electrons relate?
Answer:
A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.
Answer:
A cation is formed when a metal ion loses a valence electron while an anion is formed when a non-metal gains a valence electron. They both achieve a more stable electronic configuration through this exchange.
Explanation:
Hope I helped!
what is formed when the number of electrons is changed?
Answer:
Explanation:
Whether the electrons are added or given away makes no difference to the name given to parent atom -- It is called an ion which means that it has a charge. The word atom is reserved for something on the periodic table that has no charge.
Answer: Chemical bond formed when one or more electrons are transferred from one atom to another.
Explanation: Give me the brainiest
an increase in enzyme or substrate concentration will
Answer: It will increase the rate of reaction
Explanation:
An increase in enzyme or substrate concentration will increase the rate of reaction.
What is an enzyme?An enzyme is a biological catalyst and is almost always a protein. It speeds up the rate of a specific chemical reaction in the cell.
Initially, an increase in substrate concentration leads to an increase in the rate of an enzyme-catalyzed reaction. As the enzyme molecules become saturated with substrate, this increase in reaction rate levels off.
The rate of an enzyme-catalyzed reaction increases with an increase in the concentration of an enzyme.
Hence, an increase in enzyme or substrate concentration will increase the rate of reaction.
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In a molecule, how do we show what types of atoms are there and how many atoms there are of each type.
A scientist studying the properties of two different gases recorded this data. If the scientist wants to study gas samples A and B at
standard temperature and pressure (STP), what must she do before continuing experimentation?
Answer:
C. Decrease the pressure of Gas A and increase the temperature of Gas B.
Explanation:
The values for standard temperature and pressure (STP) are zero degrees Celsius and one atmosphere. Since the temperature of gas A is higher than zero degrees, it will have to be reduced. Since the pressure of gas B is less than one atmosphere, it will have to be increased.
The atomic number equals blank of blank electrons
Answer:
The atomic number equals number of protons and electrons
This is true when an atom is in neutral state.
A field of many different species of wildflowers would be considered a(n) _____________.
a
organism
b
population
c
community
d
ecosystem
e
biome
f
biosphere
Answer:
That would be a community.
Explanation:
A field of many different species of wildflowers is considered to be a community.
What is community in biological terms?It is called biological community meaning an interacting group of various species sharing a common location.Factors which determine overall structure of community are number of species, abundance of each species,interaction among the species and community's ability to return to normal after a natural calamity.
Change of communities over a period of time is called as ecological succession.Each species in a community has its own characteristic niche . The niche includes all the interactions of the species with other members of the community.An ecosystem comprises of biological community together with its physical environment.
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NEED HELP ASAP!!!!!!!!!!!!!!!!!!!!!!
A noble gas has 8 electrons between the p and s orbitals of the outer shell. Helium is the exception because it only has two electrons.
∴ 1s²2s²2p⁶ is the noble gas (neon)6. Potential energy can be
transformed into kinetic energy
of force is applied to the object.
True or false?
Answer:
true
Explanation:
because there is love in the universe and we converse in each others mind soul brain time stone
If you weighed the atoms that appear on the reactant side of the equation, would they have the same mass as the atoms that appear on the product side?
Answer:
Yes,they will have the same mass.
Explanation:
According to law of conservation of mass:
'Mass can neither be destroyed nor be created during a chemical reaction'
In a balanced chemical reaction :
Total numbers of atoms on the reactants side are always equal to the total numbers of atoms on the product side.
Total mass of the atoms on the reactant side of the equation is always equal to the total mass of atoms on the product side.
For example:
Number of atoms on reactant side =
=(2)2 Hydrogen atoms + (1)2 Oxygen atoms = 6 atoms
Number of atoms on the product side =
=(2)((2 Hydrogen atoms) + (1 Oxygen atoms)) = 6 atoms
Mass of of reactants = (2)(number of hydrogen atoms)(mass of hydrogen atom) + (1)(number of oxygen atoms)(mass of oxygen atoms)
= (2)(2)(1u)+(1)(2)(16u) = 36u
Mass of products = 2((number of hydrogen atoms)(mass of hydrogen atom)+(number of oxygen atoms)(mass of oxygen atom))
= 2((2)(1u)+(1)(16u)) = 36u
Mass of of reactants = Mass of products = 36u
how does a phenol red-containing solution look if co2 level is low?
Answer:
The variables to be examined in relation to carbon dioxide use are the amount of light exposure and amount of dissolved CO2. Phenol red is yellow/orange under acidic conditions, that is when the pH of the solution is less than 7 (e.g. pH = 6). This occurs when the concentration of CO2 is high.
Explanation:
is this correct
A phenol red-containing solution with low CO2 level will appear red.
Phenol red is a substance that serves as an indicator. It changes in colouration in response to the acidity or alkalinity of solutions.
In acidic solutions, phenol red turns yellow while the colour is red in basic solution.
Solutions with high CO2 levels are acidic while those with little to no CO2 concentrations are basic.
Thus, in a low CO2 solution, phenol red will turn red and the solution will generally appear red.
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Which immunization is available to prevent communicable disease and illness?WILL MARK BRAINLIEST 30 PTS
bronchitis
diabetes
measles
strep throat
Measles is a communicable disease that requires immunization to prevent illness when exposed to it.
Measles is a communicable disease and highly contagious. It is usually very serious in children. The disease can be contacted through droplets in the air, physical contact and through mother-to-child transmission.
It is a very serious disease as it is caused by a virus which replicates very fast in the throat and nose thereby creating symptoms such as runny nose, coughing, sneezing and is usually accompanied with a rash.
The severity and death rates is what gave rise to the creating of a measles vaccine which is usually given to babies after birth to make them immune to the potential exposure to the virus.
Diabetes, bronchitis and strep throat have no vaccine as they can always be treated or managed with over-the-counter drugs.
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Which statement describes a similarity between an apple and gasoline
Answer:
They both contain chemical energy, which people and cars convert into mechanical energy.
Explanation:
Answer:
B)They both contain chemical energy, which people and cars convert into electrical energy.
Explanation:
Is chlorine a substance or a mixture
Answer:
its a substance
Explanation:
hello can anyone help me with this question thx
Answer:
A. W and X
Explanation:
Because W have just one valence electron, and X have 7, so it means that W will give its electron to X and that's the definition of an ionic bond
Help meeeeeeeeeeeeeee
AMSWER :
CHEMICAL FORMULA :
• WATER - H2O
• CARBONDIOXIDE - CO2
• SODIUM HYDROXIDE - NaOH
• SULPHURIC ACID - H2SO4
• SODIUM CHLORIDE - NaCI
• SODIUM BICARBONATE - NaCHO3
