a sample contains 4.0x10^25 molecules of hydrogen peroxide (H2O2) how many hydrogen atoms would be in the sample?
What is bonding all about in chemistry?
Answer:
It is like about a attraction between atoms, molecules, and more.
Help please!
Describe Bohr’s model of the hydrogen atom
Explanation:
Bohr's model of the hydrogen atom is based on three postulates: (1) an electron moves around the nucleus in a circular orbit, (2) an electron's angular momentum in the orbit is quantized, and (3) the change in an electron's energy
The compound with the molecular formula C4H10 is called
Answer:
butane
Explanation:
I hope this helps!
Answer:
Butane
...............
The ____ are new substances that are created following a chemical reaction. *
A:chemical reactions
B:products
C:reactants
D:coefficients
Answer:
b
Explanation:
What does it mean when someone has done multiple trials? A. They have performed an experiment once and reported their findings. B. They have performed a scientific experiment more than once. C. They have performed an experiment that can only be performed once. D. They have designed an investigation to answer a question.
A. They have performed an experiment once and reported their findings.
4.A 100 L sample of gas is at a pressure of 80 kPa and a temperature of 200 K. What volume does the same
sample of gas occupy at STP?
Answer:
V₂ = 107.84 L
Explanation:
Given data:
Initial volume = 100 L
Initial pressure = 80 KPa (80/101 =0.79 atm)
Initial temperature = 200 K
Final temperature =273 K
Final volume = ?
Final pressure = 1 atm
Formula:
P₁V₁/T₁ = P₂V₂/T₂
P₁ = Initial pressure
V₁ = Initial volume
T₁ = Initial temperature
P₂ = Final pressure
V₂ = Final volume
T₂ = Final temperature
Solution:
V₂ = P₁V₁T₂ /T₁P₂
V₂ = 0.79 atm × 100 L × 273 K / 200 K × 1 atm
V₂ =21567 atm.L.K /200 K.atm
V₂ = 107.84 L
____ describes the quantity of solute that
can dissolve in a given amount of solvent at a
given temperature.
A. Viscosity
B. Solubility
C. Fluidity
D. Permeability
Answer:
B
Explanation:
What will happen to the volume of a gas if the Kelvin temperature of the gas is reduced to 1/4 of the original temperature and the pressure of the gas is halved?
The volume of the gas will be 1/8 of the original volume.
The volume of the gas will remain the same.
The volume of the gas will be 1/6 of the original volume.
The volume of the gas will be half of the original volume.
Answer:
the volume of the gas will be 1/8 of the original value
Explanation:
When the pressure of a gas doubles, the new volume
Answer:
yes it does
Explanation:
g (True/false)Sodium borohydride, NaBH4, is a reducing reagent which converts carbonyl to carboxylic acids
Answer:
False
Explanation:
Sodium borohydride, NaBH4 is a reducing agent. The conversion of a carbonyl to carboxylic acids is an oxidation reaction.
Sodium borohydride, NaBH4 does not perform an oxidation reaction, it is only used for reduction reactions. Hence the statement in the question is false.
How can you change a objects state of matter
Answer:
Changing states of matter occur when matter loses or absorbs energy. When a substance absorbs energy the atoms and molecules move more rapidly and this increased kinetic energy pushes particles far enough, that they change form. This energy is usually heat or thermal energy.
Explanation:
Which properties of plastics are useful in transporting food and drink?
Answer:
mark me brainlist plzzzzzzzzzzzzzz
Explanation:
Answer: In plastic, particles are very much tightly packed ,so food and drink kept in it do not get spoiled easily and its contact with environment gets cut off. So it is useful in transporting food and drink.
What is the nuclear charge of an atom of Silver?
A) +79
B) +47
C) +108
D) +61
Answer:
47 is your correct ans, which is b
what is the smallest division on 4 balance
Answer:0.1g
Explanation:
Answer: The smallest scale division is a tenth of a centimeter or 1 mm.
Explanation: I got this from a website but I hope it helps!
What best defines a population
Answer:
A number of organisms in a specific area/place
Explanation:
During a chemical reaction, heat is absorbed. What kind of reaction occurred?
A) An endothermic reaction
B) An exothermic reaction
Answer:
Endothermic and exothermic reactions are chemical reactions that absorb and release heat, respectively. A good example of an endothermic reaction is photosynthesis. Combustion is an example of an exothermic reaction. The categorization of a reaction as endo- or exothermic depends on the net heat transfer.
Explanation:
Answer:
An endothermic reaction
Explanation:
The heat is being absorbed so it's and endothermic reaction
Which of the following situations would cause light to refract?
When light passes from one medium to the other of different density, the light ray will bend. This is called refraction. Light moving from air to water cause refraction. Hence, option d is correct.
What is refraction ?Refraction is a phenomenon in which a light ray bent in its direction when passing from one medium to the other where the mediums have different densities.
The measure of bending of light in a medium is called refractive index of that medium. It depends on the density as well as velocity of light through the medium.
For example, when light passes from air to water or air to glass it bends. We can clearly observe the bending in the light ray at the boundary of the two mediums. Hence, option D is correct.
Find more on refraction:
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The options of your question were as follows:
A. traveling through a vacuum B. passing from one glass block to another C. moving through the air D. moving from air to water.
Convert the following into correct scientific notation:
(a) 496.3 x 10^2
(b) 7876.1 x 10^-7
(c) 0.089 x 10^-9
Answer:
4.963x 10²
7.8761x 10³
8.9 x 10⁻²
Explanation:
Scientific notation is the way to express the large value in short form.
The number in scientific notation have two parts.
. The digits (decimal point will place after first digit)
× 10 ( the power which put the decimal point where it should be)
for example the number 6324.4 in scientific notation will be written as = 6.3244 × 10³
a) 496.3 x 10²
4.963x 10²
b) 7876.1 x 10⁻⁷
7.8761x 10³
c) 0.089 x 10⁻⁹
8.9 x 10⁻²
Convert 3.52 × 10^22 atoms of gold to moles
Answer:
5.85 x 10⁻² mol Au
Explanation:
Divide the atoms of gold with Avogadro's number to find the solution.
Mercury completes one orbit around the Sun in 68 days.
a. True
b. False
Answer:
true :PP
Explanation:
China's net exports are represented by a positive integer. Explain what this tells you about imports and exports of China.
A.China's exports exceed imports by 120 billion c.
B.China's total exports are 120 billion dollars.
C. China's total imports are 120 billion dollars.
D. China's imports exceed exports by 120 billion dollars.
Please select the best answer from the choices provided.
A. A
B. B
C. C
D. D
Answer: the answer would be A
Explanation:
Answer:
A
Explanation:
Why doesn't glue stick to the inside of the bottle? (Not sure if this is chemistry or not lol)
Answer:
When white glue is in the bottle, there's not enough air inside the bottle to cause the water to evaporate to make the glue sticky. Basically, the bottle holds the glue from the air and keeps the glue from going everywhere.
Identify the two functional groups that react together to form the ester linkage between monomers in the PET polymer
Answer:
PET polymer or Polyethylene terephthalate is also known as Terylene. In the PET polymer, the ester linkage between the monomers is formed by the reaction of the OH group of ethylene diol (glycol) and the CO2H group of terephthalic acid.
In the family of polyester, PET is considered as the mostly used thermoplastic polymer resin.
It is used widely in clothing fibers, as liquid and food containers, and as a substance for engineering resins. In the United Kingdom it is known as terelyne, in the United States as Dacron, and in Russia as Lavsan.
The picture shows to containers filled with a gas, both initially at room temperature
AAA
Ice
Heat
Which statement is correct? (5 points)
The gas particles in both containers have the same average kinetic energy because they have equal number of particles
The gas particles in both containers have the same average kinetic energy because they have the same volume
The average kinetic energy of the gas particles is greater in container A because it has a lower temperature
The average kinetic energy of the gas particles is greater in container 8 because its particles move faster
Od
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
Option D is the correct statement. From the excerpt, it can be seen that container B is being heated. The heat that is applied to container B will make the temperature of the gas to increase, thereby increasing the average kinetic energy. This will cause the gas molecules to mover faster and with force hitting the walls of the gas container. At this time, pressure should increase. Also, the volume of the gas increases just as the temperature of the gas also increases.
Answer:
D. The average kinetic energy of the gas particles is greater in container B because its particles move faster.
Explanation:
GIVING BRAILIEST FOR ANSWER
Answer:
B
Explanation:
Answer:
c is the answer
Explanation:
One of the most common iron oxides is iron (III) oxide, known as rust. The chemical formula for rust is Fe2O3. Rust is formed when iron reacts with oxygen in moist air. The following chemical equation represents the reaction: 4Fe + 3O2 → 2Fe2O3.
which of the following shows correctly an ion pair and ionic compound the two ions from
Answer:
what are the choices?
Explanation:
Consider the equilibrium system described by the chemical reaction below, which has a value of Kc equal to 1.87 × 10⁻³ at a certain temperature. If 5.00 g of solid PH₃BCl₃ and 0.0700 g of BCl₃ are added to a 4.500 L reaction vessel, what will the equilibrium concentration of PH₃ be? SO CONFUSED BE VERY SPECIFIC especially WITH FINDING Qc.
Answer:
[PH₃(g)] = 0.0432M at equilibrium
Explanation:
Given: PH₃BCl₃(s) => PH₃(g) + PH₃(g); Kc = 1.87 x 10⁻³
*Let solids have concentration value = 1.0M and apply common ion (compound) effect to Ci b/c of 0.070g BCl₃ added initially.
PH₃BCl₃(s) => BCl₃(g) + PH₃(g
Ci: 5.00g 0.07g 0.00g
*≅1.0M(s) =0.07g/115.81g·mol⁻¹
= 6 x 10⁻⁶ mol
= 6 x 10⁻⁶mol/4.5L
= 1.3 x 10⁻⁴M = 0.00M
ΔC: -x +x +x
Ceq: 1M - x ≅ 1M = (1.3 x 10⁻⁴ + x)M = x
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + x)(x) = 1.87 x 10⁻³
=> 1.3 x 10⁻⁴·x + x² = 1.87 x 10⁻³
=> x² + 1.3 x 10⁻⁴·x + 1.87 x 10⁻³ = 0
=> x = -b ± [Sqrt(b² - 4ac)] / 2a
=> x = -1.3 x 10⁻⁴ ± Sqrt[(1.3 x 10² - 4(1)(1.87 x 10⁻³)] / 2(1)
=> x = 0.0432M in PH₃ at equilibrium
Check:
Kc = [BCl₃(g)][PH₃(g)] = (1.3 x 10⁻⁴ + 0.0432)(0.0432) = 1.87 x 10⁻³ (QED)
What is Scientific definition of a compound?
Please match word and definition < electrons and electric current move easily 1. electric current < Prevents electrons from moving 2. insulator flow of an electrical charge in a circuit 3. electric circuit 4. conductor provides a path for electrons to flow
Answer:
1st box:4
2nd box:2
3rd box:3
4th box:1
Explanation:
I am not 100% sure on this, but i am pretty confident that this is the answer! BUT If this is somehow wrong, please tell me so i can comment a better answer! :)
Due to property of conduction, conductor allows electrons and electric current to move easily,insulators prevent electric current from moving, electric current is the flow of an electrical charge in a circuit and electric circuit provides a path for electrons to flow.
What is conduction?Conduction is defined as a process as a means of which heat is transferred from the hotter end of the body to it's cooler end.Heat flows spontaneously from a body which is hot to a body which is cold.
In the process of conduction,heat flow is within the body and through itself.In solids the conduction of heat is due to the vibrations and collisions of molecules while in liquids and gases it is due to the random motion of the molecules .
When conduction takes place, heat is usually transferred from one molecule to another as they are in direct contact with each other.There are 2 types of conduction:1) steady state conduction 2) transient conduction.According to the type of energy conduction is of three types:
1) heat conduction
2) electrical conduction
3)sound conduction
Learn more about conduction,here:
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