Answer:
Chlorine molecules are composed of two atoms (Cl2).
There are four atoms in two molecules of chlorine as each molecule of chlorine is made up of two atoms.
What is an atom?An atom is defined as the smallest unit of matter which forms an element. Every form of matter whether solid,liquid , gas consists of atoms . Each atom has a nucleus which is composed of protons and neutrons and shells in which the electrons revolve.
The protons are positively charged and neutrons are neutral and hence the nucleus is positively charged. The electrons which revolve around the nucleus are negatively charged and hence the atom as a whole is neutral and stable due to presence of oppositely charged particles.
Atoms of the same element are similar as they have number of sub- atomic particles which on combination do not alter the chemical properties of the substances.
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What is the frequency of light with a wavelength of 450 nm?
Answer:
The frequency of blue light that has a wavelength of 450 nm is 6.7×1014 6.7 × 10 14 Hz.
Explanation:
BRAINLIEST?
What is a substrate.
Answer:
A substrate is a molecule acted upon by an enzyme. A substrate is placed into the active site of the enzyme, or the area that permits weak bonds to be formed between the two molecules
Explanation:
Hope it helps:)
If water turns deep red with a few drops of potassium thiocyanate, what cation is likely present?.
Answer:
Fe3^+
[tex]fe3 ^{ + } [/tex]
Which is an example of a physical change?
A) Mixing blue and yellow paint to create green paint
B) Adding water and yeast to bread dough in order to make it raise.
C) Mixing two liquids together in a test tube and the tube becoming warm.
D) Adding a piece of chalk containing calcium carbonate to a glass of mild acid causing the information of a foam of bubbles.
¿Qué fase de la materia se muestra en la imagen? *
solido
Explanation:
porque estan todos los puntos juntos
a hot air balloon is an example of what type of system ? an open system ? a closed system ? or a isolated system ?
Answer:
Also, hot air balloons are open systems—not closed, but again, the use of helium necessitates that the balloon be closed.
Explanation:
Answer:
open system
Explanation:
Find the volume v of the solid obtained by rotating the region bounded by the given curves about the specified line. Y = 8x3, y = 0, x = 1; about x = 2.
The volume v of the solid obtained is 15.08
By using the cylindrical shell method to find the volume v of the solid which can be expressed by the formula;
V = 2πrh drThen, it is paramount to determine the radius and height of the shell.
From the given information;
The cylindrical shell formed by the rotation about the line x = 2Let consider the radius to be 2 - xThe circumference = 2π(2 - x)The height = 8x³Then, the volume v of the solid can be estimated by using the cylindrical shell method as follows;
[tex]\mathbf{V = \int ^1_0 2 \pi (2-x) (8x^3) \ dx}[/tex]
Open brackets;
[tex]\mathbf{V = 2 \pi \int ^1_0 (16x^3 -8x^4) \ dx}[/tex]
Taking the integral form;
[tex]\mathbf{V = 2 \pi \Big [ \dfrac{16x^4}{4}-\dfrac{8x^5}{5} \Big]^1_0}[/tex]
Solving the terms in the bracket
[tex]\mathbf{V = 2 \pi \Big [ \dfrac{16(1)^4}{4}-\dfrac{8(1)^5}{5} -0\Big]}[/tex]
[tex]\mathbf{V = 2 \pi \Big [ 4-\dfrac{8}{5} \Big]}[/tex]
[tex]\mathbf{V = 2 \pi \Big [ \dfrac{20-8}{5} \Big]}[/tex]
[tex]\mathbf{V = 2 \pi \Big [ \dfrac{12}{5} \Big]}[/tex]
[tex]\mathbf{V = \dfrac{24\pi}{5}}[/tex]
[tex]\mathbf{V =15.08}[/tex]
Therefore, we can conclude that the volume v of the solid obtained is 15.08
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PLEASE HELP ME ASAAAAPPPPPPPPPPPPPP!!!!!!!!!!!!!!!!!!!!!!!
Balance the chemical equation using the algebraic method.
C4H10+O2=CO2+H2O
SHOW YOUR WORK PLEASEEEEEEEEE
Electrons are shared. Is it Ionic bond, covalent bond or both?
Answer:
covalent bond
Explanation:
ionic bond is when electrons are transferred by atoms not shared
What is the molarity of an ethanol solution containing 10.0g of ethanol in
water with a total volume of 100ml?
Answer:
2.17 moldm-3
Explanation:
Molarity is the number of moles of solute in a unit volume.
The atomic masses of
C -12
H-1
O-16
Therefore molar mass ( mass of 1 mol ) of ethanol ( CH3CH2OH )
( 12 x 2 ) + (1 x 6) + 16 = 46 g/mol
In 10 g of ethanol 10/46 mol should be present
So the molarity is (10/46) mol ÷ 100ml
= 10/ 46 mol ÷ 0.1 l
1L = 1 dm3
Therefore molarity = 10/46 mol ÷ 0.1 dm3
= 2.17 mol/dm3
how many repeat units are required to make a nylon polymer with a formula weight of 15,000 amu?
This problem is giving information about a nylon polymer whose molar mass is 15,000 amu (atomic mass units).
The first subject of matter here, is to recall the monomeric molecular formula of nylon which is C₁₂H₂₂N₂O₂, and the definition of monomer (basic molecule able to react and form a polymer) and polymer (assembling of monomers).
Next, we calculate the molar mass of the monomer of nylon:
[tex]12*12.01+22*1.01+2*14.01+2*16.00=226.31amu[/tex]
Finally, the number of units is calculated by dividing the molar mass of the polymer and the monomers:
[tex]n=\frac{15000}{226.31} =66.2[/tex]
Which is about 66 monomers.
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https://brainly.com/question/21230841https://brainly.com/question/15160603Answer:
66 monomers
Explanation:
list of charge of elements that do not form compound easily
Answer:
The highlighted words in the explanation.
Explanation:
A clue comes by considering the noble gas elements, the rightmost column of the periodic table. These elements—helium, neon, argon, krypton, xenon, and radon—do not form compounds very easily, which suggests that they are especially stable as lone atoms. What else do the noble gas elements have in common?
(ill give brainliest)
Use this picture to explain that an electrically charged object can attract an uncharged object without any contact. Your answer should be at least three sentences long.
Answer:
It is because the object that is charged attracts the uncharged because it is giving electrons and passing it on to the object. As shown in the image the balloon is attracting the paper that is not charged. Actually telling,the charged object will cause the uncharged object to become charged, with a positive charge on one side and a negative charge on the other side. This process is called induction.
Explanation: Pls Mark Brainliest
Answer:
Positive and negative charges
Explanation:
When we put a charged object near an uncharged object, it produces opposite charges in the near end of the uncharged object by electric induction. In the figure, we can see that the ballon has charges which produces opposite charges in the paper which is uncharged.
26 Milkweed contains a poison known as cardenolides. Monarch butterflies eat the milkweed plant and hold on to this toxic compound. The
chemical formula for cardenolides is shown below.
CH18C20H15CHCO2
Problem
How many atoms of each element are in one molecule of cardenolides?
A
42 carbon atoms, 23 hydrogen atoms, and 2 oxygen atoms
B
20 carbon atoms, 33 hydrogen atoms, and 2 oxygen atoms
с
34 carbon atoms, 43 hydrogen atoms, and 2 oxygen atoms
D
23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms
please help ASAP !!
Cardenolides, with the chemical formula CH₁₈C₂₀H₁₅CHCO₂ have (D) 23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms.
Milkweed contains a poison known as cardenolides. The chemical formula for cardenolides CH₁₈C₂₀H₁₅CHCO₂.
The subscripts in the formula represent the atomicities, that is the number of atoms of each element in each part of the formula.
We can calculate the total number of atoms of each element by adding its atomicities.
Carbon atoms[tex]C = 1 + 20 + 1 + 1 = 23[/tex]
Hydrogen atoms[tex]H = 18 + 15 + 1 = 34[/tex]
Oxygen atoms[tex]O = 2[/tex]
Cardenolides, with the chemical formula CH₁₈C₂₀H₁₅CHCO₂ have (D) 23 carbon atoms, 34 hydrogen atoms, and 2 oxygen atoms
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5) When rain falls to the earth, it just doesn't sit there. Instead, the rain water starts moving. Some of the precipitation seeps into the ground to replenishing groundwater. However, most of
it flows downhill as runoff. Runoff is important in filling rivers and lakes, but it also changes the landscape by erosion and can be a powerful mover. Flowing water is a powerful force,
capable of moving boulders and carving out canyons. Runoff has an impact on streams and rivers, but it also has an impact on the ocean system. What can you infer about the impact of
runoff on Ocean life? Choose ALL that apply.
A) Runoff drops a lot of sediment in the ocean, decreasing salinity.
B) Runoff builds up the coastline, depositing sediment, disrupting habitats of marine wildlife.
Runoff can lead to overgrowth of algae that can cause oxygen deprivation and create a dead zone.
D) Runoff carries pollutants into the ocean, causing illness and death of vulnerable marine populations.
) Runoff can carry bacteria, viruses and other pathogens from pet and livestock waste that can harm shellfish and other marine organisms.
Answer: Rain evaporates and this same process happens over and over again.
Explanation:
Valence electrons are electrons in the ? of an atom.
Answer:
Valence electrons are the outermost of electrons.
Explanation:
valence electrons are the outermost electrons of an atom located in the shell/ orbit
an atom of ordinary hydrogen consists of an electron and a
Answer: hydrogen atom is an atom of the chemical element hydrogen. The electrically neutral atom contains a single positively charged proton and a single negatively charged electron bound to the nucleus by the Coulomb force.
Explanation:
An atom of ordinary hydrogen consists of one electron and one proton and zero neutrons.
What is a hydrogen atom?Hydrogen is a chemical element placed at the top of group 1 in the periodic table and is represented by the chemical symbol H and atomic number 1.
A hydrogen atom is the lightest atom of the element in the whole periodic table. Hydrogen exists as a gas of diatomic molecules having the formula H₂ at standard conditions. Hydrogen gas is tasteless, colorless, odorless, non-toxic, and highly combustible.
Hydrogen is constituting roughly 75% of all normal matter and is the most abundant chemical substance in the universe. Most of the hydrogen element on Earth exists in forms like water and organic compounds. Each atom of hydrogen (¹H) has one proton, one electron, and no neutrons.
Hydrogen element is nonmetallic and easily forms a single covalent bond with most nonmetallic elements, forming compounds like water.
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Chemical properties of water and oxygen for class 8
What is oxidation state?
Answer:
a number assigned to an element in chemical combination which represents the number of electrons lost (or gained, if the number is negative), by an atom of that element in the compound
Explanation:
sodium, magnesium, iron is zero.
The definition of oxidation state is as follows: Oxidation state is a number given to the atom of an element when participating in a chemical reaction.
OXIDATION STATE:The atoms of elements are not always neutral i.e. carry no charge. They sometimes carry either positive or negative charges to become ions. Ions can either be cations (positively charged) or anions (negatively charged). The amount of charges are represented by numbers placed as a superscript in front of the element involved. These superscript charge assigned to a corresponding element during a chemical reaction is called oxidation state. The oxidation state of an element portrays the number of electrons gained or lost during the reaction.Therefore, oxidation state can be defined as a number given to the atom of an element when participating in a chemical reaction.
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True or false: For a spontaneous redox reaction, the products are stronger oxidizing and reducing agents than the reactants.
Answer: False
Explanation: The stronger oxidizing agent, and stronger reducing agent are the reactants.
The given statement is false , for a spontaneous redox reaction, the reactants are stronger oxidizing and reducing agents than the products.
What are redox reactions?Redox reactions comprise of two parts a reduced part and an oxidized part, which occur simultaneously . The part which is reduced gain electrons and hence there is a increase in oxidation state of the species.
While, the part which is oxidized looses electrons and hence there is a decrease in oxidation state of the species.During redox reactions, there is no net change in the number of electrons . Electrons which are given off in oxidation are used up in reduction.
The ion or molecule which accepts electrons is called as oxidizing agent while the ion or molecule which donates electrons is called as a reducing agent.
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For SCl4, the electron domain geometry is _______(i)________ and the molecular geometry is ______(ii)________.
The electron domain geometry is trigonal bipyramidal while the molecular geometry of the compound is seesaw.
The shapes of molecules is determined by the number of electron pairs on the valence shell of the central atom in the molecule. These electron domains include lone pairs and bond pairs.
The lone pairs only contribute towards the electron domain geometry and not the molecular geometry. SCl4 has five electron domains hence its electron domain geometry is trigonal bipyramidal. The molecular geometry of the compound is seesaw.
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-Rutherford's experiment was important because it showed that:
A) Radioactive elements give off alpha particles.
b) A zinc sulfide screen glows when struck by a charged particle.
C) The mass of the atom is uniformly distributed throughout the atom
d) An atom is mostly empty space
Answer: D
Explanation:
How many significant figures are in 0.005439
Answer:
Number of Significant Figures: 4
The Significant Figures are 5 4 3 9
Explanation:
Which one is better!!!!!!!!!????????
Answer:
Both Iron Man and Spider-Man are quite powerful in the comic books, but we think that Spider-Man would be able to defeat Iron Man. Despite his powers, Iron Man is still just a man in a suit, while Spider-Man has actual superpowers and we think they could easily cancel all of Iron Man's advantages
Explanation:
Correct measurement for solubility
Answer:
g/100g
Explanation:
grams per 100 g of solvent or short term g/100g
Answer:
grams of solute per milliliters of solution
Explanation:
ur welcome
When a gas changes into a liquid, what is this process called?
sublimation
freezing
condensation
vaporization
Answer:
condensation
Explanation:
going from gas to luquid
Answer:
condensation your welcome :)
Explanation:
wow 50 points for this??? TYSM!!!
18. Consider the information about carbon provided in Model 4.
a. Are diamonds and graphite made from the same element?
Answer:
yes
Explanation:
help me please the subject is siecnce
Answer:
okay your question in science
If the forces are balanced...
The net force is greater than zero
The net force is zero
The net force is less than zero
Answer:
the net force us 0.............
Explanation:
please mark brain
One of the following is not a property of metals
O a
high malleability
Oь
high compressibility
Os high melting point
Od
high ductility
Answer:
O b
Explanation:
high compressibility is not the property of metal.