Answer:
B. Identify solutions to the problem.
Explanation:
In the case described above, the engineer has already designed and attempted to manufacture a prototype for the process. The design of the process must have also been carefully researched and planed.
However, he identified the problem of low yield and is now working towards identifying solutions to the problem. One option he seeks to explore according to the question is to change the catalyst used in the reaction.
Hi does anyone know?
Periodic table related question
Answer:
noble gases are in fact F
Which of the following is most likely caused by chemical weathering?*
A rock formation forms in the desert.
A V-shaped valley is formed in the mountains.
The dunes on the beach become larger over time.
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The color on The Statue of Liberty has changed over time
Soil erosion can increase when humans remove trees and other
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DELL
What of the following is characteristic of a metallic bond?
A. Electrons move freely among many metal nuclei.
B. Electrons are shared between two metal nuclei.
C. Electrons are transferred from one metal to another.
D. Electrons are attracted to a metal on another molecule.
Answer:
The correct answer is A) Electrons move freely among many metal nuclei
Explanation:
I just did it
Among all the given options, the correct option is option A which involve metallic bonding that is electrons move freely among many metal nuclei.
What is metallic bond?All elements strive to have eight electrons within their valence shell, which is their outermost electron shell. Atoms of all elements attempt to link with the other compatible atoms in order to get eight electrons for their valence shell. They either share electrons or donate electrons to create bonds.
Simple metals such sodium, which contribute an electron and receive a positive charge, then combine with other elements like chlorine, which receive an electron and receive a negative charge, to form compounds. Ionic bonds are this type of bond. Atoms such hydrogen and oxygen will occasionally share electrons to complete their valence shells.
Therefore, the correct option is option A.
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Calculate the eccentricity of an ellipse. The distance between the foci is 5.2 and the length of the major axis is 20.6.Round off your answer to the nearest thousandths (0.000).
Answer:
The eccentricity of the ellipse is 0.252.
Explanation:
The eccentricity of an ellipse ([tex]c[/tex]), dimensionless, can be determined by means of the following expression:
[tex]e = \frac{\bar c}{\bar a}[/tex] (1)
Where:
[tex]\bar c[/tex] - Distance between the foci, dimensionless.
[tex]\bar a[/tex] - Length of the major axis, dimensionless.
If we know that [tex]\bar c = 5.2[/tex] and [tex]\bar a = 20.6[/tex], then the eccentricity of the ellipse is:
[tex]e = \frac{5.2}{20.6}[/tex]
[tex]e = 0.252[/tex]
The eccentricity of the ellipse is 0.252.
Which substances will make a salt when combined?
Group of answer choices
Vinegar and tea
Soda and wine
Soda and ammonia
Fertilizer and detergent
artificial selection is a way that people____evolution
A(speed up)
B(start)
c(stop)
D(slow down)
Answer:
A - speed up
Explanation:
Artificial selection, also called "selective breeding”, is where humans select for desirable traits in agricultural products or animals, rather than leaving the species to evolve and change gradually without human interference, like in natural selection.
Please help!! Why is the following Electron Configuration incorrect for Aluminium?
Answer:
3s^1 would be 3s^2
Explanation:
Will give branliest Are the answers i put in this table correct
The ones in yellow are the ones I'm most confused about
(NH₄)₂S
(NH₄)₃P
(NH₄)₃N
CuS
Cu₃P₂
Cu₃N₂
Further explanation:For ionic compounds consisting of cations (ions +) and anions (ions -)
The naming is preceded by the cation then the anion with the -ide suffix added
Generally for this ion compound consists of metal elements as cations and non-metals as anions
Metal: cation, positively charged.
Nonmetal: negative anion.
The anion cation's charge is crossed
Cation : NH₄⁺, Anion : S²⁻⇒ Compound : (NH₄)₂S
Cation : NH₄⁺, Anion : P³⁻⇒ Compound : (NH₄)₃P
Cation : NH₄⁺, Anion : N³⁻⇒ Compound : (NH₄)₃N
Cation : Cu²⁺, Anion : S²⁻⇒ Compound : CuS
Cation : Cu²⁺, Anion : P³⁻⇒ Compound : Cu₃P₂
Cation : Cu²⁺, Anion : N³⁻⇒ Compound : Cu₃N₂
Water is a polar molecule. What does that mean?
A. It is a molecule with too many protons
B. it is a molecule with identical charges on opposite ends
C. it is a molecule with no charge
D. it is a molecule with opposite charges on opposite ends
James was standing on a boat in deep ocean water. He wanted to see how long it would take a tennis ball to reach the shore if he threw one in from the boat. Why wouldn't this plan work?
Answer:
only the wave energy of the water moves
Explanation:
The plan will not work due to the fact that only the wave energy of the water moves and not the water itself.
The wave motion of water does not displace the water. It is only able to transfer energy from one point to another within the medium. Hence, the ball will hardly be displaced because the water itself does not move. However, it can get to the shore with the assistance of the water current.
Which of the following is a characteristic of a weak acid?
O A. It is not as dangerous as a strong acid.
O B. It is less concentrated than a strong acid.
C. It does not dissociate completely in water.
D. It does not conduct electricity in water.
Answer:
A,B,C,D
Explanation:
all of the above : )
if you had to go with a certain answer go with C im most sure of
A weak acid will not completely dissociate in water due to strong forces
How many atoms of carbon are in 6.00g of carbon?(Mm of carbon is
12g/mol)
3.01 × 10²³ atoms C
General Formulas and Concepts:Chemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to Right Explanation:Step 1: Define
6.00 g C
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of C - 12.01 g/mol
Step 3: Convert
[tex]6.00 \ g \ C(\frac{1 \ mol \ C}{12.01 \ g \ C} )(\frac{6.022 \cdot 10^{23} \ atoms \ C}{1 \ mol \ C} )[/tex] = 3.00849 × 10²³ atoms C
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
3.00849 × 10²³ atoms C ≈ 3.01 × 10²³ atoms C
Which part of the atom is involved in bonding?
O A All electrons
O B. Valence electrons
O C. Protons
O D. lons
Answer:
The part of the atom that is involved in bonding is Valence electrons.
why was it so important that the electron was smaller than the atom?
Answer:
because electron is a negetively charge particle that orbits the outer part of atom and despite being small it is a strong proton.
Explanation:
An aqueous solution has a hydrogen ion contamination of 1.15x10^-2M (1)What is the hydroxide ion concentration in this solution? (2)What is the pOH of this solution? (3)What is the pH of this solution?
Answer:
See explanation
Explanation:
We know that
pH = - log [H^+]
but [H^+] = 1.15x10^-2M
Hence;
pH = - log(1.15x10^-2)
pH = 1.94
And;
pH + pOH = 14
pOH = 14-pH
pOH = 14 - 1.94
pOH = 12.06
Since;
pOH = - log [OH^-]
hence;
[OH^-] = Antilog (-pOH)
[OH^-] = Antilog (12.06)
[OH^-] = 8.7 * 10^-13 M
PLS HELP! What are examples of a chemical reaction?
Select all that apply.
a. O2(g) + O(g) → O3(g)
b. 2H2O(l) → 2H2(g) + O2(g)
c. CH4(g) + 2O2(g) → CO2(g) + 2H2O(g)
d. CO2(s) → CO2(g)
Answer:
a , b , c are chemical equations
What is the difference between speed and velocity?
(a) magnitude
(b) direction
(c) nothing
Answer:
(B) direction
Explanation: Speed is the time rate at which an object is moving along a path, while velocity is the rate and direction of an object's movement.
The ink of some permanent markers is soluble in alcohol but not in water.Can water be used to remove stains from these permanent markers?If not what can be used to remove them.
Answer:
See the answer below
Explanation:
No, water cannot be used to remove stains from the permanent makers. However, alcohol can be used.
Since the inks of permanent markers are insoluble in water, trying to clean a stain created by a permanent marker with water would be a waste of effort. Only alcohols can be used to successfully remove the stain because the inks will dissolve in the alcohols.
Name the type of bonds that exist between the atoms in silicon(IV) oxide,
Answer:
All the atoms in its structure are linked to each other by strong covalent bonds. The atoms are joined to each other in a regular arrangement, forming a giant covalent structure. There is no set number of atoms joined together in this type of structure.
Explanation:
All the atoms present in silicon(IV) oxide are linked together by covalent bonds as there is slight difference in electronegativity of silicon and oxygen atoms.
What is a covalent bond?
Covalent bond is defined as a type of bond which is formed by the mutual sharing of electrons to form electron pairs between the two atoms.These electron pairs are called as bonding pairs or shared pair of electrons.
Due to the sharing of valence electrons , the atoms are able to achieve a stable electronic configuration . Covalent bonding involves many types of interactions like σ bonding,π bonding ,metal-to-metal bonding ,etc.
Sigma bonds are the strongest covalent bonds while the pi bonds are weaker covalent bonds .Covalent bonds are affected by electronegativities of the atoms present in the molecules.Compounds having covalent bonds have lower melting points as compared to those with ionic bonds.
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gamma rays have an approximate wavelength of 1.0x10^-13 meters. what is the approximate energy of a gamma-ray?
Answer:
E = 19.89 × 10⁻¹³ J
Explanation:
Given data:
Wavelength of gamma ray= 1.0× 10⁻¹³ m
Energy of gamma ray = ?
Solution:
Formula:
E = h c/λ
h = plancks constant = 6.63× 10⁻³⁴ js
c = speed of light = 3 ×10⁸ m/s
by putting values,
E = 6.63× 10⁻³⁴ js × 3 ×10⁸ m/s /1.0× 10⁻¹³ m
E = 19.89 × 10⁻²⁶ J.m/ 1.0× 10⁻¹³ m
E = 19.89 × 10⁻¹³ J
Precipitation formed when rain is repeatedly blown back up into the cloud and freezes in layers
A. Circulation
B. Precipitation
C. Sleet
D. Hail
Answer:
c
Explanation:
cause
Answer:
Hail
Explanation:
help please be the right answer
Answer:
it is the first one :)
Explanation:
im almost 70 percent sure its the first one, because you can describe motion with all of these. good luck !
When the frequency of a wave increases, what happens to the wavelength?
It increases
It disappears
It does not change
It decreases
Answer:
It decreases.
Explanation:
I just took the test.
What would happen to a persons energy levels if the septum had a hole in it? Why?
why we need to eat and the difference in heterotrophs and autotrophs?
In your own words
Answer:
Just a thing I need my brainliest!!
Explanation:
Also refered to as consumers, heterotrophs areorganisms that obtain their energy (nutrition) from organic compounds/materials.In other words, they are organisms that are unable to produce their ownfood (unlike autotrophs) and therefore have to consume/ingest organic compoundsas a source of energy. Compared to autotrophs (which occupy the base of thefood-web triangle), heterotrophs occupy the upper levels of the food web giventhat their survival is dependent on the producers
A gas has an initial volume and pressure of 3 m3 and 5 atm. Keeping the temperature constant, what will its volume be at a pressure of 15 atm?
PLEASE HELP THIS IS DUE TODAY!!!!!!!!!
______________ are low energy waves found in the electromagnetic spectrum and ______________ are high energy waves found in the electromagnetic spectrum. (2 points)
Select one:
a. Gamma rays; radio waves
b. Microwaves; X–rays
c. Visible light; microwaves
d. Ultraviolet rays; radio waves
Answer:
Microwaves and X-rays
Explanation:
Water sticks well to many different materials. What term relates to this property of water?
A. adhesion
B. cohesion
C. density
D. surface tension
Answer:
A. Adhesion
Explanation:
The prefix ad- means "to, toward". Most terms like that describe something connect to another.
Answer:
B. Cohesion
Explanation:
A water drop is composed of water molecules that like to stick together-an example of the property of cohesion
a metallic object with atoms in a face-centered cubic unit cell with an edge length of 392 pm has a density of 21.45 g/cm^3. calculate the atomic mass and radius of the metal. identify the metal.
The metal = Platinum(Pt)
Further explanationFCC : Face centered cubic : the unit structures of the unit cell((other than BCC, HCP)
In FCC ⇒ atoms on every corner and side (total 4 atoms)
The length of the face diagonal (b) = 4 times the atomic radius (r)
Formula :
[tex]\tt b=4r[/tex]
[tex]\tt a=r\sqrt{8}[/tex]
[tex]\tt V=16r\sqrt{2}=a^3[/tex]
[tex]\tt \rho=\dfrac{n.Ar}{V.No}[/tex]
Ar = atomic mass, g/mol
No = Avogadro number = 6.02.10²³
n = number of atoms
V = volume (cm³)
a = side length
b = diagonal of the side surface
r = atomic radius
a= 392 pm=3.92 x 10⁻⁸ cm
ρ = 21.45 g/cm³
[tex]\tt V=a^3\\\\V=(3.92\times 10^{-8})^3\\\\V=6.024\times 10^{-23}~cm^3[/tex]
The atomic mass :
[tex]\tt 21.45~g/cm^3=\dfrac{4\times Ar}{6.024\times 10^{-23}\times 6.02\times 10^{23}}\\\\Ar=194.47\approx 195~g/mol[/tex]
radius :
[tex]\tt a=r\sqrt{8}\\\\3.92\times 10^{-8}=r\sqrt{8}\\\\r=1.386\times 10^{-8}~cm[/tex]
Element with atomic mass 195 g/mol and radius = 139 pm (1.386x10⁻⁸cm) = Platinum(Pt)
what is the orbital configuration of the aluminum (Al) Atom
The orbital configuration of the Aluminum is 1s²2s²2p⁶3s²3p¹.
What is an electronic configuration?The electron configuration can be explained as that how electrons are placed in different energy levels of an atom of an element. In the electron configuration, the number of electrons should be written as a superscript of electron atomic subshells. For example, the electron configuration of the Neon element is written as 1s²2s²2p⁶.
The principal quantum number (n) can determine the maximum number of electrons that can be filled in a particular electron shell. It is given by the formula 2n², where ‘n’ is principal quantum number.
The atomic orbitals of at energy must be fully filled before occupying an orbital at higher energy. The energy of the orbitals for the Al atom will be as 1s < 2s < 2p < 3s < 3p.
The atomic number of the Aluminum (Al) is 13 and the electronic configuration of aluminum is 1s²2s²2p⁶3s²3p¹.
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