Answer:
Kelvin Scale
Explanation:
As in Kelvin scale 0 is absolute zero temprature and in celcius scale it calculates -273.15 'Celcius
The Temperature scale has zero as its lowest temperature is The Kelvin Scale Hence , Option (C) is correct.
What is Kelvin Scale ?
The kelvin, symbol K, is the SI base unit of temperature, named after the Belfast-born and University of Glasgow based engineer and physicist William Thomson, 1st Baron Kelvin.
The Kelvin scale is an absolute thermodynamic temperature scale, meaning it uses absolute zero as its null point.
Therefore , The Temperature scale has zero as its lowest temperature is The Kelvin Scale Hence , Option (C) is correct.
Learn more about Thermodynamics here ;
https://brainly.com/question/1604031
#SPJ2
39. Which of the following substances are insoluble in water? Select all that apply.
A)Li2CO3
B)BaSO4
C)Mg3(PO4)2
D)КОН
Answer:
B) BaSO₄ and C) Mg₃(PO₄)₂
Explanation:
We can use the solubility rules to decide which substances are insoluble.
You have probably learned NAG SAG and "Cats Cradle Old People," Sally Said.
I've listed them below.
[tex]\begin{array}{lll}\textbf{Soluble} & \textbf{Insoluble}\\\textbf{N}\text{itrates} &\textbf{C} \text{arbonates }\\ \textbf{A}\text{cetates} & \textbf{C}\text{hromates}\\ \textbf{G}\text{roup 1} & \textbf{O}\text{ hydrOxides}\\ & \textbf{P} \text{hosphates}\\\textbf{S}\text{ulfates} &\textbf{S} \text{ulfites}\\ \textbf{A}\text{mmonium}& \textbf{S}\text{ulfides}\\\textbf{G}\text{roup 17} & \\\end{array}[/tex]
These aids help you remember that:
The salts of Group 1 metals are soluble (Li₂CO₃ and KOH).
Sulfates are usually soluble, except for BaSO₄. Thus, BaSO₄ is insoluble.
Phosphates are insoluble — Mg₃(PO₄)₂
The two insoluble compounds are BaSO₄ and Mg₃(PO₄)₂.
What type of energy is the sum of an object’s potential and kinetic energy? -mechanical energy -electromagnetic energy -chemical energy -thermal energy
Answer:
A on EDG 2020
Explanation:
Got it right :)
The energy is the sum of an object’s potential and kinetic energy is mechanical energy. Therefore, option A is correct.
What is mechanical energy ?The term mechanical energy is defined as the sum of an object's potential energy and kinetic energies. As an object falls down its potential energy will be decreases, while its kinetic energy will be increases.
Whenever potential energy and kinetic energy are combined, they formed total mechanical energy. Mechanical energy is the energy that an object has due to its motion and due to its position. Energy of motion is called as kinetic energy, and energy of position or shape is called as potential energy.
Thus, Mechanical energy is the sum of an object's kinetic energy and potential energy, option A is correct.
To learn more about the mechanical energy, follow the link;
https://brainly.com/question/29408366
#SPJ6
What determines an element's emission spectrum?
O A. The size of the sample
O B. The mass of the nucleus
O C. The electron energy levels
O D. The number of protons
An elements's emission spectrum determines the electron energy levels and the correct option is option C.
An element's emission spectrum is determined by the specific energy levels of its electrons. When an electron in an atom transitions from a higher energy level to a lower energy level, it releases energy in the form of electromagnetic radiation.
The wavelength and frequency of this emitted light correspond to specific energy differences between the electron energy levels. Each element has a unique arrangement of electron energy levels, leading to a distinct emission spectrum.
By analyzing the emitted light, scientists can identify the element and gain insights into its atomic structure. The size of the sample, mass of the nucleus, and number of protons do not directly determine an element's emission spectrum.
Thus, the ideal selection is option C.
Learn more about Emission spectrum, here:
https://brainly.com/question/31086638
#SPJ6
Dogs can have different coloured coats, this is known v________
Answer:
Genes Rule
Explanation:
The color of a dog's coat is basically at the mercy of his gene pool. Genes do two things that determine a dog's appearance. They control the pigments produced (eumelanin and phaeomelanin) and where these pigments are produced.
What are the units of molality? A. mol/kg B. g/mol C. mol/L D. kg/mol
Answer:
A. mol/kg
Explanation:
hope it helps .
What forces hold network solids together?
A. Hydrogen bonds
O B. Covalent bonds
O C. Metallic bonds
D. Ionic bonds
Consider the reaction below.
Answer:
B.
Explanation:
Oxidation - losing electrons. It is Zn, and it is losing 2 electrons.
[tex]Zn^{0} --> Zn^{2+} +2e^{-}[/tex]
Energy is involved in some way in all chemical reactions. Which type of reaction involves the absorption of energy from the surroundings? Options: exothermic reactions endothermic reactions
Answer:
endothermic reaction
Explantion:
The definition for endothermic is:
describing a process that involves the absorption of energy from the surroundings by substances undergoing change.
Think of en-dothermic as energy entering and ex-othermic as energy exiting.
Answer:
Endothermic
Explanation:
On Edge :)
an ion has a charge of +1 and 15 protons how many electrons does it have?
Answer:
Electron=14
Explanation:
Protons = Electron,
that is why the +1 indicates the affinity of loosing an electron.
Kool-Aid is made up of sugar (C6H12O6), food coloring, and water. It is an example of a(n)
element
heterogeneous mixture
homogeneous mixture
compound
Match the condensed structural diagrams with the correct names
I. CH3-CH2-COOH
II. CH3-CH2-OH
III. CH3-COO-CH2-CH3
IV. CH2OH-CH2-CH3
V. CHOO-CH3
VI. CH3-COOH
46. Ethanol
47. Propyl ethanoate
48. Propan 1-Ol
49. Propanoic acid
50. Ethanoic acid
51. Methyl methanoate
Question related to above)
For each of the waters provided, identify the alcohol and the carboxylic acid that reacted
52. Methyl propanoate (-)+ (-)
53. Ethyl methanoate(-) +(-)
Answer:
Here's what I get
Explanation:
1. Names
I. CH₃-CH₂-COOH = 49. propanoic acid
II. CH₃-CH₂-OH = 46. ethanol
III. CH₃-COO-CH₂-CH₂-CH₃ = 47. propyl ethanoate
IV. H-O-CH₂-CH₂-CH₃ = 48. propan-1-ol
V. H-COO-CH₃ = 51. methyl methanoate
VI. CH₃-COOH = 50. ethanoic acid
2. Precursors
52. methyl propionate ⇒ methanol + propanoic acid
53. ethyl methanoate ⇒ ethanol + methanoic acid
which diagram(s) represents the bonding pattern of metals? a)A and B
b)C and D
c)A
d)C
the other guy is totally wrong. the answer is a for sure. C is showing a covalent bond between 3 atoms. Metals bond differently. Like shown in a and b. However b is innacurate because it shows the electrons being the largest(since they are negatively charged and there is a - sybmol), and we all know protons are much larger than electrons. SO a is correct because it depicts the positive protons(+ symbol) as the biggest. So go with a.
How many grams of KCl will dissolve in 100g H2O at 40°C?
Answer:
5 grams
Explanation:
Which type of molecules is shown below? A. Lipid B. Nucleic acid C. Carbohydrate D. Amino acid
Amino acid is the type of molecule shown in the image.
What is an amino acid?Amino acids are small molecules that are the building blocks of proteins.
Amino acids are the smaller component pieces, called monomers, that are joined together to make the longer strand, or polymer, which is a protein. Amino acids are joined by covalent bonds called peptide bonds to make a polypeptide chain, which eventually creates proteins in our cells. There are 20 different amino acids in our cells that come together in a unique order to create the proteins organisms need.
Hence, an amino acid is the type of molecule shown in the image.
Learn more about amino acids here:
https://brainly.com/question/23875276
#SPJ2
Consider the reaction below.
Answer:
B
Explanation:
Select the correct answer.
Consider an atom that has an electron in an excited state. The electron falls to a lower energy level. What effect does that have on the electron?
ОА
ОВ.
The electron releases energy in the form of light.
The electron absorbs energy in the form of light.
The electron retains its energy without any change.
Ос.
OD
The electron transfers its energy to other electrons.
Reset
Next
Answer:
the electron releases engery in the form of light
Explanation:
it's science i don't know how to explain sorry
Answer:c
Explanation:
Consider the following reversible reaction.
Answer:
B is the correct option
Explanation:
K= the ratio of product of concentration of products to the product of concentration of reactants raised to power equal to their cofficients.
Answer:
aaaaa
Explanation:aaaaaaa
What is a semiconductor? A. A substance that completely blocks the flow of electricity. B. A conductor that conducts electricity faster than common metals. C. A conductor that operates only at low temperatures. D. A conductor that has less conductivity than do metallic conductors.
Answer:
D. A conductor that has less conductivity than do metallic conductors.
Explanation:
hope it helps .
To solve this we must be knowing each and every concept related to semiconductor. Therefore, the correct option is option D among all the given options.
What is semiconductor?A semiconductor is indeed a crystalline solid substance with electrical conductivity intermediate between that of a conductor and that of an insulator. Semiconductors are primarily utilized in the production of electronic devices such as capacitors, semiconductors, diodes, integrated circuits, and so on.
Semiconductors are frequently employed in numerous technologies because to their dependability, interoperability, power efficiency, and low cost. Semiconductors are also employed in the production of batteries, image devices, light emitters, and other electronic devices. Semiconductor is a conductor that has less conductivity than do metallic conductors.
Therefore, the correct option is option D.
To know more about semiconductor, here:
https://brainly.com/question/29850998
#SPJ2
Which statement is true about molarity and percent by mass?
Answer: they are different units of concentration
Explanation:
In the electron configuration for scandium (atomic number 21), what is the
notation for the three highest-energy electrons?
Select one:
O a. 30% 452
O b. 453
O c. 3d3
O d. 452 4p?
Answer:
Explanation:
d. 452 4p
hope it helps
An element is:
A. A compound formed when different atoms react and form bonds with each other.
B. A pure chemical compound consisting of multiple atomic numbers.
C. A pure chemical substance consisting of one type of atom.
D. Two or more compounds that are mixed together but not chemically bonded.
Reset Selection
The world's record for the largest cup of coffee was broken on October 15, 2010 with a 2010 gallon cup of coffee in Las Vegas, Nevada. If a cup of coffee contains 318 mL of coffee, how many cups of coffee would be required to fill the world record coffee cup?
Answer: 23927 cups of coffee would be required to fill the world record coffee cup.
Explanation:
Volume of cup of coffee = 318 ml
Volume of largest cup (world record coffee cup) of coffee = 2010 gallon
Volume of largest cup of coffee in ml = [tex]2010\times 3785.41=7608678ml[/tex] ( 1 gallon = 3785.41 ml)
To find : Number of cups of coffee to fill world record coffee cup = x
Thus as we know :
[tex]{\text {Number of cups of coffee to fill world record coffee cup}}\times {\text {Volume of cup of coffee}}={\text {Volume of largest cup (world record coffee cup) of coffee}}[/tex]
Putting in the values we get:
[tex]x\times 318ml=7608678ml[/tex]
[tex]x=23927[/tex]
Thus 23927 cups of coffee would be required to fill the world record coffee cup.
Question 25:-
A, YA are two isotopes of element A.
Difference between the number of neutrons
in the isotopes is?
Answer : The correct option is, (c) 1
Explanation :
Isotope : It is defined as the element that have the same number of protons but have the different number of neutrons of each of the atom.
Isotope notation : It is also called as nuclear notation. In isotopic notation we can easily determine an isotope's mass number, atomic number, the number of neutrons and protons in the nucleus.
The general isotopic representation of an atom is: [tex]_Z^A\textrm{X}[/tex]
where,
Z = Atomic number of the atom
A = Mass number of the atom
X = Symbol of the atom
As we are given two isotopes:
[tex]^{y}_{x}A[/tex] and [tex]^{y+1}_{x}A[/tex]
From this we conclude that,
The number of neutrons in isotope [tex]^{y}_{x}A[/tex] = y-x
The number of neutrons in isotope [tex]^{y+1}_{x}A[/tex] = (y+1)-x
Difference between the number of neutrons in the isotopes = [(y+1)-x] - [y-x] = 1
Therefore, the difference between the number of neutrons in the isotopes is 1.
Which of the following is a combustion reaction?
O A. CO2 + H2O + H2CO3
O B. CzHg + 502 → 3002 + 4H20
O C. MgSO4 + Ba → BaSO4 + Mg
D. NaOH + HCl → NaCl + H2O
In what order do electrons fill orbitals?
A. The p orbitals full before the s orbitals in an energy level
B. Before pairing 1 electron occupies each s and p orbital
C. Electrons fill orbitals in order of increasing orbital energy
D. Orbitals s,p and then d fill in one energy level before starting the next
Electrons fill orbitals in order of increasing orbital energy. orbital is also known a wave function.
What is orbital ?An atomic orbital is a function that describes the position and wave-like activity of an electron in an atom in terms of both atomic theory and quantum mechanics.
This function may be used to determine the likelihood of discovering any atom's electron in any certain area surrounding the nucleus.
There are four different sorts of orbitals are s, p, d, and f, each named after a sublevel of energy. The energy of the electrons in each sort of orbital determines its particular form.
The form of the s orbital is spherical.There are three p orbitals with different three-dimensional axes of orientation.
Thus, option C is correct.
To learn more about orbital follow the link;
https://brainly.com/question/14649495
#SPJ5
what mass of mass phosphoric acid will be produced if 42.0 grams of water react
Answer:
4 mol H3PO4
Explanation:
8. What is an energy level?
A)The region outside the nucleus where the neutron is likely to be moving.
B)The region outside the nucleus where the electron is likely to be moving.
C)The region outside the nucleus where the proton is likely to be moving.
D)The region inside the nucleus where the electrons are located.
Answer:
B. The region outside a nucleus where the electron is moving
Explanation:
The more the electron moves, the higher energy level it has, the slower the electron moves the lowwer energy level it has.
Answer:
Energy levels (also called electron shells) are fixed distances from the nucleus of an atom where electrons may be found. Electrons are tiny, negatively charged particles in an atom that move around the positive nucleus at the center. Energy levels are a little like the steps of a staircase. You can stand on one step or another but not in between the steps. The same goes for electrons. They can occupy one energy level or another but not the space between energy levels.
:D
what causes the difference genetically identical organisms
Answer:
the epigenetic perspective. ... Such variation among organisms with virtually identical chromosomal DNA sequences has largely been attributed to the effects of environment.Explanation:
Who is correct? Reggie, because baking and melting cause bonds to be broken, leading to a chemical change. Reggie, because objects that are heated always undergo chemical changes. Charlotte, because melting objects only sometimes cause a chemical change. Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Answer: Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation: Baking is a chemical change you cant turn it back to what it was before. Its chemical properties have changed. Melting is a physical change. Its chemical properties are still the same it has not changed. It just changed it's physical form but the object is still the object.
Answer:
Charlotte, because baking causes a chemical change, but melting objects is a non-chemical change.
Explanation:
took the quiz on edge
34. How many hydrogen atoms are in the formula for phosphoric acid?
A)2
B)1
C)4
D)3
Answer:
D)3
Explanation:
Answer:
The answer is D.
Explanation:
Given that the formula for phosphoric acid is H3PO4 so there are 3 Hydrogen, 1 Phosphorus and 4 Oxygen.