Answer:
c. composed of only one type of atom or molecule.
Explanation:
Pure substances are the substances that could be made up of only one type of particles and also it contains fixed structure. They would be further categorized as the elements & compounds. It is an elements that only consist of only one type of atom or molecule
Therefore as per the given situation, the option c is the answer
Answer: correct answer is C
Explanation:
What sort of fossils would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole?
Answer:
Antarctic Peninsula, is one of the most important fossil sites on Earth.
hope this helps you ☺️☺️
Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.
What are fossils?Fossils are the preserved remains, impression, or trace of any once-living thing from many years ago. Examples of the fossils include bones, shells, exoskeletons, stone imprints of animals or microbes, objects preserved in amber, hair, petrified wood and DNA remnants.
There are four different types of fossils-
Mold fossils
Cast fossils
Trace fossils or Ichnofossils
True form fossils
Imprints, tracks, and trails can also become fossilized and are called Trace fossils. Dinosaur footprints or worm burrows are the examples.
Living things when get decomposed from the so many years ago and become dirt and rocks are fossils.
Therefore, Fossils that would be expected to be found in Antarctica from more recent times, after it had moved much closer to the South Pole is Antartica peninsula.
Learn more about Fossils, here:
https://brainly.com/question/14988327
#SPJ3
Question 3 of 20 :
Select the best answer for the question.
3. The atomic number of niobium (Nb) is 41. What's the electron configuration for Nb?
O A. [Ar] 3s 4p?
O B. [Kr] 5s? 5p
O C. [Kr] 4d45s
O D. (Ne) 4d
Answer:
[Kr] 4d4 5s1
Explanation:
Niobium is a chemical element with atomic number 41 which means there are 41 protons and 41 electrons in the atomic structure. The chemical symbol for Niobium is Nb. Neutron Number and Mass Number of Niobium Mass numbers of typical isotopes of Niobium are 93.
Name of Element : Niobium
Atomic Weight : 92.9
Atomic Number : 41
Group : Transition Elements
Electron Configuration: 1s2 2s2 2p6 3s2 3p6 4s2 3d10 4p6 5s2 4d3
The smallest unit which contains all the chemical properties of the substance containing two or more atoms is ? .
Answer:
element has this explanation and is actually the smallest unit with chemical properties
In an aqueous chloride solution cobalt(II) exists in equilibrium with the complex ion CoCl42-. Co2 (aq) is pink and CoCl42-(aq) is blue. At Low Temperature the pink color pre-dominates. At High Temperature the blue color is strong. If we represent the equilibrium as:
CoCl4^2-(aq) <--> Co2+(aq) + 4Cl-(aq)
We can conclude that:___.
1. This reaction is:___.
A. Exothermic
B. Endothermic
C. Neutral
2. When the temperature is decreased the equilibrium constant, K:____.
A. Increases
B. Decreases
C. Remains the same.
3. When the temperature is decreased the equilibrium concentration of Co2:______.
A. Increases
B. Decreases
C. Remains the same.
Answer:
1. This reaction is (A) Exothermic .
2. When the temperature is decreased the equilibrium constant, K: (A) Increases
3.When the temperature is decreased the equilibrium concentration of Co2: (A) Increases
Explanation:
[tex]CoCl4^2-(aq) <--> Co_2+(aq) + 4Cl^-(aq)[/tex]
1. The pink color predominates at low temperatures, indicating that the commodity is preferred.
This is a reaction that is exothermic.
2. As the decrease in the temperature , the equilibrium constant , K ;
equilibrium constant = [tex]\frac{product}{reactant}[/tex] =[tex]\frac{[CO^2^+][Cl^-^4]}{CoCl^2^-_4}[/tex]
As the temperature drops, the concentration of[tex]Cl^-[/tex] and [tex]CO^2^+[/tex] rises, and K rises as well , thus it increases .
3. The equilibrium concentration of [tex]CO^2^+[/tex] decreases as the temperature decreases:
When the temperature is lowered, the equilibrium shifts to the right , that is it increases.
Why do scientists track virus mutations and how might tracking these variants be helpful in preventing and treating the virus?
Answer: they do this because if they do they can easily find new viruses to stay safe from
Explanation: i took test on it recentley
I’m confused and I don’t understand this can someone help?
Answer:
50%
Explanation:
This is a simple one trait Punnett square.
Because we know that the recessive trait is blue (yy) thanks to the text mentioning SpongeSusie being blue and recessive. Spongebob is yellow with a genotype of Yy or heterozygous. So we need two y to make a blue baby.
Yy X yy = 50% yellow Yy and 50% blue yy
In the 1990s scientists were studying the comet named Shoemaker-Levy. Write a short report about this comet.
Answer:
Please find the report on the comet below
Explanation:
Specifically in the year 1993, a comet was discovered by three individuals namely: Eugene Shoemaker, Carolyn Shoemaker, and David Levy. The comet was named after the first discoverers as; Shoemaker-Levy 9.
Shoemaker-Levy 9 was reported to have already been in pieces as at the time of discovery. It was believed to have been torn apart by the gravitational force emanating from the biggest of the planets called JUPITER.
In July 1994, Shoemaker-Levy 9 came in contact with Jupiter in what seemed to be the end of the discovered comet. This collision of Shoemaker-Levy 9 with planet Jupiter was said to be the first ever solar systems collision observed.
How many moles of a gas sample are in a 5.0 L container at 205 K and 340 kPa?
(The gas constant is
L kPa
8.31
mol K
)
Round your answer to one decimal place and enter the number only with no units.
Your Answer:
Answer
Answer:
1.0 mole
Explanation:
From the question given above, the following data were obtained:
Volume (V) = 5 L
Temperature (T) = 205 K
Pressure (P) = 340 KPa
Gas constant (R) = 8.31 KPa.L/Kmol
Number of mole (n) =?
Using the ideal gas equation, the number of mole of the gas in the container can be obtained as follow:
PV = nRT
340 × 5 = n × 8.31 × 205
1700 = n × 1703.55
Divide both side by 1703.55
n = 1700 / 1703.55
n = 1.0 mole
Thus, the number of mole of the gas in the container is 1.0 mole
A sample of helium gas at 72.0 degrees C and 1.18 atm has a volume of 1.893 L. Calculate the pressure of the helium when the volume of the sample is 1.234 L at standard temperature?
Answer:
.....
Explanation:
D0wnload Phot0Math......................
How many grams would be in 4.45 x 10^23 molecules of N203
Answer:
56.24g
Explanation:
To find the mass of N2O3 in 4.45 x 10^23 molecules, it must first be converted to moles by dividing the number of molecules in N2O3 by Avagadro's number (6.02 × 10^23).
number of moles in N2O3 = 4.45 x 10^23 ÷ 6.02 × 10^23
n = 4.45/6.02 × 10^(23 - 23)
n = 0.74 × 10^0
n = 0.74moles.
Using the formula below to find the mass of N2O3;
mole = mass ÷ molar mass
Molar mass of N2O3 = 14(2) + 16(3)
= 28 + 48
= 76g/mol
mass = mole × molar mass
Mass = 0.74 × 76
Mass = 56.24g
Steven placed an ice cream scoop under hot water before scooping ice cream. Which describes how the ice cream scoop was affected
Answer: Okay so i don't know how i can explain this but.. OK so Steven placed an ice cream scoop right? and put it under hot water so i would say it would make the ice cream scoop hot? and then using it to scoop the ice cream i could say it would be a melting affection i think
Explanation:
im am so sorry pls forgive me is i am wrong i tried my best so at least give me a like for effort.. i hope u have a great day :)
Fresh vegetables with high water content do not freeze well. Explain.
a) water expands whenit freezes and damagesthecell wall.
b) water contracts when it freezes and damagesthe cell wall.
c) water expands whenit freezes and does not damagethecell wall.
d) water contracts when it freezes and does not damagethecell wall.
e) water does not change in size whenit freezes.
Answer:
a) water expands when it freezes and damages the cell wall.
Explanation:
We know that most liquids expand when heated and contract when cooled. Water does not behave in the same way.
Water contracts on cooling from any temperature until 4°C when it begins to expand until 0°C. Hence a given mass of water has its least volume and highest density at 4°C.
Hence, fresh vegetables with high water content do not freeze well because water expands when it freezes and damages the cell wall.
There are 16 ounces in a pound. How many pounds are in 52 ounces?
What is the universe made of? Astronomers face an embarrassing conundrum: they don't know what 95% of the universe is made of.
Answer:
I think u understand this answers
why silicon exist as solid at room temperature while chlorine exist as gas ?
Answer:
Hello Dear!..Explanation:
CO2 consists of individual molecules with one central carbon atom double bonded to two oxygen atoms. Silicon does not form double bonds with oxygen. ... because of this reason co2 is gas but sio2 is solid.
Hope that helps you Buddy ...
Take care...
Buhbye!
When the common ion effect is in action, the equilibrium of a system will shift to: Select the correct answer below:
a. decrease the amount of the common ion in the system
b. increase the amount of the common ion in the system
c. depends on the ion
d. The system will not shift at all.
Answer:
a. decrease the amount of the common ion in the system
Explanation:
The correct option is - a. decrease the amount of the common ion in the system
Reason -
Adding a common ion decreases solubility, as the reaction shifts toward the left to relieve the stress of the excess product.
Adding a common ion to a dissociation reaction causes the equilibrium to shift left, toward the reactants, causing precipitation.
Which of the following phrases best describes a scientist?
A person who learns about the world by observing it
A person who is highly educated
A person who understands how the world behaves
A person who is extremely knowledgeable about the world
Answer:
A
Explanation:
A scientist is a person who conducts scientific research to advance knowledge in an area of interest.
HistoryIn classical antiquity, there was no real ancient analog of a modern scientist. Instead, philosophers engaged in the philosophical study of nature called natural philosophy, a precursor of natural science. It was not until the 19th century that the term scientist came into regular use after it was coined by the theologian, philosopher, and historian of science William Whewell in 1833.
examples are
AristotleAlbert EinsteinElements in the same period generally have:
A. Similar chemical groups.
B. The same number of electrons in the outer energy level.
C. Similar physical properties.
D. None of these.
Answer:
C
Explanation:
similar physical properties
3. Which of the following affects the angle at which the sun's rays hit Earth?
a. weather
b. latitude
c. sea level
d. wind
Answer:weather
Explanation:
A ______ is a hole where the steam looks a lot like a smoke
A DRY ICE is hole were the steam looks a lot a smoke
Automobile air bags inflate following a serious
impact. The impact triggers the following chemical
reaction:
2NaN3(s) + 2Na(s) + 3N2(g)
If an automobile airbag has a volume of 11.6 L, what mass of NaN3 (in g) is required to fully inflate the airbag upon impact? Assume STP conditions.
Express your answer in grams to three significant figures.
Answer:
b
Explanation:
What are the reactants and products of a redox reaction, neutralization reactions, and precipitation reactions?
Answer:
Precipitation reactions are ones in which at least one of the reactants is in the aqueous phase (i.e., dissolved in water), and a solid forms on the product side which was not present on the reactant side. If all the reactants are solid, then a solid product forming should not be called a precipitate. To be called a precipitate, an insoluble product must form from within solution, either from a solid and solute interacting, or from an interaction strictly between solutes.
Explanation:
molarity, chemistry general chemistry
Answer:
a. 0.026 M
Explanation:
Molarity is a measure of the molar concentration of a solution. It can be calculated by using the following formula:
Molarity = n/V
Where;
n = number of moles (mol)
V = Volume of solution (L)
Based on the information provided;
V = 23.2mL = 23.2/1000 = 0.0232 L
n = ?
To get the number of moles of KHP, we use the formula:
mole = mass/molar mass
mole (n) = 0.123/204.2
mole (n) = 0.0006024mol
Molarity = n/V
Molarity = 0.0006024 ÷ 0.0232
Molarity = 6.024 × 10^-4 ÷ 2.32 × 10^-2
Molarity = 6.024/2.32 × 10^(-4--2)
Molarity = 2.59 × 10^-2
Molarity = 0.026 M
Answer:
c
Explanation:
a substance that is found naturally in the Earth and that does not contain plant or animal matter. Gold is an example.
Answer:
COPPER , SILVER, GRAPHITE, WATER , POTASSIUM , LEAD AND .........ETC
Explanation:
a cube is 5.00 cm on each side and has a mass of 600.0 g. what is its density?
Answer:
7,491 lb/cu ft.
Explanation:
URGENT PLZ HELP
According to AUFBAU, which of the following sublevels is of highest energy?
a) 2p
b) 3d
c) 3s
d) 4s
Is vinegar acidic, alkaline or neutral?
Answer:
Substances over 7 are categorized as basic, with 7 being the neutral point. Water has a pH level of 7. Substances with pH levels under 7 are categorized as acidic. Vinegar is acidic.
Explanation:
You can change it a little if you want. Hope this helps!
Vinegar is acidic. The only vinegar that has alkaline is apple cider vinegar, but all types of vinegar are acidic.
This equation is not balanced. Click on the coefficient we should change first.
help ASAP
Answer: The coefficient we should change first is for [tex]NO_{3}[/tex].
Explanation:
The given reaction equation is as follows.
[tex]Al + Ni(NO_{3})_{2} \rightarrow Al(NO_{3})_{3} + Ni[/tex]
Here, number of atoms present on reactant side are as follows.
Al = 1Ni = 1[tex]NO_{3}[/tex] = 2Number of atoms present on the product side are as follows.
Al = 1Ni = 1[tex]NO_{3}[/tex] = 3To balance this equation, multiply Al by 2 and [tex]NO_{3}[/tex] by 3 on reactant side. Also, multiply [tex]Al(NO_{3})_{3}[/tex] by 2 and Ni by 3 on the product side.
Hence, the equation can be rewritten as follows.
[tex]2Al + 3Ni(NO_{3})_{2} \rightarrow 2Al(NO_{3})_{3} + 3Ni[/tex]
Now, number of atoms present on reactant side are as follows.
Al = 2Ni = 3[tex]NO_{3}[/tex] = 6Number of atoms present on product side are as follows.
Al = 2Ni = 3[tex]NO_{3}[/tex] = 6Since, the atoms on both reactant and product side are same. Hence, it is now a balanced chemical equation.
Thus, we can conclude that the coefficient we should change first is for [tex]NO_{3}[/tex].
The equation shows neutralization of an acid and a base to produce a salt and water
Answer:
tRUE??
Explanation:
Someone please help!
Answer:
Warm Springs temperature
Explanation: