PLEASE HELP QUICKLY THANK YOU
Answer:
the answer is A
Explanation:
since during a cold front the cold air replaces the warm air
Answer:
during a cold front, cold air mass is replaces a warm air mass.
Explanation:
hope this helps
Suppose the scenario of the mystery creature in the garden was a real situation. How could you apply your knowledge of classification and your experience using a taxonomic key to identify the organism? Why would this process be important?
You wish to make a 0.405 M hydrochloric acid solution from a stock solution of 3.00 M hydrochloric acid. How much concentrated acid must you add to obtain a total volume of 100 mL of the dilute solution?
Answer:
Explanation:
We have to make 100 mL 0f .405M HCl from 3 M solution of HCl .
volume of 3M to be taken required . Let this volume be V litre .
V litre of 3M will contain 3 V moles of HCl .
moles contained by 100 mL of ,405 HCl = .405 x .1 = .0405 moles .
So 3V = .0405
V = .0405 / 3 litre
= .0405 x 1000 / 4 mL
= 10.125 mL
So we have to take 10.125 mL of 3M HCl and add water to them to make its volume 100 mL .
How many moles of carbon (C) are there in 92.5 g of C?
Answer:
c are there 93.5 of c yan siguro
Elements in a vertical column on the Periodic Table have similar properties and are all members of the same
of elements.
Answer:
ok thx for the imformation can you help me with my qustion
Explanation:
Due to their comparable chemical activity, the periodic table's vertical columns are referred to as groups or families. The number of valence electrons and chemical characteristics are the same for all members of a family of elements.
What is properties in vertical column on the Periodic Table?The vertical columns of the periodic table also have a unique name. A group is what we call each column.
Each set of elements has an equal number of electrons in the outer orbital. The outer electrons are sometimes referred to as valence electrons.
The same valence shell electron arrangement gives the elements in the same group comparable chemical characteristics.
Because the valence shell electron configuration of the elements changes gradually along the row, the elements exhibit a gradual change in their chemical characteristics.
Therefore, elements in a vertical column on the Periodic Table have similar properties.
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please help quick will give brainliest
Answer:
I think it's Physical, Chemical, then Physical
Explanation:
I hope I'm right, those answers sound about right to me
Compare the way that frogs breathe when they are tadpoles with the way frogs breathe when they are adults.
Answer:Frogs breathe through gills underwater to get oxygen and when frogs are adults they breathe through their lungs to get oxygen.
Explanation:
How does an object become electrically charged?will give brainliest
Though the transfer of charges from one object to another
Through the movement of heat from one object to another
Through the transfer of sound from one object to another
Through the movement of water from one object to anoth
Answer:
It is Though the transfer of charges from one object to another, or (A).
Which of the following molecules has a trigonal planar shape?
Answer:
B
Explanation:
The geometry of the BF3 molecule is called trigonal planar
Answer:
bf3 is a trigonal shape
Explanation:
no.of pairs = v+m-c+a/2
then it ' ll get 3
so sp2 hybridization
sp2 is a trigonal planar
The Beryllium (Be) atom is smaller than the Barium (Ba) atom. Choose the evidence statement that best supports this claim. A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 8 electron shells. A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 8 electron shells. A Beryllium (Be) atom has 3 electron shells, whereas a Barium (Ba) atom has 8 electron shells. A Beryllium (Be) atom has 3 electron shells, whereas a Barium (Ba) atom has 8 electron shells. A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells. A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells. A Beryllium (Be) atom has 1 electron shells, whereas a Barium (Ba) atom has 6 electron shells.
Answer:
A Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells
Explanation:
Beryllium (Be) is an element in group two of the periodic table with atomic number 4 (Is2 2s2). On the other hand, barium (Ba) is an element in group 2 of the periodic table with atomic number 56. However, as stated in the question, the Beryllium (Be) atom is smaller than the Barium (Ba) atom.
This is because a Beryllium (Be) atom has 2 electron shells, whereas a Barium (Ba) atom has 6 electron shells. The electron shells of Barium contains more electrons, which is responsible for the large size of the Barium atom. Note that, the higher the number of atoms, the larger the atomic size.
Identify three pairs of statements that could be used to start developing a taxonomic key for a mouse, turtle, flamingo, and cat. (NEED ASAP DUE IN 2 MINUTES!!!!)
Answer:
A dichotomous key is a tool that allows the user to determine the identity of items and organisms in the natural world. ... In each step, the user is presented with two statements based on characteristics of the organism. If the user makes the correct choice every time, the name of the organism will be revealed at the end
Explanation:
determine how many millilitres of a 4.25 M HCl solution are needed to react completely with 8.75 g CaCO3?
2HCl + CaCO3 --> CaCl2 + CO2 + H2O
Answer:
41 mL
Explanation:
Given data:
Milliliter of HCl required = ?
Molarity of HCl solution = 4.25 M
Mass of CaCO₃ = 8.75 g
Solution:
Chemical equation:
2HCl + CaCO₃ → CaCl₂ + CO₂ + H₂O
Number of moles of CaCO₃:
Number of moles = mass/molar mass
Number of moles = 8.75 g / 100.1 g/mol
Number of moles = 0.087 g /mol
Now we will compare the moles of CaCO₃ with HCl.
CaCO₃ : HCl
1 : 2
0.087 : 2/1×0.087 = 0.174 mol
Volume of HCl:
Molarity = number of moles / volume in L
4.25 M = 0.174 mol / volume in L
Volume in L = 0.174 mol /4.25 M
Volume in L = 0.041 L
Volume in mL:
0.041 L×1000 mL/ 1L
41 mL
Calculate the nuclear binding energy in mega-electronvolts (MeV) per nucleon for Th232. Th232 has a nuclear mass of 232.038 amu.
Answer:
1720 MeV
Explanation:
Thorium has 90 protons and 142 neutrons
The mass of each proton is 1.007277 amu
The mass of each neutron is 1.008665 amu
The mass of 90 protons is 90 * 1.007277 amu = 90.65493 amu
The mass of 142 neutrons is 142 * 1.008665 amu = 143.23043 amu
Total calculated mass of nucleons = 90.65493 amu + 143.23043 amu = 233.88536
Mass defect = 233.88536 amu - 232.038 amu = 1.84736 amu
We convert from amu to MeV using the conversion factor of 931
Binding energy = 1.84736 amu * 931 = 1720 MeV
I am very confused on how to do this please read the following attachments
Answer:
you will add then subtract to get the answer
The powerful, warm, fast Atlantic Ocean current is called the
A.Atlantic Curren
B.Rip Tide
C.Gulf Stream
D.El Nino
60 points!
Answer:
C
Explanation:
Warm water is heated by the Gulf Stream, a warm air current that originates in the Gulf of Mexico. As the warm water moves north, it forces cooler water to sink and move south.
the reason of which I do not believe it is a Rip Tide is because rip tides have been found in both several rivers and oceans, if not all.
What is the formal charge of P?
Answer:
The formal charge on P would be 0 for this structure.
Explanation:
oyegen and hydrogen
4 oxegens
Answer:
Oxygen
Explanation:
What classification of alcohol would be synthesized from the reaction of 2-butanone with a Grignard reagent? From the reaction of butanal with a Grignard reagent?A. A secondary alcohol; a secondary alcoholB. A tertiary alcohol; a secondary alcoholC. A secondary alcohol; a primary alcoholD. A tertiary alcohol; a primary alcohol
Answer:
B. A tertiary alcohol; a secondary alcohol
Explanation:
Grignard reagent has a formula RMgX where X is a halogen, and R is an alkyl or aryl group.
Grignard reagent reacts with aldehydes and ketones to form alcohol. However the classification (that is; Primary, secondary and tertiary) varies depending on which it reacts with.
2-butanone is a ketone.
Ketones reacts with Grignard reagent to form tertiary alcohol
Butanal is an aldehyde.
Aldeyde reacts with grignard reagent to form Secondary alcohol
The answer is; Tertiary alcohol; Secondary alcohol
Answer:
It takes 30 minutes to feel the effects of alcohol.
Explanation:
It may take an hour to metabolize a drink, but it takes approximately thirty minutes before you feel alcohol's effects. This is a good gauge for pacing yourself. Drinking more than one drink every 30 minutes means you are probably drinking too much, too fast.
Which action would shift this reaction away from solid calcium fluoride and toward the dissolved ions?a) adding calcium ionsb) adding fluoride ionsc) removing fluoride ionsd) removing calcium fluoride
Answer:
c) removing fluoride ions.
Explanation:
Hello!
In this case, for this solubility product problem, it is very convenient to write the undergoing ionization reaction:
[tex]CaF_2(s)\rightleftharpoons Ca^{2+}(aq)+2F^-(aq)[/tex]
In such a way, via the Le Chatelier's principle, we remember that the addition of reactants shifts the reaction towards products, adding products shifts the reaction towards reactants, removing reactants shifts the reaction towards reactants and removing products shifts the reaction towards products. In means, that the best way to shift this reaction away from solid calcium fluoride and toward the dissolved ions is c) removing fluoride ions, because it is a product and its removal favors the formation of more products.
Best regards!
Which orders the activities from the greatest to least impact to reduce consumption of fossil fuels?
drive an electric car to work, walk to work, carpool to work
Carpool to work, walk to work, drive an electric car to work
walk to work, carpool to work, drive alone to work
drive alone to work, drive an electric car to work, carpool to work
Answer:
drive an electric car to work, walk to work, carpool to work
Explanation:
The orders of the activities from the greatest to least impact to reduce consumption of fossil fuels, is one in which the least fossil fuel is used;
The goal of driving an electric car is to reduce dependence on fossil fuels. Electric cars prides as an automobile system with no carbon emission nor usage. Walking to work does not require carbon consumption too. Carpool involves use of fossil fuels.Answer:c
Explanation:
Question 3 of 10
Which statement describes a reason scientists might use a programmed
glider instead of a submarine with a crew to study the bottom of an ocean
trench?
A. High pressures
res there could crush a submarine.
B. The low salinity there could harm human passengers.
C. The high density of plant growth there is difficult to navigate.
D. Sunlight causes temperatures there to rise dangerously.
Answer:c
Explanation:
Answer:
a aa aaa aaaa aaaaaa
Explanation:
this is due tonight and i need some help w/ it! how do mass and distance affect the strength of the force of gravity? -btw i need a few sentences!
Answer:
Mass is the amount of matter in an object. The distance is how far apart two places are from each other. They are related because the more mass the more gravitational force as then there is more pressure and then the gravitational force attracts the two objects closer. The more distance, the less the gravitational force as then the gravitational force will have more trouble attracting the two objects toward each other.
Which of the following is a physical appearance of a substance?
A. Complicated
B. Homogeneous
C. Heterogeneous
D. Non-uniform
Answer:
Heterogeneous
Explanation:
not clear explanation sooory
What is the molarity of an aqueous solution that contains 0.072 g C2H6O2 per gram of solution? The density of the solution is 1.40 g/mL.
Answer:
1.626 M
Explanation:
Let's start by calculating how many grams of C₂H₆O₂ are there per mL of solution:
1 mL of solution weighs 1.40 g.1.40 g of solution * [tex]\frac{0.072gC_2H_6O_2}{1gsolution}[/tex] =0.1008 g C₂H₆O₂So the C₂H₆O₂ concentration can be expressed as 0.1008 g/mL.
Now we convert g/mL to molarity, using the molar mass of C₂H₆O₂:
0.1008 g C₂H₆O₂ ÷ 62 g/mol = 1.626x10⁻³ mol C₂H₆O₂(1 mL = 0.001 L)
1.626x10⁻³ mol C₂H₆O₂ / 0.001 L = 1.626 MThe molarity of the solution is given as 1.626M
We can calculate the mass of C₂H₆O₂ in mL of solution:
1 mL of solution weighs 1.40 g.
1.40 g of solution × 0.072/1
=0.1008 g C₂H₆O₂
C₂H₆O₂ concentration = 0.1008 g/mL.
Conversion of g/mL to molarity
0.1008 g C₂H₆O₂ ÷ 62 g/mol = 1.626x10⁻³ mol C₂H₆O₂
(1 mL = 0.001 L)
1.626x10⁻³ mol C₂H₆O₂ / 0.001 L = 1.626 M
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Which seedless plants have been used to treat bee stings?
club mosses
horsetails
ferns
liverworts
Answer:
ferns
Explanation:
e d g e n u i t y sucks dunnit?
A single replacement reaction is a reaction in which one element replaces a similar element within a compound. (2 points) True False
Answer:
true
Explanation:
pentaoxygen monochloride formula
Answer:
Explanation:
O5Cl
Which of the following would be an example of a compound? *
5 poir
oxygen
carbon dioxide
sand
O carbon
Answer:
carbon dioxide
Explanation:
An example of a compound from the given choices is carbon dioxide.
A compound is any substance composed of two or more atoms /elements joined together in a definite grouping .
The properties of a compound are different and distinct from the elements that makes them. From the choices, carbon dioxide is made up of two elements which are carbon and oxygen. oxygen and carbon are elements.Sand is a mixture.The rate constant for the reaction 3A equals 4b is 6.00×10 how long will it take the concentration of a to drop from 0.75 to 0.25M from the unit of the rate constant we know it is a second reaction order?a) 2.2×10^−3 min
b) 5.5×10^−3 min
c) 180 min
d) 440 min
e) 5.0×10^2 min
This question is incomplete, the complete question is;
The rate constant for the reaction 3A equals 4B is 6.00 × 10⁻³ L.mol⁻¹min⁻¹.
how long will it take the concentration of A to drop from 0.75 to 0.25M ?
from the unit of the rate constant we know it is a second reaction order
OPTIONS
a) 2.2×10^−3 min
b) 5.5×10^−3 min
c) 180 min
d) 440 min
e) 5.0×10^2 min
Answer:
it will take 440 min for the concentration of A to drop from 0.75 to 0.25M
Option d) 440 min is the correct answer
Explanation:
Given that;
Rate constant K = 6.00 × 10⁻³ L.mol⁻¹min⁻¹
3A → 4B
given that it is a second reaction order;
k = 1/t [ 1/A - 1/A₀]
kt = [ 1/A - 1/A₀]
t = [ 1/A - 1/A₀] / k
K is the rate constant(6.00 × 10⁻³)
A₀ is initial concentration( 0.75 )
A is final concentration(0.25)
t is time required = ?
so we substitute our values into the equation
t = [ (1/0.25) - (1/0.75)] / (6.00 × 10⁻³)
t = 2.6666 / (6.00 × 10⁻³)
t = 444.34 ≈ 440 min {significant figures}
Therefore it will take 440 min for the concentration of A to drop from 0.75 to 0.25M
Option d) 440 min is the correct answer
1. Which of these is true of all animals?
O A. They are producers.
B. They are unicellular.
C. They are multicellular.
D. They reproduce asexually.
Other:
5. If a farmer has a corn crop and a herd of cows, which energy resource 20 poin
is the farmer most likely to use? *
O A. Geothermal
B. Biomass
C. Wind
D. Hydropower
I need y’all’s help xD please help <3 15 points ; )
Answer:
Biomass
Explanation:
It is Biomass because biomass is a Renewable and organic energy that is gotten from living things to generate sustainable electric energy. The farmer with corn and herds of cows has biomass energy resources because it is gotten from living things both plants and animals. The materials use for biomass gotten from plants and animals are woods, barks, straw, animals dung,gases produced by animals e.t.c.
