Answer:
a ground state electron jumps to a higher energy level
Balance the following chemical equation by providing the correct coefficients.
[ ]Na+[ ]H2O -> [ ] NaOH + [ ]H2
Answer:
[2 ]Na+[2 ]H2O -> [ 2] NaOH + [1]H2
Which is an example of geologic evolution?
Answer:
A gradual change in the shape of the continents.
Explanation:
An example is tropical plant fossils are found in the Artic.
An example of geologic evolution is a gradual change in the size of continents.
Geological evolution is the process of gradual change and events in antiquity that include the steps to create the Earth.
At first, there was extreme volcanism, later the planet cooled to create the crust. Also, condensed water vapor formed the oceans and seas.
The geological history of Earth follows the major geological events in Earth's past based on the geological time scale, a system of chronological measurement based on the study of the planet's rock layers (stratigraphy).
Geological evolution studies the shape of the globe, how it formed, and the relationships of the different eras and the matter that changed during them.
Therefore, An example of geologic evolution is a gradual change in the size of continents.
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5.
Which sentence best describes the relationship between genes and chromosomes?
A.
Genes are found within chromosomes.
B.
Several chromosomes make up one gene.
C.
Genes and chromosomes are the only things that form the nucleus.
D.
Several genes are attached to different parts of the Golgi apparatus.
Answer:
a
Explanation:
A nuclear power plant is used to generate:
steam
solar energy
heat energy
electricity
Answer:
Anuclear power plant is used to generate electricity
Answer:
Anuclear power plant is used to generate electricity
thank me later
Explanation:
i need helpppp
blank 1:
blank 2:
blank 3:
blank 4:
Answer:
Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃
The coefficients are: 1, 6, 3, 2
Explanation:
__Fe₂(SO₄)₃ + __KOH —> __K₂SO₄ + __Fe(OH)₃
To determine the correct coefficients, we shall balance the equation. This can be obtained as follow:
Fe₂(SO₄)₃ + KOH —> K₂SO₄ + Fe(OH)₃
There are 2 atoms of Fe on the left side and 1 atom on the right side. It can be balance by writing 2 before Fe(OH)₃ as shown below:
Fe₂(SO₄)₃ + KOH —> K₂SO₄ + 2Fe(OH)₃
There are 6 atoms of OH on the right side and 1 atom on the left side. It can be balance by writing 6 before KOH as shown below:
Fe₂(SO₄)₃ + 6KOH —> K₂SO₄ + 2Fe(OH)₃
There are 6 atoms of K on the left side and 2 atoms on the right side. It can be balance by writing 3 before K₂SO₄ as shown below:
Fe₂(SO₄)₃ + 6KOH —> 3K₂SO₄ + 2Fe(OH)₃
Now, the equation is balanced.
Therefore, the coefficients are: 1, 6, 3, 2
How many grams are in 5 mole of carbon dioxide? (CO2)
plz include your work
Answer: Hence, mass of CO2 is 22g.
Explanation: N/A
Answer:
mole=mass/RMM
5mole =mass/44
mass= 44×5=220grams
Explanation:
Co2 molecular weight =44 ,cross multiply then you get your mass.
I need help with this question.
Instruction : Answer the following questions using the given options.
Questions :
1. The reaction between an acid and a base is an example of ___ reaction ?
a. Valence
b. Endothermic reaction
c. Chemical reaction
d. Exothermic reaction
2.The following are the factors affecting the rate of a chemical reaction except ___
a. catalyst
b. nature of reactants
c. activation energy
d. lights
3.___ gives a dense white fume when in contact with HCL
a. propane
b. ammonia
c. tetraoxosulphate(vi) acid d. water
Explanation:
The reaction between an acid and a base is known as a neutralisation reaction.
Reactant concentration. Increasing the concentration of one or more reactants will often increase the rate of reaction. ...
Physical state of the reactants and surface area. ...
Temperature. ...
Presence of a catalyst.
ammonia
An alkaline gas which produces dense white fumes when reacted with HCl gas is ammonia and fumes are of compound ammonium chloride.
BRAINILIEST PLEASE
the movement of carbon between the atmosphere, land, and ocean is called what?
what do elements and atoms have in common
Answer:
what they have in common is consist of electrons, protons, and neutrons.
Explanation:
A shampoo has a pH of 8.59. What is the [H3O+] in the shampoo?
Answer in units of M.
(part 2) What is the [OH−] in the shampoo?
Answer in units of M.
Answer:
2.57 e-9
Explanation:
The formula is H3O=10^-Ph
10^-8.59=2.57 e-9
A
B
prevents different air masses from mixing.
a. Direction
b. Location
c. Density
d. Size
Answer:
c Density
Explanation:
I don'tknow if I am right if I am wrong correct me
This question is about acids and bases.
Which ion is found in all acids?.
CI-
H
Nat
OH-
Answer:
OH- is the correct answer
mark me brainst answer
Answer:
h
Explanation:
The common ion in all acids is the hydrogen or hydronium ion
7. A certain hydrocarbon, CxHy, is burned (reacts with O2 gas) and produces 1.955 g of CO2 for every
1.000 g of H20. What is the empirical formula of this hydrocarbon?
CxHy + (X + y/4) O2 -> xCO2 + y/2 H2O
Answer:
The empirical formula of the hydrocarbon is C₂H₅
Explanation:
The formula for the hydrocarbon is [tex]C_xH_y[/tex]
The mass of CO₂ produced per 1,000 g of H₂O = 1,955 g
The equation for the chemical reaction is given as follows;
[tex]C_xH_y[/tex] + (x + y/4) O₂ → XCO₂ + y/2H₂O
From the given chemical equation, counting the number of atoms on both sides of the equation, we have;
The molar mass of CO₂ = 44.01 g/mol
The molar mass of H₂O = 18.01528 g/mol
The number of moles of H₂O in 1,000 g of H₂O = 1,000 g/(18.01528 g/mol) = 55.5084351 moles
The number of moles of CO₂ in 1,955 g of H₂O = 1,955 g/(44.01 g/mol) = 44.4217223 moles
Therefore, given that X moles of CO₂ is produced alongside Y/2 moles of H₂O. we have;
X = 44.4217223, Y/2 = 55.5084351
∴ Y = 2 × 55.5084351 = 111.0168702
The ratio of X to Y = X/Y = 44.4217223/111.0168702 = 0.40013488238
∴ The ratio of X to Y = X/Y ≈ 0.4 = 4/10
X/Y ≈ 4/10
The empirical formula is the representation of molecular formula in the smallest whole number ratio of the elements of the molecules
Therefore, when X = 4, Y = 10, from which we have the smallest ratio as;
When X = 2, Y = 5
The empirical formula of the hydrocarbon is therefore, [tex]C_xH_y[/tex] = C₂H₅
The given chemical equation becomes;
C₂H₅ + (2 + 5/4) O₂ → 2CO₂ + 5/2H₂O
C₂H₅ + 3.25 O₂ → 2CO₂ + 2.5 H₂O
We then have;
4C₂H₅ + 13 O₂ → 8CO₂ + 10 H₂O
The empirical formula of the hydrocarbon, [tex]C_xH_y[/tex] = C₂H₅.
Write a summary of the following Physical and Chemical Properties
Answer:
The physical properties of matter are those characteristics that can be measured without altering the atomic structure, while the chemical properties of matter are those characteristics that result in a change in the atomic structure.
Why is there a bond between the ions in potassium chloride
Answer:
Explanation:
When the two atoms are in contact, potassium transfers its outer electron to chlorine which readily accepts it, resulting in both atoms achieving a state of eight outermost electrons. With this electron transfer, the ionic bond in KCl is formed.
Hope this helped!!!
Potassium has just one valence electron and Chlorine has 7 electrons, Chlorine needs just one atom to complete its octet which is provided by Potassium atom for formation of Potassium Chloride (KCl).
What is Chemical Bonding?Chemical bonding is the formation of chemical bonds present between two or more atoms or molecules which give rise to new compound. Bond is formed from electrostatic force present between oppositely charged ions like in ionic bonds or by sharing of electrons like in covalent bonds.
There are two types of Chemical Bonding:
1. Ionic Bonding
It is formed between opposite charged particles like Anion (negatively charged) and Cation (Positively charged) by the strong force of attraction.
For example, KCl formed by the ionic bond formation present between Potassium and Chlorine
2.Chemical Bonding
It is formed between two atoms for completing its octet by sharing of electrons.
For example, [tex]H_2[/tex] formed by sharing the electrons to complete its electronic configuration.
Thus, Potassium has just one valence electron and Chlorine has 7 electrons, Chlorine needs just one atom to complete its octet which is provided by Potassium atom for formation of Potassium Chloride (KCl).
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what types of chemical reactions are needed to make the perfect s'more?
Answer:
sorry i never learned this
Explanation:
what device has made car emissions much cleaner?
automatic transmission
better wheels
tail pipes
catalytic converters
Answer:
automatic transmission
Explanation:
An automatic transmission (sometimes abbreviated to auto or AT) is a multi-speed transmission used in motor vehicles that does not require any driver input to change gears under normal driving conditions.
25 points!! Will give Brainliest What is the molarity of the dilute solution if you dilute 35.0 mL of a 12.0 M solution to make 1000.0 mL of a solution?
Answer:
0.72 good luck with the answer
which of the following statement is not a property of ionic compounds?
A. they are formed because of electrostatic forces.
B. they conduct electricity when dissolve in water
C. they form crystals
D. they have low melting and boiling points
Answer:
I think it would be c
Explanation:
5. Make a graph: Plot your data on the graph to the right of the data table. Draw a line to conn points in order.
Answer:
i did c
Explanation:
What happens when Sulphuric acid is added to into Barium Chloride solution?
Answer:
please give me brainlist and follow
Explanation:
When dilute sulphuric acid is added to barium chloride solution, barium sulphate is formed as a precipitate and hydrogen chloride is formed in aqueous solution.
Please Help me with number 4 I really need help please just tell me which letter is
Answer:
i believe it's D
Explanation:
Answer:
D
Explanation:
If 186.0 liters of gaseous O_{2} at 1.09 atm and 577.0 ºC are required for the model rocket to climb 1000 feet, how many grams of solid KClO_{3} must be in the rocket engine?
Answer:
The right answer is "236.53 g".
Explanation:
The given values are:
P = 1.09 atm
V = 186 liters
The reaction will be:
⇒ [tex]KClO_3 (s)\rightarrow 2Kcl(s)+3O_2(g)[/tex]
The moles of O₂ will be:
= [tex]\frac{PV}{RT}[/tex]
On substituting the values, we get
= [tex]\frac{1.09\times 186}{0.0821\times 850}[/tex]
= [tex]\frac{202.47}{69.785}[/tex]
= [tex]2.90 \ moles[/tex]
Now,
1 mole O₂ is produced from
= [tex]\frac{2}{3} \ mol \ KClO_3[/tex]
then,
2.90 mole O₂ is produced from 2 mol KClO₃
= [tex]\frac{2}{3}\times 2.90[/tex]
= [tex]1.93 \ mol \ KClO_3[/tex]
hence,
The number of grans of solid in the engine will be:
= [tex]1.93\times 122.55[/tex]
= [tex]236.53 \ g[/tex]
What test would be done to prove the color of specific compounds is due to metal ions apart from flame test
Answer:
Borax bead test
Explanation:
Another test that can be used to identify colored ions in a specific compound such as salt is called "Borax bead test".
This test involves use of a clear glassy bead of borax that is joined together in a wire loop which is going to be involved in chemical reaction with the salts of certain metals.
This reaction will produce colors that we can use to identify the exact metal ions that are present.
why can molar mass be used as a conversion factor
From the relative atomic mass of each element, it is possible to determine each element's molar mass by multiplying the molar mass constant (1 g/mol) by the atomic weight of that particular element. The molar mass value can be used as a conversion factor to facilitate mass-to-mole and mole-to-mass conversions.
Answer:
A substances molar mass is determined by increasing its relative nuclear mass by the molar mass constanttt (1 g/mol). So the molar mass consistent can be utilized to change mass over to moles. So by duplicating a given mass by the molar mass, the measure of moles of the substance can be determined.
Explanation:
From the general nuclear mass of every component, it is feasible to decide every component's molar mass by duplicating the molar mass steady (1 g/mol) by the nuclear load of that specific element.The molar mass worth can be utilized as a change factor to work with mass-to-mole and mole-to-mass transformations.
Brainliest?
What are the FOUR major biogeochemical cycles upon which all life depends?
Answer:
Some of the major biogeochemical cycles are as follows: (1) Water Cycle or Hydrologic Cycle (2) Carbon-Cycle (3) Nitrogen Cycle (4) Oxygen Cycle. The producers of an ecosystem take up several basic inorganic nutrients from their non-living environment.
Explanation:
In the Eqn: [3 Fe + 2 O2 → Fe3O4], How many grams of Fe will be needed to react with 6.85 mol O2 ?
Answer:
575g
Explanation:
Mole ratio Fe : O2 = 3:2
so moles of Fe = 1.5 x 6.85 = 10.275 moles
mass=moles x Ar
Ar Fe= 56
mass = 10.275 x 56=575g
How many poles does a magnet have?
PLEASE HELP ME!!!!! ILL GIVE BRAINLIEST
Does Water gives the body the ability to do work. True or false
Answer:
I think it's true
Explanation:
hey by the way