1. Answer the
C.
i. Addition reaction
111. Displacement reaction.
i i ti on
a What is a chemical reaction? Mention its types.
b. Explain the following types of chemical reaction with one example
ii. Decomposition reaction
c. What are the conditions required for the decomposition reaction to
d. What is acid-base reaction? Why is it also called neutralization re
e. What is the chemical reaction in which the exchange of electrop
electronegative ions occurs in aqueous solution? Write one example
f, Explain why the double displacement reaction is also called
. What is the state of reactant and products like in the double decomposition
h. How does the application of heat increase the rate of a chemical reaction
i. What is the effect of the surface area of reactants on the rate of chemical:
In
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with examples.
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b. Ammo
Alumit
d. Coppe
e.
Magne
Calciu
g
Silver
h. Sulph
What happer
i. red m
iii. phos
V.
silve
vi. amm
vii. wate
ix. pota
X. carb
xii. lime
decomposition reaction.
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Multi
Explain with examples.
i What is a catalyst? Write its type with examples.
k. Differentiate between
1. Positive catalyst and negative catalyst.
ii. Exothermic reaction and endothermic reaction.
2. Complete the following reactions and also mention their types.
i. Mg+
MgSO4+H
A
Caco, +
A
1. The pro
U
ii. Ca (HCO3)2
iii. MgCO,
a. Balar
c. Word
2. The che
is calle
Answer:
Explained below
Explanation:
In a decomposition reaction, a substance (commonly a molecule) descomposes in the elements that originally formed it.
The standard formula is:
AB > A + B
In fact, is the opposite of a synthesis reaction.
An example of decomposition reaction is:
H2O > 2H + O
the correct electron-dot formula for a molecule of chlorine?
Answer:
Cl has 7 dots
if its Cl2; Cl-Cl it will contain 14 dots
Explanation:
The electron-dot formula of the chlorine molecule Cl₂is shown in the attached diagram below.
What is the lewis electron dot diagram?A lewis electron dot structure is used to represent the number of bonds, the bonding atoms, and the lone pairs left in the atoms in the molecule.
Lines are shown between atoms that are bonded to one another and excess electrons or lone pairs are represented as dot pairs and are placed next to the atoms.
As the valence electrons of each chlorine atom are equal to seven from the electronic configuration of the chlorine atom.
First, the total number of valence electrons in a chlorine molecule is 7 + 7 = 14.
As each chlorine atom needs only one electron to complete its octet. As the octet completes, the rest of the electrons are assigned as the lone pairs of atoms. Therefore, each chlorine atom has three lone pairs of electrons on it.
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Which model of the atom was used as a result of JJ Thomson's cathode ray
experiments?
a. Plum pudding model
b. Nuclear model
C. Planetary model
d. Quantum mechanical model
Answer:
a. Plum pudding model
Explanation:
The plum pudding model of the atom was proposed by J.J. Thomson. It was the model he derived from his experiment on the gas discharge tube.
J.J Thomson was the first person to discover electrons which he called cathode rays because in the discharge tube, they emanate from the cathode.
This led him to suggest the plum pudding model of the atom. The model reflects electrons being surrounded by a volume of negative charges.Kobe Bryant was recorded to have thrown a basketball 10m in 0.75 seconds. What was the ball’s speed
rip kobe Bryant rip 24
Answer:
Rip :(((
Explanation:
Im so sorry for not answering but rip kobe :(
When water changes into water vapor, this is called
a. condensation
b. transpiration
c. precipitation
d. evaporation
How many energy sublevels are in the second principal energy level?
2 sublevels
Level one has one sublevel – an s. Level 2 has 2 sublevels - s and p. Level 3 has 3 sublevels - s, p, and d. Level 4 has 4 sublevels - s, p, d, and f.
PLEASE MARK ME AS BRAINLIEST!!
The ___ is the number of protons in the nucleus of an atom of an element.
Fill in the blank.
Name the type of reaction and give the coefficients needed to balance the following skeleton reaction: ___Mg + ___Fe2O3 → ___Fe + ___MgO A) synthesis with coefficients 3,1,2,3 respectively B) synthesis with coefficients 3,2,2,3 respectively C) single replacement with coefficients 3,1,2,3 respectively D) Single replacement with coefficients 1,1,2,3 respectively
Answer:
C,
Explanation:
3Mg + Fe2O3 ---> 2Fe + 3MgO
this is a single replacement reaction.
The relationship between Fahrenheit and Celsius is as follows: °F = °C * 1.8 + 32 If the weather forecaster says it will be 14 °F, what is that in Celsius?
Answer:
The answer is "-10° C".
Explanation:
Fahrenheit and Celsius, both use scales for measuring their temperature standard. The Fahrenheit suggests, as just a cold water point by taking 32° F and hot water rate by taking 212° F. The freezing temperature of both the water at the Celsius scale is 0° C, as well as the boiling point of its water at 100° C.
Converting the Fahrenheit to Celsius:
Formula: [tex]\bold{^{\circ}F = ^{\circ}C \times 1.8 + 32}[/tex]
°F= 14
[tex]\to 14 = ^{\circ}C \times 1.8 + 32}\\\\\to 14 -32 = ^{\circ}C \times 1.8 \\\\\to -18 = ^{\circ}C \times 1.8 \\\\\to ^{\circ}C = \frac{-18}{1.8} \\\\\to ^{\circ}C = \frac{-180}{18} \\\\\to ^{\circ}C = - 10[/tex]
1) Which of the following is NOT a step in the scientific method *
Formulating a scientific question
Making Observations
Developing a hypothesis
Applying for a license
Answer:
applying for a license
Answer:
Applying for a license
Explanation:
This is because you have to have observations,hypothesis and a scientific equation when using The Scientific Method.
Maceo is making rock candy. Which best describes the steps she should take? heat a saturated sugar water solution, dissolve more sugar, then let the solution cool heat a saturated sugar water solution, dissolve more sugar, and wait until the water evaporates saturate a water solution, increase the pressure, and dissolve more sugar saturate a water solution, lower the pressure, and dissolve more sugar
Answer:
(A) is the answer
Explanation:
(A) heat a saturated sugar water solution, dissolve more sugar, then let the solution cool
Answer:
the answer is a
Explanation:
im on edg rn
Suppose that an electron starts in the n=4 shell of a neutral hydrogen atom. How many photons will be emitted once it has fallen to the n=1 shell?
Answer: If an Atom has 12 Electrons then if it is a Neutral atom then the Atomic Number of the Atom will be 12.
The Electronic Configuration of Element with Atomic Number 12 will be :
⇒ 1s² 2s² 2p⁶ 3s²
We can notice from the Electronic Configuration that :
Given atom has 2 electrons in the 1st shell.
⇒ In the Shell : n = 1
Number of Electrons = 2
In the similar way : Number of Electrons in 2nd shell = 2 + 6 = 8
⇒ In the Shell : n = 2
Number of Electrons = 8
In the similar way : Number of Electrons in 3rd shell = 2
⇒ In the Shell : n = 3
Number of Electrons = 2
Explanation:
When an electron starts in the n=4 shell of a neutral hydrogen atom and once it has fallen to the n=1 shell, then 3 photons will be emitted.
What is emission of energy?If any electron is presnt in the highest energy shell of an excited atom and when comes back to the ground state then emission of energy takes place.
As we know that by the absorption of one photon, electron will goes on the succeding shell from the previous shell. Similarly when electron come back to the 3rd shell from the 4th shell of a hydrogen atom then 1 photon will emit, from 3rd to 2nd shell 2nd photon will emit and from 2nd to 1st shell 3rd photon will emit.
Hence 3 photons will be emitted once electron will fall into 1st shell from the 4th shell.
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What is the energy of a microwave photon that has a frequency of 9.86 x 1012 Hz?
Answer:
E = 65.37×10⁻²² J
Explanation:
Given data:
Energy of photon = ?
Frequency of photon = 9.86×10¹² Hz
Solution:
Formula:
E = h.f
Here h is planck's constant its value is 6.63×10⁻³⁴ js.
E = 6.63×10⁻³⁴ js × 9.86×10¹² Hz
Hz = s⁻¹
E = 65.37×10⁻²² J
The energy of photon is 65.37×10⁻²² J.
please help!! i don’t know what the heck im doing lol
Answer:
I can help you know how to mark the points.
For the first one point, if you look at the lines that go side to side, you need to find the line that is 20 degrees that's above the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 30 degrees, but is to the right of the blue line. When you plot your point, it should somewhere along the coastline of Saudi Arabia.
For the second point, if you look at the lines that go side to side, you need to find the line that's 40 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that is 10 degrees that's to the left of the blue line. When you plot your point, it should be located somewhere in the South Atlantic Ocean.
For the third point, if you look at the lines that go side to side, you need to find the line that's 20 degrees that's below the blue line. Next, if you look at the lines that go up and down, you need to find the line that's 40 degrees that's to the right of the blue line. When you plot your point, it should be kind of located in the Indian Ocean, but not too far from Africa.
(Not too sure how accurate the instructions were, I haven't done longitude and latitude lines in a while)
Explanation:
Picture:
Describe 1 way process or system that transfers heat by convection. Be specific in details
Be sure to answer all parts. Show the overall reaction for formation of racemic 3−bromohexane from (E)−3−hexene by entering the structures of the products and reactants in the template provided. Part 1 out of 3 draw structure ... arr draw structure ... + draw structure ... (E)−3−hexene (S)−3−bromohexane (R)−3−bromohexane Racemic product = 50% (S) and 50% (R)
Answer:
See explanation
Explanation:
The mechanism for the formation of bromohexane from hexene has been clearly shown in the image attached to this answer.
Hexene is attacked by HBr and a carbocation is first formed as shown. The carbocation is flat and planar. it can be attacked on either face by the bromide ion.
Attack on either faces yields a racemic mixture of the R and S enantiomer as shown in the image.
You can use the mechanism shown to fill in the structures.
please help me with this
Answer:
Speed and acceleration
Explanation:
i would say this bc the formula is related to acceleration if you looking at all the possible exceptions im not a expert in this range but im just giving you what i would pick so if you get it wrong im sorry lol.
Velocity is a combination of what 2 things?
Answer:
Velocity is a combination of speed and direction
where in texas are you most likely to find hoodoos ?
coastal plain
mountains and basins
great plains
north central plains
if the Earth can fit 1000
billion people, why is the
human carrying capacity
likely only between 10-15
billion?
Answer:
because people are not having babies fast enough
Explanation:
Which of the following is an electrolytic cell?
A. Silver (Ag) oxidized, gold (Au) reduced
B. Lithium (Li) oxidized, zinc (Zn) reduced
C. Aluminum (Al) oxidized, zinc (Zn) reduced
D. Iron(II) (Fe) oxidized, aluminum (AI) reduced
Iron (II) (Fe) oxidized, aluminium (Al) reduced. Hence, option D is correct.
What is an electrolytic cell?An electrolytic cell converts electrical energy into chemical energy or vice versa.
Oxidation-reduction reactions are balanced by two half overall chemical equations into an oxidation equation and a reduction equation.
Iron (II) (Fe) oxidized, aluminium (Al) reduced of the following is an electrolytic cell.
Hence, option D is correct.
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Write 2.0 x 10^-3 in standard notation
Answer:
= 3.456 × 1011
(scientific notation)
= 3.456e11
(scientific e notation)
= 345.6 × 109
(engineering notation)
(billion; prefix giga- (G))
= 345600000000
(real number)
Explanation:
i dont know if its math or something else so here are your answers:)
Answer:
0,002
Explanation:
Will give Brainliest! Science question
What does a cladogram show?
A. comparison of the relative ages of organisms
B. evolutionary relationships between organism
C. comparison of species that are most similar
D. ecological relationships between organisms
Answer:
B
Explanation:
I did this and got it correct.
HELP WILL GIVE BRAINLIEST!!
Rank the following items from LEAST to MOST momentum.
Fast car, Parked truck, Slow car, Fast baseball, Fast feather.
Answer:
This if from lowest to highest
Parked truckSlow car (depending on its actual speed)Fast feather (depending on how its falling)Fast baseballFast car (depends on it's mph)is the kinetic energy due to the random motion of particles in an object
Answer:
You are correct however there is also potential energy because the energy is released over a period of time.
Hope this helps!
What is the difference between magnetic stripping and magnetic field reversal?
True or false : An ion is a substance in which the atoms of two or more elements are combined in a fixed proportion
Answer:
The answer would be "True"
How many liters are in .0025 millililiters
Answer: 0.0000025 liters
i need a person i can love and not get hurt
Answer:
You'll find someone. There's a someone for everyone.
Explanation:
And I know how you feel.
A gas that occupies 50.0 liters has its volume increased to 68 liters when the pressure was changed to 3.0 ATM. What was the original pressure of the gas in ATM? In mmHg? In kPa?
Answer:
4.1 atm = 3,116 mmHg = 415.4 kPa
Explanation:
According to Boyle's law, as volume is increased the pressure of the gas is decreased. That can be expressed as:
P₁ x V₁= P₂ x V₂
Where P₁ and V₁ are the initial pressure and volume respectively, and P₂ and V₂ are final pressure and volume, respectively.
From the problem, we have:
V₁= 50.0 L
V₂= 68.0 L
P₂= 3.0 atm
Thus, we calculate the initial pressure as follows:
P₁= (P₂ x V₂)/V₁= (3.0 atm x 68.0 L)/(50.0 L)= 4.08 atm ≅ 4.1 atm
To transform to mmHg, we know that 1 atm= 760 mmHg:
4.1 atm x 760 mmHg/1 atm = 3,116 mmHg
To transform to kPa we use: 1 atm= 101.325 kPa
4.1 atm x 101.325 kPa = 415.4 kPa