The evidence indicate that the reaction has occurred between ions i.e, change of state of the reactants, e.g. precipitation.
What is Precipitation ?In an aqueous solution, precipitation is the process of transforming a dissolved substance into an insoluble solid from a super-saturated solution.
The reaction of the ions can be checked by a number of methods.
In a chemical reaction, the ions are in the acqeuos solution which means that they are in solution, dissolved with charge.
During the reaction (ionic) there is an attraction between the positive and negative ions.
This makes a change in the state of the reactants in the products.
In addition, the reaction can result in an immediate observable change such as the formation of a solid or precipitation.
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How much percent of shops are in the city? How about in the country?
HELP PLS WILL GIVE BRAINLY FAST
Answer:
I would say there would be 5-10% in a city, and maybe 10-20% in the country. It mainly varies depending on how big the city is, how many people/districts there are, and the size of the country, which makes it hard to give a certain percent of shops, as there may be small businesses included as well or new shops being built.
Hope this helps! This was pretty confusing for me as well so i hope the answer is alright (×﹏×)
PLEASE answer ASP.
How is the strength of an electrostatic force determined?
Answer:
Explanation:The ratio of Coulomb force to gravitational force for an electron and a proton is given as,
r
1
=
R
2
Gm
1
m
2
4πε
0
1
×
R
2
q
1
q
2
=
6.67×10
−11
×9.1×10
−31
×1.67×10
−27
9×10
9
×(1.6×10
−19
)×(1.6×10
−19
)
=
1
2.27×10
39
The ratio of Coulomb force to gravitational force for two protons is given as,
r
2
=
R
2
Gm
2
4πε
0
1
×
R
2
q
1
q
2
=
6.67×10
−11
×(1.67×10
−27
)
2
9×10
9
×(1.6×10
−19
)×(1.6×10
−19
)
=
1
1.24×10
36
(b)
The magnitude of Coulomb force between electron and proton is given as,
F=
4πε
0
1
×
R
2
q
1
q
2
=
(10
−10
)
2
9×10
9
×(1.6×10
−19
)×(1.6×10
−19
)
=2.304×10
−8
N
The acceleration of electron is given as,
a
1
=
m
1
F
=
9.1×10
−31
2.304×10
−8
=2.5×10
22
m/s
2
The acceleration of proton is given as,
a
2
=
m
2
F
=
1.67×10
−27
2.304×10
−8
=1.4×10
19
m/s
2
Aluminum oxide reacts with lithium metal. What is the coefficient for lithium when the equation is balanced?
Answer:
The Coefficient is 1
Explanation:
Oxygan is an example of a(n)
Oxygen is an example of a diatomic element.
What is the theoretical yield of NaBr
when 2.36 moles of FeBr3 reacts?
2FeBr3 + 3Na2S → Fе₂S3 + 6NaBr
[?] mol NaBr
Round your answer to the hundredths place
The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles
Balanced equation2FeBr₃ + 3Na₂S → Fе₂S₃ + 6NaBr
From the balanced equation above,
2 moles FeBr₃ reacted to produce 6 moles of NaBr
How to determine the theoretical yield of NaBrFrom the balanced equation above,
2 moles FeBr₃ reacted to produce 6 moles of NaBr
Therefore,
2.36 moles FeBr₃ will react to produce = (2.36 × 6) / 2 = 7.08 moles of NaBr
Therefore,
Thus, the theoretical yield of NaBr is 7.08 moles
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Answer:
7.08
Explanation:
What are two ways in which the safe house of lean might influence a product owner?
The safe house of lean might influence a product owner to provide better customer service.
What is the main purpose of safe house of lean?The safe house of lean is designed to provide ultimate value to the customer one the shortest possible time.
Employing the safe house of lean might influence the product owner in the following two ways:
enable the product ownerr work together with Agile Teams to develop stories with clear acceptance criteria.assist Agile Teams gain a clear understanding of their customers and how best to serve them.Therefore, the safe house of lean might influence a product owner to provide better customer service.
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write the transitional metals and their electronic configuration
Answer:
yo no se nada
Explanation:
solo se que no se nada xd
Explain the large variation in boiling temperatures, given the small range in Me values.
Answer:
32.0 is the answer which is divide able to 65 or -85
b) Explain what happens when a drop of concentrated sugar solution is placed on a rheo leaf peel mounted on a glass slide. Name this phenomenon. Would the same happen if the rheo leaf was boiled before mounting? Give reason for your answer
The rheo leaf peel will lose water by osmosis and become flaccid. If the rheo leaf was boiled, this would not happen.
What is osmosis?Across living membranes, water moves from a region of high to a region of low water potential.
Concentrated sugar solutions have low water potential when compared to the cell sap of the cells of rheo leaf peel. Thus, water will move from the rheo leaf peel to the sugar solution.
This will result in the wilting of the leaf peel.
If the leaf peel is boiled, the membranes in the cells die and can no longer function as a selectively permeable interface.
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What is the complete ionic equation for NaOH(aq) + HCl(aq) → H₂O()) + NaCl(aq)?
Answer:
OH-(aq)+H+(aq)->H2O(l)
Answer is shown in photo.
Explanation :
APEX
What is the change in
temperature when water goes
from 65.0 °C to 25.0 °C?
AT = [?] °C
Answer:
-40.0 °C
Explanation:
Change in temperature can be written as [tex]\displaystyle{\Delta T = T_2-T_1}[/tex]. The variables are defined below here:
[tex]\displaystyle{\Delta T}[/tex] means change in temperature.
[tex]\displaystyle{T_2}[/tex] means the final temperature value.
[tex]\displaystyle{T_1}[/tex] means the initial temperature value.
From the question, we know the temperature changes from 65.0 °C to 25.0 °C. Therefore, our initial temperature is 65.0 °C and final temperature is 25.0 °C.
Hence:
[tex]\displaystyle{\Delta T=25.0-65.0}\\\\\displaystyle{\Delta T = -40.0}[/tex]
Therefore, the change in temperature is -40.0 °C.
60 ml of a 1.0 m solution of h2so4 is mixed with distilled water to make 1 l of solution. what is the molarity
Answer:
0.057 M
Explanation:
To find the new molarity, you need to (1) find the moles (via the molarity equation using the old molarity and volume) and then (2) calculate the new molarity (via the molarity equation using the combined volume and old moles).
(Step 1)
60 mL / 1,000 = 0.06 L
Molarity (M) = moles / volume (L)
1.0 M = moles / 0.06 L
(1.0 M) x (0.06 L) = moles
0.06 = moles
(Step 2)
0.06 L + 1 L = 1.06 L
Molarity (M) = moles / volume (L)
Molarity = 0.06 moles / 1.06 L
Molarity = 0.057 M
What is the oxidation state of Hg in Hg2Cl₂?
O A. +1
OB. -1
O C. +2
OD. -2
Answer:
+1
Explanation:
The oxidation state of Hg in Hg2Cl2 is +1. It has +1 state. 0=2Hg +2 (-1) Hg=+1. Mercury chloride (HgCl2) is considered as the dominant form of mercury in coal combustion flue gas. The oxidation state of an atom is the charge of this atom after ionic approximation of its heteronuclear bonds. The oxidation number is synonymous with the oxidation state. Determining oxidation numbers from the Lewis structure (Figure 1a) is even easier than deducing it from the molecular formula (Figure 1b). The oxidation number of each atom can be calculated by subtracting the sum of lone pairs and electrons it gains from bonds from the number of valence electrons. Bonds between atoms of the same element (homonuclear bonds) are always divided equally. When dealing with organic compounds and formulas with multiple atoms of the same element, it's easier to work with molecular formulas and average oxidation numbers (Figure 1d). Organic compounds can be written in such a way that anything that doesn't change before the first C-C bond is replaced with the abbreviation R (Figure 1c). Unlike radicals in organic molecules, R cannot be hydrogen. Since the electrons between two carbon atoms are evenly spread, the R group does not change the oxidation number of the carbon atom it's attached to.
source: www.chegg.com
Answer: O A. +1
Explanation: i took the test
There are 164 g H3PO3 formed during a
reaction. How many moles of H₂O are
required? (H3PO3: 82 g/mol)
Answer:
13448
Explanation:
i think im wrong but
164(82)=13448
it's 82g/mol) for this question
Which particles that make up an atom are involved in nuclear reactions?.
3. Which nuclear radiation is similar to high energy X-rays?
beta
alpha
gamma
neutron
Answer: Gamma radiation
Explanation:
Gamma rays have high penetrating power, similar to high-energy X-rays.
compare the properties of physical and chemical change with the help of an example.
Explanation:
For physical change(1)It is easily reversable, example: the melting of ice.
(2)It produces no new substance example: all cases of melting of solid to liquid.
(3) There is no change in the mass of the substance
example: the magnetization of iron.
For chemical change(1)It is not easily reversable, example: all cases of burning.
(2) new substance are produced example: rusting of iron.
(3) There is change in the mass of the substance, example : slaking of lime.
the physical matter of which living or non living things are composed is called a
The physical matter of which living or non living things are composed is called a molecule
What is a molecule?A molecule is the smallest particle of an element or a compound which can normally exist alone and still retain the properties of that substance.
A molecule could be made up of an atom of an element of different atoms of elements such as:
HydrogenOxygenCarbonSodiumPotassiumMagnesiumSo therefore, the physical matter of which living or non living things are composed is called a molecule.
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Describe graham's law.
hydrogen chloride gas (hcl) diffuses 1.8 times faster than an unknown gas. determine the molar mass of the unknown gas. show your work or explain your answer, giving specific values used to determine the answer.
The molar mass of gas is 6.48 g/mol
What is the statement of Graham's law?Graham's law of diffusion states that the rate of diffusion of a gas is inversely proportional to the density of the gas.
The molar mass of Hydrogen gas = 2
R2/R1 = 1.8
Molar mass of gas = 2 × 1.8 × 1.8
Molar mass of gas = 6.48 g/mol
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Use the References to access important values if needed for this question. The Pauli Exclusion Principle tells us that no two electrons in an atom can have the same four quantum numbers. For each of the orbitals below list a set of possible quantum numbers. Give only one value for each Orbital ... n ... ... l ... ... ml ... ... ms ... 1s fill in the blank 4 There are a total of values possible for ml 3s
The quantum numbers are used to describe the position of an electron in atom.
What are quantum numbers?The quantum numbers are used to describe the position of an electron in atom. I have attached a picture that shows the complete question.
For the 1s orbital;
n =1
l = 0
ml = 0
ms = ±1/2
For the 2s orbital;
n = 2
l = 1
ml = -1, 0, 1
ms = ±1/2
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which sugar is called milk sugar
Answer:
Lactose is called milk sugar.
Explanation:
Hope It Helps!!!
Answer:
lactose
Explanation:
credits to the answer above !
How many hydrogen bonds will be found within an alpha helix that is 18 amino acids long?.
An alpha helix which is 18 amino acids long will have 12 hydrogen bonds.
What is alpha helix (α-helix) ?The alpha helix (α-helix) is a common in the secondary structure of proteins and is a right hand-helix conformation in which every backbone N−H group hydrogen bonds to the backbone C=O. group of the amino acid located four residues earlier along the protein sequence.
The alpha helix is stabilized by hydrogen bonds (shown as dashed lines) from the carbonyl oxygen of one amino acid to the amino group of a second amino acid.
Because the amino acids connected by each hydrogen bond are four apart in the primary sequence, these main chain hydrogen bonds are called "n to n+4.
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How many moles of electrons are transferred when 2.0 moles of aluminum metal react with excess copper(II) nitrate in aqueous solution to form Al(NO3)3(aq) and Cu(s)
Moles of electrons:
The moles of electrons that are transferred are 12F
A balanced equation:
2 moles of Aluminium metal react with excess copper(II) nitrate.
[tex]2Al + 3Cu{(NO_3)}_2 \rightarrow 2Al{(NO_3)}_3 +3 Cu[/tex]
Given:
Moles of Aluminium = 2
As Aluminium goes from 0 to +3 oxidation state
[tex]Al \rightarrow Al^{3+} + 3e^-[/tex]
And copper goes from +2 to 0
[tex]Cu^{2+} + 2e^-\rightarrow Cu[/tex]
On balancing the number of electrons we get:
For 1 mole of Al [tex]6e^-[/tex] is required.
Therefore for 2 moles of Al,
Total [tex](2\times6)[/tex]F mole of electrons
Where F= Faraday's constant= 96500 C
So, 12F moles of electrons are transferred.
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Which of the following choices is NOT a consequence of incomplete combustion?
A. Carbon monoxide blocking oxygen in the blood.
B. Heavy metals leaking into groundwater and damaging the nervous system.
C. Carbon particles causing breathing problems.
D. Carbon particles making buildings dirty.
Carbon monoxide blocks oxygen in the blood. Hence, option A is correct.
What is combustion?Combustion is a chemical process or a reaction between Fuel (Hydrocarbon) and Oxygen.
During incomplete combustion part of the carbon is not completely oxidized producing carbon monoxide (CO). Incomplete combustion uses fuel inefficiently and carbon monoxide is released.
Carbon monoxide gas diffuses rapidly across the pulmonary capillary membrane, binding to haemoglobin with an affinity 200 times that of oxygen to form carboxyhemoglobin. By displacing oxygen, CO decreases the oxygen-carrying capacity and oxygen delivery to tissues, causing marked cellular hypoxia and acidosis.
Hence, option A is correct.
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. You need to prepare 755ml of a 3.50M solution of sodium hydroxide solution. If
the original solution had a molarity of 20.0M how much should you take out to
make the diluted solution?
M₁V₁=M₂V₂
20 x V₁ = 3.5 x 755
V₁ = 132.125 ml
find the relative atomic mass
Answer:
atomic mass = 16 amu
Explanation:
The atomic mass is the total protons and neutrons in an element. The atomic number represents the total number of protons.
In this form, the superscript (raised exponent) represents the mass number/atomic mass. The subscript represents the atomic number. Therefore, if the number (16) is the superscript, this must be your answer.
¹⁶₈Z
-----> 16 = mass number/ atomic mass
-----> 8 = atomic number
In What season of Breaking Bad did the character Walter White die.
Answer:
Season 5 lol
Explanation:
Answer:
season 1
Explanation:
the man was shot rip
What makes a compound an acid?
a. It dissolves into Hydrogen ions in water (H+ and H3O+)
b. It has a pH higher than 7
c. It dissolves into Hydroxide ions in water (OH-)
d. It cannot be mixed with oil
Which of the following is NOT an example of combustion occurring?
A. A car engine
B. A rocket lifting off
C. Battery acid burning the floor
D. A bonfire
Answer:
C. Battery acid burning the floor
Explanation:
C. Battery acid burning the floor
in combustion fire is created
Battery acid burning the floor is NOT an example of combustion occurring.
The answer is option C.
What is combustion?Combustion is a chemical process or a reaction between the gas (Hydrocarbon) and Oxygen. while gasoline and oxygen react it releases warmth and light energy. heat and light energy then result in the flame. So, the system for Combustion reaction is Hydrobcarbon + Oxygen = warmness electricity.
Combustion in daily existence examples is: Burning of wooden or Coal for the family functions. Burning of Petrol or Diesel for using vehicles like vehicles. Combustion of herbal gas or LPG.
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12.11 liters of gas at atmospheric pressure is compressed into a 0.669 L gas cylinder. What is the pressure (mm Hg) of the compressed gas if its temperature remains constant?
a. 1.38e4
b. 42.0
c. 93.8
d. 18.1
Answer:
a. [tex]P_2=1.38*10^4[mmHg][/tex]
Explanation:
If the Temperature of a gas remains constant (and if the amount of gas molecules doesn't change), then compressing the gas from 12.11 L to 0.669L will increase its pressure through Boyle's Law: [tex]P_1V_1=P_2V_2[/tex]
We'll also need to recall that atmospheric pressure with units of mmHg (since that is the unit requested in the answer) is 760 mmHg.
Letting the initial Pressure and Volume be the P1 and V1, and the final pressure be the P2 and V2, we can substitute and solve:
[tex]P_1V_1=P_2V_2[/tex]
[tex](760[mmHg])(12.11[L])=P_2(0.669[L])[/tex]
[tex]\dfrac{(760[mmHg])(12.11[L \!\!\!\!-])}{0.669[L \!\!\!\!-]}=\dfrac{P_2(0.669[L]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----})}{0.669[L]\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!\!{----}}[/tex]
[tex]13757.2496[mmHg]=P_2[/tex]
Since the final pressure is only measured to 3 significant figures, we round the pressure accordingly
[tex]13800[mmHg]=P_2[/tex]
Note that in scientific notation, this is [tex]P_2=1.38*10^4[mmHg][/tex], occasionally written as [tex]1.38\text{E}4[mmHg][/tex]