Please help answer ASAP

How does this evidence indicate that the reaction has occurred between ions? Be specific and explain why the meter readings change throughout the experiment.

Answers

Answer 1

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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Related Questions

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)

Answers

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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3. Which nuclear radiation is similar to high energy X-rays?
beta
alpha
gamma
neutron

Answers

Answer: Gamma radiation

Explanation:

Gamma rays have high penetrating power, similar to high-energy X-rays.

How much percent of shops are in the city? How about in the country?

HELP PLS WILL GIVE BRAINLY FAST

Answers

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 (×﹏×)

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

Answers

A. Dissolves into hydrogen ions in water

We know is B is wrong because pH higher than 7 is basic and not acidic

C is wrong because having more OH is basic which makes the compound a base rather than acid

Although D is also correct, the most likely answer is A

write the transitional metals and their electronic configuration​

Answers

Answer:

yo no se nada

Explanation:

solo se que no se nada xd

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.

Answers

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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Oxygan is an example of a(n)

Answers

Oxygen is an example of a diatomic element.

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

Answers

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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find the relative atomic mass​

Answers

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

What are two ways in which the safe house of lean might influence a product owner?

Answers

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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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

Answers

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]

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

Answers

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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In What season of Breaking Bad did the character Walter White die.

Answers

Answer:

Season 5 lol

Explanation:

Answer:

season 1

Explanation:

the man was shot rip

What is the oxidation state of Hg in Hg2Cl₂?
O A. +1
OB. -1
O C. +2
OD. -2

Answers

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

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

Answers

The theoretical yield of NaBr given that 2.36 moles of FeBr₃ reacts is 7.08 moles

Balanced equation

2FeBr₃ + 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 NaBr

From 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:

Which particles that make up an atom are involved in nuclear reactions?.

Answers

Basically nuclear reactions need to involve protons and neutrons and changes in them. So it should be particles within the nucleus. Aka protons and neutrons.

There are 164 g H3PO3 formed during a
reaction. How many moles of H₂O are
required? (H3PO3: 82 g/mol)

Answers

Answer:

13448

Explanation:

i think im wrong but

164(82)=13448

it's 82g/mol) for this question

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.

Answers

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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which sugar is called milk sugar

Answers

Answer:

Lactose is called milk sugar.

Explanation:

Hope It Helps!!!

Answer:

lactose

Explanation:

credits to the answer above !

the physical matter of which living or non living things are composed is called a

Answers

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:

HydrogenOxygenCarbonSodiumPotassiumMagnesium

So therefore, the physical matter of which living or non living things are composed is called a molecule.

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PLEASE answer ASP.
How is the strength of an electrostatic force determined?

Answers

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

Explain the large variation in boiling temperatures, given the small range in Me values.

Answers

Answer:

32.0 is the answer which is divide able to 65 or -85

What is the change in
temperature when water goes
from 65.0 °C to 25.0 °C?
AT = [?] °C

Answers

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.

How many hydrogen bonds will be found within an alpha helix that is 18 amino acids long?.

Answers

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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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

Answers

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 complete ionic equation for NaOH(aq) + HCl(aq) → H₂O()) + NaCl(aq)?

Answers

Answer:

OH-(aq)+H+(aq)->H2O(l)

Answer is shown in photo.

Explanation :

APEX

Aluminum oxide reacts with lithium metal. What is the coefficient for lithium when the equation is balanced?

Answers

Answer:

The Coefficient is 1

Explanation:

. 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?

Answers

M₁V₁=M₂V₂

20 x V₁ = 3.5 x 755

V₁ = 132.125 ml

compare the properties of physical and chemical change with the help of an example.​

Answers

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.

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

Answers

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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Write an equation for a polynomial with all the following features:a. The degree is 5. b. The polynomial has 4 terms.c. The graph of the polynomial crosses the vertical axis at y = 12.2. Identify the approximate input values of any relative maximums and minimums ofthis 5th degree polynomial. Sorrel is scared of darkness. Find the abstract noun and collective noun Which best defines plagiarism? 1) Two students are making their way to school. One has a bike and the otheris on foot. If the student on foot is going at a speed of 3 m/s and they makeit to school in 30 s, how far away was the school? How do I solve this problem? Which phrase from the proposal is an example of hyperbole? a. i again subtract fifty thousand [babies), for those women who miscarry, or whose children die by accident or disease within the year. b. [m]others instead of being able to work for their honest livelihood, are forced to employ all their time in strolling to beg sustenance for their helpless infants. c. (from which number i subtract thirty thousand couple, who are able to maintain their own children, (although i apprehend there cannot be so many, under the present distresses of the kingdom) d. some persons of a desponding spirit are in great concern about that vast number of poor people, who are aged, diseased, or maimed it is very well known, that they are every day dying. as fast as can be reasonably expected. 3. A sequence of numbers is shown below. 1 5 9 13 17.(a) Find an expression for the nth term of the sequence. A company purchased new equipment for $52,000. The company paid cash for the equipment. Other costs associated with the equipment were: transportation costs, $2,600; sales tax paid $2,900; and installation cost, $3,100. The cost recorded for the equipment was: The sum of two numbers is 48. If one number is three more than twice the second number, which of the following is thesmaller number?O 24O 15O 30O 33 Why was the United States reluctant to accept Jewish refugees? Check all that apply. Even though it's not very popular these days, I like our system . Getting together to talk about who the best candidate might be makes me feel like we're really part of democracy. After the debate, we vote. In my state, any voter can participate. It's all pretty informal. What system for selecting party nominees does the passage describe? . Mixed primary B. Caucus C. Open primary . Closed primary Scientists want to track the wind speeds and precipitation for a hurricane that will affect the entire East Coast of the United States. Which weather equipment would be best to measure the impact of the storm for this entire region?A. an anemometerB. a rain gaugeC. Doppler RadarD. global positioning system (GPS) Are the equations -11(x-2)=8 and x-2=8+11 equivalent? Six day old Talee has been breast fed and is presented with two nursing pads. One is soaked with her mother's breast milk, and the other is freshly cleaned. Talee will MOST likely: Activity 1.3 Put an unlit incense stick in a corner of your class. How close do you have to go near it so as to get its smell? Now light the incense stick. What happens? Do you get the smell sitting at a distance? Record your observations. 7.0 mol Mn reacts with 5.0 molO2 according to the equation below:2Mn + O 2MnOHow many moles of MnO form from5.0 mol Mn?[?] mol MnORound your answer to the tenths place. A car is moving with constant velocity of 30m/s what is it's acceleration in 10s what is the median \66, 51, 77, 68, 60, 75, 54, 80 What concept is used to derivatively classify the statement in the new document?. Calculate the genotypic and phenotypic ratios for the following crosses in peas for height, determined by the T gene. (T is Tall; t is short.)homozygous dominant crossed with homozygous recessivehomozygous dominant crossed with heterozygoushomozygous recessive crossed with heterozygousheterozygous crossed with heterozygouswill give thanks and brainliest