what ways we can prevent rusting? Explain.​

Answers

Answer 1

Answer:

By electroplating

Explanation:

The metal which requires to be protected from rust is connected to the anode while a lower metal in the series is connected to the cathode, the a complete circuit is made and current is passed through the circuit there by resulting to the coating of the metal at the anode.


Related Questions

Please help me thank you

Answers

Explanation:

increases then decreases

The sun is ____star

Answers

The sun is a star.

If you were talking about that

the sun is a Star...............

If you fill up a balloon with a small amount of air then set it in direct sunlight you'll see that the balloon expands this expansion is due to an increase in volume which results from...

Answers

Answer:  An increase in temperature in the balloon.

Explanation: due to an increase in temperature it causes a rise in kinetic energy produced in the balloon thus creating more particle collision thus resulting in expansion in the balloon.

HOPE THIS HELPSS!!!!!!!!!!!

In all cases heat flows from a hotter object to a colder object (true/false)

the correct answer will be followed by me and also be marked as the brainliest!

P.S. hv a great Sunday!​

Answers

Answer

Yes, it's true

In any case or all cases, heat always flow from the hotter object to the colder object

Answer:

In all cases heat flows from a hotter object to a colder object (true/false)

Explanation:

true

Which formula can be used to calculate the molar mass of hydrogen peroxide (H2O2)? (5 points)

Select one:
a.molar mass of H + molar mass of O
b.2 x molar mass of H + molar mass of O
c.molar mass of H + 2 x molar mass of O Incorrect
d.2 x molar mass of H + 2 x molar mass of O

Answers

answer: option d (2×molar mass of H +2×molar mass of O

In the adjoining figure, the circles with the + sign represent protons and the empty circles represent neutrons. Determine which atoms in the figure are isotopes of each other.

Answers

Answer:

2 and 3 explanation in the comments

equilibrium between two isomers a and b (a and b have the same mol. wt) is attained when there is 5% by weight A and by difference, 95% by weight of B. What is the equilibrium constant

Answers

The equili constant assuming reaction is from isomer A to isomer B; 19

i.e. A ⇄ B = 19

Given data :

% wt of A = 5

% wt of B = 95

assume the mass of mixture = 100 g

wt of A = 5% of 100 = 5 g

wt of B = 95% of 100 = 95 g

∴ mole of A = 5/M mol,  mole of B = 95/M  mol   ( where M = molar mass )

expressing the equilibrium constant

A ⇄ B  

equilibrium constant = [tex]\frac{[B]}{[A]}[/tex] = [tex]\frac{ (95/M) /V}{(5/M)/V}[/tex]  where V = volume

∴ Equilibrium constant = 19 assuming process is from A to B

hence the equilibrium constant = 19 assuming reaction process is from A to B

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Who first proposed the idea of the atom

Answers

Answer:

it's John Dalton

Explanation:

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John Dalton formulated the first modern description of it as the fundamental building block of chemical structures.

How many magnesium atoms are there in 1.25 mol of magnesium?

Answers

Answer:

1.25 x ( 6.02 × 10^23) = 7.525 × 10^23 atoms

Question 4 (1 point)

If you read a graph and saw the values of the motorcycle decreasing over time, this
graph would show a

positive correlation
positive answer
negative correlation
negative answer

Answers

From the options listed The graph would show a negative correlation  ( C )

Correlation is used to express the relationship between two or more variables.  correlation can be measured into four ( 4 ) in statistics :

Pearson correlationKendall rank correlationSpearman correlationPoint-Biserial correlation

But Generally correlation is categorized as either a positive or a negative correlation.

In a negative correlation the variables are inversely proportional to each other while in a positive correlation the variables are directly proportional to each other.

Note : an inverse proportion simply means that an increase in value of one variable = decrease in value of the other and vice versa

hence the graph would show a negative correlation given that the the values of the motorcycle decreases with increase in time.

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Answer!! 50 points
Which statement describes the properties of lanthanoids and actinoids?(1 point)

A. They are malleable and lustrous, and they tend to conduct both electricity and thermal energy.

B. They are brittle and dull, and they tend to conduct both electricity and thermal energy.

C. They are brittle and dull, and they tend to be poor conductors of both electricity and thermal energy.

D. They are malleable and lustrous, and they tend to be poor conductors of both electricity and thermal energy.

Answers

Answer:

a i j took test and c was wrong

Explanation:

Answer:

the answer is a. c is wrong

Explanation:

how to calculate the density of a substance

Answers

Answer:

DENSITY=mass/volume

Explanation:

Answer:Density, mass of a unit volume of a material substance. The formula for density is d = M/V, where d is density, M is mass, and V is volume. Density is commonly expressed in units of grams per cubic centimetre.

Explanation:

La densidad de aluminio es 2.7 g/cm3, calcula el volumen si su masa es de 300g

Ayuda please!!!!

Answers

d = m / V

Density = mass / volume

d (Density aluminio) = 2.7 g/cm³

m (mass) = 300 g

V (volume) = ?

[tex]volume = \frac{mass}{density} \\ \\ \\ v = \frac{m}{d} = \frac{300 \: g}{2.7 \: g/ {cm}^{3} } = 111.1 \: {cm}^{3} [/tex]

I hope I helped you^_^

A sealed reaction vessel initially contains 1.113×10-2 moles of water vapor and 1.490×10-2 moles of CO(g).

H20(g) +CO(g) <==> H2(g) + CO2(g)

After the above reaction has come to equilibrium, the vessel contains 8.326×10-3 moles of CO2(g).

What is the value of the equilibrium constant Kc of the reaction at the temperature of the vessel?

Answers

Answer:

Kc =[tex]\frac{[8.326x10-3]^{1} }{[1.113x10-2]^{1}[1.490x10-2]^{1} }[/tex]

Kc = 50.2059

Explanation:

1. Balance the equation

2. Use the Kc formula

Remember that pure substances, like H2 are not included on the Kc formula

The value of the equilibrium constant Kc of the reaction at the temperature of the vessel is 0.05.

Calculation,

The balanced chemical equation is given as,

                      [tex]2H_{2}O[/tex]             +         [tex]2CO[/tex]            →            [tex]2H_{2}[/tex]       +     [tex]2CO_{2}[/tex]

At t=0          1.113×[tex]10^{-2}[/tex]                 1.490×[tex]10^{-2}[/tex]                                         0

At [tex]t=t_{eq}[/tex] 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]   1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]            8.326×[tex]10^{-3}[/tex]  

The number of moles of [tex]H_{2}O[/tex] at equilibrium  =  1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]

The number of moles of [tex]CO[/tex] at equilibrium  = 1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex]

The number of moles of  [tex]CO_{2}[/tex]   at equilibrium =   8.326×[tex]10^{-3}[/tex]  

What is equilibrium constant?

Equilibrium constant is calculated bt ratio of product of concentration of reactant by product.

K = [tex][H_{2}O]^{2}[/tex]×[tex][CO]^{2}[/tex]/[tex][CO_{2}]^{2}[/tex]

K =( 1.113×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex] )∧2× (1.490×[tex]10^{-2}[/tex]-8.326×[tex]10^{-3}[/tex])∧2/(8.326×[tex]10^{-3}[/tex])∧2

K = 0.049 ≈ 0.05

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Water can act as both an acid and a base in an ionization reaction to form (H) and OH ions.
What is this phenomenon called?

Answers

amphoterism. amphoteric substance is a substance/compound that can act as both acid and base

All of the following are examples of simple tools except:

A.magnifying glass

B.space telescope

C.pulley

D.lever

Answers

Answer:

space telescope I assume

Explanation:

all other tools can be made and used very easily but a telescope took years and years to invent

PLS HELP Quick!!!!!!!!! ​

Answers

Answer:

Bailee is incorrect. The mass of objects stay the same but the weight will change.

Explanation:

Mass is how much space something takes up, so that wouldn't change on the moon. The weight however would change because the gravitational pull on the earth is different from that on the moon.

I hope this helps!

Bailee explained that when traveling to the moon. The statement of Bailee is incorrect. The mass of the objects stays the same, but the weight will change. The correct option is B.

What is gravity?

Gravity is a force that pulls all objects towards itself. It is present on the earth and in the galaxy. Gravity is the cause of all planets, and the sun and the moon stay in their own places.

The weight of items on the moon is equal to their weight on Earth, according to Bailee, thus he needs only bring a small amount of luggage. The mass is the quantity of matter. The mass never changes, only the weight changes of an object when they are on different planets.

Thus, the correct option is B. The mass of the objects stays the same, but the weight will change.

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1.
2 Explain the meaning of each of the following
terms. In your answer include an example to help
with your explanation.
a Expansion.
d Sublimation.
b Contraction.
e Diffusion.
c Physical change. f Random motion.
a Nar
b Na
c Na
sol
d De
so

Answers

Answer:

a. Expansion: the spatial dilation of a material that occurs upon changes in its composition. (an increase in number or amount to become larger in size.)

E.g- in a thermometer, when it gets hotter, the liquid inside them expands and rises up the tube.

b. Sublimation: the process in which a solid changes directly into a liquid.

E.g- dry ice, solid iodine and ammonium salts.

when the above solids are heated, only particles which are found on the surface of the solid have enough energy to break all forces of attraction and form a gas.

c. Contraction: it is the opposite of expansion. when a liquid is cooled the particles slow down and contract.

E.g- when a thermometer is taken out of your mouth, it contracts and the liquid inside falls back to the bottom.

f. Random Motion: motion in which the particle moves in a zig-zag manner and not in a straight line. The kinetic particle theory states that matter is made up of particles which are in constant random motion,

                     

Explanation:

In the coordination compound [Pt(NH 3) 2Cl 2], the coordination number and oxidation number of the central atom are ________ and ________, respectively.

Answers

central atom is Pt
coordination number is 4 because there are 4 things that is attached/coordinated to the central atom Pt (2 NH3 molecule, 2 Cl- ion)

oxidation number is +2

Nonmetallic materials that are strong, brittle, resistant to heat and attack by chemicals, and are typically made from clay are known as:________

Answers

nonmetallic materials following that description is ceramics

what is seed reproduction​

Answers

Answer:

A seed is formed when fertilised ovule divides by mitosis. ... The ovary of the flower develops into the fruit while ovules develop into seeds. The formation of seed completes the process of reproduction in plants. Within the seed, the growing embryo develops and matures.

I hopes it helps you.

50 points!!!
Please help me

Answers

30. mixture of compounds
31. compound
32. element
33. compound
34. compound
34. mixture of elements and compounds

When 0.60 mol NH 3 is decomposed in a 1 Liter flask at 850 K, the equilibrium concentration of NH3 is measured as 0.12 M. Given that ammonia decomposes according to the reaction
2 NH3(g) ⇌ N2(g) + 3 H2(g),
what is Kc for the reaction?
a. 0.16
b. 12.00
c. 1.44
d. 6.22
e. 0.75

Answers

Answer:

in a 1 Liter flask at 850 K, the equilibrium concentration of NH3 is measured as 0.12 M. Given that ammonia decomposes according to the reaction

2 NH3(g) ⇌ N2(g) + 3 H2(g),

what is Kc for the reaction?

a. 0.16

b. 12.00

c. 1.44

d. 6.22

e. 0.75

The response is 12.00 (b). Using the equation Kc = [N2][H2]3/[NH3]2, we can find the equilibrium constant Kc for the reaction 2 NH3(g) N2(g) + 3 H2(g).

What is the equilibrium concentration ?

In this instance, the capacity of the flask is 1 litre, and the equilibrium concentration of NH3 is 0.12 M. Therefore, using the reaction's stoichiometry, it is possible to determine the equilibrium concentrations of N2 and H2.

Since 2 moles of NH3 break down into 1 mole of N2 and 3 moles of H2, the equilibrium concentrations of N2 and H2 are 0.06 M and 0.18 M, respectively. As a result, the equilibrium constant Kc = [N2][H2]3/[NH3]2 = (0.06)(0.18)3/0.122 = 12.00 may be computed.

Therefore, b. 12.00 is the right response. You should be aware that the equilibrium constant Kc is a value that is temperature-dependent and is only applicable at the specified temperature. As a result, Kc will have a varied value depending on the temperature. The temperature in this instance is 850 K, and the Kc value is 12.00.  

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What is 47.35 dL= mL?

Answers

Answer:

4.735 litres

Explanation:

10 dL = 1 litre

47.35 dL = 47.35/10 = 4.735 litres

11) Calcium Chloride, CaCl2, can be used instead of road salt to melt the ice on roads during the winter. To determine how much calcium chloride had been used on a nearby road, a student took a sample of slush to analyze. The sample had a mass of 23.47g. When the solution was evaporated, the residue had a mass of 4.58g (assume that no other solutes were present).
a) What was the mass/mass percent of calcium chloride in the slush
b) How many grams of calcium chloride were present in 100g solution?​

Answers

Answer:

What is that? I do not understand

Which of the following
best describes the cell
wall of a plant cell?
A. sturdy
B. unstable
C. flimsy
D. weak

Answers

I would say sturdy.

Answer:

A. Sturdy

Explanation:

Unlike every other answer, the cell wall is the part of the cell that acts as a strong barrier of the cell. In this case, it is sturdy.

A radioactive sample is placed in a closed container. Two days later only one-quarter of the sample is still radioactive. What is the half-life of this sample?

Answers

Answer:

2

Explanation:

The sample has halved twice.

1/2 of 1/2 is 1/4, and 1/2 of 1 is 1/2.

Define the terms octet rule.​

Answers

Answer:

The octet rule is a chemical rule of thumb that reflects the theory that main-group elements tend to bond in such a way that each atom has eight electrons in its valence shell, giving it the same electronic configuration as a noble gas.

A student in a lab holds an iron nail over an open flame, and no reaction occurs. The nail is then filed, creating small pieces of iron shavings. These pieces burn brightly when placed over an open flame.

Which statement accurately identifies one of the changes that occurs as a physical or chemical change?

A. Filing the nail is a chemical change because the composition of the material does not change but the general appearance of the iron does change.

B. Burning the iron filings is a chemical change because the composition of the material does not change but the general appearance of the iron does change.


C. Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.


D. Burning the iron filings is a physical change because the composition of the material does not change but the general appearance of the iron does change.

Answers

Answer:

A - Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change.

Explanation

yeah its just the right answer

The following statement accurately identifies one of the changes that occurs as a physical or chemical change;  "Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change."

The most important aspect of chemical change is that  the composition of a substance changes when the substance undergoes a chemical change. This is not the case when the substance undergoes a physical change.

After a physical change, the form, size or appearance may change but never in composition.

Hence the appropriate answer is;  "Filing the nail is a physical change because the composition of the material does not change but the general appearance of the iron does change."

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1. How many pounds does 2.00 kg weigh?​

Answers

I think is 4.41 the answer of your question

Answer: 4.4lb

Explanation:

Other Questions
Will Mark Brainliest, PLS HELP! Use the image below to answer the question.The illustration shows the mitochondrial intermembrane space. Molecules enter and exit enzymes. Molecule upper N upper A upper D upper H passes through enzyme upper N upper A upper D upper H Reductase releasing upper H superscript + baseline and upper N upper A upper D superscript + baseline. A blue arrow starts at upper N upper A upper D superscript + and goes through enzyme Ubiquinone then enzyme Cytochrome Reductase, an upper H superscript + baseline is released. The arrow continues through enzyme Cytochrome c and enzyme Cytochrome Oxydase, another upper H superscript + baseline is released. The formula 2 upper H + one-half upper O subscript 2 baseline is to the left of enzyme Cytochrome oxydase with an arrow pointing to the other side. The arrow meets with the arrow from upper N upper A upper D superscript + baseline at upper H subscript 2 baseline upper O. To the right is upper A upper T upper P synthase, upper A upper D upper P + upper P subscript 1 baseline have an arrow going under upper A upper T upper P synthase, an upper H superscript + baseline arrow points to the arrow, the result is upper A upper T upper P.Which step of cellular respiration is shown in the image?glycolysislactic acid fermentationelectron transport chainKrebs cycle It's geometry I need help (2.5*10^3)*3.4*10^2 (in scientific notation) 5. What is dependence? A pair of equations is shown below. x + y = 2y = one halfx + 5 If the two equations are graphed, at what point do the lines representing the two equations intersect? refer to image given and please answer!!!!! Imagine that someone offered you a choice: You could spend four years studying at the world's best university, but you would have to keep your attendance there a secret. Or you could be awarded an official degree from the world's best university, but you couldn't actually attend. Obtaining the degree and not attending the university would enh how do you define peace culture? Find the sum.1/xy^2 + x^2/y Please Help!!!! Due today will give brainliest rewrite thefollowing sentence using the expression containing the verbmettre.Je me suis fch please help!!! the question is in the picture above this is geometry someone help please!!!! Will give brainliest! Simplify 6 2 3 - 6 2 - 3Thanks! help fast...................... Cecil Rhodes never did complete his railroad between Cairo, Egypt, and Cape Town, South Africa. Approximately how long would his railroad have been if completed?2,100 miles4,500 miles500 miles12,000 miles Evaluate the expression (-243)^2/5 It takes Serina 0.25 hours to drive to school. Her route is 16 km long. What is Serinas average speed on her drive to school? plz help me do this branniest to whoever right Please help! Your answer will be appreciated!!