rusting of steel can be prevented by coating the steel with a layer of zinc. Explain, in terms of electron transfer, why steal does not rust even if the layer of zinc is scratched so that the steal is exposed to air and water.
Answer:
Wouldn't rust because zinc will lose electrons more readily than iron and will therefore oxidize first.
Explanation:
This process whereby rusting of steel is prevented by coating the steel with a layer of zinc is known as galvanization.
Now, in this process, the steel object will be coated in a thin layer of zinc. This coating will prevent oxygen and water from reaching the underneath metal since the zinc will also act as a sacrificial metal.
Now, Zinc is used because it has a lower reduction potential than iron and thus it will get easily more oxidized than iron. Which means the zinc will lose electrons more readily than iron.
Also, since zinc has a lower reduction potential, it is therefore the more active metal. Thus, even if the zinc coating is scratched and the steel is exposed to moist air, the zinc will still get to oxidize before the iron.
PLEASE I NEED HELP!!
You find a ring with a mass of 89.2g. You fill a graduated cylinder up with 10mL of water
and put the ring into the cylinder. The water mark rises up to the 20mL mark. What is
the ring made of?
Solids
Table of Densities
Density g/cm
Solids
2.56
Copper
2.64
Gold
3.52
Platinum
Density g/cm
8.92
Marble
Quartz
19 32
Diamond
214
O Marble
Quartz
Copper
Gold
Answer:
Ring is made up off copper.
Explanation:
Given data:
Mass of ring = 89.2 g
Volume of water = 10 mL
Volume of water + ring = 20 mL
Ring is made up of = ?
Solution:
Volume of ring = (Volume of water + ring) - Volume of water
Volume of ring = 20 mL - 10 mL
Volume of ring = 10 mL
Density:
Density = mass/volume ( 1 mL = 1 cm³)
d = 89.2 g/ 10cm³
d = 8.92 g/cm³
Thus, ring is made up off copper.
What would be the volume, in liters measured at STP, of 0.56 moles of carbon monoxide?
Answer:
"This conversions relies on the fact that a mole of gas at STP has a volume of 22.4 L. It is important to note, however, that if the conditions of the gas are different this conversion will NOT work. Under those conditions you must use the ideal gas law to convert between moles and liters."
PLEASE just help me!!! Its my last question!!!!
If you add a light bulb to the circuit, the filament in the bulb will resist the flow of electrons and convert energy into_____ and ______.
Question 2 options:
light and heat
energy and matter
electrons and neutrons
electrons and protons
Answer:
Light and heat
ur welcomeeeeeeee
Answer:
Light and Heat
Give the other guy brainiest
Explanation:
Thx for the point though
What elements makeup Mars' atmosphere?
Answer:
Carbon dioxide or co^2
Explanation:
can someone answer pls
Which of the following best describes a meridian of longitude?
A line that is drawn horizontally around the earth and is parallel to the Prime Meridian.
A line that is drawn vertically down the earth and is parallel to the equator.
A line that is drawn vertically down the earth but is NOT parallel to the Prime Meridian.
A line that is drawn horizontally around the earth and is parallel to the equator.
Answer:
A line that is drawn vertically down the earth but is not parallel to the prime Meridian.
Explanation:
A line that is drawn vertically down the earth but is NOT parallel to the Prime Meridian, best describes the meridian of longitude.
What is prime meridian?Prime Meridian is an imaginary line which divides the earth into eastern and western hemispheres
What do you mean by meridian of longitude?Meridian of longitude is an imaginary semicircle that runs from north to south direction and joins the two poles. All meridians are of the same length and meet at the poles.
Hence, option 3 is the answer.
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6CO2 + 6H2O —> C6H12O6 + 6O2
If 12 moles of oxygen were produced, how many moles of carbon dioxide were used?
I'll give you guys brainliest just help, please
Answer:
12 number of moles of carbon dioxide are used.
Explanation:
Given data:
Number of moles of oxygen produced = 12 mol
Number of moles of CO₂ used = ?
Solution:
Chemical equation:
6CO₂ + 6H₂O → C₆H₁₂O₆ + 6O₂
Now we will compare the moles of oxygen with carbon dioxide.
O₂ : CO₂
6 : 6
12 : 12
Thus, 12 number of moles of carbon dioxide are used.
A substance dissolved in a liquid is a
solution
evaporation
vein
geode
An object has a momentum of 5 kg m/s and a mass of 2 kg. How fast is it moving?
Answer:
2.5 meter per second
Explanation:
momentum = mass multiplied by velocity
please mark me brainliest
Changes in either _______ or _______ can cause a change in the state of matter.
A. Temperature or Pressure
B. Temperature or Matter
C. Matter or Pressure
Answer:
A. Temperature or Pressure
Explanation:
is the scientific method is the end result of the scientific process?
Answer:
The right response will be "No".
Explanation:
Again after findings being collected, this same scientific method does not stop. The phase of the experience seems to be the compilation, examination, interpretation as well as the integration of information. The reasoning underneath research methodology has been the methodology which includes making the significance of the findings developers measured.235
234
2) Uranium is used in nuclear reactors and is a rare element on earth. Uranium has three common
isotopes. If the abundance of U is 0.01%, the abundance of U is 0.71%, and the abundance of
U is 99.28%, what is the average atomic mass of uranium?
238
Answer:
Average atomic mass of uranium = 237.97 amu
Explanation:
Given data:
Abundance of U-234 = 0.01%
Abundance of U-235 = 0.71%
Abundance of U-238 = 99.28%
Average atomic mass of uranium = ?
Solution:
Average atomic mass = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) + (abundance of 3rd isotope × its atomic mass) / 100
Average atomic mass = (234×0.01)+(235×0.71)+(238+99.28) /100
Average atomic mass = 2.34 + 166.85+23628.64 / 100
Average atomic mass = 23797.83 / 100
Average atomic mass = 237.97 amu.
A solution is made
by dissolving
29 g of sodium lithium chloride
in water to a final volume of
202 mL solution.
What is the weightweight % or percent by mass of the somute
percent by mass of the solute?
Answer:
99.3%
Explanation:
The percent by mass of the solute can be expressed as:
% mass = [tex]\frac{MassSolute}{MassSolute+MassSolvent}[/tex] * 100%And for this problem:
Mass of Solute = Mass of sodium lithium chloride = 29 gMass of Solvent = Mass of WaterSo to calculate the percent by mass first we need to calculate the mass of water, to do so we use its density (1 g/L):
202 mL is equal to (202/1000) 0.202 L.Density water = mass water / volume
1 g/L = mass water / 0.202 LMass water = 0.202 gNow we have all the data required to calculate the % mass:
% mass = [tex]\frac{29g}{29g+0.202g}[/tex] * 100 % = 99.3%Answer: 14.3
Explanation:
How many molecules are in 100 g of C6H120,?*
Answer:
3.37 × 10²³ molecules
Explanation:
Given data:
Mass of C₆H₁₂O₆ = 100 g
Number of molecules = ?
Solution:
Number of moles of C₆H₁₂O₆:
Number of moles = mass/molar mass
Number of moles = 100 g/ 180.16 g/mol
Number of moles = 0.56 mol
Number of molecules:
1 mole contain 6.022 × 10²³ molecules
0.56 mol × 6.022 × 10²³ molecules /1 mol
3.37 × 10²³ molecules
PLEASE HELP ASAP!!
Choose the reaction that would not lead to the production of hydrogen gas. a. Cu + HCl
b. Na + H2SO4
c. K + H2O
d. Zn + HCl
Answer:
the answer should be c.
Explanation:
If 6 grams of a hydrocarbon gas have a volume of
4.8 cubic decimeter, what would be the
approximate molecular mass of this gas?
A 30 grams
B 40 grams
C 20 grams
D 48 grams
Answer:
30 grams
Explanation:
I got 40 wrong so I picked 30
Answer:
30 grams
Explanation:
I did the ck12
Is Sucrose a ionic or covalent bond
Answer:
covalent bond
Explanation:
hope this helps :D
Cl2 +
NaBr
what’s this answer?!
What are the 7 diatomic elements?
Answer: Hydrogen, Nitrogen, Flourine, Oxygen, Iodine, Chlorine and Bromine
Explanation:
Except for the noble gases, nonmetals tend to have high electron affinities. What properties of nonmetals do you think are the result of this tendency?
Answer:
Nonmetals are further to the right on the periodic table, and have high ionization energies and high electron affinities, so they gain electrons relatively easily, and lose them with difficulty.
Explanation:
They also have a larger number of valence electrons, and are already close to having a complete octet of eight electrons.
Periodic table is divided as metals, non metals, noble gases and semiconductors. Among these nonmetals tend to have high electron affinities because of small size and high effective nuclear charge.
What are non metals?Non metals are the element that have property to gain electron. When any element gain electron then element attain negative charge and that element is called anion.
As we go from left to right in periodic table, the size of element decreases as number of electrons keep on adding electrons in the same shell . As the number of electrons increases, the number of proton in the nucleus also increases. Due to this, the hold of nucleus on the outermost proton increases and the size decreases. Due to this, the ionization energy increases and hence the power to gain electron increases.
Therefore, nonmetals tend to have high electron affinities because of small size and high effective nuclear charge.
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FIRST PERSON ANSWER GETS PTS, BRAINLIEST, And SUPRISE
For the reaction N2 + 3H2 - 2NH3, how many moles of nitrogen are required to produce 9.58 mol of ammonia?
Answer:
3.193 mol
Explanation:
The reaction is
[tex]N_2+3H_2\rightarrow 2NH_3[/tex]
We use the stoichiometry in order to find the moles of nitrogen required.
[tex]9.58\ \text{mol of }NH_3\times \dfrac{1\ \text{mol of }N_2}{2\ \text{mol of }NH_3}[/tex]
[tex]=3.193\ \text{mol of }N_1[/tex]
The amount of nitrogen required is 3.193 mol to produce 9.58 mol of ammonia.
Green energy may also be referred to as renewable or clean energy.
True
False
What is needed for a wind farm to be effective
Answer:
for a effective wind farm you would need wind turbines a windy area a rotation powered generator and something to use it on
Explanation:
which type of intermolecular force in water creates the surface tension that allows the stones to skip across the top of the water
Answer:
Hydrogen bonding
Explanation:
Water is a compound found readily in nature. It is made up of interatomic forces of covalent bonds that connects the hydrogen and oxygen bonds together in a definite ratio.
The intermolecular forces are responsible for the physical properties of substances. These forces allows a compound to behave in certain ways. In water, the intermolecular bonding present are the very strong hydrogen bonds. For this bond type, the hydrogen of one water molecule is firmly attached to the oxygen of another water molecule. The bonds are very strong forces.What happens when a wave hits an object?
A) the wave is reflected
B) the wave continues on
C) the wave is interfered with
D) the wave stops
Answer:
C) the wave is interfered with
Multi-Step Conversions (Always go through moles!)
Example: How many grams of water (H2O) will you need in order to have
3.22 x 1024 water molecules?
Mass of water needed : 96.3 g
Further explanationA mole is a number of particles(atoms, molecules, ions) in a substance
This refers to the atomic total of the 12 gr C-12 which is equal to 6.02.10²³, so 1 mole = 6.02.10²³ particles
Can be formulated :
N = n x No
N = number of particles
n = mol
No = 6.02.10²³ = Avogadro's number
moles H₂O=
[tex]\tt moles=\dfrac{N}{No}\\\\moles=\dfrac{3.22\times 10^{24}}{6.02\times 10^{23}}\\\\moles=5.35[/tex]
mass H₂O(MW=18 g/mol) :
[tex]\tt mass=moles\times MW\\\\mass=5.35\times 18\\\\mass=96.3~g[/tex]
how many molecules are in 9.45 moles ? ( NaNO3)
Answer:
There are 5.69*10²⁴ molecules in 9.45 moles.
Explanation:
The mole is defined as the amount of matter that particles have, that is, atoms and elementary entities.
Avogadro's Number or Avogadro's Constant is called the number of particles that make up a substance (usually atoms or molecules) and that can be found in the amount of one mole of said substance. Its value is 6.023*10²³ particles per mole and represents a quantity without an associated physical dimension. Avogadro's number applies to any substance.
Then the following rule of three can be applied: if 1 mole contains 6.023 * 10²³ molecules, 9.45 moles, how many molecules will it have?
[tex]amount of molecules=\frac{9.45 moles*6.023*10^{23}molecules }{1 mole}[/tex]
Solving:
amount of molecules= 5.69*10²⁴⁴ molecules
There are 5.69*10²⁴ molecules in 9.45 moles.
When an atom becomes a positive
ion, the radius of the atom
(1) decreases
(2) increases
(3) remains the same
Answer: When an atom becomes a positive ion it pulls it's electrons closer, decreasing it's radius moreover, when it becomes a negative ion, it pulls it's electrons closer and decreases the radius
I hope this helps :)