Answers
Answer:
I don't know the answers of chemistry if you have an entrance question of maths so I can
[tex]\rule{2000pt}{1000000pt}[/tex]
Related Questions
4. The new element Plainsmenium (Pe) was discovered in 2005 by Monte E. Rey
(who will receive his Nobel Prize in Chemistry in the year 2012). It has
three isotopes: Pe-184 (24.60%), Pe-185 (11.20%), and Pe-188 (64.20%).
What is its average atomic mass?
Answers
This is my answer
Explanation:
p=m/v
where:. p=density
m=mass
v=volume
p=F/A = Lim ∆F / ∆A
1 ATM=14.7 psi
= 1.013x10⁶ d/cm²
1 bar=10⁶ d/cm²
=10⁵ N/m2
Hope it helps to you goodluck
I'm not sure but that's the answer of my notebook like my answer please
The covalent compounds are soluble in:
a) All acids
b) All bases
c) all solvents
d) nonpolar solvents
Answers
Answer:
d) Non-polar solvents
Which of the following statements are true about energy and bonds?
Check all that apply.
A. The formation of bonds does not absorb or release energy.
B. When bonds are formed, energy is released.
C. Energy is absorbed to break bonds.
D. Breaking bonds does not absorb or release energy.
Answers
Answer:
A. Energy is necessary for bond formation.
C. Breaking bonds takes energy.
D. When bonds are formed, energy is released.
Energy is always required for bond formation because when a chemical reaction occurs, either molecular bonds are broken or other bonds are formed to make different molecules. Energy is released during bond formation and is an exothermic process because bond formation represents a stable configuration and the energy lost is released as heat energy that makes it more stable. Breaking bonds takes energy and is an endothermic reaction because energy is absorbed to break bonds.
Hope that helps. x
The stage in which the hair begins to destroy itself as it disconnects from the
papilla is called?
Answers
Which charge does iron (Fe) have in iron sulfate (FeSO4)?
A) -1
B) +2
C) -2
D)+2
Answers
The charge on iron (Fe) in iron sulfate (FeSO₄) is equal to +2. Therefore, option (D) is correct.
What are the ionic charges?The ionic charge can be described as the oxidation number of the chemical species. The cation carries a positive ionic charge while Anion carries a negative ionic charge. The number of electrons gained or lost by an atom decides the charge carried by ions.
In the modern periodic table, the elements placed on the left side are electropositive and act as metals because they can donate one or more electrons. The elements placed on the right side are electronegative as they can accept one or more electrons and get a negative charge on their ions.
Considering that the charge on the iron is x, We know that charge on the sulfate ion is -2.
x - 2 = 0
x = +2
Therefore, the charge on iron (Fe) in iron sulfate (FeSO₄) is +2.
Learn more about ionic charge, here:
brainly.com/question/13581109
#SPJ2
In each of the combinations, predict the more electronegative element based on its position on the
periodic table. Then look up the actual electronegativities. Circle the reaction pair that should
actually caust a reaction.
More
Combination Combination electronegative
A
B
element based on
position on table
Ba + Fe2-
Ba?- + Fe
Actual
Actual
electronegativity electronegativity
of element of element
a)
Ba =
Fe=
b)
)
Sn + Hg
Sn- + Hg
Sn =
Hg =
c)
)
Na + Mg2+
Na + Mg
Na=
Mg =
=
Zn + CO2-
Zn?- + Co
Zn =
Co=
Answers
c)
)
Na + Mg2+
Na + Mg
Na=
Mg =
=
Zn + CO2-
Zn?- + Co
Zn =
Co=
2.
The highest part of the wave is called the ____________.
Group of answer choices
A. best
B. crest
C. top
D. trough
Answers
Answer:
B. crest
Explanation:
The highest part of a wavelength is called the crest, meanwhile, the lowest part is the trough.
Answer:
b
Explanation:
it's highest because it have the most higher wave
The ion of aluminum is
Al+
Al2-
Al2+
Al3+
Al3-
Answers
Answer:
A13+
Explanation:
I took a test that had this question.
Convert 12.044×10²² molecules of sulphur dioxide into moles
Answers
Answer:
➜ Properties of liquids and gases. Liquids have a fixed volume but no fixed shape. Gases have no fixed volume and no fixed shape. Gases expand to fill the space available. They can also be compressed into a very small space.
Explanation:
12.044 × 10 ²³molecules of sulphur dioxide are 0.2 mole.
does the following atomic model of a chemical reaction correctly demonstrate the law conservation of matter why or why not plz help
Answers
Answer:
ZH² + O² = ZH²O I think this may help you I don't really know how to explain
natural gas has been stored in an expandable tank that keeps a constant pressure as gas is added or removed. the tank has a volume of 4.50x 104 ft 3 when it contains 77.4 million mole natural gas at - 5 °c. what is the new volume of the tank if consumers use up 5.3 million mole and temperature increase to 7 °c?
Answers
Answer:
5-3. Ice water 0 "C. A steel tank contains carbon dioxide at 27 "C and a pressure of 12.0 atm.
Explanation:
What is the required mass to prepare a 0.5M potassium chloride solution using 250mL of water
Answers
Molarity = number of moles / Volume of solution
moles = mass / molecular weight
Molecular weight of KCl =( K-39) + (Cl -35.5) = 74.5 g/mole
Volume of soultion = 250 mL = 0.25L
Molarity = 0.5 M
Now ,
Molarity = number of moles / volume of solution
= Mass of KCl / molecular weight of KCl × Volume
0.5 = Mass of KCl / 74.5 × 0.25
Mass of KCl = 0.5 × 74.5 × 0.25 = 9.3125 grams
Hence the mass of KCl required is 9.3125 grams.
1. Which of the following shows the process of freezing?'
A.candle wax cooling on the table
B.pouring cola over ice
C.heating a cup of water
D.particles are speeding-up and colliding more
Answers
It takes 120 mL of 0.15 M of carbonic acid (H2CO3) to neutralize 300 mL of sodium hydroxide (NaOH) for the following balanced chemical reaction:
2NaOH + H2CO3 → N2CO3 + 2NaOH
The concentration of the sodium hydroxide _____.
0.03 M
0.24 M
0.12 M
0.06 M
Answers
Electrolysis Is One of the Modern Technologies in Architecture’ Prepare an Investigatory Report That Supports the Statement”.
Answers
Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.
Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.
This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.
Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.
Learn more about electrolysis here:
https://brainly.com/question/12054569
Answer: Electrolysis is a technique that separates natural elements. It is commercially used to obtain important materials (e.g., pure metals) for construction.
Electrolysis refers to the use of an electric current to trigger non-spontaneous chemical reactions.
This technology (electrolysis) is commercially important in industry, construction and therefore also in architecture in order to extract metals and minerals from the ground.
Electrolysis uses particular electrolytic cells in order to extract highly pure metals from ores.
Learn more about electrolysis here:
brainly.com/question/12054569
3. Carbon dioxide gas lowers the amount of oxygen that enters the blood? True or false
Answers
Answer:
true
Explanation:
because carbon dioxide is dencer than oxygen therefore it displaces it
0.1216 g
wire
All
g
of
20 mL of 1M HCl
neutralized by addition of 50 mL of 0.20 M NaoH
Find the Atomic mass of Mg ?
added
magnisium was added
the excess
acid
was
Answers
Keep Scrolling! :D
[tex] \rule{999pt}{66646pt}[/tex]
List these distance units in order from smallest to largest: nm,m,km,dm
Answers
Answer:
nm, dm, km, m
Explanation:
1 nanometer = 1e-12 (0.000000000001) kilometers
1 decimeter = 1e-4 (0.0001) kilometers
1 kilometer = 1 kilometer
Regardless of whether 'm' stands for mile or meter, it's still larger than all of these being approx. 1.61 and 1e-3 (0.001) kilometers respectively.
in the future, please provide the exact units.
Such as:
nanometers, decimeters, kilometers, meters
When vectors are added or subtracted, the net force is called the _____.
will give brainliest to whoever gets it right
Answers
Answer:
resultant
Explanation:
I have a hard time telling the difference between convection, conduction, and radiation, anybody got any tips?
Answers
In conduction, heat transfer takes place between objects by direct contact.
Convection
In convection, the heat transfer takes within the fluid.
Radiation
In radiation, heat transfer occurs through electromagnetic waves without involving particles.
2). How are simple carbohydrates, like glucose, used to build starches?
Answers
Carbohydrates which include sugars and starches are the primary energy sources produced in plants and used by heterotrophic organisms.
Carbohydrates are composed of a basic chemical formula that typically contains a ratio of one Carbon atom for every two Hydrogen atoms and one Oxygen atom C1H2O1. Basically one carbon atom for every one water molecule Carbon + Water = Carbohydrate.
Monosaccharides or Single Carbon Chain Sugars include Glucose C6H12O6
Disaccharides or Double Carbon Chain Sugars include Sucrose C12H22O11
Combining monosaccharides and disaccharides create Polysaccharides which are complex sugars called starches.
How how how how how
Hello Americans greetings from the Philippines
Answers
Answer:
good day philipines
Explanation:
Answer:
hello
Explanation:
Why was the war in Peru difficult?
Answers
Answer:
in contrast, peru and Bolivia entered the war hindered by numerous domestic fractures and by an economic and insititutional backwardness that nearly prevented the two countries from fighting the war at all
The N2O decomposition, 2 N2O (g) → 2 N2 (g) + O2 (g), is a zero order reaction that has a reaction rate constant of 2.00 × 10−3 M/s. Initially, 2.00 moles of N2O gas are infused into a 1.00 L vessel at 300. K.Calculate the pressure inside the vessel at 100. seconds after the start of the reaction. Temperature is held constant.
Answers
Answer:
2.00n2g
Explanation:
hope its attachments
9.23 x 10^23 Au atoms= moles Au
Answers
Answer:
1.533 moles Au
Explanation:
To find the moles from atoms, you just use Avogadro's number (6.02214076×10^23 mol^-1) and divide by it. Hope this helped!
Answer:
[tex]\boxed {\boxed {\sf 1.53 \ mol \ Au}}[/tex]
Explanation:
We are asked to find how many moles of gold are in 9.23 *10²³ atoms of gold.
Avogadro's Number or 6.022 *10²³ is used to convert atoms to moles. This is the number of particles (atoms, molecules, formula units, etc.) in 1 mole of a substance. In this case, the particles are atoms of gold.
We convert using dimensional analysis. Set up a conversion factor using Avogadro's Number.
[tex]\frac {6.022 \times 10^{23} \ atoms \ Au}{ 1 \ mol \ Au}[/tex]
We are converting 9.23 * 10²³ atoms of gold to moles, so we multiply by this value.
[tex]9.23 \times 10^{23} \ atoms \ Au *\frac {6.022 \times 10^{23} \ atoms \ Au}{ 1 \ mol \ Au}[/tex]
Flip the conversion factor so the units of atoms of gold cancel.
[tex]9.23 \times 10^{23} \ atoms \ Au *\frac { 1 \ mol \ Au}{6.022 \times 10^{23} \ atoms \ Au}[/tex]
[tex]9.23 \times 10^{23} *\frac { 1 \ mol \ Au}{6.022 \times 10^{23}}[/tex]
[tex]\frac {9.23 \times 10^{23} }{6.022 \times 10^{23} } \ mol \ Au[/tex]
[tex]1.53271338426 \ mol \ Au[/tex]
The original measurement of atoms has 3 significant figures, so our answer must have the same. For the number we found, that is the hundredth place. The 2 in the thousandth place tells us to leave the 3.
[tex]1.53 \ mol \ Au[/tex]
9.23 *10²³ atoms of gold is equal to approximately 1.53 moles of gold.
What do the colors red, green, and blue have to do with light?
Answers
Answer:
The three specific cone cells in our eyes work together, allowing us to translate these three colors of light into millions of different colors. ... When green and blue light are combined, they make cyan. Red and green light make yellow. And when all three primary colors of light are combined, we see white light.
Explanation:
what is the wavelength of a photon emitted when an electron jumps from n=2 to n= 1 energy level of a single ionized helium atom ?
Answers
Answer:
I hope it help you the wavelength is 1.9130E-28
Which of the following is true about the mass of atoms?
А
An individual atom has no mass.
B
The atom of every element has a unique mass.
С
The mass of an atom increases with temperature,
D
The mass of an atom varies over time
Answers
Answer:
i think the answer is C , atom mass increases with temperature
- 5. Venus is like Earth because A. They both have oceans, air, and plant life. B. They both have people living on them. C. They are about the same size and have about the same amount of gravity.
Answers
Answer:
C
Explanation:
Answer:
c
Explanation:
Venus and Earth are often called twins because they are similar in size, mass, density, composition and gravity. Venus is actually only a little bit smaller than our home planet, with a mass about 80% of Earth's.
find the molar mass of 8.54 x 10²⁴ g A₂O₃
Answers
Very Very sorry