Answer:
Since the iodine-iodine bond is a pure covalent bond, iodine is a non-polar molecule. The electronegativity difference between the two Iodine atoms is zero.
does this help???
A map that includes the number of sunny days in South America would be used to study what
Answer:
the tables below pull together numbers on the amount of sunshine that each US state usually has a year. there's information by state on the annual average dor percent, hours and days of sun
A map that includes the number of sunny days in South America would be used to study the total amount of sunlight the country receives.
What is a map?A map is a symbolic depiction emphasizing relationships between elements of some space, such as objects, regions, or themes.
Many maps are static, fixed to paper or some other durable medium, while others are dynamic or interactive. Although most commonly used to depict geography, maps may represent any space, real or fictional, without regard to context or scale, such as in brain mapping, DNA mapping, or computer network topology mapping.
The space being mapped may be two dimensional, such as the surface of the earth, three dimensional, such as the interior of the earth, or even more abstract spaces of any dimension, such as arise in modeling phenomena having many independent variables.
Although the earliest maps known are of the heavens, geographic maps of territory have a very long tradition and exist from ancient times.
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TRUE OR FALSE
“Acids are electrolytes”
Answer:
True mark brainlest
Explanation:
MgCl2 (aq) + K2SO4 (aq) --> 2KCl (aq) + MgSO4 (s)
how many moles of potassium chloride are produced from 4.8 moles of magnesium chloride
Answer:
[tex]\boxed {\boxed {\sf 9.6 \ mol \ KCl}}[/tex]
Explanation:
We must use stoichiometry to solve this, which is the calculation of reactants and products in a reaction using ratios.
Let's analyze the reaction given.
[tex]MgCl_2 _{(aq)} + K_2SO_4 _{(aq)} \rightarrow 2KCl _{(aq)} + MgSO_4 _{(s)}[/tex]
Now, look at the coefficients, or numbers in front of the molecule formulas. If there isn't a coefficient, then a 1 is implied.
We want to find how many moles of potassium chloride (KCl) are produced from 4.8 moles of magnesium chloride (MgCl₂). Check the coefficients for these molecules.
MgCl₂: no coefficient= coefficient of 1 KCl: coefficient of 2The coefficient represents the number of moles. Therefore, 1 mole of magnesium chloride produces 2 moles of potassium chloride. We can set up a ratio using this information.
[tex]\frac { 1 \ mol \ MgCl_2} {2 \ mol \ KCl}[/tex]
Multiply by the given number of moles of magnesium chloride: 4.8
[tex]4.8 \ mol \ MgCl_2 *\frac { 1 \ mol \ MgCl_2} {2 \ mol \ KCl}[/tex]
Flip the ratio so the moles of magnesium chloride cancel out.
[tex]4.8 \ mol \ MgCl_2 *\frac {2 \ mol \ KCl} { 1 \ mol \ MgCl_2}[/tex]
[tex]4.8 *\frac {2 \ mol \ KCl} { 1 \ } }[/tex]
[tex]4.8 * {2 \ mol \ KCl}[/tex]
[tex]9.6 \ mol \ KCl[/tex]
9.6 moles of potassium chloride are produced from 4.8 moles of magnesium chloride.
Which two elements on the periodic table share the same period and are both gases?
A. Hydrogen and Helium
B. Fluorine and Bromine
C. Lithium and Potassium
D. Xenon and Argon
Question 19 (3 points)
If the density of the earth was 11.0 g/mL instead of its measured value of 5.51 g/mL, the force of gravity would
be twice what it is at sea level. If the earth's density was twice than its actual density, then in pounds per
square inch at sea level the earth's atmosphere in British units would be equal to:
a) 7.35 psi b) 14.7 psi c ) 29.4 psi d) 44.1 psl e) 98.8 psi
Answer:
c ) 29.4 psi
Explanation:
If the density of earth was twice than its actual density which is 5.51 g/mL, then at sea level the atmospheric pressure of earth in British units would be equal to 29.4 psi because increase of gravity, increase occurs in the atmospheric pressure. If we double the gravity of earth by double of the earth density, so the weight of that same mass of air will be double which leads to the doubling of the atmospheric pressure at the sea level.
Why is it dangerous to have electric appliances near you when you are taking a bath?
Answer:
Because water conducts electricity, so if an electrical current were to meet the water while you're in there taking a bath, you would essentially be surrounded by a huge conductor.
was
4. When a 1.25-gram sample of limestone, that contains CaCO3 (molar mass = 100 g/mol) and inert impurities
dissolved in acid, 0.22 grams of CO2 was generated (molar mass = 44 g/mol). What was the percent of CaCO3 by
mass in the limestone?
CaCO3 + CO2 + CaO
(a) 20%
(6) 40%
(c) 67%
(d) 80%
(e) 100%
Why are different detergents made for cleaning different surfaces and how their chemical structure/composition affects this?
Answer: This is because of the different chemical composition of the types of detergents affects their cleansing actions.
Explanation:
Detergent means any substance which has the ability to clean an object. This includes soaps, soap powers and dish washing liquids as well as water. Detergents fall into two main types
--> Soapy detergents and
--> Soapless detergents
Soapy detergents are sodium salts of fatty acids. They are saponification products of fats and oils. In the chemical composition, each molecule of soap possesses a long hydrocarbon chain attached to an ionic head. The hydrocarbon tail is hydrophobic, so it is insoluble in water but soluble in oil and organic solvents. The ionic head is hydrophilic, so it is soluble in water. Due to this dual nature, when is dissolved in water, the soap molecule forms spherical clusters called MICELLES( hydrocarbon tails points inward and ionic heads point outward). Repulsion between the similarly charged ionic heads keeps the micelles apart. This property helps the soapy detergent to lift grease from grease coated fabrics when applied to it.
While the chemical properties of the Soapless detergents has a hydrophobic tail and a hydrophilic head. The hydrophobic tail is either a long chain hydrocarbon or a benzene ring with a long alkyl group attached. The hydrophilic head, unlike the Soapy detergents, can be positively or negatively charged or even neutral. These chemical properties makes it to have a more favourable and wider application than soapy detergent.it is suitable for washing acid - sensitive fabrics and for breaking up oil slicks.
If the number of bacteria in a colony doubles every 18 minutes and there is currently a population of 200,000 bacteria, what will the population be 36 minutes from now?
Answer:
After 36 minutes, there will be a population of 800,000 bacteria.
Explanation:
After the first 18 minutes, it will double to 400,000. Then, at 36 minutes, it will have doubled again, giving you 800,000.
Mendeleev arranged the
elements by increasing
atomic ?
Mendeleev arranged the elements in the periodic table on the basis of atomic masses and stated the behavior of the elements in a periodic law. The periodic law is when elements arranged by the atomic masses they exhibit the presence of similar properties. Mendeleev focused on the chemical properties of the elements and Meyer focused on the physical properties of the elements. The change in the periodic table is that the elements are now arranged in the order of their atomic numbers instead of their atomic masses.
In the water cycle, clouds form as a result of A. Precipitation. B. Transportation. C. Evaporation. D. Condensation. Please HELPPPP. 15 PIONTS!!!!¡!
Answer: D. Condensation
Explanation: because condensation happens when water vapor cools and turns into clouds
The chemical equation below is correctly balanced.
4 Al + 3 O2 → 2 Al2O3
How many moles of Al2O3 will be formed when 27 grams of Al reacts completely with O2?
Answer:
0.35moles
Explanation:
when 156g of Al reacts with 2molesof Al2O3 then 27g of Al reacts with what then u cross multiply and solve ur answer
0.35moles of Al[tex]_2[/tex]O[tex]_3[/tex] will be formed when 27 grams of Al reacts completely with O[tex]_2[/tex]. A mole consists of precisely 6.022× 10²³particles.
What is mole?A mole is just a measuring scale. In reality, it's one of the International System of Units' seven foundation units (SI). When already-existing units are insufficient, new ones are created. The levels at which chemical reactions frequently occur exclude the use of grams, yet utilizing actual numbers of atoms, molecules, or ions would also be unclear.
A mole consists of precisely 6.022× 10²³particles. The "particles" might be anything, from tiny things like electrons and atoms to enormous things like stars or elephants.
4 Al + 3 O[tex]_2[/tex] → 2 Al[tex]_2[/tex]O[tex]_3[/tex]
moles of aluminium = 27 /26=1.03moles
The mole ratio between Al and Al[tex]_2[/tex]O[tex]_3[/tex] is 2:1
mole of Al[tex]_2[/tex]O[tex]_3[/tex]= 0.35moles
Therefore, 0.35moles of Al[tex]_2[/tex]O[tex]_3[/tex] will be formed when 27 grams of Al reacts completely with O[tex]_2[/tex].
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Which best represents the number of moles in exactly 108 grams of gold?
Answer: 0.548 mol
Explanation:
How much of a 0.250 M sucrose solution must be used to prepare 400.0 mL of a 0.0310 M solution? mL
Answer:
49.6 mL
Explanation:
is the answer, I just did it :)
49.6mL of a 0.250 M sucrose solution must be used to prepare 400.0 mL of a 0.0310 M solution.
What is Molarity?Molarity of a given solution is known as the total number of moles of solute per litre of the solution. A solution that is 1.00 molar (written 1.00 M) contains 1.00 mole of solute for every liter of solution.
Molarity = (No. of moles of solute ÷ Volume of solution in liters)
The unit of molarity is mol L⁻¹.
Molarity is temperature dependent because as temperature changes, volume of the solution also changes.
We can also use the formula-
M1V1 = M2V2
M1 = 0.25
V2 = 400mL
M2 = 0.0310
V1 = ?
V1 = M2V2/ M1
V1 = 49.6mL
Therefore, 49.6mL of a 0.250 M sucrose solution must be used to prepare 400.0 mL of a 0.0310 M solution.
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What does the period number tell about the energy levels occupied bye electrons in an atom
Answer:
The period number tells which is the highest energy level occupied by the electrons.
Explanation:
The period number (denoted by n) is the outer energy level that is occupied by electrons in an atom.The period number that an element is in, is the number of energy levels that the element has.When we move across a period from left to right in a periodic table the number of electrons in atoms increases within the same orbit.how to find rate of reaction experimentally of the reaction ? plz help
A sample of neon gas occupies a volume of 752ml at 25 degrees Celsius. What
volume will the gas occupy at 50 degrees Celsius if the pressure remains
constant?
Answer:
The volume of the gas will be 814 mL.
Explanation:
An ideal gas is a theoretical gas that is considered to be composed of point particles that move randomly and do not interact with each other. Gases in general are ideal when they are at high temperatures and low pressures.
The gas laws are a set of chemical and physical laws that allow determining the behavior of gases in a closed system. The parameters evaluated in these laws are pressure, volume, temperature and moles.
Charles's Law consists of the relationship that exists between the volume and the temperature of a certain quantity of ideal gas, which is kept at a constant pressure, by means of a constant of proportionality that is applied directly. For a given sum of gas at a constant pressure, as the temperature increases, the volume of the gas increases and as the temperature decreases, the volume of the gas decreases because the temperature is directly related to the energy of the movement of the gas molecules. .
In summary, Charles's law is a law that says that when the amount of gas and pressure are kept constant, the quotient that exists between the volume and the temperature will always have the same value:
[tex]\frac{V}{T} =k[/tex]
It is desired to study two different states, an initial state and an final state. You have a gas that is at a volume V1 and at a temperature T1 at the beginning of the experiment. When the temperature varies to a new T2 value, then the volume will change to V2, and the following will be true:
[tex]\frac{V1}{T1} =\frac{V2}{T2}[/tex]
In this case:
V1= 752 mLT1= 25 C= 298 K (being 0 C= 273 K)V2= ?T2= 50 C= 323 KReplacing:
[tex]\frac{752 mL}{298 K} =\frac{V2}{323 K}[/tex]
Solving:
[tex]V2= 323 K*\frac{752 mL}{298 K}[/tex]
V2= 815 mL
The volume of the gas will be 814 mL.
Explain ways humans can reduce global warming. Use 4-5 complete sentences.
pls show your work thx
Explain ways humans can reduce global warming
The list of ways humans can reduce global warming includes: driving affordable electric cars, increasing the use of wind and solar energy in communities, and reducing water waste like plastic bottles. Greenhouse gases in the atmosphere cause global warming and air pollution. Also, reducing wastage that affects our soil benefits agriculture and freshwater locations. Conserve energy by turning off your lights, walking or riding your bicycle, and invest in solar energy. Solar energy can decrease greenhouse gas emissions in our air that we beathe! Affordable solar energy helps the enviorment and poorer communites with reducing air pollution.
.What is the pH of a 0.023 M HCl solution?
Tonsils are lymphatic organs located in the...
A. armpits.
B. bones.
C. throat.
D. ribs.
Answer:
C. throat
Explanation:
25) Which of the following would exert the most pressure on the ground? 3 points
A woman standing in running shoes
O A Woman standing in high heels
A woman sitting on the ground
O It doesn't make any difference as long as the weight is the same.
C
ادا آمد
collina abinet avontually
Answer:
a women standing in high heels
Explanation:
Answer:
A woman standing in high heels
how is liming a lake similar to a doctor prescribing medicine for a patient?
CH3 CH3 CH3-CH2-CH=CH-CH-CH-C-CH-CH3 CH3 COMO SE LLAMA?
Which of the following is a large, burning ball of gas? (2 points)
a
Asteroid
b
Moon
c
Planet
d
Sun
Answer: D: sun
Explanation:
Which choice identifies the compound's structural formula, and what information does the structural formula provide
that the molecular formula does not?
Image B represents the structural formula, and only the structural formula allows the molecular
shape to be determined because it shows the position and alignment of the atoms and bonds.
Image B represents the structural formula, and only the structural formula allows the number of
atoms of each element in the compound to be determined because it provides subscripts.
Image A represents the structural formula, and only the structural formula allows the type of
bond formed by the compound to be determined because it shows the element symbols written
in order (metals and then nonmetals).
Image A represents the structural formula, and only the structural formula allows the bond
length of each bond between the atoms of the compound to be determined because it shows the
bonds represented by a line.
Answer:
second opinion is correct
Br2 + 2LiF → 2LiBr + F2
Given: If 3.6 moles of Br2, react with 9.4 moles of LiF
a) How many moles of F, are produced? I
1 grams F2 to mol = 0.02632 mol
10 grams F2 to mol = 0.26318 mol
20 grams F2 to mol = 0.52636 mol
30 grams F2 to mol = 0.78954 mol
40 grams F2 to mol = 1.05272 mol
50 grams F2 to mol = 1.3159 mol
100 grams F2 to mol = 2.6318 mol
200 grams F2 to mol = 5.2636 mol
Continental mountain ranges are usually associated with
Which of Graphs 1 correctly represents the relationship between the volume and Kelvin temperature of a gas?
Answer:
B
Explanation:
Pressure is directly proportional to temperature
A certain type of material allows electricity to flow through it, but it does not flow quickly or easily through it. Is the material a good or poor conductor? Does it have a low or high resistance?
Decomposition of potassium chlorate are performed in the lab to make oxygen. You are strictly advised to be careful with it. Why is that, what might happen?