Answer:
Number of moles of KIO₃ = 4.0×10⁻⁵ mol
Explanation:
Given data:
Concentration of solution = 0.04 M
Volume of solution = 1 mL
Number of moles of KIO₃ = ?
Solution:
Molarity = concentration
Molarity = number of moles / volume in L
We will convert the volume into L.
1 mL×1 L /1000 mL
0.001 L
Now we will put the values in formula,
0.04 M = number of moles / 0.001 L
Number of moles = 0.04 M ×0.001 L
Number of moles = 4.0×10⁻⁵ mol
the first stage of an blank is when clouds form; this is the cumulus stage
Answer:
thunderstorm
Explanation: The cumulus stage is the first stage in a thunderstorm and it involves clouds forming. We see the cloud that will become a thunderstorm as it is starting to form and grow. This is due to the rising levels of thermal energy.
Volcanic islands can form over hot spots. The Hawaiian Islands started forming over hot spots in the Pacific Ocean millions of years ago. What process causes the hot, solid rock to rise through the mantle at these locations?
Answer: Convection Currents
Explanation:
Due to the different temperature occurring at the upper and lower layers of the mantle, it causes heat transfer to occur. One of such heat transfer is the Convection currents which causes warmer, less dense rock material in the core to rise through the mantle. Also, the cooler rocks in the higher mantle move slowly towards the core.The movement caused by these Convection current in the Earth are called plate tectonics which are responsible for earthquakes and volcanoes.
Need a little help with science please
Answer:
I'm pretty sure its liver and pancreas
Explanation:
the pancreas delivers the digestive juice to the small intestine through small tubes, your liver makes the digestive juices called the bile that helps digest fats and some vitamins
Answer:
the answer is liver and pancreas
An atom of which of the following has the least ability to attract electrons?
A. Silicon
B. Oxygen
C. Nitrogen
D. Bromine
Answer:
A. Silicon
Explanation:
The ability of an atom to attract electrons is known as electronegativity.
Electronegativity is the measure of the relative tendency with which the atoms of the element attract valence electrons in a chemical bond.
Across a period from left to right, the ability to attract electrons increases. Down a group, the ability decreases. Silicon is to the left most part and it will have the the least ability to attract electrons.Which statement describes the motion of the sun?
The sun rotates at the same rate throughout.
The sun does not rotate at its poles.
Different parts of the sun rotate at different rates.
The sun does not rotate at its equator.
Answer: Different parts of the sun rotate at different rates.
Explanation:
The statement that best describes the motion of the sun is that different parts of the sun rotate at different rates.
First and foremost, we should note that the rotation of the sun is on its axis and also the sun isn't a solid. Due to this, its motion will be that there'll be rotation of different part of it at different rates. Assuming the sun was solid, then all of its parts will move together.
Answer:
Different parts of the sun rotate at different rates.
Explanation: pic proof
The following diagram shows the bonds that make up potassium acetate.
Answer:
6
Explanation:
ye
Rift valleys can form when fractures in Earth's crust widen. The valley walls slowly move apart at a rate of only a few millimeters a year.
Which type of boundary would rift valleys form at?
A. Convergent
B. Divergent
C. Transform
D. Transform Fault
Answer:
B. Divergent
Explanation:
Rift valleys are usually formed at divergent margins where fractures in the earth's crust widens.
The fracture widens due the pulling apart of the plates that are involved.
Most rift valleys are located within the continental crust. One of the prominent rift margins in the world is the East Africa rift valley system. This creates a crack within the earth that continues to grow as the separation continues.The electrical charge of the nucleus is determined by:
a. the number of neutrons only
b. the number of protons and neutrons together
c. the number of protons only
d. the number of electron only
MULTIPLE CHOICE QUESTION
Electrons fill in energy levels in which of the
following ways?
1.Lowest energy level first, so it fills in the inside
rings first
2.Lowest energy level first, so it fills in the
outside rings first
3.Highest energy level first, so it fills in the inside
rings first
4.Highest energy level first, so it fills in the outside
rings first
Answer:
I think the answer is 3. Highest energy level first, so it fills in the inside rings first
Electrons occupy the lower-energy orbitals first, then go on to fill the next higher-energy orbital until all of the electrons contain been placed.
Which energy levels do electrons fill first?Most of the time, electrons occupy the lower-energy orbitals first, then go on to fill the next higher-energy orbital until all of the electrons have been positioned.
The lowest energy level is always added to initially until it has as many electrons as it can have. The following higher energy level is then filled with electrons, and so on.
The lowest energy level is always filled up with additional electrons first, up to the point where that level can hold no more, and then further electrons are added to the next higher energy level, and so on. A level's total number of orbitals determines how many electrons can be present at that energy.
Therefore, the correct answer is option 3. Highest energy level first, so it fills in the inside rings first.
To learn more about Electrons refer to:
https://brainly.com/question/860094
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Help Please with this
pleas HELP QUICK!!!!!!!!!!!!!!!!!
Answer: first is last second is first and 3rd is second
Explanation:
what elements comprise the largest portion of Earth's atmosphere?
Answer:
Nitrogen and Oxygen make up 99% of the Earths atmosphere. Then Argon makes up the rest of the atmosphere.
Differentiate between worldwide conservation and national conservation policy.
A breeder reactor is one type of nuclear reactor. In a breeder reactor, uranium-238 is transformed in a series of nuclear reactions into plutonium-239.
The plutonium-239 can undergo fission as shown in the equation below. The X represents a missing product in the equation.
Compare the amount of energy released by completely fissioned plutonium-239 to the amount of energy released by the complete combustion of the same amount of coal.
Answer:hope this help
Explanation:
Chemistry 1 - Types of Radioactive Decay
Answer:
Explanation:
The reaction expression is given as:
⁴⁰₁₈ Ar → X + ⁰₁B
To solve this problem, we must bear in mind that both mass number and atomic number must be conserved.
So;
For the mass number:
40 = A + 0
A = 40
For atomic number:
18 = Z + 1
Z = 18 - 1 = 17
An atom is identifiable by the atomic number. Since the atomic number of X is 17 then it is Cl, chlorine
Why the microscope is made an inclination joint?
Answer:
inclination joint This is the joint between the pillar and the arm of the microscope. It is used to tilt the body tube and stage. It is usually best to keep the stage horizontal.
Explanation:
Observe the image of sodium. List the properties you see.
Answer:
It is soft and white. It has a low melting and boiling point, a good conductor electricity, and reacts with water. Furthermore, it is also highly reactive, malleable, and ductile.
Explanation:
Hope I helped!
Answer:
silvery-white and waxy
Explanation:
Properties means the observations you can make just by looking at it or the qualities that the object has.
So when I looked at the sodium I saw a silvery-white metal (sodium is a metal), that has this waxy appearance to it.
w 17. Which of the following is the atomic number of a halogen? A. O 10 B. 136 C. 17 D. 13
Answer:
C. 17
Explanation:
The question above is related to the "Periodic Table of Elements." The Halogen group is located on the right side of the table. It consists of six elements: Fluorine, Chlorine, Bromine, Iodine, Astatine and Tennessine.
The "atomic number" of an element refers to the number of protons that can be found in the element's nucleus. Among the halogens, "Chlorine" is the only one with an atomic number of 17. Halogens do not have an atomic number of 10, 136 and 13.
8 moles Cl to grams 3
Answer: I don’t understand what your asking elaborate more
Explanation:
Turning on your X-Box is an example of___ energy turning into ___ energy.
A.electrical,nuclear
B.nuclear,sound
C.electrical,light
D.electrical,chemical
Answer:
electrical --> light
Explanation:
Approximately how long does it take for the moon's phases to change from a NEW moon to a FULL moon?
1 week
3 weeks
2 weeks
4 weeks
Answer:
4 weeks
Explanation:
It takes 4 weeks for the cyclle to be happening again
3. A property of acids is that they taste sour. A
property of bases is that they feel slippery. Would
you use either of these properties to identify an
unknown substance? Why or why not?
Explanation:
Touching or tasting these unknown substances could be lethal or cause severe burns to your skin, so it is advisable to use other methods to identify substances.
the rate of effusion of co2 gas through a porous barrier is observed to be 9.31x 10^-4 mol/h. under the same conditions, the rate of effusion of N2 gas would be _______ mol/h
Answer:
[tex]1.167\times 10^{-3}\ \text{mol/h}[/tex]
Explanation:
[tex]R_1[/tex] = Rate of diffusion of [tex]CO_2[/tex] = [tex]9.31\times 10^{-4}\ \text{mol/h}[/tex]
[tex]R_2[/tex] = Rate of diffusion of [tex]N_2[/tex]
[tex]M_1[/tex] = Molar mass of [tex]CO_2[/tex] = 44.01 g/mol
[tex]M_2[/tex] = Molar mass of [tex]N_2[/tex] = 28.0134 g/mol
From Graham's law we have the relation
[tex]\dfrac{R_1}{R_2}=\sqrt{\dfrac{M_2}{M_1}}\\\Rightarrow R_2=\dfrac{R_1}{\sqrt{\dfrac{M_2}{M_1}}}\\\Rightarrow R_2=\dfrac{9.31\times 10^{-4}}{\sqrt{\dfrac{28.0134}{44.01}}}\\\Rightarrow R_2=1.167\times 10^{-3}\ \text{mol/h}[/tex]
The rate of effusion of the [tex]N_2[/tex] gas would be [tex]1.167\times 10^{-3}\ \text{mol/h}[/tex].
What is the molar mass of carbon?
Try to balance the 5 attached equations.
Answer:
1)2kclo3=2kcl+3o2
2)2NaCl+F2=2NaF+cl2
3)Pb(OH)2+2HCl=2H2O+PbCl2
4)2Albr3+3k2so4=6kbr+al2(so4)3
5)CH4+2O2=CO2+2H2O
The mole is used in chemistry
A) to count large numbers of very small particles, such as atoms or molecules.
B) to relate the mass and the number of particles of a substance to each other.
C) to relate the mass and the volume of a substance to each other.
D) all of these are true.
what does geotropism enable plants to do
Answer: Geotropism allows the plants to correctly orient themselves for growth.
Explanation:
What is formed when polyatomic ions bond with other ions?
It would be Ionic Compounds.
PLEASEEEE HELPP
If 359 mL of a gas were contracted to only 269 mL, what would be the initial temperature of it if it measured 422 K after the change?
I NEED IT FAST!!
Answer:
T₁ = 563.19 K
Explanation:
Given data:
Initial volume = 359 mL
Final volume = 269 mL
Final temperature = 422 K
Initial temperature = ?
Solution:
The given problem will be solve through the Charles Law.
Charles Law:
According to this law, The volume of given amount of a gas is directly proportional to its temperature at constant number of moles and pressure.
Mathematical expression:
V₁/T₁ = V₂/T₂
V₁ = Initial volume
T₁ = Initial temperature
V₂ = Final volume
T₂ = Final temperature
Now we will put the values in formula.
V₁/T₁ = V₂/T₂
T₁ = V₁T₂ / V₂
T₁ = 359 mL × 422 K / 269 mL
T₁ = 151498 mL.K / 269 mL
T₁ = 563.19 K
Please help me with this question
Thank you!
Answer:
B. 3+
Explanation:
When Fe²⁺ loses an electron, it becomes an Fe³⁺ ion.
The loss of an electron in an atom makes the atom becomes positively charged. Further losing electrons makes the atom more positive.
For the given ion;
Fe²⁺ if it loses an electron more, it becomes Fe³⁺.
The expression is given as:
Fe²⁺ → Fe³⁺ + e⁻
