Answer:
An ion is a charged atom or molecule. It is charged because the number of electrons do not equal the number of protons in the atom or molecule. An atom can acquire a positive charge or a negative charge depending on whether the number of electrons in an atom is greater or less then the number of protons in the atom.
Answer please
........................................
Answer:
The answer would be:
C. Potassium and magnesium
Explanation:
because the only have valence electrons
what is the molecular formula for sodium sulphur and oxygen
Answer: Na2SO4
The molecular formula for sodium sulphur and oxygen is: (Na2SO4)
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Which statement accurately compares these flashlights?
A. The smaller flashlight has more inertia than the larger flashlight,
so it takes less force to change the motion of the smaller
flashlight
B. The smaller flashlight has less inertia than the larger flashlight, so
it takes more force to change the motion of the smaller flashlight.
C. The smaller flashlight has less inertia than the larger flashlight, so
it takes less force to change the motion of the smaller flashlight.
D. The smaller flashlight has more inertia than the larger flashlight,
so it takes more force to change the motion of the smaller
flashlight
The small flashlight has less inertia and smaller force is required to move it.
According to Newton's first law of motion, an object will continue at rest or in its state of uniform motion unless it is acted upon by an external unbalanced force. This is also called the law of inertia.
The quantity of mass contained in a body is a measure of its inertia. The greater the mass of the body, the greater the inertia and the greater the force required to move the body.
The smaller flashlight has less inertia than the larger flashlight, so it takes less force to change the motion of the smaller flashlight.
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The basic laws of Mendelian genetics explain the transmission of most traits that can be
inherited.
True
False
Answer:
True
Explanation:
A disadvantage of disposing of waste polymers through _____ is that they must first be separated, which can be expensive. What is the missing word in this sentence?
A disadvantage of disposing of waste polymers through recycling is that
they must first be separated.
Recycling is the process of forming new polymers and compounds as against their disposal .
Recycling involves separating the items into various sections such as paper,
plastic , metal etc. This is because they both undergo different recycling
processes.
The disadvantage of this process is that it's time consuming and also
expensive as a great amount of time and man power is needed to
separate the waste items.
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When particles in a solid or liquid move faster they move slightly further apart, what is this called?
When particles in a solid or liquid move faster they move slightly further
apart and is referred to as Elastic collision
Liquids and gases possess more kinetic energy than solids which is why
there is movement of its atoms in a system. Gas have the highest kinetic
energy and solids have the lowest. When the atoms move ,they collide with
one another which pushes the particles further apart.
The atoms in liquid and gas exhibit vibrational(rotational) motion which brings about movement and collision of the particles.
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How many atoms are in 2.05 g of Na?
How many grams are in 4.5 x 1025 atoms of P?
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The body also loses heat by the evaporation of sweat. How is a tea kettle boiling similar to the evaporation of sweat from the body?
Well they both leat sweat out, so they steam.
Describe the 3 dimensional NaCl lattice.
NaCl has a cubic unit cell, best thought of as a face-central cubic array of anions with an interpenetrating FCC action lattice or (vice versa). The cell looks the same whether you start with anions or cations on the corners. Each ion is 6 co-ordinates and has a local octahedral geometry.
NaCl lattice exhibit cubic unit cell. The face-centered cubic array of anions with an interpenetrating fcc cation lattice are seen in 3D structure. Each ion is 6-coordinate and has a local octahedral geometry.
What is sodium chloride?Sodium chloride is an ionic compound, formed from the sodium metal and chlorine atom. The ionic bond is formed by loss of one electron from sodium metal to the chlorine atom.
The lattice structure of all metals contains a pool of cations in the sea of mobile electrons. The electrons can be delocalized into the interstices and thus metals conduct electrically and thermally.
In the fcc lattice of NaCl, sodium atoms are arranged at the corners and Cl atoms are at the center of each cube face of the cell. They are assumed to touch along face diagonals.
Atoms are arranged at the corners of the cube with another atom at the cube center also hence there will 4 atoms one unit cell.
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In which container are the particles of water moving fastest? In which container are the particles moving slowest
Answer:
Particles move faster the farther they are apart, so the container with the most spread out particles.
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Which picture correctly shows the path of the reflected light ray?
Select one:
a. A
b. B
c. C
d. D
The picture that correctly shows the path of the reflected light ray is: Picture A.
A ray diagram can be defined as the graphical representation of the possible paths that a light wave takes from one point (source) to another.
Basically, some of the phenomenon and properties associated with light ray include the following:
RefractionDiffractionInterferenceReflectionA reflected light ray completely bounces off a surface and as such, light wave do not pass through the surface as illustrated in Picture A.
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What is the IUPAC name for N2O? mononitrogen dioxide dinitrogen monoxide nitrogen oxide nitrous oxide.
The IUPAC name for N2O is nitrous oxide.
The IUPAC name with the full meaning (International Union of Pure and Applied Chemistry) is a system of naming chemical compounds by chemical scientists.
The given IUPAC name to N2O is nitrous oxide. Nitrous oxide is commonly known as the laughing gas is a colorless gas with a pleasant, sweetish odor and taste that, when breathed, causes placidity to pain.
Nitrous oxide has several medicinal applications due to its anesthetic and pain-relieving properties, and it can be given by Medical professionals.
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What is the IUPAC name for N2O?
B. dinitrogen monoxide
What is the common name for N2O?
D. nitrous oxide
why does helium fusion require higher temperatures
Answer:
Nuclear fusion of hydrogen to form helium occurs naturally in the sun and other stars. It takes place only at extremely high temperatures. That's because a great deal of energy is needed to overcome the force of repulsion between the positively charged nuclei.
Explanation:
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Which element has 1 valence electron in its outer shell and will react with a
group 17 element in a 1:1 ratio?
Answer:
sodium (Name) and Chlorine (Cl)
Explanation:
Any of the Group 17 elements (the halogens) only need one additional electron to take on the electron configuration of the noble gas just to it's right. That would be argon (Ar) in this case.
For this reaction, the needs of both elements (to reach a stable Group 17 electron configuration) is matched: Just one electron is provided (Na) and taken (Cl) and that forms a single bond
Most elements are ____________. The _____________ elements on the left of the stair-step line on the ______________ of Elements are metals or metal-like _____________. Some of the physical properties of metals are ______________ (shininess) and ___________ density. They are also good conductors of ___________ and ______________. Metals can be hammered into __________sheets.
Answer:
metals, 88 , periodic table , luster , heat, electricity , thin, right, opposite , appearance , luster , malleable , ductile, opposite , shiny, moderately
Explanation:
metals, 88 , periodic table , luster , heat, electricity , thin, right, opposite , appearance , luster , malleable , ductile, opposite , shiny, moderately Is the answer.
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You have a sealed 2 liter flask that contains nothing but water and carbon dioxide. The flask is half-filled with liquid water, has a temperature of 25°c, and the overall pressure within the flask is 0. 1 atm. How many moles of co2 are in the flask? at this temperature, you may take the kh value for co2 as 0. 033 m / atm.
In this exercise we want to calculate the amount of moles, so this is going to be:
[tex](4.6)(10^{-3}) \ mols \ CO_2[/tex]
Knowing that Henry's law is given by:
[tex]C = KHP[/tex]
Where constants are given by:
C = Concentration KH = Henry's law constant = [tex]0.033 m/atm[/tex]P = partial pressure = [tex]0.07 atm[/tex]Before we can find the concentration of CO2 (and hence the moles of CO2), we first need to find its partial pressure. We look up the vapor pressure of water at 25º and find it to be 0.03 atm. Since the total pressure is equal to 0.1 atm, this mean the partial pressure of:
[tex]CO_2 = 0.1 \ atm - 0.03 \ atm = 0.07 \ atm[/tex]
Now using Henry's law, we find the concentration:
[tex]C = (0.033)*( 0.07) = (2.31)*(10^{-3})[/tex]
Converting to moles of CO2, we have:
[tex](2.31)*(10^{-3})*( 2) = (4.6)*(10^{-3})[/tex]
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A student was performing paper chromatography and let the separation continue overnight. The
A student was performing paper chromatography and let the separation continue overnight. The student wished to determine if the mixture contained a substance with an RF factor of 0.343 where:
Rf = (distance travelled by the component)/(distance travelled by the solvent)
a) What data would be affected by this error?
b) Explain the effect on the calculated Rr.
Based in the information given, the data that'll be affected by the error is the value of the solvent data.
It should be noted that the data that'll be affected based on the scenario given is the value of the solvent. When the preparation is kept overnight, there'll be an overflow of the solvent.
In such a case, it'll be difficult to get the correct distance that the solvent travelled. The effect on the calculated Rr is that the calculated Rr will be incorrect due to the error in solvent value.
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As part of a science experiment, Jose did a test for starch on a slice of apple and a slice of potato. The yellow-orange iodine solution stayed the same color when it was put on the apple, but it became black on the potato.
Why did the iodine solution change color on the potato?
A.
The iodine burned the potato and turned it to ash.
B.
The iodine mixed with the colors of the potato so it looked black.
C.
The iodine evaporated into a gas.
D.
The iodine reacted with the potato to form a new substance.
Answer:
d, the idiodine reacted
1. Which ion has the same electronic configuration as S2-?A 02_ B SC3* C P* D Si4*
How does transfer of infrared energy relate to weather and climate conditions on Earth?
Answer:
Convection is the transfer of heat energy in a fluid. Air in the atmosphere acts as a fluid. The sun's radiation strikes the ground, thus warming the rocks. As the rock's temperature rises due to conduction, heat energy is released into the atmosphere, forming a bubble of air which is warmer than the surrounding air.
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The melting and boiling point tests will MOST help them to infer the strength of intermolecular forces between ionic and covalent compounds?
Question 12 options:
True
False
Answer:
True po
Explanation:
Sana nakatutulong
#Carry on learning
Ionic compounds have higher melting and boiling point than covalent compounds, since ionic bonds are stronger than covalent bonds. Hence, we can compare the intermolecular forces using melting or boiling points.
What is boiling point?Boiling point of a substance is the temperature at which the substance changes from liquid state to gaseous state. Melting point is the temperature at which the substance changes from solid state to liquid state.
Both melting point and boiling point depends on the bond type, molecular weight, temperature and pressure. Stronger the bond , higher energy needed to weaken the intermolecular force between molecules to convert them to liquid state or vapour state.
Hence, the temperature that have to be applied to loosen the bonds to boil them or melt them increases as bond strength increases. Therefore, these physical quantities definitely helps to infer the strength of bonds.
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Does the sound wave above experience a change in pitch or loudness? Why? (PLS HELP 60 ILL PNTS AND ILL GIVE BRAINIEST!!
Answer:
Explanation:
Amplitude, or the size of the wave height, affects the loudness. Larger the amplitude, the louder the volume. Period, or the time it takes for the wave to complete one round, determines the pitch. Shorter period (or higher frequency) means higher pitch.
Which of these describes “Al”?
atomic mass
chemical symbol
atomic number
none of the above
what describes “Al” is chemical Symbols.
It is not atomic mass because atomic mass is the quantity of matter contained in an atom of an element.
It is not atomic number because it's the number of proton in an atom of an
element.
The above description "Al" is a chemical symbols.
Chemical symbols are used to represents elements in the periodic table.
The element represented is aluminium.
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How many atoms of each element are in NaCI?
Enter your answer in the boxes:
|___| sodium
|___| chlorine
Answer:
well first you need 1 s then you need 1 ch
Explanation:
A 2.37 g sample of a substance suspected of being pure gold is warmed to 71.8 ∘C and submerged into 15.9 g of water initially at 24.3 ∘C. The final temperature of the mixture is 27.0 ∘C.
Answer:
specific heat capacity of the unknown is 629.66 J/kg C
Explanation:
As we know that gold is heated to 72.3 degree C and mixed with water at 24.8 degree C
Now the final temperature of the mixture is 26 degree C
here we can say that heat given by the gold = heat absorbed by the water
So we will have
Q_{in} = Q_{out}Q
in
=Q
out
2.62 s (72.3 - 24.8) = 15.6 (4186) (26 - 24.8)2.62s(72.3−24.8)=15.6(4186)(26−24.8)
so we will have
s = 629.66 J/kg Cs=629.66J/kgC
so specific heat capacity of the unknown is 629.66 J/kg C
I have to answer questions about science
Answer:
What Questions?
Explanation:
What Questions?
Answer:
Explanation:
What is the Questions frist ?
how would separate a mixture of lead 2 chloride and sodium chloride
Answer:
lower th
Explanation:
Pb{Cl}_{2})$ is an inorganic
answer:
lower the temperature so the lead chloride settles out of solution
compound which is a white solid under ambient conditions. It is one of the most important lead-based
reagents. It is poorly soluble in water. And it is insoluble in cold water. Sodium chloride is ssolble at all temperature
so lower the temperature
How many molecules of N 2 are produced by reacting 0.0024 grams of NaN 3 according to the equation: 3 CuCl(aq) 3 NaN 3(aq) ---> Cu 3N(s) 3 NaCl(aq) 4 N 2(g)
Answer:
4 molecules
Explanation:
In the products side of the equation, you see 4N2, this means there are 4 molecules of N2 that are produced by the reaction.
Draw the structure of the product that is formed when the compound shown below undergoes a reaction with 1 equivalent of ch3mgi and then is treated with water.
When the compound shown is treated CH3MgI followed by water, 1,3 - cyclohexadienol is formed.
Grignard reagent is an alkylmagnesium halide. Grignard reagents are important synthetic tools in chemistry. They are used to synthesize and number of compounds in the laboratory.
When the Grignard reagent, CH3MgI is reacted with compound shown followed by treatment with water, the product of the reaction is 1,3 - cyclohexadienol whose structure is shown in the second image attached to this answer.
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what is the best way to study and understand electron configuration??
Answer:
You have to remember this memory aid, diagonals and all.
You have to keep a tight tally of the electrons you’ve used so far so you don’t go over the number of electrons in the element you’re working on.
You have to remember how many electrons fit into each subshell (s, p, d, f).
It takes a lot of time, especially when the element has more than 20 electrons.
Explanation:
