Answer: True
Explanation:
True. Sound does not have the required energy or speed to travel through a vacuum. Light can exist almost anyplace.
What would the products be when aluminum chloride (which contains Al3+ and Cl- ions) is melted and electrolyzed? Write half equations to show what goes on at each electrode.
The product of electrolysis : Al at cathode and Cl₂(chlorine) at anode
Further explanationGiven
Aluminum chloride compound
Required
The product of electrolysis
Solution
The rule :
The reaction at the cathode(the negative pole) :
1. the reduced active metal is water, other than that the metal will be reduced
2. H⁺ of the acid will be reduced
The reaction at the anode((the positive pole) :
1. if the electrodes are not inert then the metal is oxidized
2. If inert then:
a. OH⁻ from the base will be oxidized
b. The halogen metal will oxidize
In the electrolysis of molten AlCl₃ with an inert electrode, the cation will be reduced at the cathode and the anion will be oxidized at the anode
Cathode : Al³⁺ + 3e⁻ ⇒ Al(s)
Anode : 2Cl⁻⇒Cl₂(g) + 2e⁻
1.) how many grams is 1.09 moles of Mg3N2?
2.) How many moles are in 7.55 g of KBr?
3.) what is the mass, in grams, of 0.48 moles of Na2O?
4.) how many moles is 14 grams of SrCI2?
Answer:
1. 110 grams
2.0.06 moles
3. 129.1 grams
4. 0.08 moles
Explanation:
Which action most likely causes large rocks to become smaller pieces of rock?
a. melting inside of Earth
b. weathering by wind and water
C. cementing by mud and minerals
d. being pressed between layers of soil
Answer:B
Explanation:
(Revision) When magnesium, Mg, form magnesium ions, Mg2+, has it beer
oxidised or reduced? *
Answer:
it has oxidized because it has has given out 2 ions
Answer:
Oxidised
Explanation:
Mg -------> Mg2+ +2electrons
In this case Mg loses two electrons and loss of electron is oxidation so Mg oxidised.
NUCLEAR REACTION! Help!!!!
Answer:
The example of alpha decay.
Explanation:
¹⁷⁵₇₈Pt → ¹⁷¹₇₆Os + ⁴₂He
The example of alpha decay.
Properties of alpha radiation:
Alpha radiations are emitted as a result of radioactive decay. The atom emit the alpha particles consist of two proton and two neutrons. Which is also called helium nuclei. When atom undergoes the alpha emission the original atom convert into the atom having mass number less than 4 and atomic number less than 2 as compared to parent atom the starting atom.
Alpha radiations can travel in a short distance.
These radiations can not penetrate into the skin or clothes.
These radiations can be harmful for the human if these are inhaled.
These radiations can be stopped by a piece of paper.
Another example:
₉₂U²³⁸ → ₉₀Th²³⁴ + ₂He⁴ + energy
I kinda need help pla
]
What are typical characteristics of metals?
lonization energy
Electron affinity
A
low
low
B.
high
high
C.
high
low
D.
low
high
Answer:
A
Explanation:
Metals has low Ionization energy and low electron affinity. (Option A)
Characteristics of Metals (Ionization energy/Electron Affinity)Metals has low ionization energy because the valence electrons in alkali metals, are very away from the nucleus. Hence, they can easily lose electrons with low energy and become cationic.
Metals have a low electron affinity because they want to give up their valence electrons rather than gain electrons, which require more energy than necessary.
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What is an octet of electrons? Which elements contain an octet of electrons?
Answer:
> Octet, in chemistry, the eight-electron arrangement in the outer electron shell of the noble-gas atoms. This structure is held responsible for the relative inertness of the noble gases and the chemical behaviour of certain other elements.
> Referring to the octet rule, atoms attempt to get a noble gas electron configuration, which is eight valence electrons. Sodium has one valence electron, so giving it up would result in the same electron configuration as neon. Chlorine has seven valence electrons, so if it takes one it will have eight (an octet).
By definition, an electron octet establishes that the atom is stable when it has 8 electrons in its valence shell. Noble gases are electrochemically stable elements, that is, they have 8 electrons in their last shell, containing an electron octet.
The octet rule states that the atoms of the elements bond to each other in an attempt to complete their valence shell with eight electrons. In other words, the atoms will tend to give up or share electrons to complete eight electrons in the valence shell through an ionic, covalent or metallic bond.
In other words, the goal is to have the closest noble gas electron configuration, thus having the last complete electron shell and acquiring stability.
That is, the octet rule defines the property that atoms have of completing their last energy level with eight electrons to achieve stability. The basis of this rule are the noble gases that have 8 electrons in their last shell and are the least reactive elements of the entire periodic table.
In summary, an electron octet establishes that the atom is stable when it has 8 electrons in its valence shell. Noble gases are electrochemically stable elements, that is, they have 8 electrons in their last shell, containing an electron octet.
Learn more:
https://brainly.com/question/13496887?referrer=searchResultswhy we need gravity explain in your own words
Answer:
Gravity is very important for us,animals and plants. We could not survive Earth without it. The sun's gravity keeps Earth in orbit around it, keeping us a good distance away from it (the sun). Gravity is holding down our atmosphere and the air we need to breathe along with it.
metallic bonding lattice structure true or false
Answer: true
Explanation: I looked it up
Please select the word from the list that best fits the definition
Use of this device led to the discovery of cells
a. cells b. microscope c. cell theory
PLZ HURRY
6. (10 Points) The volume of a helium balloon in Los Angeles is 14.0 L The
temperature in Los Angeles is 25°C. Find the volume of the balloon in
Death Values where the temperature is 52°C, with the pressure being the
same in both places.
PLS HURRY
Answer:
V₂ = 15.27 L
Explanation:
Given data:
Initial volume = 14.0 L
Initial temperature = 25°C (25 + 273.15 = 298.15 k)
Final temperature = 52°C = (52+273.15 = 325.15 k)
Final volume = ?
Solution:
Charles 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
V₂ = V₁T₂/T₁
V₂ = 14.0 L × 325.15 K / 298.15 k
V₂ = 4552.1 L.K / 298.15 K
V₂ = 15.27 L
explain what gravity is in your own words
Answer:
the invisible force around the atmosphere that keeps us from floating all over the place
Explanation:
its the best I could come up with
Answer:
gravity is the thing keeping you down to earth keeping your head outta the clouds and your feet on the ground :)
Explanation:
I'll give BRAINLIEST!!!
HELP FAST PLEASE!
Explain how water turns from a liquid to a gas, gas back to a liquid and liquid to a solid.
Answer:
It's all about temperature, when water heats, it turns to a gas - like water on the stove. When heat is reduced, it goes back to a liquid, and when it's frozen (like an ice cube) it's now a solid.
Explanation:
Answer:
Evaporation liquid to a gas. Liquid to solid is freezing.
Gas to liquid is condensation.
Explanation:
Given 88.0 grams of Boron, how many atoms of Boron (B) are present?
There are 4.9 × 10²⁴ atoms in 88.0 grams of Boron.
HOW TO CALCULATE NUMBER OF ATOMS:The number of atoms in a substance can be calculated by multiplying the number of moles in the substance by Avogadro's number (6.02 × 10²³). The number of moles in 88.0 grams of Boron can be calculated as follows:no. of moles = 88/10.81
no. of moles = 8.14 moles
The number of atoms in Boron is calculated as follows: 8.14 moles × 6.02 × 10²³= 4.9 × 10²⁴ atoms of Boron.
Therefore, there are 4.9 × 10²⁴ atoms in 88.0 grams of Boron.
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You and your science group have been handed five mineral samples to identify. First, you sort the minerals by color. One has many
colors. The group decides that it is either fluorite or quartz. What other property would help you identify the mineral?
A)
luster
B)
hardness
C)
acid test
D)
crystal structure
Hurrry
im pretty sure it is b
tghj
We have a cylinder. Calculate the following:
What is the cylinder's mass?
Data:
Volume: 376.8m3
Mass: x
Density: 1000km/m3
Answer:
mass = 2.65 [nearest hundredth].
Explanation:
Mass = Density / Volume
mass = 1000 / 376.8
mass = 2.653927813163.. ≈ 2.65
Samira has a son who is 24 months old. Her sister Paulina also has a son who is one and a half years old. Whose son is older? Explain how you know.
Answer:
the 24 month old
Explanation:
24 divided by the 12 months in a year is 2 and 2 compared to the 1 and a half is bigger
The density of water is 1.00 g/mL. If your swimming pool holds 208,000 gallons of water, what is the weight of the water in a filled swimming pool in tons? (1 ton = 2000 lb).
Hint: Look on your equation sheet for conversion factors
Answer:
12.455≈12.5 tons
Explanation:
1 US gallon of water (gal) = 8.35 pounds of water (lb wt.)
so we divide 208,000 by 8.35 to covert to pounds
then divide the pounds by 2000 to convert to tons.
The activation energy of a reaction is 55.8 kJ/mol and the frequency factor is 1.5×10^11/s.
Calculate the rate constant of the reaction at 24 ∘C
Answer:
23.0 s⁻¹ is rate constant
Explanation:
Using the Arrhenius equation:
k = A * e^(-Ea/RT)
Where k is rate constant
A is frequency factor (1.5x10¹¹s⁻¹)
Ea is activation energy = 55800J/mol
R is gas constant (8.314J/molK)
And T is absolute temperature (24°C + 273 = 297K)
Replacing:
k = 1.5x10¹¹s⁻¹ * e^(-55800J/mol/8.314J/molK*297K)
k = 1.5x10¹¹s⁻¹ * 1.53x10⁻¹⁰
k = 23.0 s⁻¹ is rate constantHELP ASAP no longer than 30 seconds
Answer:
Wont show pic sorry
Explanation:
If you can get the pic to work i could solve it for you
Answer:
HR
Explanation:
HR stands for hour
Which of the following statements is NOT true about combustion reactions?
Select one:
a. The products are always carbon dioxide and methane.
b. The reactions involve burning of hydrocarbons.
c. Combustion reactions have oxygen and a hydrocarbon as reactants.
d. There are two types of combustion reactions: complete and incomplete.
Answer:
The answer is option C, that is, combustion reactions have oxygen and a hydrocarbon as reactants.
To solve such this we must know the concept of combustion reaction. Therefore, Combustion reactions have oxygen and a hydrocarbon as reactants. The correct option is option C.
What is chemical reaction?Chemical reaction is a process in which two or more than two molecules collide in right orientation and energy to form a new chemical compound. The mass of the overall reaction should be conserved. There are so many types of chemical reaction reaction like combination reaction, double displacement reaction.
Combustion reaction is a reaction in which a substance, basically hydrocarbons burns in presence of oxygen to produce carbon dioxide and water. Combustion reaction is a chemical process.
Therefore, combustion reactions have oxygen and a hydrocarbon as reactants. The correct option is option C.
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Which of the following statements are true about whether atoms tend to gain
or lose electrons?
Answer:
C and D
Explanation:
Atoms with five, six or seven valance electrons gain electrons to complete the octet because it is more convenient for the atoms to gain three, two or one electron as compared to lose five, six or seven electrons. Thus atoms with five, six or seven valance electrons form negative ions by gaining electrons.
Atoms with one, two or three valance electrons lose the electrons to get complete octet because it is more convenient for the atoms to lose one two or three electrons as compared to gain the seven, six or five electrons. The atoms with one, two or three valance electrons form positive ions.
what do gasses have
Answer:
Explanation:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy.
Answer:
Gas is a state of matter that has no fixed shape and no fixed volume. Gases have lower density than other states of matter, such as solids and liquids. There is a great deal of empty space between particles, which have a lot of kinetic energy.
Explanation:
Which sequence of atomic numbers represents elements that have similar chemical properties?
A. 3, 12, 21, 40
B. 4, 20, 38, 88
C. 9, 16, 33, 50
D. 19, 23, 30, 36
Given what we know about elements of the periodic table and their properties, we can confirm that the list with elements that have very similar properties is option B.
How do we know that option B list elements with similar properties?The periodic table has a very specific organization.One of the many ways in which it is organized is by groups. It is often divided into 9 groups, usually color-coded. The elements that are in the same group all share similar properties. Option B lists 4 elements of the Alkaline-earth metals group.Therefore, we can confirm that since option B is the choice that lists all elements pertaining to the same group, in this case, the Alkaline-earth metals, it is the correct option as they will all have very similar properties.
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PLEASE HELP!
Prevailing winds cause ocean currents to move in the same direction as the winds
O Claim 1: in all places in the ocean.
O Claim 2: in some places in the ocean.
Claim 3: nowhere in the ocean.
which claim is it?
Answer: due to the nature and complexity of some documents, an accessible version of the ... 1. Grade 6 Science Learning Activity. Ocean, Atmosphere, & Climate Unit ... We started this unit by making initial claims about why Christchurch's air ... Ocean currents move in the same direction as the prevailing wind in some places in the.
Explanation:Ocean water is on the move, affecting your climate, your local ecosystem, and the ... Map of temperature of the North Atlantic Ocean shows the warm Gulf Stream current along the. Winds, water density, and tides all drive ocean currents. ... much of Northern Europe significantly warmer than other places equally as far north.
How many moles of NH4SO4 are in 17.492 grams
Answer: 0.13 moles
Explanation:
HELPP ME PLS
Why is the collision theory considered to be well- established and highly reliable ?
Answer:
The collision theory considered to be well- established and highly reliable, because it never breaks.
Explanation:
WORTH 10 POINTS!! Strawberry plants produce offspring through asexual reproduction. Which statement is true about strawberry plants?
They are identical to the single parent.
They have characteristics of both parents.
Answer:
They are the same as one parent :)
Explanation: that is why we have more yellow corn than black corn because people planted only yellow corn to make more yellow corn :D
help me please!!!!!!!!!
