Answer: B. The density of the helium atoms decreased.
Explanation:
In 1-2 complete sentences, explain where you can find visible light on the electromagnetic spectrum.
Use the "RAP" method to answer this short-answer question:
Restate the question.
Answer the question.
Prove your answer citing textual evidence from the course.
Don't forget to use complete sentences and proofread your answer.
Your answer:
Answer:
I NEED HELP TOO
Which statement describes the charging method shown?
The spheres are charged through friction.
The spheres develop the same charge.
Electrons move from the rod to Sphere A.
Electrons move from Sphere A to Sphere B.
Answer:
D
Explanation:
correct on edge 2021 :)
The movement of the electrons from sphere A to sphere B is shown as the charging method. Thus option D is correct.
What is an electron?An electron is a negatively charged subatomic particle and can either be free or bound to the nucleus and it exists in a spherical shell. of the various radii that represent the energy levels. The movement of the electron from sphere one to sphere two is represented by the image.
Find out more information about the charging method.
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How could you test your prototype to determine the effectiveness of your spin table? What data could you collect? How many trials would you run?
Answer:
Testing prototypes is an inherent part of finalizing designs. Nobody wants to wonder why users are not utilizing an app the way it should be utilized or why they can’t seem to complete a purchase on your website. And nobody wants to rework something that’s already been shipped.
Conducting tests as early as the prototyping stage can help you avoid these unfortunate scenarios. User research with Qualaroo can help you validate your current design and uncover new areas of focus for the next iteration. Use Qualaroo to understand how people use your interface early on in the design process and evolve your prototype into a working product faster.
moms home a hole
hope your happy about the poop youve done
plz help with this.....☺
Answer:
There is this property called CATENATION which is basically the tendency of the atoms to bind to eachother. It is the MOST in the carbon after that silicon.
So the answer should Carbon atoms bond together to form groups of compounds.
Why does the salt reappear when the water ?
Answer:
Explain that as the water evaporates, water molecules go into the air. The water molecules that evaporate become a gas called water vapor. Only the water evaporates, leaving the sodium and chloride ions behind. The sodium and chloride ions attract each other and re- form salt crystals.
Hope this helps!! :D
GUYS REALLY, PLEASE HELP LIKE IM NOT KIDDING I NEED TO GET THIS DONE HELP ME
How are the processes of melting and freezing similar?
They are both processes that physically change a substance.
They are both processes where heat is absorbed by a substance.
They are both processes where heat is released by a substance.
They are both processes that chemically change a substance.
Please help will give 25 points!!!! Need help now!!!
Answer: They are both processes that physically change a substance.
Explanation:
What kind of information does the activity series of metals give us?
A. It lists the different charges metal ions can have.
B. It compares how reactive the metals are.
C. It tells us which metal compounds are soluble.
D. It tells us how good of a conductor a metal is.
An information does the activity series of metals give us that it compares how reactive the metals are. Therefore, option B is correct.
What do you mean by metals ?Metals are lustrous, opaque elements that conduct heat and electricity well. Most metals are malleable and ductile, and they are denser than the other elements.
The term "metal" is thought to have originated during the hippie movement, when "heavy" meant serious or deep. Metal music is defined by several elements, including heavily distorted guitar riffs and chords, powerful drumming, extra low-range bass notes, and aggressive or throaty vocals.
Thus, An information does the activity series of metals give us that it compares how reactive the metals are, option B is correct.
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Answer:
It compares how reactive the metals are.
Explanation:
just did it
The building blocks of atoms are called:
A.elements
B.atoms
C.sub-atomic particles
D.protons
Answer:
C ,,,,,,,,,-;:--::-'
A 19.0 g piece of metal is heated to 99.0 °C and then placed in 150 mL of water at 21°C. The temperature of the water rose to 23°C. What is the specific heat of the metal?
Answer:
[tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
Explanation:
[tex]m_m[/tex] = Mass of metal = 19 g
[tex]c_m[/tex] = Specific heat of the metal
[tex]\Delta T_m[/tex] = Temperature difference of the metal = [tex]99-23=76^{\circ}\text{C}[/tex]
V = Volume of water = 150 mL = [tex]150\ \text{cm}^3[/tex]
[tex]\rho[/tex] = Density of water = [tex]1\ \text{g/cm}^3[/tex]
[tex]c_w[/tex] = Specific heat of the water = 4.186 J/g°C
[tex]\Delta T_w[/tex] = Temperature difference of the water = [tex]23-21=2^{\circ}\text{C}[/tex]
Mass of water
[tex]m_w= \rho V\\\Rightarrow m_w=1\times 150\\\Rightarrow m_w=150\ \text{g}[/tex]
Heat lost will be equal to the heat gained so we get
[tex]m_mc_m\Delta T_m=m_wc_w\Delta T_w\\\Rightarrow c_m=\dfrac{m_wc_w\Delta T_w}{m_m\Delta T_m}\\\Rightarrow c_m=\dfrac{150\times 4.186\times 2}{19\times 76}\\\Rightarrow c_m=0.8696\ \text{J/g}^{\circ}\text{C}[/tex]
The specific heat of the metal is [tex]0.8696\ \text{J/g}^{\circ}\text{C}[/tex].
name the compound TiBr3
Answer:
Titanium (III) bromide
Explanation:
As it is an ionic compound we write the valency for transition elements, and that means here that titanium loses three electrons to become +3 (Ti
The name of the compound is titanium (III) bromide as it has titanium in +3 oxidation state.
What is compound?
Compound is defined as a chemical substance made up of identical molecules containing atoms from more than one type of chemical element.
Molecule consisting atoms of only one element is not called compound.It is transformed into new substances during chemical reactions. There are four major types of compounds depending on chemical bonding present in them.They are:
1)Molecular compounds where in atoms are joined by covalent bonds.
2) ionic compounds where atoms are joined by ionic bond.
3)Inter-metallic compounds where atoms are held by metallic bonds
4) co-ordination complexes where atoms are held by co-ordinate bonds.
They have a unique chemical structure held together by chemical bonds Compounds have different properties as those of elements because when a compound is formed the properties of the substance are totally altered.
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who tryna date? like ong
Answer:
Im confused. Do you need help with something?
Explanation:
Answer:sheshhh sayless XD
Explanation:
How to obtain sugar from a solution of sugar in water? Why will filtering not work?
Answer:
Sugar can be obtained by evaporation.
Filtering wont work because sugar is soluble in water thus will mix to form one layer.
WILL GIVE BRAINLIEST!
Answer:
I believe the Answer is B, as time is not dependent on growth, but growth is dependent on time.
Explanation:
___ _is an energy resource that WILL NOT run out in the next several hundred
years .
А
Renewable Energy Resource
B. Non-renewable Energy Resource
С
Fossil Fuel
D. Forever Fuel
Answer:
A,
Explanation:
A renewable energy resources can be renewed meaning it will not run out.
Where does the water in air come from?
Answer:
About 90 percent of water in the atmosphere is produced by evaporation from water bodies, while the other 10 percent comes from transpiration from plants. There is always water in the atmosphere.✌️
When moving across a row in the Periodic Table, which of the following increases?
Ionization energy definition?
Answer:
In physics and chemistry, ionization energy or ionisation energy, is the minimum amount of energy required to remove the most loosely bound electron of an isolated neutral gaseous atom or molecule.
I hoped this helped :D
Explanation:
If the half-life of a radioisotope is 250 years how much of a 96.0 gram sample will remain after 750 years
Answer:
12 grams
Explanation:
96g=0 years
48g=250 years
24g=500 years
12g=750 years
If I have 13 protons and 12 electrons what is my charge?
Answer:
The charge would be +1
Explanation:
Protons have a positive charge while electrons have a negative charge. Therefore, it's simple subtraction. In every case, subtract the number of electrons from the number of protons.
13 - 12 = 1
Therefore the charge is +1
Here's one more example:
If the element chromium (Cr) has 24 protons and 28 electrons, what is its charge? Remember that protons have a positive charge and electrons have a negative charge.
24 - 28 = -4
Charge = -4
It would be written as followed when associating charge with a specific element: [tex]Cr^{-4}[/tex]
If an element has a neutral charge, that means the number of protons and neutrons are the same. If you look at the periodic table of elements, all of the elements listed have a neutral charge. The 0 isn't showed in the corner because it isn't necessary.
Bonus Information:
This isn't related to your question, but I've come across confusions when it comes to particles. Remember that protons (+) and electrons (-) are the only particles that have a charge, therefore, as it says in it's name, neutrons are neutral or have no charge. Neutrons do not contribute to charge, but they do contribute to the mass of an atom. So the number of protons added to the number of neutrons equate to the mass of an atom. Electrons have mass, but it's so miniscule and insignificant that it doesn't even contribute to the overall mass of the atom, so don't count those.
Remember:
C = p - e
M = p + n
C = atomic charge, M = atomic mass, p =protons, n = neutrons, e = electrons
I hope this helps!
WILL GIVE BRAINLEST!!
Question 5
Coastal flooding occurs when_
A. Rocks or debris block rivers causing them to overflow
B. Severe weather occurs causing large waves to hit the coast
C. Huge amounts of snow and ice melt due to sudden temperature variations
D. Colossal amounts of rain fall in a short period of time
The only sure evidence for chemical reaction is
A sample of water is heated from 60.0 °C to 75.0°C by the addition of 140 j of
heat. What is the mass of the water?
work too pls !!!
Mass of the water : 2.23 g
Furter explanationHeat
Q = m.c.Δt
m= mass, g
c = heat capacity, for water : 4.18 J/g° C.
ΔT = temperature
Q= 140 J
Δt = 75 - 60 = 15
mass of the water :
[tex]\tt m=\dfrac{Q}{c.\Delta T}=\dfrac{140}{4.18\times 15}=2.23~g[/tex]
Words made from letters of the alphabet are similar to molecules made from atoms. Based on what you already know about matter, which statement best explains this comparison?
A. Atoms can make many different molecules, just like letters can make many different words.
B. Molecules must contain many different atoms, just like words must contain many different letters.
C. There are 26 different atoms that are used to form molecules, just like there are 26 different letters that are used to form words.
D. There are no rules for how letters combine to make words, just like there are no rules for how atoms combine to make molecules.
To see the number of atoms of an element in a given molecule we need to multiply stoichiometry to the number that is written on the foot of the element that is stoichiometry. The correct option is option A.
What is atom?
Atom is the smallest particle of any element, molecule or compound. Atom can not be further divided. Atoms contains nucleus in its center and electron that revolve around the atom in fixed orbit. Atoms can make many different molecules, just like letters can make many different words.
In the nucleus, proton and neutron are present. Electron has -1 charge while proton has +1 charge. Neutron is neutral that is it has no charge. So overall the charge of nucleus is due to only proton, not by neutron.
Therefore, the correct option is option A that is Atoms can make many different molecules, just like letters can make many different words.
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Convert 3.55 moles Nacl to formula units
Answer:
2.14 x 10²⁴ formula units
Explanation:
Given parameters:
Number of moles of NaCl = 3.55moles
Unknown:
Formula units of NaCl = ?
Solution:
A mole of substance contains the avogadro's number of particles. The number of particles could be protons, atoms, neutrons, formula units etc.
1 mole of substance = 6.02 x 10²³ formula units
3.55 mole of NaCl = 3.55 x 6.02 x 10²³
= 2.14 x 10²⁴ formula units
What is the name for the compound BrCl?
Compound name:
Bromine chloride
Bond type:
Covalent Bond
Reasoning for Bond type:
Formed between nonmetal and nonmetal atoms
Br (Bromine) is a nonmetal. Also, known as a liquid.
Cl (Chlorine) is a nonmetal. Also, know as a gas.
Use this website for more element information:
https://ptable.com/#Properties
will mark brainliest please help!!!
How many joules are released when 30.0 g of H2O(g) condenses at 100°C and cools to 10°C
Heat released : 79086 J
Further explanationCondenses :
1. phase change (gas - liquid) : heat of vaporization (ΔH vap for water = 2260 J/g)
2. cools from 100 - 10 : (Q=m.cΔT)
1. Q=m.ΔH vap
[tex]\tt Q=30\times 2260=67800~J[/tex]
2. Q=mc.ΔT(c water = 4.18 J/g C)
[tex]\tt Q=30\times 4.18\times (100-10)\\\\Q=11286~J[/tex]
Q tot = 67800 + 11286 = 79086 J
A bulldozer does 15,000 J of work lifting dirt 15 m up to get it out of a hole. How much force did the bulldozer use to accomplish this task?
Answer:
The answer is 3000 NExplanation:
The amount of force can be found by using the formula
[tex]f = \frac{w}{d} \\ [/tex]
w is the workdone
d is the distance
From the question we have
[tex]f = \frac{15000}{5} \\ [/tex]
We have the final answer as
3000 NHope this helps you
When baking, the rods in an oven heat up and turn red. This is an example of *
A. an object emitting conduction as its thermal boundary layer is above 0°C.
B. an object emitting radiation as its thermal boundary layer is above 0°C.
C. an object emitting radiation as its temperature is above 0°C.
D. an object emitting conduction as its temperature is above 0°C
Answer:it is convection
Which diagram best represents reciprocal disclosure?
Answer:I think its B
Explanation:
Answer:
B
Explanation:
it is B becuse my teacher told me it is
