Answer:
C. the lungs where it picks up oxygen again
ITEM BANK: Move to Bottom
Balance
Measured in Newtons
Measured in grams
Property of matter
Spring Scale
Weight
Both
Mass
Cugan 100
drag and drohte
Answer:
The scale reads the tension in the string. The tension in the string is 100 N. This is the force the string must exert up on either of the 100-N weights at either end of the string.
Nothing is moving, nothing is accelerating, so the net force on the spring is zero. Likewise, the net force on either of the 100-N weights is also zero. But that is another question. The spring scale does not measure the net force. The spring scale simply measures the tension, the magnitude of the force exerted by the string.
Explanation:
Question 1
Identify the type of bonding for CaBr2
CaBr2 is an ionic bond. This is because the calcium gives up an electron to each of the chlorine atoms resulting in the calcium becoming Ca2+ ions...
PERIODIC TABLE
What element is located at the period 3, group 13?
Answer:
Aluminiun
Explanation:
Which of these bonds should be classified as ionic?
A.
Na-O
B.
C-S
C.
H-Cl
D.
Be-S
Answer:
Na-O
Be-S
Explanation:
ionic bonds= metal and non metal
Answer:
Na-O
Explanation:
i solved it in study island and i got this answer correct
the question is on the screenshot worth 20 points pls help
Answer:
Cell Y Only
Explanation:
Which elements have two valence electrons?
A. Carbon
B. Magnesium
C. Fluorine
D. Sodium
Answer:
Magnesium
Explanation:
Magnesium is in group 2 of the periodic table. The group in which an element is found in tells us the number of valence eletrons it has.
HOPE THIS HELPED
Among the given elements, the element that have two valence electrons is Magnesium. The correct answer is option B.
Valence electrons are the electrons that are present in the outermost shell of an atom that are involved in chemical bonding. The number of valence electrons an atom has is determined by the group number it belongs to on the periodic table.
Magnesium belongs to group 2A on the periodic table, which means it has two valence electrons.
Carbon belongs to group 4A and has four valence electrons, while Fluorine belongs to group 7A and has seven valence electrons. And Sodium belongs to group 1A and has one valence electron.
Therefore, option B. Magnesium is the elements that have two valence electrons.
Learn more about Valence here:
https://brainly.com/question/31264554
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A ball, starting from rest at Position 1, rolls down and then up a curved track towards Position 5. When it reaches Position 5, it rolls back down the track
2
Which description below is most consistent with what you can expect from the ball's motion?
The ball will roll as high as Position 1 since energy cannot be created or destroyed.
The ball will roll past Position 1 since energy cannot be created or destroyed.
The ball will roll as high as Position 2 since some of the energy will be transformed to heat,
The ball will roll as high as Position 3 since that position has the least potential energy.
Kk
Answer:
D. The ball will roll as high as Position 3 since that position has the least potential energy.
Explanation:
i am not sure that it's is right or wrong
You use a battery to power a small hand-held fan to keep cool in the summer what way is the energy transformed?
Answer:
Chemical to electrical to kinetic energy
Explanation:
In a battery-operated fan, first, the chemical energy stored in the battery is converted to electrical energy within the fan and then the electrical energy, in turn, is converted to kinetic energy which makes the blades of the fan rotate. The rotation of the fan creates a breeze that forces the evaporation of sweat molecules from the surface of the skin and causes cooling in return.
What is chemical potential energy?
A. Energy stored by atoms
B. Energy of motion
C. Energy stored in height differences
D. Energy from gravity
Answer:
the answer is A.
i think:/
Explanation:
Complete the sentence. Select all that apply. A beta particle: is electromagnetic energy is emitted from the nucleus has zero charge has a +2 charge has a -1 charge is an electron
Answer: has a -1 charge
is an electron
is emitted from the nucleus
Explanation:
The beta particle is basically an electron with -1 charge and no mass.
Beta particles are fast-moving electron emitted by radioactive decay of substances. Beta particles have a charge of - 1, and a mass of about [tex]\frac{1}{2000}[/tex] th of a proton. This means that beta particles are the same as an electron.
A beta particle, also called beta ray or beta radiation [tex](\beta)[/tex], is a high-energy, high-speed electron or positron emitted by the radioactive decay of an atomic nucleus during the process of beta decay.
A beta particle is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.
What happens when liquid changes to gas?
1.Added heat makes water molecules move fast enough to overcome the attraction
between them
2. Heat causes molecules to speed up and merge together (Which one?)
Answer:
#1
The temperature that this happens is called the freezing point and is the same temperature as the melting point. As more energy is put into the system, the water heats up, the molecules begin moving faster and faster until there is finally enough energy in the system to totally overcome the attractive forces.
Explanation:
#2
Heating a liquid increases the speed of the molecules. An increase in the speed of the molecules competes with the attraction between molecules and causes molecules to move a little further apart. ... A decrease in the speed of the molecules allows the attractions between molecules to bring them a little closer together.
1. What do you observe when you poor a hot into the glass
containing intant coffee?
Answer:
The water in glass turns dark brown.
This is due to diffusion where the coffee molecules move from the region of their high concentration to a region of their lower concentration in water.
Answer:
The instant coffee acts as a solute when hot water (the solvent) is poured. The instant coffee quickly dissolves and makes a solution.
Explanation:
The only way to see the far side of the moon is
Answer:
Only one side of the spherical Moon is ever visible from Earth it wasn't until 1959 when the Soviet Spacecraft Luna 3 orbited the Moon and sent pictures home that human beings were able to see the "far side" of the Moon for the first time. A phenomenon called tidal locking is responsible for the consistent view
Type the correct answer in the box, Express the answer to three significant figures. Given: N2 + 3Cl2 + 2NC3, AH = 464 kJ/mol Use the given bond energies and the periodic table to calculate the energy change in the reaction. The AH when 85.3 grams of chlorine reacts in the given reaction is kilojoules.
Answer:
The given chemical reaction is:
Δ∑BE(reactants)-∑BE(products)
= {(941 kJ/mol) + (3 * 242 kJ/mol)} -[{2*(3*200 kJ/mol)}]
= 467 kJ/mol
Calculating the change in heat when 85.3 g chlorine reacts in the above reaction:
Moles of chlorine =
= 1.20 mol
Heat change when 1.20 mol chlorine reacts
=
Explanation:
Answer:
He is right tho not gone hold you
Explanation:
Compare and contrast The two methods of making alcohol
Answer:
The table compares making ethanol by hydration of ethene (ethene and steam) to making ethanol by fermentation (sugar from plant material).
I need help really bad with this!!!
For the following:
Highlight each subscript in RED.
Highlight each coefficient in BLUE.
H2O 5Cl2 2Mg 3H2O2
For the following
List the chemical symbols of each element.
Give the number of atoms of each element.
HCl CO2 Na2SO4
Balance the following chemical equations.
1. Cu2O + C → Cu + CO2
2. H2O2 → H2O + O2
Al + Fe3N2 → AlN + Fe
4. Ag2S → Ag + S8
5. ZnS + AlP → Zn3P2 + Al2S3
6. Fe(OH)3 → Fe2O3 + H2O
Given the two chemical equations, highlight in RED the one that is balanced.
7. a. 2Na + Cl2 → 2NaCl
b. 2Na + 2Cl2 → 2NaCl
8. a. C3H8 + 5O2 → 3CO2 + 4H2O b. 2C3H8 + 5O2 → 3CO2 + 8H2O
9. a. 2NH3 + 5O2 → 2NO + 3H2O b. 4NH3 + 5O2 → 4NO + 6H2O
10. a. Y(NO3)2 + GaPO4 → YPO4 + Ga(NO3)2
b. 2Y(NO3)2 + 2GaPO4 → 2YPO4 + Ga(NO3)2
Answer:
Did u get the answers
Explanation:
If the temperature of a gas increased from 100 K to 200 K and the volume of a gas decreased from 20 L to 10 L, what is the new pressure if the original pressure was kPa?
Answer:
320pka
Explanation:
This is a complete question;
If the temperature of a gas increased from 100 K to 200 K and the volume of a gas decreased from 20 L to 10 L, what is the new pressure if the original pressure was 80kPa?
EXPLANATION;
Gas laws can be regarded as aws which relate the pressure, volume, as well as temperature of a gas. It can be expressed as
P1V1/T1 = P2V2/T2
Where
V1= initial volume= 20L
V2 = final volume= 10L
T1 = initial temperature= 100K
T2 = final temperature= 200K
P2=final pressure=
P1= initial pressure= 80pka
Making P2 subject of the formula from the eqn, we have
P2= (P1*V1*T2=)/(T1*V2)
If we substitute the values we have
P2= (80 × 20×200)/(100×10)
P2= 320pka
Hence, the new pressure is 320pka
Which of the following correctly lists the levels of organization from most complex to least complex? *
Community, Organism, Population, Ecosystem
Ecosystem, Community, Population, Organism
Population, Community, Ecosystem, Organism
Organism, Population, Community, Ecosystem
Answer:
The last option.
Explanation:
You can immediately eliminate the other options as an organism is clearly the least complex. Only one option begins w/ 'organism'.
Answer:
Its def A, if this helped subscribe to amiredagoat Yt
Explanation:
What kind of fossil is made when a creature is buried under sediment and as that sediment forms into rock the hard materials like bones of the organism are formed into the rock?
Answer:
Mold fossil
Explanation:
It's called a mold fossil because they are formed when sediments bury an organism and then the sediments are changed into rock; then the organism decays thereby leaving a cavity in the shape of the organism
Balance this equation by filling in the missing coefficient: 6 CO2 + 6 H2O + Sunlight = C6H12O6 + ?? O2
A. 1
B. 6
C. 12
D. 36
Given that,
The equation is : [tex]6CO_2+6H_2O+\text{sunlight}\rightarrow C_6H_{12}O_6+?O_2[/tex]
To find,
The missing coefficients.
Solution,
[tex]6CO_2+6H_2O+\text{sunlight}\rightarrow C_6H_{12}O_6+?O_2[/tex]
Let the value of ? is x.
It is the equation of photosynthesis.
In LHS,
Carbon atoms = 6
Hydrogen atom = 12
Oxygen atom = 18
In RHS,
Carbon atoms = 6
Hydrogen atom = 12
Oxygen atom = 6
If we make the equation as [tex]6CO_2+6H_2O+\text{sunlight}\rightarrow C_6H_{12}O_6+6O_2[/tex]
No the number of atoms in RHS = 6+ 12 = 18
It means if we take the value of ? as 6 the equation will be balanced.
Hence, the correct option is (B) "6".
find the co valance of c in C2S2
Answer:
A better term than
covalency
might be
molecularity
. Molecular species TEND to have reduced melting points and boiling points with respect to non-molecular species. Non molecular species, which include sodium chloride, and graphite, and diamond, thus have much HIGHER melting points than methane or ethane, or water, which are composed of discrete molecules.
Explanation:
pls helpppp
Is the law of conservation of mass observed in each equation?
1. 2KClO3=2KCl+3O2
2. CaCO3+2HCl=CaCl2+H2O+CO2
Answer:
its c my guy
Explanation:
After two alpha decays, Carbon-14 will become?
Answer:
Becomes Nitrogen-14
Explanation:
True or False: The moon does not have an
atmosphere, plants, animals or oceans.
Answer:
true
Explanation:
As mentioned above, the moon does not have the same composition as the Earth, and while some of the elements present on the moon are the same, this is likely because of the moon’s formation (the Giant-Impact Theory). In general, this different in composition means that the moon cannot have an atmosphere because it is not geologically active.
what are all the populations of different species that live in the same area at the same time
Answer:
The answer is Community
Explanation:
please help! 35 points for a valid answer!
how is the potential (voltage) of a redox reaction determined using the reduction potential chart calculate the voltage for the equation in 3(a)
Answer:
Oxidation half reaction is written as follows when using using reduction potential chart
example when using copper it is written as follows
CU2+ +2e- --> c(s) +0.34v
oxidasation is the loos of electron hence copper oxidation potential is as follows
cu (s) --> CU2+ +2e -0.34v
Explanation:
Answer:
The potential difference is caused by the ability of electrons to flow from one half cell to the other. Electrons are able to move between electrodes because the chemical reaction is a redox reaction. ... The cell potential (Ecell) is measured in voltage (V), which allows us to give a certain value to the cell potential.
Explanation:
What is the name of the compound NS2
Answer:
I believe what your looking for is Nitrogen disulfide
Explanation:
Hope this helps (:
What is a part's structure related to?
state modern periodic law ?arrange the element of halogen family in the increasing order of their number of Shell ?what type of Bond formation exists between the element of group 1 and 17 and why?
Answer:
Modern periodic law states that the properties of elements are dependent on their atomic numbers and elements show similar properties at regular interval of increasing atomic number.
Question 2 :FluorineChlorineBromineIodineAstatine Question 3 :3. Ionic Bond .
Reason : The elements from Group I are metals ( they lose electrons )
The elements from Group 17 are non-metals ( they Gain electrons
PWEaseee help mweee ill mark brainliest I just need the answer pls and thank you amazing people