Answer:
VC = 18
Explanation:
Since L is the midpoint and you have LV, you know that LC is also 9.
why is helium heavier than hydrogen
Answer:
because it's has an additional electron. hydrogen is just made up of one proton
what happens before, during, and after a chain reaction.
A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. The process may be controlled (nuclear power) or uncontrolled (nuclear weapons).
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The Density of this log is 1.75g/cm3. If we cut this log in half, what is the density of the log? Make sure to show your work and explain your answer.
Answer:
The density remains the same
Explanation:
The density remains the same because cutting the object in half will divide the mass & volume by the same amount. The density cant be changed no matter what happens to it.
Changes in a state of matter include?
Answer: melting, freezing, sublimation, deposition, condensation, and vaporization
Which of the following has 62 neutrons, 46 protons, and 46 electrons?
An ice cube has a volume of 12cm3 and a mass of 11g. What is the density of the ice?
Answer:
find the volume of the ice cube then using the formula density=mass over volume calculate the density okay
The density of the object is mass per unit volume. Density is directly proportional to mass and inversely proportional to volume. . The density of the object is 0.916 g/ cm3
What is density?Density is defined as mass per unit volume of the object. If the mass of the object increase then the density will increase. If the volume of the object decrease then the density will increase.
Density = Mass / volume
= 11 g/ 12 cm3
= 0.916 g/ cm3.
Therefore, The density of the object is mass per unit volume. Density is directly proportional to mass and inversely proportional to volume. The density of the object is mass per unit volume. The density of the object is 0.916 g/ cm3.
To learn more about density, refer to the link:
https://brainly.com/question/15164682
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How is aluminum an example of extensive
property?
Answer:
If the property depends on the amount of matter present, it is an extensive property. The mass and volume of a substance are examples of extensive properties; for instance, a gallon of milk has a larger mass and volume than a cup of milk.
Explanation:
Which formula represents a convalent compound
. H2O2
.CaO
.MgS
.NaCl
Answer:
H₂O₂ is a covalent compound
Answer:
Is H₂O₂
Explanation:
So That Answer
11. A 150 gram sample of radon-222 goes through alpha decay. The half-life of
radon-222 is 3.82 days. How much radon will be left after 3.82 days?
Answer:
The correct answer is - 75 grams.
Explanation:
Half-life is the amount of time that is used by the given amount of substance or element to make it half of the initial amount of a particular radioactive substance.
Equation for alpha decay for radon
[tex]^222_{86}Rn\Rightarrow^{218}_{84}Po [/tex]
we need to calculate the left amount of radon after given time
using formula half life
[tex]N(t)=N_{0}e^{-\lambda t}[/tex]
[tex]\lambda =\dfrac{0.693}{3.82}[/tex]
[tex]\lambda=0.1814[/tex]
[tex]N(3.82)=150\times e^{-0.1814\times3.82}[/tex]
[tex]N(3.82)=75.0\ g[/tex]
Thus, the left amount of radon is - 75 grams.
Baby steps in science occur small bits of__ gradually accumulate
Answer:
Baby steps in science occur small bits of__ gradually accumulate
Explanation:
Baby steps in science occur as small bits of evidence gradually accumulate. The evidence lets scientists refine and expand on earlier ideas.
does changes in state of matter indicate a chemical change.
Answer:
No, changes in matter are physical changes.
Explanation:
Can someone help me with this ASAP?
How many energy levels does the element helium have?
I appreciate the help!
The fictional element, marvellium has 4 isotopes with mass numbers of 21, 22,24, and 28 amu. Each isotope is found in equal amounts in nature. What number is closest to the average atomic mass of marvellium
Answer:
The answer to that question is 24 AMU.
Explanation:
I know this because i got the answer correct on the quiz. To get the average, you just add the 4 atomic masses given to you together then divide by 4.
There is usually only one correct method that can be used to solve a problem true or false
Which two particles are always found in equal number in neutral atoms
Answer:
When an atom has an equal number of electrons and protons, it has an equal number of negative electric charges (the electrons) and positive electric charges (the protons). The total electric charge of the atom is therefore zero and the atom is said to be neutral.
Answer:
protons and electrons
Explanation:
A P E X
what families do you have in your chart
Answer:
Families in chart is offsprings made from molecules
Explanation:
Because babies are made from the offspring on which your eye colors,hair colors and etc.
What are the parts of an electron configuration: 1s22s22p63s2 ?
1,2,3 = shell?
s, p =
2,2,6,2 =
Explanation:
electronic confirmation=1s^2,2S^2,2P^6,3S^2
atomic no.is 12 therefore :- this is magnesium
Period=3
Block=s-block
Group=II A
What elements were formed in Nuclear fusion?
Answer:
tritium and deuterium are combined and result in the formation of helium
which element has more valence electrons; Rb or Ca?
Answer:
kk
Explanation:
im here
6. I have a mixture of tomato sauce,
sugar, and carrots. I bring a
magnet close by. What does the
magnet pick up and what is left
behind?
Answer:
All the items in the mixture will not be picked up by the magnet and therefore, all of them would be left behind
Explanation:
Ferromagnetic materials are materials that can become magnetized and are also readily attracted to a magnet or by a magnetic field. Examples of ferromagnetic materials includes, iron, cobalt, and nickel, and their alloys
Ferromagnetic materials are mainly metals while all materials exhibit some form of magnetism including diamagnetism and paramagnetism, but these are not the type of magnetism seen in everyday life
Therefore, since neither of the tomato sauce mixture, the sugar or the carrots are not ferromagnetic materials none of them will be picked up by the magnet.
Is Air considered matter? Why or why not?
Answer:
Yes, air is matter because it is a gas composed mostly of nitrogen, oxygen, and argon, and gases do have mass because they’re molecules bouncing around a contained volume (here, the atmosphere). Water vapor, mixed in to some extent with air, is also a gas and therefore has mass.It takes up space and volume
Explanation:
Air is matter because:
It takes up space
It has mass
And it is composed of particles.
Determine the Molar mass of NI3
Answer:
The molar mass of [tex]NI_{3}[/tex] is 394.719 g/mol.
Explanation:
This was on my periodic table.
Metamorphic rocks can form from other metamorphic rocks. t or f
Answer:
True
Explanation:
The process could repeat it self and the outcome would stay the same.
If a 91.3 g piece of aluminum has a density of 2.7 g/cm3, what is its volume in cubic centimeters?
Answer:
The answer is 34 cm³Explanation:
The volume of a substance when given the density and mass can be found by using the formula
[tex]volume = \frac{mass}{density} \\ [/tex]
From the question
mass of aluminum = 91.8 g
density = 2.7 g/cm³
It's volume is
[tex]volume = \frac{91.8}{2.7} \\ [/tex]
We have the final answer as
34 cm³Hope this helps you
The atomic weight of iodine is less than the atomic weight of tellurium. However, Mendeleev listed iodine after tellurium in his original periodic table because he suspected the atomic weights for these elements were inaccurate. What was Mendeleev's reason for this suspicion?
Answer:
The reason for the suspicion was because the manner in which iodine reacted chemically as well as its other chemical properties, indicated that it belonged in the same group as chlorine and bromine, while the much heavier tellurium should be placed in the previous group
The suspicion was proved to be correct when the atomic number of tellurium was found to be 52 and that of iodine was found to be 53 by later scientists
Explanation:
which example is a body fossil
(A) an ornithopod track
(B) shrimp burrow
(C) dinosaur footprint
(D) dinosaur bone
Answer:
dinosaur bone
Explanation:
fossils are remains from a certain organism or trace of any living thing from the past.
Answer:
D Dinosaur bone
Explanation: I took the quiz
The nucleus of the cell
a
Is found inside the chloroplast
b
Is found inside the membrane of a bacterial cell
c
contains DNA and controls the cell's activities
Answer:
c
Explanation:
it is c because that is the andwer
78 POINT PLEASE HELPPP!!!!Which energy source is a nonrenewable resource?
O oil
O sun
O trees
O wind
Answer:
Oil?
Explanation:
Answer:
oil
Explanation:
its nonrenewable
Which gas is used by humans in process of cellular respiration
Answer:
Humans use Oxygen or O2 to begin the process of cellular respiration, and then when this process is finished it gives of carbon dioxide or Co2
Explanation:
Answer:
oxygen is used by human in the process of cellular respiration
Explanation:
because cells uses oxygen to break down sugar
A chemical reaction that has the general formula of AB + CB + Als best classified as a
reaction.
8
Replacement I think, hope this helps ;)
Explanation:
Answer:
Replacement
Explanation:
