Answer:
The answer is
2.0 molesExplanation:
To find the number of moles of an element given the number of entities contained in that element , we use the formula
[tex]n = \frac{N}{L} \\[/tex]
where n is the number of moles
N is the number of entities
L is the Avogadro's constant which is
6.02 × 10²³ entities
From the question
N = 1.204 × 10²⁴ lithium atoms
We have
[tex]n = \frac{1.204 \times {10}^{24} }{6.02 \times {10}^{23} } \\ [/tex]
We have the final answer as
2 molesHope this helps you
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
The rate constant of a chemical reaction depends on which of the following terms?
Answer: B
The temp of the reaction
Explanation:
The rate constant (k ) of all chemical reactions depends on temperature.
MARK ME AS BRAINLIEST
Answer:
B
Explanation:
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
I need help and yeah it's the picture
Answer:
the third one because it matches
There is usually only one correct method that can be used to solve a problem true or false
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
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.
which element has more valence electrons; Rb or Ca?
Answer:
kk
Explanation:
im here
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:
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
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.
A wooden block has a mass of 562 g and a volume of 72 cm 3 . What is the density?
The density of the wooden block is 7.81 g/cm³
Density is related to mass and volume by the following equation:
Density = mass / volumeWith the above formula, we can obtain the density of the wooden block as follow:
Mass of wooden block = 562 g
Volume of wooden block = 72 cm³
Density of wooden block =?Density = mass / volume
Density = 562 / 72
Density = 7.81 g/cm³Therefore, the density of the wooden block is 7.81 g/cm³
Learn more: https://brainly.com/question/24700775
What tool would you use to test for hardness?
Answer: mohs picks
Explanation: hope its what you wanted
Identify whether longhand notation or noble-gas notation was used in each case below. Potassium (K): 1s22s22p63s23p64s1 longhand notation noble-gas notation
Answer:
Longhand Notation
Explanation:
Explanation I just did it. Sorry I know I might be late to answer.
Answer:
the anwser is A or longhand notation
Explanation:
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.
An example of solution is vinegar because it has 5% acid 95% water
True
False
Answer:
true
Explanation:
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.
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
How do the particles in s waves move
Which formula represents a convalent compound
. H2O2
.CaO
.MgS
.NaCl
Answer:
H₂O₂ is a covalent compound
Answer:
Is H₂O₂
Explanation:
So That Answer
work and energy have the same unit why
Answer:
because work is the process of converting energy from one form into another work is a method of transferring energy the amount of work done is the amount of energy transferred so it makes sense to use the same unit hope it helps
Answer:
I'm struggling bbbbbnn
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?
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.
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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What is "Mad Hatter's Disease" ?
Explanation:
Erethism, also known as erethism mercurialis, mad hatter disease, or mad hatter syndrome, is a neurological disorder which affects the whole central nervous system, as well as a symptom complex, derived from mercury poisoning.
Answer:
he became mad due to mercury in the glue he uses for hats it stains hands and the stains make them go mad
Explanation:
Using a ruler to measure the length of a stick is an example of
1) extending the sense of sight by using an instrument
2) calculating the percent of error by using a proportion
3) measuring the rate of change of the stick by making inferences
4) predicting the length of the stick by guessing
Answer:
The answer would be 1) extending the sense of sight by using an instrument.
This is because you are using a ruler (your instrument) to see how long the stick is. It can't be 2) calculating the percent of error by using a proportion, because you aren't calculating the percent of error from the stick. It also can't be 3) measuring the rate of change of the stick by making inferences, because you are using a ruler, making it the exact measurement, not making an inference. It can't be 4) predicting the length of the stick by guessing, because again, you're using a ruler to see the exact measurement of the stick.
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.
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:
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.
