You can't make observation because the minimum mass is not reached
Further explanationThe atomic nucleus can experience decay into 2 particles or more due to the instability of its atomic nucleus.
Usually radioactive elements have an unstable atomic nucleus.
The main particles are emitted by radioactive elements so that they generally decay are alpha (α), beta (β) and gamma (γ) particles
General formulas used in decay:
[tex]\large{\boxed{\bold{N_t=N_0(\dfrac{1}{2})^{t/t\frac{1}{2} }}}[/tex]
T = duration of decay
t 1/2 = half-life
N₀ = the number of initial radioactive atoms
Nt = the number of radioactive atoms left after decaying during T time
Nitrogen-16 has a half-life of 7.1 s, so t1/2 = 7.1 s
T=duration of decay = 57 s
No= initial sample = 100 g
Nt expectes(at least) : 0.5 g
Amount of Nt after 57 s :
[tex]\tt Nt=100.\dfrac{1}{2}^{57/7.1}\\\\Nt=0.383~g[/tex]
So you can't make observation(0.383 < 0.5)
In air, a silver object can tarnish due to the reaction of silver with hydrogen sulfide, a gas found in the air as a result of certain biological processes. ___Ag (s) + ___H2S (g) -----> ___ Ag2S (s) + ___ H2 (g) When this equation is balanced, what is the coefficient of Ag?
Answer:
The coefficient of Ag is 2.
Explanation:
___Ag (s) + ___H₂S (g) ⇒ ___ Ag₂S (s) + ___ H₂(g)
The Law of Conservation of Matter is also called the law of conservation of mass or the Law of Lomonósov-Lavoisier. This law postulates that "the mass is not created or destroyed, only transformed." This means that the reagents interact with each other and form new products with physical and chemical properties different from those of the reagents because the atoms of the substances are ordered differently. But the amount of matter or mass before and after a transformation (chemical reaction) is always the same, that is, the quantities of the masses involved in a given reaction must be constant at all times, not changing in their proportions when the reaction ends.
In others words, the law of conservation of matter states that since no atom can be created or destroyed in a chemical reaction, the number of atoms that are present in the reagents has to be equal to the number of atoms present in the products.
Then, you must balance the chemical equation. For that, you must first look at the subscripts next to each atom to find the number of atoms in the equation. If the same atom appears in more than one molecule, you must add its amounts :
Left side: 1 Ag, 2 H and 1 S
Right side: 2 Ag, 2 H and 1 S
The coefficients located in front of each molecule indicate the amount of each molecule for the reaction. This coefficient can be modified to balance the equation, just as you should never alter the subscripts.
By multiplying the coefficient mentioned by the subscript, you get the amount of each element present in the reaction.
You can see that the elements H and S are balanced because we have the same quantity on both sides of the reaction. Then you must balance the Ag, so the reaction is:
2 Ag (s) + 1 H₂S (g) ⇒ 1 Ag₂S (s) + 1 H₂(g)
Now you have:
Left side: 2 Ag, 2 H and 1 S
Right side: 2 Ag, 2 H and 1 S
So, you have the same amount of each element to both of the reaction and this is balanced.
Then, the coefficient of Ag is 2.
why does oil and water have different properties
Answer:
Due to their densities.
Explanation:
Answer:
Liquid water is held together by hydrogen bonds. (Liquid water has fewer hydrogen bonds than ice.) Oils and fats not have any polar part and so for them to dissolve in water they would have to break some of water's hydrogen bonds. Water will not do this so the oil is forced to stay separate from the water.
Explanation:
Could i have branliest and heart with 5 stars
Thanks!
someone help with this pls
Answer:
12 B
13
0.00100176
Explanation:
7.62 x 10^23 molecules of CO2 are contained in a tire. How large is the tire (in liters)?
Answer: 7.62e+23
Explanation:
Charlotte completed an experiment in which she investigated and discovered that an electrically charged object can attract an uncharged object without any contact. She used a PVC pipe and small pieces of paper for her experiment. Each time, she rubbed the PVC pipe with a cloth to give it a charge and then held it over paper. What would be Charlotte's control group in this experiment?
A Using the cloth and rubbing it against the PVC pipe
B Taking the pieces of paper and rubbing it against the cloth
C Not rubbing the cloth against the PVC pipe or the paper
D Rubbing the cloth against both the paper and the PVC pipe
Answer:
it is c
Explanation:
Ions can be made by single element or covalently bonded group of elements. The covalently bonded group of elements is called polyatomic ions or polyatomic atoms. Therefore the Charlotte's control group in this experiment is not rubbing the cloth against the PVC pipe or the paper. The correct option is option C.
What is Ions?Any species that contain charge whether it is positive charge or negative charge is called ions. The example of polyatomic ions are sulfate, phosphate, nitrate etc.
Cation is the species that loose electron and attain positive charge while anion is a species which gain electron and attains negative charge so when anion and cation combine in fixed ration the the overall charge of the molecule is zero that is molecule is neutral, the charge over cation and anion is also called oxidation state. The Charlotte's control group in this experiment is not rubbing the cloth against the PVC pipe or the paper.
Therefore the Charlotte's control group in this experiment is not rubbing the cloth against the PVC pipe or the paper. The correct option is option C.
To learn more about ions, here:
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What causes an earthquake to happen?
A. O Rocks deform slowly as a result of physical stress.
B. O Rocks along a fault move suddenly and release energy.
C. Large amounts of rock suddenly shift downward when large holes form
underground
D. O Energy is transferred to rock layers from convection currents in the oceans
and the atmosphere.
Help i need an answer
Answer:
4 i think
Explanation:
How many bonds does silicon tetrachloride, SiCl4 have?
Is a tooth made out of matter or not matter?
Human teeth are made up of four different types of tissues.
Where is nature can you find isomers?
11 points!!!
Answer:
Isomers are defined as the molecules or polyatomic ions which have similar molecular formula but different in arrangements of atoms.
Isomers can be found in food items carrying glucose (C6H12O6), galactose or fructose, they all have the same chemical formula but differ structurally and chemically.
Glucose is found in vegetables and milk, galactose found in dairy products, and Fructose is found in fruit juices.
Pls help me ASAP thank you!!
Mechanical waves travel through a ________________________ and
Electromagnetic waves can travel through _____________________.
Answer:
Mechanical waves travel through a medium and
Electromagnetic waves can travel through air and solid materials, but also through the vacuum of space.
Explanation:
The elements mercury and bromine are both liquids at room temperature, but mercury is considered a metal, and bromine is considered a non-metal. How can that be? Explain using properties you know of.
Answer:
At room temperature, mercury and bromine are of fluid consistency, it is because their melting or melting temperature is very low, so low that it reaches room temperature.
Compared to mercury and other metals, the more traditional metals have much higher melting temperatures.
On the other hand, bromine is not a metal, since it does not have the ability to oxidize with the presence of oxygen and also does not give up electrons.
Explanation:
Mercury in the periodic table is Hg, and bromine is Br
Which of the following is a balanced chemical equation?
Answer:
equation number 3 is balanced.
hope it helps ☺️!
Which of these statements accurately describes monomers?
Monomers are macromolecules.
Monomers contain double bonds.
Monomers are made of repeating units.
Monomers contain bonds between metals.
Answer:
Monomers contain bonds between metals
Answer:
B: Monomers contain double bonds
Explanation:
I got it right on Edge
In what way does the shape of a molecule affect how the molecule is
involved with living systems?
OA. It determines the weight of the molecule.
OB. It determines how the molecule functions.
O C. It determines oxidation states present in the molecule.
OD. It determines what elements are in the molecule.
Answer:
B
Explanation:
I'm not 100% sure, but B seems like the most likely answer because the shape of a molecule usually is a major factor in how molecules interact with each other.
I hope that helps.
The pictures above show a gerbera daisy that has experienced a change called wilting. Which of the statements below best describes what has happened from Picture A to Picture B?
Answer:
a
i just had this
Answer:
A. water entering the plant. thats the one
Explanation:
What is the first stroke of a 4 stroke cycle?
A. intake
B. exhaust
C. compression
D. power
Answer:
Intake
Explanation:
It is the very first thing you do.
Figure 4: Four-Stroke Cycle In the first stroke, also known as the Intake Stroke or Induction, the piston travels from the top dead centre (TDC) to the bottom dead centre (BDC) with the intake valve open and exhaust valve closed. This creates a vacuum due to the increase in volume in the combustion chamber.
The stroke cycle is used in the operating cycle of gasoline or petroleum engines. The first stroke in the 4 stroke cycle is intake. Hence, option A is correct.
What is stroke cycle ?An internal combustion (IC) engine is referred to as having four strokes when the piston is rotating the crankshaft. A stroke refers to the whole journey of the piston along the cylinder, in either direction.
In gasoline/petrol engines, a four-stroke cycle is used. The four strokes are intake (1), compression (2), power (3), and exhaust (4). The intake port is on the right's blue side, and the exhaust port is on the left's brown side.
The piston head is surrounded by a thin sleeve called the cylinder wall, which provides a space for the combustion of fuel and the production of mechanical energy. Therefore, the first stroke of a 4 stroke cycle is intake.
Find more on stroke cycle:
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A bike rider approaches a hill with a speed of 8.5 m/s. The total mass of the bike and the rider is 85 kg. Find the kinetic energy of the bike and the rider. If the rider coasts up the hill calculate the height at which the bike will come to a stop. (h=PE/mgh)
Please help me!! this is due in like 20 minutes!!
KE=3070.625 J
Height = 3.686 m
Further explanationmass of bike+rider=85 kg
velocity = 8.5 m/s
[tex]\tt KE=\dfrac{1}{2}mv^2\\\\KE=\dfrac{1}{2}\times 85\times 8.5^2\\\\KE=3070.625~J[/tex]
Conservation of energy :
(KE+PE)₁ (downhill) = (KE+PE)₂ (up the hill)
PE₁=0⇒h=0
KE₂=0⇒v=0(stop), so equation becomes :
KE₁=PE₂
[tex]\tt KE_1=3070.625\\\\KE_1=mgh_2\\\\3070.625=85\times 9.8\times h\Rightarrow h=3.686~m[/tex]
In the Periodic Table, the vertical columns that extend down the Periodic Table are called
A. periods.
B. Groups.
C: Classes
D: Rows
Answer:
b
Explanation:
What is the process called when a solid becomes a liquid?
melting
freezing
condensing
boiling
the answer is melting
Answer: melting :)
Explanation:
GIVING BRAINIEST FIVE STARS AND HEART!
Please define the following term in your own words!
law of conservation of matter
Answer:
Matter cannot be created destroyed
Explanation
Matter can change form through physical and chemical changes, but through any of these changes, matter is conserved. The same amount of matter exists before and after the change—none is created or destroyed. This concept is called the Law of Conservation of Mass.
aluminum hydroxide + sodium nitrate reaction type
Answer:
.
Explanation:
Define strong base?
List 3 solutions to California’s worsening wildfires.
The atomic notation for a particular atom of boron is 11/5 B. The atomic number is while the mass number is_, while the mass number is_.
The atomic number=5
The mass number=11
Further explanationIn the following element notation,
[tex]\tt \large {{{A} \atop {Z}} \right X}[/tex]
X = symbol of elemental atom
A = mass number
= number of protons + number of neutrons
Z = atomic number
= number of protons = number of electrons, on neutral elements
So for The atomic notation for a particular atom of Boron :
₅B¹¹
Z=5=atomic number
A=11=mass number
Please help! Its for chem
Answer:
can you give me more info
Explanation:
i think it d or c
i got charts to help
can someone help with with some answers?! :-) please! i need this done in a hour :-( help!!
What is the formula to calculate speed?
O S= t/d
O S=d/t
OS=dxt
O S=txd
Answer:
the formula to calculate speed is d/t.
What do you think causes a lunar eclipse? (Use your knowledge of solar eclipses and feel free to run the Gizmo to help you.)
Moon reflects the light frim the sun, thats why we are able to see it and it shines in the night. But, we know that Earth revolves around Sun and Moon revolves around Earth. During this revolution, Earth and Moon comes in a position when Earth is in the middle of the Moon and Sun. So, it blocks the light of Sun frim reaching Moon. Hence, we see no reflection and it causes Lunar eclipse.
Answer:
A total lunar eclipse occurs when the moon and the sun are on exact opposite sides of Earth. Although the moon is in Earth's shadow, some sunlight reaches the moon. The sunlight passes through Earth's atmosphere, which causes Earth's atmosphere to filter out most of the blue light.
Explanation: