Answer: The atomic symbol represent an isotope that undergoes radioactive decay to produce Pb-206 can be, Polonium (Po).
Two atoms interact with each other and change as shown by the equation Complete the equation by filling in the missing parts.
Answer: the missing parts are ³₂He
Explanation:
The equation shown represents a nuclear reaction, meaning that, instead of the two hydrogen atoms form a molecule by a chemcial bond between the electrons of the atoms, the nuclei of the two interacting atoms change, leading to a new kind of atoms and particles.
That is mainly indicated by the appearace of the particle ¹₀ n, which is the symbol for a neutron. The superscript 1 to the left of the symbol (letter n) means that the mass number of the neutron is 1, and the subscript 0 to the left of the symbol means that the atomic number of neutron is 0.
To determine the symbol, superscript and subscript needed to complete the missing parts of the equation, you need to do a mass number and atomic number balance.
Mass number balance:
The mass number is the superscript to the left of the symbol of the atom.
Each hydrgogen atom, in the reactant side, contributes a mass number 2, and the neutron on the product side contributes a mass number 1, so the balance is:
2 + 2 = x + 1,
from which you determine that the unknown mass number is x = 4 - 1 = 3.
Atomic number balance
The atomic number is the subscript to the left of the element.
Each hdyrogen atom contributes an atomic number 1, and the neutron contributes 0 atomic number. So, the atomic number balance is:
1 + 1 = x + 0 ⇒ x = 2.
Hence, the unknown atomic number is 2.
Conclusions:
The atomic number of the unknown element is 2, meaning that it has 2 protons.
In a periodic table you find that the element with atomic number 2 is helium, whose symbol is He.
The mass number of this atom of helium is 3, which implies that it has 3 - 2 = 1 neutron.
Using the corresponding notation, the complete equation is:
²₁ H + ²₁ H → ³₂He + ¹₀ p
hope this helps
A balloon is filled with 100.0 Lair at 1.300 atm pressure. what pressure is needed to change the volume to 25.00 L
Answer:
4 atmospheric pressure is needed to get a volume of 25 litres
The Asian long-homed beetle can infect a variety of tress such as maple trees and elm trees. These beetles eat the inside of an
infected tree and destroy the pathways that water and nutrients travel through to get from the roots to the rest of the tree. This results
in the tree becoming sick and eventually dying.
A cargo ship canying Asian long-homed beetles introduces the species into a region where the beetles were not previously present
This region has a diverse population of maple and elm trees. How will humans in the area likely be impacted?
OA. The housing industry will be negatively impacted due to an increase in lumber costs.
OB. The maple syrup industry will be negatively impacted due to a decrease in the maple population
OC. The lumber industry will be negatively impacted due to a decrease in available resources.
OD. all of
Answer: The answer to your question is OD
Hope this helps.
Answer:
The answer is D, all of these.
Explanation:
The person above was right ^^
In a chemical reaction, when particle size is reduced, the rate of reaction increases because of increased surface area of the
reactants.
Why would increased surface area increase reaction rate?
-0)
A)
It increases the number of collisions among particles.
B)
It decreases the activation energy.
It increases the concentration.
D)
It decreases the temperature.
Answer:
option A
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An increased surface area would increase the reaction rate because it increases the number of collisions among particles.
What is rate of a reaction?Rate of a reaction is the speed or length of time it takes for a reaction to take place.
The rate of a chemical reaction can be affected by the following:
Increase in surface area of reactantsIncrease in temperatureAccording to this question, when particle size is reduced, the rate of reaction increases because of increased surface area of the reactants.
This is because the increase in surface area increases the number of collisions among particle.
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Hypothesis for candy bar density lab
Need answer ASAP!!!!!
A solid substance turns directly into a gas. Which term describes this change?
deposition
evaporation
melting
sublimation
Answer:
sublimation
Explanation:
Deposition is like dew forming
evaporation is going from liquid to gas
melting is going form solid to liquid ( like ice does when it warms)
sublimation is going from solid directly to gas ( like moth balls)
What is a large area of air with the same temperature?.
Sorry this is late but it would be the air mass
Hope this halpes :))
A sample of methane occupies 3. 0 L at 200. C and 1. 4 ATM. What is the volume of the gas at STP?
Answer:
2.42 liters
Explanation:
P1V1/T1 = P2V2/T2 T 'S are in K
STP is 273.15 K and 1 atm
1.4(3) / 473.15 = (1) ( V) /273.15
V = 2.42 liters
Which is not a property of bases Group of answer choices react with metals to produce hydrogen gas react with acids to form a salt and water bitter taste slippery feel
Answer:
react with metals to produce hydrogen gas
Explanation:
NaOH is a common base and is a strong base. Look what happens with it reacts with a metal:
OH- (aq) + Li(s) --> LiOH. It forms a salt not H2
(I removed spectator ions)
A nearly complete skeleton, ____ is a classic example of a Neanderthal with many defining Neanderthal characteristics. Group of answer choices Taung Child La Ferrassie 1 Piltdown Man KNM-ER 1805
Answer: La Ferrassie 1
Explanation: La Ferrassie 1, often referred to as LF1, is a male Neanderthal skeleton estimated to be 70–50,000 years old. It was discovered at the La Ferrassie site in France by Louis Capitan and Denis Peyrony in 1909. The skull is the most complete Neanderthal skull ever found.
If the mass of the electron were magically doubled, would the ionization energy of hydrogen increase, decrease, or stay the same?.
Answer:
The ionization energy would increase
Explanation:
because the increased mass would mean the electron would orbit closer to the nucleus and would require more energy
Divers get "the bends" if they come up too fast because the gas in their blood expands, forming bubbles in their blood. If a diver has 5.0 mL of gas in his blood under a pressure of 250. atm then rises instantaneously to a depth where his blood has a pressure of 50.0 atm, what will the volume of gas in his blood be?
Solve without converting volume into dm³ as it will led into same answer
According to Boyles law
P1V1=P2V25(250)=50V21250=50V_2V_2=25mLAccording to Boyle's law, the volume of gas in his blood will be 25 ml at constant temperature.
What is Boyle's law?
Boyle's law is an experimental gas law which describes how the pressure of the gas decreases as the volume increases. It's statement can be stated as, the absolute pressure which is exerted by a given mass of an ideal gas is inversely proportional to its volume provided temperature and amount of gas remains unchanged.
Mathematically, it can be stated as,
P∝1/V or PV=K. The equation states that the product of of pressure and volume is constant for a given mass of gas and the equation holds true as long as temperature is maintained constant.
According to the equation the unknown pressure and volume of any one gas can be determined if two gases are to be considered.That is,
P₁V₁=P₂V₂
substitution gives V₂=250×5/50=25 ml.
Therefore, the volume of gas in his blood will be 25 ml at constant temperature.
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The combustion of propane (C3H8) produces CO₂ and H₂O:
C₂H8 (g) +5O₂ (g) → CO₂ (g) + 4H₂O(g)
The reaction of 5.5 mol of O₂ will produce ____ mol of H2O
Answer:
4.4 moles of water
Explanation:
Propane is C3H8. Is the chemical equation, you wrote C2H8 which is wrong. Type everything properly and give a check before finally posting the question.
The chemical equation that is given, is not properly balanced. The BALANCED equation would be
C3H8 + 5O2 → 3CO2 + 4H2O
From this balanced chemical equation, we see that 5 moles of oxygen produce 4 moles of water.
5 moles of Oxygen → 4 moles of water
1mole of oxygen → [tex]\frac{4}{5}[/tex] moles of water
5.5 moles of oxygen → ([tex]\frac{4}{5}[/tex] × 5.5) moles of water = 4.4 moles of water
∴ The reaction of 5.5 mol of O2 will produce 4.4 mol of H2O. [Answer:]
Answer:
5.5
Explanation:
First, you will need to balance the equation ( the equation in your question is not balanced....typo?)
C2 H8 + 4 O2 ===> 2 CO2 + 4 H2O
Now, from the balanced equation:
O2 : H2O = 4/4 = 1/1
SO 5.5 MOLES OF O2 PRODUCES 5.5 MOLES H20
if the theoretical yield is 27.71 g and the actual yield is 20.02 g what is the yield?
What's the name of this molecule?
Answer:
option d
Explanation:
An aqueous solution has a hydroxide ion concentration of 1.20 × 10–2 M at 25°C. Calculate the pOH of the solution.
Let's see
25°C is normal room temperature denotionpOH
[tex]\\ \rm\Rrightarrow -log[OH^-][/tex]
[tex]\\ \rm\Rrightarrow -log[1.2\times 10^{-2}][/tex]
log(ab)=loga+logb[tex]\\ \rm\Rrightarrow -log1.2-log10^{-2}[/tex]
[tex]\\ \rm\Rrightarrow -0.0791812460476+2[/tex]
[tex]\\ \rm\Rrightarrow 2.0791812460476[/tex]
Approximately 2Name the compound
i: (CH3)2CHCOOH
Answer:
methylpropanoic is your answer
Which of the molecules below is propyne? two carbons are double bonded to each other; the pair is single bonded to h above left, below left, and below right, and to c h 3 above right. two carbons are double bonded to each other; the pair is single bonded to c h 3 above left and right, and to h below left and right. an h is single bonded to c, which is triple bonded to another c, which in turn is single bonded to a c with h above and below and yet another c to the right; the final c is bonded to h above, below, and right. an h is single bonded to c, which is triple bonded to another c, which in turn is single bonded to a c which is bonded to h above, below, and right.
Propyne is is composed of only hydrogen and carbon. It is a hydrocarbon molecule.
What is propyneThe molecule propyne is hydrocarbon. This means that it is composed of only hydrogen and carbon. The molecule contains three carbon atoms and four hydrogen atoms as shown.
The structral formula that corretly reperesents the molecule called propyne is shown in the image attaced to this answer.
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Answer:
C.
Explanation:
10 grams CH10 + excess O2 → ? grams CO2 + H2O
Answer:
20 gm CO2
Explanation:
CH10 mole weight = ~ 22 gm
each 22 gm CH10 produces 44 gm CO2
44 / 22 = x / 10 = 20 gm
Which part of experimental design is most important to a scientist when replicating an experiment?.
Answer:
A split-plot design lets us replicate our treatments twice using only 24 runs in a single time period, hence it is the most efficient use of resource.
Explanation:
hope this helps
How long are peeled potatoes good for in the fridge?.
Answer:
24 hours
Explanation:
You can safely leave peeled potatoes in the refrigerator for 24 hours. It's a great way to get a head start on your holiday meal preparation. As the Idaho Potato Commission notes, you can keep both whole, peeled potatoes or cut potatoes in the refrigerator.
Order the following pH values from most acidic to least acidic (most basic).
5.7
7.0
1.2
9.1
Answer: 1.2 to 5.7 to 7.0 to 9.1
Explanation: Highest acidic begins with 1
An increase in blood carbon dioxide content causes hemoglobin to ________. release all bound carbon dioxide molecules bind more oxygen molecules bind more H release more oxygen molecules denature
An increase in blood carbon dioxide content causes hemoglobin to release more oxygen molecules. Details about hemoglobin can be found below.
What is hemoglobin?Hemoglobin is the iron-containing substance in red blood cells that transports oxygen from the lungs to the rest of the body.
Hemoglobin consists of a protein (globulin) and heme (a porphyrin ring with an atom of iron at its centre). This justifies its oxygen affinity.
However, excess carbon dioxide in the blood causes blood pH to decrease, resulting in hemoglobin proteins releasing more oxygen molecules.
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What is the most significant intermolecular force between water molecules?.
Answer:
cohesive force
Explanation:
Ba(C204) + K(IO3) = Ba(IO3)2 + K2(C2O4)
Explanation:Reaction Type
Double Displacement (Metathesis)
Net Ionic Equation
Ba(C2O4) + 2K(IO3) = Ba(IO3)2 + K2(C2O4) might be an ionic equation. Calculate the net ionic equation for Ba(C2O4)(s) + 2K(IO3)(aq) = Ba(IO3)2(aq) + K2(C2O4)(aq).
Question 3 (1 point)
Electrochemical processes involve redox reactions because electrons are transferred.
O True
O False
Question 4 (1 point)
The activity series of metals helps determine the result of chemical reactions.
O True
O False
An electrochemical process involves any process that has to do with the transfer of elecrons.
What is an elecrochemical process?An electrochemical process involves any process that has to do with the transfer of elecrons. These process include redo reactionand electron transport chains.
It is a true statement that the actiivity series helps to detect the products in a reaction because a metal that is lower in the series is always displaced by a metal that is higher in the series.
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Which animal feels no pain when they are exposed to acid?.
Researchers have found out why the African nak.ed mole-rat, one of the world's most unusual mammals, feels no pain when exposed to acid. The animals have an altered ion channel in their pain receptors that is inactivated by acid and makes the animals insensitive to this type of pain.
hope it helps...!!!
a gas has a volume of 2.00 at 323k and 3.00 ATM What would be the new volume if the temperature is changed to 273 K in the pressure is changed to 1ATM
Answer:
[tex]V_2 = 5.07L[/tex]
Explanation:
[tex]\frac{P_1 V_1}{T_1} = \frac{P_2 V_2}{T_2}\\V_2 = \frac{P_1 V_1 T_2}{T_1 P_2} = \frac{3.00atm \cdot 2.00L \cdot 273K}{323K \cdot 1.00atm} = 5.07L[/tex]
Apply combine gas law
[tex]\\ \rm\Rrightarrow \dfrac{P_1V_1}{T_1}=\dfrac{P_2V_2}{T_2}[/tex]
[tex]\\ \rm\Rrightarrow \dfrac{3(2)}{323}=\dfrav{V_2}{273}[/tex]
[tex]\\ \rm\Rrightarrow 6(273)=323V_2[/tex]
[tex]\\ \rm\Rrightarrow 1638=323V_2[/tex]
[tex]\\ \rm\Rrightarrow V_2=5.07L[/tex]
When discussing solutions, the amount of solute dissolved in the solvent is important to know
as it will affect the Colligative Properties of that solution. A solution prepared by dissolving
the maximum amount of solute in a given amount of solvent is BEST described as:
A) a supersaturated solution.
B) a saturated solution.
C) an unsaturated solution
D) a dilute solution.
Answer: B
Explanation:
Given 2.3 moles of TiO2, how many grams of Na2O can i produce