Answers
B = 146
C = 56
Further explanationThere are two types of nuclear reactions
Fission reaction is the splitting of an atomic nucleus by firing a particle
Fusion reaction is a combination of two atomic nuclei
There are several particles involved in atomic nuclei reactions:
alpha α particles ₂He⁴ beta β ₋₁e⁰ particles gamma particles γ positron particles ₁e⁰ neutron particles ₀n¹In a nuclear reaction, it is always found that the atomic number (Z) and mass number (A) are the same either before or after the reaction
Reaction(Fission reaction ) :
[tex]\tt ^{239}_{94}Pu+^1_0n\rightarrow ^B_CBa+^{91}_{38}Sr+3^1_0n[/tex]
mass number :
[tex]\tt 239+1=B+91+3.1\\\\240=B+94\\\\B=146[/tex]
atomic number :
[tex]\tt 94+0=C+38+3.0\\\\94=C+38\\\\C=56[/tex]
Related Questions
Which of the following is true for a cell that has DNA present inside a nucleus? (5 points)
It must be a part of the oldest known fossils.
It must be a part of a eukaryote.
It must be a part of a bacterium.
It has a nucleoid.
I REALLY NEED THIS RIGHT NOW IF YOU SEE THIS AND NOW THIS PLEAASE HELPPP
Answers
Answer:
It must be a part of a eukaryote
Explanation:
Eukaryotic cells are larger than prokaryotic cells and have a “true” nucleus, membrane-bound organelles, and rod-shaped chromosomes. The nucleus houses the cell's DNA and directs the synthesis of proteins and ribosomes.
What is formed when atoms of elements combine?
O Compounds
O Electrons
O Protons
O Neutrons
Answers
Answer:
compounds , because they're combined
Answer:
The answer is A.) Compounds
Explanation:
Compounds are when the atoms of elements combine. When combined it creates a compound.
2 Aluminum oxidizes according to the following equation: 4A1 + 302 → 2Al2O,
[a] Powdered Al (0.048 myl) is placed into a container containing 0.030 mol O.. What is the limiting reactant?
[b] How many moles of the excess reoctant remaine?
Answers
Answer:
Identify the limiting reactant (limiting reagent) in a given chemical reaction.
Calculate how much product will be produced from the limiting reactant.
Calculate how much reactant(s) remains when the reaction is complete.
How many molecules are in 252.3 g H2S?
Answers
Answer:
4.457 × 10²⁴ molecules H₂S
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:
Step 1: Define
252.3 g H₂S
Step 2: Identify Conversions
Avogadro's Number
Molar Mass of H - 1.01 g/mol
Molar Mass of S - 32.07 g/mol
Molar Mass of H₂S - 2(1.01) + 32.07 = 34.09 g/mol
Step 3: Convert
[tex]252.3 \ g \ H_2S(\frac{1 \ mol \ H_2S}{34.09 \ g \ H_2S} )(\frac{6.022 \cdot 10^{23} \ molecules \ H_2S}{1 \ mol \ H_2S} )[/tex] = 4.45688 × 10²⁴ molecules H₂S
Step 4: Check
We are given 4 sig figs. Follow sig fig rules and round.
4.45688 × 10²⁴ molecules H₂S ≈ 4.457 × 10²⁴ molecules H₂S
Answer:
[tex]\boxed {\boxed {\sf 4.457*10^{24} \ molecules \ H_2S}}[/tex]
Explanation:
First, find the molar mass of H₂S
Use the Periodic Table to find the mass of hydrogen and sulfur.
Hydrogen (H): 1.008 g/mol Sulfur (S): 32.07 g/molTo find the molar mass of H₂S, multiply the molar mass of the elements by the number of atoms of the element.
Hydrogen (2): (2)(1.008 g/mol) =2.016 g/molSulfur (1 atom): (1)(32.07 g/mol)= 32.07 g/molAdd.
2.016 g/mol + 32.07 g/mol =34.086 g/molNext, find the number of moles in the sample (252.3 g) Use the ratio of grams to moles.
[tex]252.3 / g * \frac{1 \ mol \ H_2S}{34.086 \ g }[/tex]
Multiply. The grams will cancel each other out.
[tex]\frac{252.3 / mol }{34.086 \ }=7.40186587 \ mol[/tex]
Finally, found the number of molecules using Avogadro's number (There are 6.022*10²³ molecules in 1 mole).
[tex]7.40186587 \ mol \ H_2S*\frac{6.022*10^{23} molecules \ H_2S}{1 \ mol \ H_2S}[/tex]
Multiply. The mole (mol) will cancel each other out.
[tex]7.40186587*{6.022*10^{23}\ molecules \ H_2S} = 4.45740363 *10^{24} \ molecules \ H_2S[/tex]
Round to the correct number of significant figures. The sample had 4 sig figs (2, 5, 2, 3), so round to 4 sig figs.
[tex]4.457*10^{24} \ molecules \ H_2S[/tex]
There are about 4.457 * 10²⁴ molecules of H₂S
science lab questions:
When the enzyme lactase breaks down lactose, the sugar ______________ is produced.
The _______________________ of an enzyme has a big impact on how fast or slow the enzyme reaction occurs.
Two environmental conditions that affect enzyme reaction rates are ____________________ and ____________.
The faster lactase works, the more ____________________ will be produced as lactose is broken down.
Answers
Answer:
glucose and galactose
concentration of the enzyme
temperature and pH
glucose and galactose
Explanation:
Enzymes are biological catalysts. They catalyze various biochemical reactions in the body. Enzymes are proteins.
The enzyme responsible for the breakdown of lactose is lactase. This enzyme catalyzes the breakdown of lactose to glucose and galactose. Galactose is about 65% as sweet as sucrose.
The rate of enzyme reaction is influenced by the concentration of the enzyme. As the concentration of the enzyme is increased, the velocity of the reaction proportionately increases.
Temperature and pH are important environmental factors that affect the rate of enzyme catalyzed reaction because they influence the activity of the enzyme and may even denature the enzyme.
Ethanol undergoes combustion in oxygen to produce carbon dioxide gas and liquid water. The standard heat of combustion of ethanol, c2h5oh(l), is -1366.8 JK/mol. Given that [co2(g)] = -393.5kg/mol and [h20(l) = -285.8 KJ/ mol, what is the standard enthalpy of formation of ethanol?
Answers
Answer:
[tex]-277.6\ \text{kJ/mol}[/tex]
Explanation:
Heat of combustion of [tex]C_2H_5OH(l)[/tex] = -1366.8 kJ/mol
Heat of formation of [tex]CO_2(g)[/tex] = -393.5 kJ/mol
Heat of formation of [tex]H_2O(l)[/tex] = -285.8 kJ/mol
The reaction is
[tex]C_2H_5OH(l)\rightarrow 2CO_2(g)+3H_2O(l)[/tex]
Assuming [tex]x[/tex] is the standard enthalpy of formation of ethanol
[tex]-1366.8=2\times (-393.5)+3\times (-285.8)-x\\\Rightarrow x=2\times (-393.5)+3\times (-285.8)+1366.8\\\Rightarrow x=-277.6\ \text{kJ/mol}[/tex]
The standard enthalpy of formation of ethanol is [tex]-277.6\ \text{kJ/mol}[/tex].
The standard enthalpy of formation of ethanol is -277.6 kJ/mol.
The equation of the reaction is;
C2H5OH(l) + 3O2(g)⟶ 2CO2(g) + 3H2O(l)
The heat of combustion of each specie is listed below;
C2H5OH(l) = -1366.8 JK/mol
CO2(g) = -393.5 kJ/mol
H2O(l) = -285.8 KJ/ mol
Standard heat of formation of ethanol;
-1366.8 = 2( -393.5) + 3( -285.8 ) - x
where x = heat of formation
x = 2( -393.5) + 3( -285.8 ) + 1366.8
x = -277.6 kJ/mol
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help help help pls pls pls
Answers
Explanation:
Aluminium and Chlorine.
Al and Cl2.
After 1 kg of U-235 undergoes fission, the mass of the products is 8.4 x 10^-4 kg less than the initial 1 kg. How much energy was produced by the fission of 1 kg of U-235?
Use Einstein's equation, E = mc2, where E is energy in Joules, m is mass in kilograms, and c is the speed of light, 3 x 108 m/s.)
Answers
Answer:
Uranium-235 is a popular choice of fuel for nuclear reactors. Instead of allowing 1 kg of U-235 to decay naturally, imagine it is used as fuel in a nuclear > reactor. It is bombarded with neutrons, causing it all to fission in a matter of days. U-235 undergoes fission, the mass of the products is 8.4 x 10-4 kg
Explanation:
The first nuclear reactor to achieve controlled nuclear disintegration was built in the nuclear reactions presently used or studied by the nuclear power industry in nuclear fission a large nucleus is split into two medium-sized nuclei. About 5600 tons (5.1 X 106 kg) of coal are required to produce the same amount of.
What are gases that are molecules
Answers
Answer:
there are elemental molecules, made from one type of atom (pure), example: oxygen and there are compound molecules, made from more then one type of atom, for example carbon dioxide
what is the meaning of seasons ?
Answers
add salt, herbs, pepper, or other spices to (food). 3. make (wood) suitable for use as timber by adjusting its moisture content to that of the environment in which it will be used.
13. Given the table representing the subatomic particles
in four different atoms:
Atom
Number of Number of Number of
Protons Neutrons Electrons
A
4
4
4
E
5
7
5
G
6
7
6
J
12
12
12
Which atom has a mass of 12 u?
A) A
B) E
C) G
D) J
Answers
Answer: E
Explanation:
if 28.5 g of calcium hydroxide is dissolved in enough water to make 185g of solution what is the percent by mass of calcium hydroxide in the solution
Answers
The percent by mass of calcium hydroxide in the solution : 15.41%
Further explanationThe concentration of a substance can be expressed in several quantities such as moles, percent (%) weight/volume,), molarity, molality, parts per million (ppm) or mole fraction. The concentration shows the amount of solute in a unit of the amount of solvent.
Mass of solute (Ca(OH₂-Calcium hydroxide) : 28.5
Mass of solution = 185 g
[tex]\tt \%mass=\dfrac{mass~solute}{mass~solution}\times 100\%\\\\\%mass=\dfrac{28.5~g}{185~g}\times 100\%\\\\\%mass=15.41\%[/tex]
15.41% is the percent by mass of calcium hydroxide (CaOH) in the solution.
How we calculate percent mass of any solute?Percent mass of any solute in the solution will be define as:
% mass = (mass of solute / mass of solution) × 100%
In the question given that,
Mass of solute calcium hydroxide (CaOH) = 28.5 g
Mass of solution i.e. water = 185 g
Noe we put these values on the above equation to calculate the % mass of CaOH in the solution as:
% mass = (28.5/185) × 100% = 15.41%
Hence, the percent mass of CaOH is 15.41%.
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What is the wavelength of a wave having a frequency of 3.23 x 1014 sl?
Answers
The wavelength=9.29 x 10⁵ m
Further explanationRadiation energy is absorbed by photons
The energy in one photon can be formulated as
[tex]\large{\boxed{\bold{E\:=\:h\:.\:f}}}[/tex]
Where
h = Planck's constant (6,626.10⁻³⁴ Js)
f = Frequency of electromagnetic waves
f = c / λ
c = speed of light
= 3.10⁸
λ = wavelength
a frequency of 3.23 x 10¹⁴/s
the wavelength :
[tex]\tt \lambda=\dfrac{c}{f}=\dfrac{3\times 10^8}{3.23\times 10^{14}}=9.29\times 10^5~m[/tex]
how many moles are in 83.1g of CaBr2
Answers
Answer:
0.416 mol CaBr₂
General Formulas and Concepts:
Chemistry - Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisExplanation:
Step 1: Define
83.1 g CaBr₂
Step 2: Identify Conversions
Molar Mass of Ca - 40.08 g/mol
Molar mass of Br - 79.90 g/mol
Molar Mass of CaBr₂ - 40.08 + 2(79.90) = 199.88 g/mol
Step 3: Convert
[tex]83.1 \ g \ CaBr_2(\frac{1 \ mol \ CaBr_2}{199.88 \ g \ CaBr_2} )[/tex] = 0.415749 mol CaBr₂
Step 4: Check
We are given 3 sig figs. Follow sig fig rules and round.
0.415749 mol CaBr₂ ≈ 0.416 mol CaBr₂
Which type of reaction is NaCl + AgNO3 → NaNO3 + AgCl? synthesis decomposition oxidation replacement
Answers
Hope this helps! :)
The type of reaction represented by the equation is replacement reaction.
Definition of replacement reactionA replacement reaction also known as displacement reaction is a reaction in which the ions of the reactant exchange to produce a new product. For example
AB + CD —> AD + CB
In the above reaction, we can see that D replaces B in the product which shows that the reaction is a replacement reaction.
How to determine the type of reactionNaCl + AgNO₃ → NaNO₃ + AgCl
In the above reaction, we can see that Cl replaces NO₃ in the product. This simply indicates that the reaction is a replacement reaction.
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5. Which elements are examples of nonmetals?
a) Sodium, potassium, and calcium
b) Silicon, germanium, and astatine
c) Barium, iron, cobalt
d) Argon, sulfur, oxygen
Answers
Answer:
B
Explanation:
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How are crystals made?
Answers
Explanation:
Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Answer: Crystals often form in nature when liquids cool and start to harden. Certain molecules in the liquid gather together as they attempt to become stable. They do this in a uniform and repeating pattern that forms the crystal. In nature, crystals can form when liquid rock, called magma, cools.
Explanation: Can i have BrainLiest
If 1 kg of fuel is used in the above fusion reaction (2 1H + 3 1H--> 4 2He+1 0N) , the resulting helium has a mass of 0.993 kg. In other words, 0.007 kg of mass is converted to energy. How much energy is produced by the fusion of 1 kg of hydrogen? (Hint: Use Einstein's equation, E = mc2, where E is energy in Joules, m is mass in kilograms, and c is the speed of light, 3 x 108 m/s.)
Answers
Answer:
E--> mc2
E--> 0.007 x (3x108)2
E--> 6.3 x 1014J
Explanation:
(a) A mixture of milk and water can be separated by filtration.
and by which method
Answers
Answer:
Distillation
Explanation:
Distillation is the process of separating the components of a liquid by using the method of selective boiling and condensation.
Since the components of the liquid have different boiling points, they would evaporate at different temperatures, thus causing the separation to occur.
So, distillation can be used to separate a mixture of milk and water.
After James Chadwick discovered the neutron, atomic theory expanded to include isotopes. Isotopes have many practical uses. For example,
scientists use the relative amount of carbon-12 to carbon-14 in ancient bones to determine how old they are.
How many neutrons are in an atom of Carbon-147
A 2
B 6
C 8
D 14
Answers
Answer:
The answer is C which is 8 neutrons
Explanation:
This is because all carbon isotopes have 6 protons in their nucleus. Carbon 14 have 2 extra neutron aside from only having 6. So 6 protons + 6 neutrons + 2 more extra makes 14 which makes it Carbon - 14. I hope this makes sense.
What is not found on the inside of the eye? optic nerve, cornea, tear ducts, or iris?
Answers
Tears drain into the puncta, located in the inside corners of your upper and lower eyelids. Your eyelids have small canals (canaliculi) that move tears to a sac where the lids are attached to the side of the nose (lacrimal sac). From there tears travel down a duct (the nasolacrimal duct) draining into your nose.
Attempig to pull an all-nighter and get all my work done. Please help. I'll give brainliest.
What kind of data do seismometers provide for seismologists?
track movements of magma in the Earth's mantle
time of earthquake, magnitude and velocity, and type of seismic waves
location, quantity and time of damage created by earthquake
when tsunamis caused by quakes will strike coastal areas
Answers
Answer:
Below
Explanation:
time of earthquake, magnitude and velocity, and type of seismic waves
location, quantity and time of damage created by earthquake
An inherited characteristic of an organism is called a ___________________.
Answers
Answer:
fitness. the ability of an organism to survive and reproduce in its environment. adaptation. the inherited characteristic that increases an organism's chance of survival.
An inherited characteristic of an organism is called a heredity.
What do you mean by heredity ?The term heredity refers to the genetic heritage passed down by our biological parents. It is the transmission of traits from one generation to another generation. These traits can be physical, such as eye colour, blood type or a disease, or behavioral.
Heredity is also called biological inheritance, is the exiting of of traits from parents to their offspring either through asexual reproduction or sexual reproduction.
Heredity is a process in which organisms develop characteristics from their parents. These characteristics are called traits. Inheritance is the transmission of information from one generation of individuals to the next.
Thus, An inherited characteristic of an organism is called a heredity.
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What are some activities that all living things must do?
Answers
Answer:
Drink Water, Eat food, Reproduce
Evolve etc.
Explanation:
When an oxygen-19 nucleus undergoes beta decay, the nucleus formed is
that of
oxygen-18.
O nitrogen-18.
fluorine-19.
O carbon-14.
Answers
What is produced during the replacement reaction of Cu(NO3)2 and Zn?
ZnNO3 + Cu
Zn + Cu(NO3)2
ZnCu + 2NO3
Zn(NO3)2 + Cu
Answers
Hello!
Cu(NO₃)₂+Zn→Zn(NO₃)₂+Cu
Answer: The answer is D, although I figure you're done with the test now
Explanation:
I was taking the unit test and happened to get the question right. And it's easier to type the letter choice than the whole answer out :)
What is a nonpolar covalent bond?
Answers
Answer: A covalent bond that has an equal sharing of electrons (part (a) of Figure 4.4. 1) is called a nonpolar covalent bond. Figure 4.4. 1 Polar versus Nonpolar Covalent Bonds. (a) The electrons in the covalent bond are equally shared by both hydrogen atoms.
Explanation:
Put the following elements in order from largest to smallest atomic radius
Br, Fe, Ga, Ca, Cu
Answers
Answer:
Ca-197
Ga-135
Cu-128
Fe-126
Br-114
Identify three reasons why
plate tectonics can be described as the surface expression of the
cycling of matter due to the flow of energy via mantle convection.
Answers
The three reasons why plate tectonics can be described as the surface expression of mantle convection are;
1) It involves the outer shell which is the surface of the earth.
2) It involves movement of of rocks at the the surface which can be likened to mantle convection.
3) It involves transfer of heat as in mantle convection but at the surface.
Mantle convection is simply defined as transport of the solid bulk of the earths' interior known as mantle by the transfer of heat from the earth's white hot core which is its' deep interior to the surface known as lithosphere which causes the motion of Earth's mantle to solidly creep.Now, plate tectonics are defined as the theory that explains the past and present movements of the rocks situated at the surface of the earth which aids in understanding the geological history of the rocks. This means it is basically the outer shell of the earth that is being divided into large plates that move smoothly over the earths' mantle but above the earths' core.Read more at; https://brainly.com/question/19990159
Which is demonstrated by the steps shown in the flow chart?