Answers
Answer:
Option D
Explanation:
Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex] represents a beta decay. Parent isotope has 83 protons, daughter isotope has only one more proton (84). Beta particle is very small, atomic mass of 212 stays the same in beta decay.
What beta decay?In nuclear physics, beta decay (β-decay) is a type of radioactive decay in which a beta particle (fast energetic electron or positron) is emitted from an atomic nucleus, transforming the original nuclide to an isobar of that nuclide.
[tex]^2^1^2_8_3Bi\;\rightarrow\;^2^1^2_8_4Po\;+\;^0_-1e[/tex]
In beta decay, one of the neutrons in the nucleus suddenly changes into a proton, causing an increase in the atomic number of an element.
Hence, option D is correct.
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Related Questions
A chlorine concentration of 0.500 ppm is desired for water purification. What
mass of chlorine must be added to 2500 L of water to achieve this level?
Answers
Answer:
1.25 grams of chlorine.
Explanation:
Hello there!
In this case, since it is possible to define the parts per million of chlorine as the milligrams of chlorine per liters of water, in order to obtain the mass of chlorine in 2500 L, we proceed as follows:
[tex]ppm=\frac{mg}{L}\\\\mg=ppm*L[/tex]
In such a way, we plug in the given 0.500 ppm and 2500 L to obtain (in grams):
[tex]mg=0.500mg/L*2500L\\\\g=1250mg*\frac{1g}{1000mg}\\\\ g=1.25g[/tex]
Best regards!
What does efficient mean in your own words
Answers
Answer:
llo
Explanation:
efficent: well orgainzed, completed with mimumin amount of effort
capable is the correct answer accept it surely
write down the used of hydrogen gas
Answers
Answer:
Nearly all of the hydrogen consumed in the United States is used by industry for refining petroleum, treating metals, producing fertilizer, and processing foods. U.S. petroleum refineries use hydrogen to lower the sulfur content of fuels.
Explanation:
Hope it helped brainlist plz:)
Which of the following solutions is acidic?
A. pH 7
B. pH 5
C. pH 14
D. pH 10
need answer quick
Answers
what effect does hybridization have on bonds
Answers
Hydrobromic acid dissolves solid iron according to the
following reaction:
Fe(s) + 2 HBr(aq) → FeBr2(aq) + H2(9)
Part A
What mass of HBr (in g) would you need to dissolve a 3.2 - g pure iron
Express your answer using two significant figures.
Part B
What mass of H, would be produced by the complete reaction of the iron
Answers
Answer:
A. 9.3 g
B. 0.11 g
Explanation:
Fe(s) + 2HBr(aq) → FeBr₂(aq) + H₂(g)PART A
First we convert 3.2 grams of pure iron into moles, using its molar mass:
3.2 g ÷ 55.85 g/mol = 0.0573 mol FeNow we convert 0.0573 moles of Fe into moles of HBr, using the stoichiometric coefficients:
0.0573 mol Fe * [tex]\frac{2molHBr}{1molFe}[/tex] = 0.115 mol HBrFinally we convert 0.115 moles of HBr into grams, using its molar mass:
0.115 mol HBr * 80.91 g/mol = 9.3 g HBrPART B
This time we convert the 0.0573 moles of Fe from last time into H₂ moles:
0.0573 mol Fe * [tex]\frac{1molH_2}{1molFe}[/tex] = 0.0573 mol H₂Finally we convert H₂ moles into grams:
0.0573 mol H₂ * 2 g/mol = 0.11 gILL GIVE BRAINLIEST!
Answers
Answer:
A since dormant volcanoes haven't erupted for a long time but are expected to erupt again in the future.
Explanation:
A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. A solution is prepared by dissolving 27.7 g of CaCl2 in 375 g of water. The density of the resulting solution is 1.05 g/mL. The concentration of CaCl2 is ________% by mass. 6.24 6.88 7.22 0.0722 0.0688
Answers
Answer:
6.88%
Explanation:
Step 1: Given data
Mass of CaCl₂ (solute): 27.7 gMass of water (solvent): 375 gStep 2: Calculate the mass of the solution
The mass of the solution is equal to the sum of the masses of the solute and the solvent.
mSolution = mSolute + mSolvent
mSolution = 27.7 g + 375 g = 402.7 g
Step 3: Calculate the percentage by mass of CaCl₂
We will use the following expression.
%m/m = mass CaCl₂/mass Solution × 100%
%m/m = 27.7 g/402.7 g × 100% = 6.88%
What do you have to do if there is an unexpected violent chemical reaction in a bottle ?
Answers
Answer:
What i would do is put it in the nearest sink or better yet a bathtub. because if it was violent, do you really want that everywhere?
Explanation:
:)
What process is represented by the letter on the diagram?
A: ____________________________________________
B: ____________________________________________
C: ____________________________________________
D: ____________________________________________
E: ____________________________________________
Answers
Explanation:
I don't really understand the question
How many K3PO4 are in the equation below after it is correctly balanced?
K3PO4 +
HCI -->
KCI +
H3PO4
Answers
Answer:
1 K3PO4 +3 HCI -->3 KCI +1 H3PO4
Explanation:
K3PO4- 1
How will an increase in the average yearly ocean temperature most
likely affect Earth's weather?
Answers
Answer:
I'd Say B
Explanation:
An experiment requires 66.6 g of ethyl alcohol (density = 0.790 g/mL). What is the volume?
Answers
Answer:
Volume = 84.30 mLExplanation:
Mass = 66.6 gram
Density = 0.790 g/mL
Volume = Mass ÷ Density
Volume = 66.6 ÷ 0.790
Volume = 84.30 mL
Calculate the molarity of each of the following
solutions.
Part A
4.35 mol of LiCl in 3.60 L solution
Part B
29.43g of C6H12O6 in 1.37 L solution
Part C
34.5mg of NaCl in 119.1 mL of solution
Answers
Answer:
a. 1.21M
b. 0.119M
c. 0.00496M
Explanation:
Molarity, M, is an unit of concentration defined as the ratio between moles of solute and liters of solution:
a. 4.35 mol LiCl / 3.60L = 1.21M
b. 29.43gC6H12O6 * (1mol / 180.16g) = 0.1634moles / 1.37L = 0.119M
Molar mass C6H12O6: 180.16g/mol
c. 34.5mg NaCl = 0.0345g * (1mol / 58.44g) = 5.9x10⁻⁴moles / 0.1191L = 0.00496M
The lithosphere ______ part of the earth’s crust.
A. Gaseous
B. Solid
C. Water
D. Liquid
Answers
Answer:
The lithosphere solid part of the earth's crust
Write a skeleton equation for the reaction in which aqueous sodium chloride
reacts with aqueous silver nitrate to produce aqueous sodium nitrate and solid
silver chloride.
Answers
Answer:
Explanation:according to question:
. Nacl (aq) + AgNO3 (aq) --> AgCl
(s) + NaNO3 (aq).balanced.
How many moles of Cu are in 1.48 × 1025 Cu atoms?
Answers
24.6 mol Cu
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
MolesAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Stoichiometry
Using Dimensional AnalysisExplanation:Step 1: Define
[Given] 1.48 × 10²⁵ atoms Cu
[Solve] moles Cu
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
[DA] Set up: [tex]\displaystyle 1.48 \cdot 10^{25} \ atoms \ Cu(\frac{1 \ mol \ Cu}{6.022 \cdot 10^{23} \ atoms \ Cu})[/tex][DA] Divide [Cancel out units]: [tex]\displaystyle 24.5766 \ mol \ Cu[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
24.5766 mol Cu ≈ 24.6 mol Cu
Zinc + Hydrochloric Acid - Zinc Chloride and Hydrogen Gas
Zn + 2HCI
ZnCl2 + Hz
I know there are 2 molecules of hydrochloric acid because there is....
O a 2 in front of HCI
O a 2 behind the CI
O a 2 behind the H
Answers
Answer:
The first choice: a 2 in front of HCl
Explanation:
Fill in the blanks.
The regioselectivity of a reaction is often based on the energetics of the reaction. The kinetic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ________.
The thermodynamic product of a reaction is the product with the ____________.
The kinetic product is favored when the temperature is ___________.
Answers
Answer:
vcfg
Explanation:
The kinetic product of a reaction is the product with the high energy and favored when the temperature is low. The thermodynamic product of a reaction is the product with the low energy and favored when the temperature is high.
What is regioselectivity?Regioselectivity is that part of any chemical reaction where if product is formed by more than one ways than only one way will be prefererd in this condition.
In any system if chemical reaction is occur at low temperature then the fast formed product is the stable product which is kinetically favored, and have the high energy.In any system if chemical reaction is occur at high temperature then the slow formed product is the stable product which is thermodynamically favored, and have the low energy.Hence correct options are high energy, low, low energy and high.
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A 1.00 L sample of gas at 760 torr is compressed to 0.800 L at constant
temperature. Calculate the final pressure of the gas.
Answers
Answer:
950 torr
Explanation:
Step 1: Given data
Initial volume of the gas (V₁): 1.00 LInitial pressure of the gas (P₁): 760 torrFinal volume of the gas (V₂): 0.800 LFinal pressure of the gas (P₂): ?Step 2: Calculate the final pressure of the gas
If we assume ideal behavior and constant temperature, we can calculate the final pressure of the gas using Boyle's law.
P₁ × V₁ = P₂ × V₂
P₂ = P₁ × V₁/V₂
P₂ = 760 torr × 1.00 L/0.800 L = 950 torr
Molecules in a substance change into a new kind of molecule during a phase change.
Answers
Answer:
A phase change is occurring; the liquid water is changing to gaseous water, or steam. On a molecular level, the intermolecular forces between the water molecules are decreasing. The heat is providing enough energy for the water molecules to overcome these attractive forces.
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The phase transition takes place at the molecular level by changing the strength of intermolecular forces between the molecules.
What is phase change?Phase changes can be defined as the physical processes of transition between a state of a medium, identified by some parameters. These changes in states of matter that can be written as liquid, gas, solid, and plasma.
A particular phase in a thermodynamic system exhibits uniform physical properties. During a phase transition, some properties of the medium change, because of the change in external conditions, such as temperature, and pressure.
In a solid state, the molecules are compactly bound by a strong force of attraction. In the liquid state, the molecules have lesser attraction forces. The phase changes depend upon the temperature and pressure.
Therefore, phase transitions occur on a molecular level as the alteration in the strength of intermolecular forces.
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2. What process of chemical weathering can create rust?
Answers
Answer:
Oxidation
Explanation:
How many grams of CoCl2 in 1/2 liter would be used to make a 1.0 molar solution? (can you show steps please?)
Answers
Answer:
The answer I think that is correct is 65g
There are 49.5g of CoCl2 in 1/2 liter used to make a 1.0 molar solution. Details about how to calculate molar concentration can be found below.
How to calculate mass?The mass of a substance can be calculated by multiplying the number of moles of the substance by its molar mass.
However, the number of moles of CoCl2 must be calculated using the following formula:
no of moles = 0.5L × 1M
no of moles = 0.5moles
Molar mass of CoCl2 = 99g/mol
mass of CoCl2 = 0.5 × 99
mass of CoCl2 = 49.5g
Therefore, there are 49.5g of CoCl2 in 1/2 liter used to make a 1.0 molar solution.
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Why do women have more reactions to vaccines?
Answers
Experts say this isn’t unusual with vaccinations because the estrogen in women’s bodies is designed to elicit a stronger immune response.
Hope it helps you ☺
Happy Learning ⭐
The dosage for an antibiotic is prescribed at 8.0 mg per kilogram of body weight taken it twice daily for 2 weeks what total mass of antibiotic will be taken by a 180 lb person for the two week period?
Answers
Answer:
18.2784 g
Explanation:
First we convert 180 lb to kg:
1 lb = 0.453 kg180 lb * 0.453 kg / lb = 81.6 kgNow we calculate the mass of antibiotic taken in one day:
8.0 mg/kg * 81.6 kg = 652.8 mgGiven that it is taken twice daily, in one day the person would take (652.8 * 2) 1305.6 mg. In grams that mass would be:
1305.6 mg / 1000 = 1.3056 gFinally we multiply those 1.3056 daily grams by the 14 days in two weeks:
(1.3056 g) * 14 = 18.2784 gThe total mass of the antibiotic taken by a 180 lb person for the two-week period would be 18,252.8 mg.
An antibiotic is a type of antimicrobial substance used to treat bacterial infections. It is a medication that either inhibits the growth of bacteria or kills them outright.
Antibiotics work by targeting specific structures or functions in bacterial cells, disrupting their ability to replicate or causing them to die. They are an essential tool in modern medicine for treating various bacterial illnesses and have significantly contributed to improving human health by reducing the impact of infectious diseases.
To calculate the total mass of the antibiotic taken by a 180 lb person for a two-week period,
Convert the person's weight from pounds to kilograms:
Weight in kilograms = 180 lb × 0.453592 kg/lb
= 81.65 kg
Daily dosage = 8.0 mg/kg × 81.65 kg
= 653.2 mg
Total dosage for two weeks = Daily dosage × 2 (twice daily) × 14 (days)
= 18,252.8 mg
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7. Which substance produces sulfur dioxide when roasted in air?
A bauxite
B cryolite
C hematite
D zinc blende
Answers
B. cryolite substance produces sulfur dioxide when roasted in air.
Cryolite (Na3AlF6, sodium hexafluoroaluminate) is an uncommon mineral identified with the once-large deposit at Ivittuut on the west coast of Greenland, mined commercially until 1987.
Sulfur dioxide (SO2) is a gaseous air pollutant composed of sulfur and oxygen. SO2 forms when sulfur-containing fuel such as coal, oil, or diesel is burned. Sulfur dioxide also converts in the atmosphere to sulfates, a major part of fine particle pollution in the eastern U.S.
What is sulfur dioxide and why is it bad?Sulfur dioxide (SO2), a colorless, bad-smelling, toxic gas, is part of a larger group of chemicals referred to as sulfur oxides (SOx). These gases, especially SO2, are emitted by the burning of fossil fuels — coal, oil, and diesel — or other materials that contain sulfur.
What is sulfur dioxide used for?Although its chief uses are in the preparation of sulfuric acid, sulfur trioxide, and sulfites, sulfur dioxide also is used as a disinfectant, a refrigerant, a reducing agent, a bleach, and a food preservative, especially in dried fruits.
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How many atoms is 3.2 mol phosphorus?
Answers
Answer:
I think 4 I'm not completely sure
Explanation:
I hope it's right
what happens to some of the electrons in an atom when the atom is heated
Answers
Answer:
When the electrons in the atom are excited, for example by being heated, the additional energy pushes the electrons to higher energy orbitals. When the electrons fall back down and leave the excited state, energy is re-emitted in the form of a photon
Explanation:
STEP 5: LEAD
Tare the balance. Put calorimeter (no lid) on the balance.
Measure the mass to the nearest 0.01 g.
12.34 g
Use a graduated cylinder to add approximately 40 mL of
water to the calorimeter. Measure the mass of the
calorimeter (no lid) and water to the nearest 0.01 g.
51.99 g
Subtract to find the mass of the water. 39.65 g
Answers
Answer:
the answers are in the pic
Explanation:
Answer:
12.36, 52.49, 40.13
Explanation:
Step 5 for the copper one
Linnaeus created seven levels of classification.
What are the names of the seven levels?
Select all correct answers.
Animalia
Protista
Kingdom
Order
Phylum
Organism
Fungi
Family
Class
Species
Line
Genus
Answers
Phylum
Class
Order
Family
Genus
Species