When a radioactive decay occurs, protons/neutrons, alpha/beta particles and gamma rays are all released depending on the type of decay.
Determine the size of the heavy particle using the simulation tools and then relate molecule size to something you are familiar with. A common way to relate two things is to say something like: 1000 particles of sand fit in the palm of your hand. Show your calculations with the units clearly labeled.
Answer:
Explanation:
This can be determined in as represented in the three (3) steps below.
1. Movement of heavy and light particles
Note that both the particles are trying to occupy the maximum room, by having constant elastic collision with the boundary and each other, thereby following brownian motion
Also note that heavy particles travel slowly and lighter ones travel faster
Increasing temperature will increase the speed of the particles in the chamber and will also increase the pressure inside the chamber
Hence, ideal gas mixtures occur following ideal gas laws, like a mixture of CO₂ ( heavy gas) with H₂ ( lighter gas)
2. Measuring the length of the chamber by ruler, we have l = 6.6 mm
time taken by heavy molecule at 570 k, t = 11.63×10⁻¹² s [ using stop watch]
so, speed of molecule = 567.49 m/s
3. Therefore, at 2.8 atm pressure, 277 K temperature, 989 heavy particles of gas are there
This is gotten as the relative size of the molecules
Which has most likely been peer reviewed?
O an article on the benefits of eating cheese, featured in Crosscreek Dairy Monthly magazine
O an article on the benefits of wearing shoe inserts, featured in Bob's Footwear circular
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
O an article on beneficial face creams, featured in Beauty and You magazine
Answer:
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
Explanation:
This article is published in a Medical Journal, which means the contents must be credible, informative, and accurate. In order to be these things, the author most likely had others review their writing to remain objective and ensure quality work. The other articles are not meant to solely inform and are featured in less credible magazines. Therefore, the third option is correct.
Answer:
an article on the beneficial bacteria in yogurt, featured in Medical Journal of Gastroenterology
Explanation:
Which is a physical change?
strawberries liquefied in a blender
strawberries cooked into jelly
strawberries left out to mold
Answer: Strawberries liquefied in a blender
Explanation:
Which represents the balanced nuclear equation for the beta minus decay of Co-60?
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 26 upper F e plus superscript 0 subscript plus 1 e.
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 28 upper N i plus superscript 0 subscript negative 1 e.
Superscript 60 subscript 27 upper C o plus superscript 0 subscript plus 1 e right arrow superscript 60 subscript 28 upper N i.
Superscript 60 subscript 27 upper C o plus superscript 0 subscript negative 1 e right arrow superscript 60 subscript 26 upper Fe.
Explanation:
Superscript 60 subscript 27 upper C o right arrow superscript 60 subscript 28 upper N i plus superscript 0 subscript negative 1 e.
Answer:
Its B
Explanation:
Did the test and got 100%
Natural disaster that happened in San Angelo ?
Answer:
The National Weather Service
Tornadoes
Explanation:
The National Weather Service
Tornadoes
happen in San Angelo.
Hope this helps
When volcanoes errupt, they can release oxides of sulphur that react with tiny droplets of water in the air to form sulphuric acid. Sulphuric acid can be considered a(n) __________.
A)
greenhouse gas
B)
primary pollutant
C)
biofuel
D)
secondary pollutant
E)
ecotone
wht kind of particles contribute to an overall heating effect on climate?
Answer: Aerosols like sulfur, nitrate, and organic carbon are formed in the atmosphere and cause global cooling. Thereby they contribute to mask parts of the human induced global warming. On the other hand, black carbon absorbs radiation and thereby has a warming effect on the earth's climate. -science daily
Explanation: please mark me brainiest. i need one to get a higher rank :/
Answer:
Aerosols like sulfur, nitrate, and organic carbon are formed in the atmosphere and cause global cooling. Thereby they contribute to mask parts of the human induced global warming. On the other hand, black carbon absorbs radiation and thereby has a warming effect on the earth's climate
Explanation:
google hope this helps you
How do you know when a phase change happens?
Answer:
phase for what?
Explanation:
8 points
11. Humans have negatively impacted the environment for years. Which
events represent ways humans have harmed the environment. (Choose all
that apply.)
burning fossil fuels
minning
planting trees
using solar power
using fertilizers
recycling
Answer:
Burning fossil fuels
Mining
Using fertilizers
According to the unbalanced equation: KCIO3 → KCI + O2 how many
moles of potassium chlorate are needed to produce 6.51 moles of oxygen?
Answer:
06
Explanation:
11. What is the maximum number of electrons that an atomic orbital can contain?
2
32
8
1
Answer:
2
Explanation:
Each orbital can hold two electrons. One spin-up and one spin-down.
What is the difference between endothermic reactions and exothermic reactions? (Please describe both types of chemical reactions.)
Answer:
Explanation:
Endothermic reactions absorb energy from the surrounding, but exothermic reactions release energy to the surrounding.
Elements found in the same period on the periodic table have the same...
Group of answer choices
Number of neutrons
Number of Valence Electrons
Number of Energy Levels
Properties
Answer:
valence electrons
Explanation:
what tool do you have to use to find the mass of a small pumpkin? A beaker B balance C stopwatch D meter stick E thermometer F graduated cylinder
Answer: Balance (B.)
Explanation:
Balances are used to measure mass.
Beakers and graduated cylinders measure volume. Stopwatches measure time. Meter sticks measure length. Thermometers measure temperature.
calculate the percent solute of 1.4g of NaCl in 46.6g of saline solution
Answer:
3.0%
Explanation:
A solution's mass percent concentration, (% m/m), is calculated by observing the mass of solute in grams of obtained in each 100 g of solution. In simple terms, the solution's mass percent concentration is given by the number of parts of solute obtained in every 100 parts of solution, made up of solute and solvent.
Hence the percent m/m concentration of a solution is obtained as;
Mass of solute/ mass of solution × 100/1
From the question, we have,
Mass of solute= 1.4g
Mass of solution= 46.6 g
Therefore, percent m/m concentration of the saline solution=
1.4/46.6 ×100/1 = 3.0%
The percent solute concentration of the solution is 3.0%
The dotted line between 0- and H+ represents a
-0)
A)
covalent bond between the two oppositely charged ions.
B)
o
hydrogen bond, a weak bond between a hydrogen and an electronegative
atom.
strong, short-distance bond that is responsible for the unique properties of
water.
polar covalent bond that results from the unequal and opposite charges of
the ions.
D)
Answer:
hydrogen bond, a weak bond between a hydrogen and an electronegative
atom.
Explanation:
Hydrogen bonding, is an intermolecular or intramolecular interaction involving a hydrogen atom located between a pair of other atoms having a high affinity for electrons; such a bond is weaker than an ionic bond or covalent bond but stronger than van der Waals forces. Hydrogen bonds can exist between atoms in different molecules or in parts of the same molecule.
A hydrogen bond is a type of dipole-dipole interaction; it is not a true chemical bond. These attractions can occur between molecules (intermolecularly) or within different parts of a single molecule (intramolecularly) as explained above.
Oxygen is strongly electronegative. Hydrogen bonds are observed when hydrogen is bonded to strongly electronegative species such as oxygen. Hydrogen bonds account for the high boiling point of water.
HELP. what are van der waals forces?
Answer: Examples of van der Waals forces include hydrogen bonding, dispersion forces, and dipole-dipole interactions.
Explanation:
What amount of moles does 60.5 L of carbon dioxide occupy at 2.15 atm and 25 degrees C?
4.3 moles
5.3 moles
9.3 moles
2.5 moles
Answer: 5.3 moles
Explanation:
Hi, to answer this question we have to apply the next formula:
n = PV/RT
Where:
n = number of moles
P= Pressure = 2.15 atm
V= volume = 60.5 L
R = 0.0821 atm(L)/mol(K)
T = temperature = 25 °+ 273.15 = 298.15 Kelvin
Replacing with the values given:
n = 2.15 (60.5) / 0.0821 (298.15) = 5.3 moles.
Feel free to ask for more if needed or if you did not understand something.
In which diagram would the block of wood have the greatest acceleration?
Answer:
The answer is B.
Explanation:
There is more Newton force pushing it and since it's on a flat surface it moves more than a higher kg weight block.
Which of the following happens to a molecule of an object when the object is cooled?
O its temperature increases.
It loses kinetic energy.
O its size increases.
It moves faster
Question 16 Multiple Choice Worth 1 points)
(01.02 MC)
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The molecular theory states the movement and collision of the molecules in a matter. When an object is cooled, then the molecule loses its kinetic energy. Thus, option B is correct.
What is the kinetic molecular theory?The kinetic molecular theory explains the composition and the motion of the particles in matter. It assumes that the particles move constantly in the matter and have insignificant volume and intermolecular forces.
The particles show elastic collisions that use the ideal gas equation to show the effect of the temperature on the kinetic energy. The kinetic energy has a direct relationship with the temperature.
A decrease in temperature(cooling) of matter causes the particles to slow down their speed of collision which results in a loss in kinetic energy and is used as the principle to change liquid into solids.
Therefore, option B. the decrease in temperature reduces the kinetic energy.
Learn more about kinetic molecular theory here:
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please answer ASAP which of the following represents gamma emission? picture attached
Answer:
The answer is A.
Explanation:
A P E X
Gamma radiation arises from the radioactive decay of the nuclei along with the release of γ. The reaction of the Technetium (Tc) element represents the gamma decay. Thus, option A is correct.
What is gamma decay?Gamma packets are the energy packets released in the radioactive decay reaction where the particle undergoing decay does not have a change in the number of protons or neutrons but instead moves the nucleus from higher to lower energy levels. The gamma emission is depicted by,
⁹⁰Tc₄₃ → ⁹⁰Tc₄₃ + γ
In the gamma decay of the Technetium element, the nucleus from the higher energy lowers and produces the same elements along with a gamma photon.
In gamma decay, the unstable nuclei dissipate energy in the form of gamma rays or photons. In this type of radioactive decay, the element in the reactant and the product are the same.
Therefore, a reaction involving Tc is an example of gamma emission.
Learn more about gamma decay here:
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How can a scientist ensure that his or her data are reliable? by making a single observation by repeating trials during an experiment by recording values without units by keeping the results private
Answer:by repeating trials during an experiment.
Explanation:
.
Answer:
its b
Explanation:
You are shown a liquid that looks the same throughout. You are told it contains more then one element in varying proportions. Is the liquid an element, a compound or a mixture? Give a reason why.
Answer:
It is a mixture
Explanation:
An element comprises of a single type which exists on its own.
A compound comprises of two or more which are bonded together chemically
A mixture comprises of different substances which are combined physically.
!: (a) 20 cm: 80
10. Some mercury is poured into a capillary tube of
uniform bore and one end closed. When the tube
is held horizontally, mercury column has a length
of 4 cm and air enclosed in the closed end has a
length of 10 cm. If the tube is now held vertically,
with open end upwards, the length of the air
column will be (take atmospheric pressure at the
Tale place of experiment to be 760 mm)....
(a) 10.5 cm . (6) 8.5 cm ",JI
(c) 9.0 cm mati (d) 9.5 cm 0
Answer:
THE LENGTH OF THE AIR COLUMN IS 9.5 CM
Explanation:
Taking the atmospheric pressure to be 760 mmHg;
When the capillary tube is held horizontally, the pressure of the tube is 760 mmHg
when the capillary tube is held vertically, the pressure increases by 4 cm = 40 mm
The new pressure of the tube is hence, 760 + 40 mmHg = 800 mmHg
Using the pressure forlmula;
P1 V1 = P2 V2
P1 A1 L1 = P2 A2 L2
where A1 and A2 is the area of the capillary tube and it is equal, it cancels out.
P1 l1 = P2 l2
l2 = P1 l1 / P2
l2 = 760 * 10 / 800
l2 = 9.5 cm
The length of the air in the tube is 9.5 cm.
What is one way engineers have used a material like oobleck to help people?
Answer:
Oobleck has been used to manufacture shoes, filling of portholes, making bullet proof vest.
Explanation:
Oobleck is a non Newtonian fluid which is made from mixture of cornstarch and water. It has both liquid and solid properties. Its act like a liquid when is poured and as a solid when a force act on it. It is a substance that is use in manufacturing shoes. The inside layer of shoes is made of it. It's viscosity increases when there is shear stress. It is use for filling portholes
Answer:
The research could enhance protection of police and soldiers and create softer robots. This cornstarch and water mixture, known as “oobleck,” is a shear thickening liquid that can rapidly switch between a liquid-like and a solid-like state in response to externally applied stress.
Explanation:
if i have about 68.2 grams of H2S, how many moles do i have?
Answer:
2.1 mol
Explanation:
68.1g / 34.1 g/mol = 2.1mol
In birds, having long feathers (L) is dominant to short feathers (l). A homozygous dominant bird and homozygous recessive bird mate. After creating a punnett square, give the genotypes and phenotypes of the four resulting offspring (include the number of each)
Answer:
The four are Ll
The four will have long feathers
Explanation:
A Punnett square is a graphical representation of all possible genotypes of an offspring that is likely to arise from a particular cross or breeding event. To create a Punnett square, knowledge of the genetic composition of the parents is highly required. The two things a Punnett square can tell you are the genotypes and phenotypes of the offspring. In its simplest form, the Punnett square consists of a square divided into four quadrants. A Punnett square allows the prediction of the percentages of phenotypes in the offspring of a cross from known genotypes.
The genotypes of the four offsprings are Ll, Ll, Ll and Ll. This implies that they are all heterozygous. They will all have long feathers since the long feather (L) is dominant in all the species. In terms of phenotype, they will all have long feathers.
how much will 3 moles of Mg(OH)2 weigh?
Answer:
174.9591 Grams mate :) have a good day ily
Explanation:
Malik analyzed three samples to test which element was a metalloid. The table shows his results. A 7-column table with 3 rows. The first column titled element has entries A, B, C. The second column titled lustrous has entries yes, no, yes. The third column titled brittle has entries no, yes, yes. The fourth column titled how it reacts has entries base, acid, acid or base. The fifth column titled boiling point (degrees C) has entries not observed, negative 34.04, not observed. The sixth column titled melting point (degrees C) has entries 97.72, not observed, 1413.85. The seventh column titled electrical conductivity has entries high, very low, medium. Which element (A, B, or C) is most likely a metalloid?
Answer:C is most likely a metalloid
Explanation:A is a metal while B is a non metal. This is because when we look at the properties of metals, they are very lustrous and have a high conductivity. On the other hand, non metals are the opposite but metalloids have properties the are inbetween ie, they react with either an acid or base, and have a medium electrical conductivity unlike metals(high) anc non metals(low).
Answer:
Malik analyzed three samples to test which element was a metalloid. The table shows his results.
A 7-column table with 3 rows. The first column titled element has entries A, B, C. The second column titled lustrous has entries yes, no, yes. The third column titled brittle has entries no, yes, yes. The fourth column titled how it reacts has entries base, acid, acid or base. The fifth column titled boiling point (degrees C) has entries not observed, negative 34.04, not observed. The sixth column titled melting point (degrees C) has entries 97.72, not observed, 1413.85. The seventh column titled electrical conductivity has entries high, very low, medium.
Which element (A, B, or C) is most likely a metalloid?
✔C
Explanation:
Edge 2021
how many molar mass are in BeCl2?
Answer: 79.9182 g/mol