Answer:
A thunderstorm is classified as “severe” when it contains one or more of the following: hail one inch or greater, winds gusting in excess of 50 knots (57.5 mph), or a tornado. ... There are about 100,000 thunderstorms each year in the U.S. alone. About 10% of these reach severe levels
Explanation:
what is the mass of the of substance in a beaker that contains 19 moles of pbi2
Answer:
8759g
Explanation:
Given parameters:
Number of moles = 19moles
Unknown:
Mass of PbI₂ = ?
Solution:
To solve this problem, we first find the molar mass of PbI₂;
Molar mass of PbI₂ = 207.2 + 2(126.9) = 461g/mol
Mass of PbI₂ = number of moles x molar mass = 19 x 461
= 8759g
Which type of molecule is used by organisms to store and transmit genetic information?
nucleic acids
proteins
lipids
carbohydrates
Answer:
nucleic acids yw
Explanation:
Answer:
nucleic acids
Explanation:
edg
Whoever gets me right gets whatever they want
Nebulae are large clouds of dust and gas that may eventually form stars and planets. Astronomers originally thought that the Andromeda Galaxy was a nebula until the nature of a galaxy was confirmed. Which of the following shows the relationship between a galaxy and a nebula?
Many galaxies are found inside of a single nebula.
Entire galaxies are created from the gas and dust of a single nebula.
Many nebulae are found inside of a single galaxy.
Nebulae and galaxies combine to form stars.
Answer:
many nebulae are found inside of a single galaxy
Explanation:
Answer:
many nebulae are found inside of a single galaxy
Explanation:
How many moles of carbon dioxide, CO2, are produced when 4.50 moles of propane, C3H8, react?
Moles of Carbon dioxide : 13.5
Further explanationGiven
4.5 moles propane
Required
moles of Carbon dioxide
Solution
Reaction(Combustion of Propane) :
C₃H₈(g)+5O₂(g)→3CO₂(g)+4H₂O(g)
In a chemical equation, the reaction coefficient shows the mole ratio of the reacting compounds (either in reactants or products)
From the equation, mol ratio of Propane(C₃H₈) : Carbon dioxide(CO₂) : 1 : 3, so mol CO₂ :
= 3/1 x mol Propane
= 3 x 4.5 moles
= 13.5 moles
does conduction reflect light?
Answer:
Conduction Should not have anything to do w/ Light.
Explanation:
The reason being is because Conduction is the process by which heat or electricity is directly transmitted through a substance when there is a difference of temperature or of electrical potential between adjoining regions, without movement of the material.
When Barium chloride is formed, what questions will the student need to know prior to making the formula???
Answer:
Valency of the two elements
Explanation:
In order to correctly formularize the compound, the student needs to ask of the valences of the elements involved.
Chlorine has valency of -1, while Barium +2.
The exchange of valency gives the formula [tex]BaCl_{2}[/tex].
Another explanation is that Barium donates 2 electrons which the chlorine atoms accept, in order to form the covalent bond.
I hope this was helpful.
A marble rolls off horizontally from the edge of table top 1.50 m above the floor. it strikes the floor 2.0 m from the base of the table. (a) how long does it take the marble to reach the floor? (b) What is its initial speed?
please help me masters(;´༎ຶٹ༎ຶ`)
a. t=0.553 s
b. vox(horizontal speed) = 3.62 m/s
Further explanationGiven
h = 1.5 m
x = 2 m
Required
a. time
b. vo=initial speed
Solution
Free fall motion
a. h = 1/2 gt²(vertical motion=h=voyt+1/2gt²⇒voy = 0)
[tex]\tt t=\sqrt{\dfrac{2h}{g} }[/tex]
t = √2h/g
t = √2.1.5/9.8
t=0.553 s
b. x=vox.t(horizontal motion)
[tex]\tt x=v_{ox}\times t[/tex]
vox=x/t
vox=2/0.553
vox=3.62 m/s
Calculate the molarity of 8.42 x 102 mL of solution containing 22.4 g of potassium iodide.
Answer:
Molarity = 0.154 M
Explanation:
Given data:
Volume of solution = 8.42 × 10² mL ( 8.42 × 10² /1000 = 0.842 L)
Mass of potassium iodide = 22.4 g
Molarity of solution = ?
Solution:
Number of moles of potassium iodide:
Number of moles = mass/molar mass
Number of moles = 22.4 g/ 166.0 g/mol
Number of moles = 0.13 mol
Molarity:
Molarity = number of moles / volume in L
Molarity = 0.13 mol / 0.842 L
Molarity = 0.154 M
Create a chemical equation for "Bubbling chlorine gas through a solution of sodium bromide gives elemental bromine and a solution of sodium chloride" and balance it.
Answer:
[tex]Cl_{2} +2NaBr ---> 2NaCl + Br_{2}[/tex]
Explanation:
How does genetic variation play a role in evolution? I give Brainless
Answer:
Evolution is the process by which populations of organisms change over generations. Genetic variations underlie these changes
Explanation:
If a trait is advantageous and helps the individual survive and reproduce, the genetic variation is more likely to be passed to the next generation.
Brain-List?
Four gases were combined in a gas cylinder with these partial pressures: 3.5 atm N2, 2.8 atm O2, 0.25 atm At, and 0.15 atm He
Answer:
Total pressure in container = 6.7 atm
Explanation:
Given:
N₂ = 3.5 atm
O₂ = 2.8 atm
At = 0.25 atm
He = 0.15 atm
Find:
Total pressure in container
Computation:
Total pressure in container = N₂ + O₂ + At + He
Total pressure in container = 3.5 + 2.8 + 0.25 + 0.15
Total pressure in container = 6.7 atm
View the video clip below and answer the question.
The video clip above illustrates the process of
Blank 1:
Answer:
i think the answer is accretion
Answer:
Asteroid or exploding planet.
Explanation:
Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.Asteroid or exploding planet.
measuring the weight of an apple
Answer:
what?
Explanation:
How many liters of oxygen gas (O2) are needed to produce 100 kJ of energy at STP? 2C6H6(I) + 1502(g) —> 12CO2(g)+6H2O(g)+3909.9 kJ
Answer: 8.59 L of oxygen gas are needed to produce 100 kJ of energy at STP
Explanation:
According to avogadro's law, 1 mole of every substance occupies 22.4 L at STP and contains avogadro's number [tex]6.023\times 10^{23}[/tex] of particles.
Standard condition of temperature (STP) is 273 K and atmospheric pressure is 1 atmosphere respectively.
1 mole of every gas occupy volume at STP = 22.4 L
The balanced chemical reaction is:
[tex]2C_6H_6(I)+15O_2(g)\rightarrow 12CO_2(g)+6H_2O(g)[/tex]
3909.9 kJ of of energy is produced by = [tex]15\times 22.4=336L[/tex]
100 kJ of oxygen gas are needed to produce = [tex]\frac{336}{3909.9}\times 100=8.59L[/tex]
25 L of a gas is collected at 115 kPa. If the pressure increases to 300 kPa, what is the new volume?
Answer:
V2 = 9.58 Litres.
Explanation:
Given the following data;
Initial volume = 25 L
Initial pressure = 115 kPa
Final pressure = 300 kPa
To find the new volume V2, we would use Boyles' law.
Boyles states that when the temperature of an ideal gas is kept constant, the pressure of the gas is inversely proportional to the volume occupied by the gas.
Mathematically, Boyles law is given by;
[tex] PV = K[/tex]
[tex] P_{1}V_{1} = P_{2}V_{2} [/tex]
Substituting into the equation, we have;
[tex] 115 * 25 = 300*V_{2} [/tex]
[tex] 2875 = 300*V_{2} [/tex]
[tex] V_{2} = \frac {2875}{300}[/tex]
[tex] V_{2} = 9.58 [/tex]
V2 = 9.58 L
Therefore, the new volume is 9.58 litres.
How many moles are equal to 9.03x10^24 molecules of water (H20)?
15.0 mol H₂O
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
BracketsParenthesisExponentsMultiplicationDivisionAdditionSubtractionLeft to RightChemistry
Atomic Structure
Reading a Periodic TableUsing Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
9.03 × 10²⁴ molecules H₂O
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 9.03 \cdot 10^{24} \ molecules \ H_2O(\frac{1 \ mol \ H_2O}{6.022 \cdot 10^{23} \ molecules \ H_2O})[/tex]Multiply/Divide: [tex]14.995 \ mol \ H_2O[/tex]Step 4: Check
Follow sig figs rules and round. We are given 3 sig figs.
14.995 mol H₂O ≈ 15.0 mol H₂O
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Im sorry what ??
Your not being specific
The radioactive isotope carbon-14 can be used for
A) determining medical disorders
B) controlling speeds of neutrons
C) controlling fission reactions
D) determining the age of a sample
To solve this we must be knowing each and every concept related to radioactive isotope. Therefore, the radioactive isotope carbon-14 can be used for determining the age of a sample.
What is radioactive isotope?The radioactive isotopes of such an element are called radioisotopes. They are indeed the atoms with an unstable nuclear configuration of protons and neutrons or excess nuclear energy.
A characteristic of both found naturally elements and isotopes created intentionally is radioactive decay. A radioactive element's half-life, or the amount of time it takes for one-half of any specified amount of the isotope to decay, is used to describe the rate of radioactive element decay. The radioactive isotope carbon-14 can be used for determining the age of a sample.
Therefore, the radioactive isotope carbon-14 can be used for determining the age of a sample.
To know more about radioactive isotope, here:
https://brainly.com/question/1907960
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answer pls pls pls pls
Answer:
3.15*10 to the power of 24
Explanation:
Using the formula we get wavelength = velocity/frequency. substituting the values gives us option B
A balloon is filled with helium gas has a volume of 1.0 L at a pressure of 1.0 atm. The
balloon is released and reaches an altitude where the pressure is now 0.4 atm. What is the
new volume of the balloon at this altitude assuming the air temperature has not changed?
Answer:
2.5 LExplanation:
The new volume of the balloon can be found by using the formula for Boyle's law which is
[tex]P_1V_1 = P_2V_2[/tex]
Since we are finding the new volume
[tex]V_2 = \frac{P_1V_1}{P_2} \\[/tex]
From the question we have
[tex]V_2 = \frac{1 \times 1}{0.4} = \frac{1}{0.4} \\ = 2.5[/tex]
We have the final answer as
2.5 LHope this helps you
a large crystal of potassium magnet is placed in the bottom of a beaker with cold water and left for several hours
What two processes took place
Answer:
Diffusion and Dispersion.
Explanation:
The two processes that took place in the given experiment are Diffusion and Dispersion.
When a crystal of potassium magnet is added placed in the bottom of a beaker which contains cold water, after 5 minutes the particles of potassium magnet will diffuse with water through diffusion process and the colour of water turns purple.
After few hours, the colour of solution goes light purple because the tiny particles which were diffused earlier will dispersed in the water and the particles will spread and make the solution lighter in colour.
Hence, the two processes are Diffusion and Dispersion.
Which two chemicals are products in the following chemical reaction?
PbO2 + 4HCI — PbCl2 + Cl2 + 2H20
A.PbCl2
B.HCI
C.Cl2
D.PbO2
Answer:
A.PbCl2
C.Cl2
Explanation:
[tex] \bold{PbO_2+4HCl\rightarrow PbCl_2+Cl_2+2H_2O} [/tex]
[tex] PbCl_2\:\&\: Cl_2[/tex] are the products in the given chemical reaction.
Hope it helps you in your learning process
When air is cooled, its density...
A. Increases
B. Decreases
C. Remains the same
Answer + Explanation:
When air is cooled, its density increases.
A. increases
Answer:
The answer to your question is A.
Explanation:
when air is cooled, it's density Increases
What is the molar mass of Ni(ClO3)3
Answer:
308.049 g/mol
Explanation:
Given:
Ni(ClO₃)₃
Computation:
Mass of nickel (Ni) = 58.69 g/mol
Molar mass of Cl = 35.453 g/mol
Molar mass of Cl = 16 g/mol
so,
58.69 + 3[35.453+3(16)]
58.69 + 3[35.453+48]
308.049 g/mol
What is the charge on one ATOM of plasma?
•negative
•positive
Name at least two benefits coral reefs provide.
Name at least two benefits coral reefs provide.
Answer:
1. provide habitats and shelter for many marine organisms 2. Coral reefs protect coastlines from storms and erosion 3. provide jobs for local communities
Explanation:
Answer:
Coral reefs are home to more species of fish and marine invertebrates than any other habitat in the world. Coral reefs protect beaches and shorelines from the impact of waves. Without coral reefs, beaches and shorelines can be severely damaged or washed away. Corals also produce unique chemicals that have potential uses in medicine.
Explanation:
trust me
Read the passage below and choose the best answer for the main idea of the passage:
Footprints offer clues about where we came from and where we're headed. Their impressions tell us something
about the animals that leave them. But while actual footprints offer details on size, weight and speed, carbon
footprints measure how much carbon dioxide (CO2) we produce just by going about our daily lives. A drive to work,
a flip of a light switch and a flight out of town all rely on the combustion of fossil fuels like oil, coal and gas. When
fossil fuels burn, they emit greenhouse gases like CO2 that contribute to global warming. Ninety-eight percent of
atmospheric CO2 comes from the combustion of fossil fuels.
a. Footprints come in all shapes and sizes.
C. Global warming comes from the emission of
CO2 into the atmosphere.
d. No one should be allowed to drive because
it causes global warming.
b. We study footprints to learn about the
animals who leave them.
Answer: C
Explanation:
describe how you would calculate the answer for the question above what is the mass of 3.20 x 10 ^ 23 particles of CO2
Answer:
you would do the exponents first (10 times 23) and then multiply that (230) and 3.20.
Explanation:
That should be correct!:)
What do we call the modern atomic theory? What scientists' ideas is it a combination of?
Answer:
•Atomic theory, ancient philosophical speculation that all things can be accounted for by innumerable combinations of hard, small, indivisible particles (called atoms) of various sizes but of the same basic material; or the modern scientific theory of matter according to which the chemical elements that combine to form the great variety of substances consist themselves of aggregations of similar subunits (atoms) possessing nuclear and electron substructure characteristic of each element. The ancient atomic theory was proposed in the 5th century BC by the Greek philosophers Leucippus and Democritus and was revived in the 1st century BC by the Roman philosopher and poet Lucretius. The modern atomic theory, which has undergone continuous refinement, began to flourish at the beginning of the 19th century with the work of the English chemist John Dalton. The experiments of the British physicist Ernest Rutherford in the early 20th century on the scattering of alpha particles from a thin gold foil established the Rutherford atomic model of an atom as consisting of a central, positively charged nucleus containing nearly all the mass and surrounded by a cloud of negatively charged planetlike electrons.
•With the advent of quantum mechanics and the Schrödinger equation in the 1920s, atomic theory became a precise mathematical science. Austrian physicist Erwin Schrödinger devised a partial differential equation for the quantum dynamics of atomic electrons, including the electrostatic repulsion of all the negatively charged electrons from each other and their attraction to the positively charged nucleus. The equation can be solved exactly for an atom containing only a single electron (hydrogen), and very close approximations can be found for atoms containing two or three electrons (helium and lithium). To the extent that the Schrödinger equation can be solved for more-complex cases, atomic theory is capable of predicting from first principles the properties of all atoms and their interactions. The recent availability of high-speed supercomputers to solve the Schrödinger equation has made possible accurate calculations of properties for atoms and molecules with ever larger numbers of electrons. Precise agreement with experiment is obtained if small corrections due to the effects of the theory of special relativity and quantum electrodynamics are also included.
I hope it's help you
If you knew the number of valence electrons in a nonmetal atom how would you determine the valence of the element. (Ignore hydrogen)
Answer:
The possible valances can be determined by electron configuration and electron negativity
Good Luck even though this was asked 2 weeks ago
Explanation:
All atoms strive for stability. The optima electron configuration is the electron configuration of the VIII A family or inert gases.
Look at the electron configuration of the nonmetal and how many more electrons the nonmetal needs to achieve the stable electron configuration of the inert gases. Non metals tend to be negative in nature and gain electrons. ( They are oxidizing agents)
For example Florine atomic number 9 needs one more electron to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Flowrine has a valance of -1
Oxygen atomic number 8 needs two more electrons to reach a valance number of 8 electrons to equal Neon atomic number 10. Hence Oxygen has a valance charge of -2.
Non metals with a low electron negativity will lose electrons when reacting with another non metal that has a higher electron negativity. When the non metal forms an ion it is necessary to look at the electron structure to determine how many electrons the element can lose to gain stability.
For example Chlorine which is normally -1 like Florine when it combines with oxygen can be +1, +3, + 5 or +7. It can lose its one unpaired electron, or combinations of the unpaired electron and sets of the three pairs of electrons.
