Answer:
d = 0.5×10¹g/cm³
Explanation:
Given data:
Volume of material = 2 m³
Mass of material = 1×10⁴ Kg
Density of material = ?
Density:
Density is equal to the mass of substance divided by its volume.
Formula
d = m/v
Solution:
Volume of material = 2 m³
1 m³ = 1000000 cm³
2 ×10⁶cm³
Mass of material = 1×10⁴ Kg
1 Kg = 1000 g
1×10⁷ g
by putting values into density formula
d = 1×10⁷ g/2 ×10⁶cm³
d = 0.5×10⁷⁻⁶ g/cm³
d = 0.5×10¹g/cm³
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.
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.
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
Someone please help! this is the last question
I only need help with B.
1. mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3
2. Na₂CO₃ as a limiting reactant
Further explanationGiven
Reaction
2 Al(NO₃)₃ + 3 Na₂CO₃ → Al₂(CO₃)₃ + 6 NaNO₃
Required
mol ratio
Limiting reactant
Solution
The reaction coefficient in the chemical equation shows the mole ratio of the components of the compound involved in the reaction (reactants and products)
1. From the equation mol ratio of Al(NO₃)₃ : Na₂CO₃ = 2 : 3
2. mol : coefficient of Al(NO₃)₃ : Na₂CO₃ = 2 mole/2 : 2 mole/3 = 1 : 0.67
Na₂CO₃ as a limiting reactant (smaller)
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
measuring the weight of an apple
Answer:
what?
Explanation:
One of the most popular club drugs. Originally patented as an appetite suppressant, this
syntetic árug produces fedings of happiness as well as balainations
Answer:
Ecstasy,LSD, Rohypnol
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:
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.
An old lady walks her dog for 12 minutes. How many seconds did she walk the dog for?
60 s = 1 minute
a 72 seconds
b 1200 seconds
c 720 seconds
d 60 seconds
Answer:
The answer is 720 seconds :)
Explanation:
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
modern atomic theory is on_____including Dalton's atomic theory and quantum mechanics, Modern atomic theory is built on es -)) A) Bohr B) nuclear C) plum pudding D) previous models
Answer:
D) Previous models
Got it right on USTestPrep
Answer:
previous models
Explanation:
I did it
According to the passage, as a result of a mutation, an organism
A
will most likely die.
B
will receive chemical radiation.
С
may evolve for better survival.
D
may be duplicated.
Answer: C
Explanation:
According to the passage, as a result of a mutation, an organism may evolve for better survival. The correct option is C.
What is mutation?The mutation is a condition in which genes and DNA sequence changes. Mutation occurs due to mutagens. These mutagens can be biological or chemical. Cells come in contact with these mutagens and undergo mutation.
The mutation causes diseases, due to changes in DNA sequence and genes. People die due to mutation. Sometimes mutation causes the birth of new genes and traits in an organism.
So, in the given condition, the organism will evolve new traits that can be good or necessary for the better survival of the organism. The passage is talking about radiation.
Therefore, the correct option is С, which may evolve for better survival.
To learn more about mutation, refer to the link:
https://brainly.com/question/13923224
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The question is incomplete. Your most probably complete question is given below:
When a cell divides to grow into two new cells, the double helix splits into two single strands of chromosomes, each of which can then replicate a mirror image of itself. This process, called mitosis, happens every time a cell divides, except for sex cells preparing for sexual reproduction. The result is two new cells, each with a double helix of DNA strands identical to that of the original cell.
Though rare, sometimes an error occurs in this process, resulting in a mutation. Radiation or the appearance of other chemicals can increase their frequency. Sometimes an extra base is inserted, substituted, deleted, or damaged. Usually, these mistakes repair themselves, but sometimes they remain and, as a result, can create a change in the coding for a specific trait. If the new trait helps the organism survive, it may be duplicated and passed on to offspring, which, in time, may lead to an evolution in the organism.
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
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.
what are table sugar and baking soda examples of
Answer:
Examples of pure substances include tin, sulfur, diamond, water, pure sugar (sucrose), table salt (sodium chloride) and baking soda (sodium bicarbonate). Crystals, in general, are pure substances. Tin, sulfur, and diamond are examples of pure substances that are chemical elements. All elements are pure substances.
Explanation:
PLEASE MARK ME AS BRAINLIEST
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
Houses and other buildings use circuits that are wired in
____________ ?
Answer:
parallel circuits
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
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
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
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
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.
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Im sorry what ??
Your not being specific
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.
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!:)
Explain why no experiment is a failure.
Answer:
No experiment is a failure, because anytime you mess up, you learn from your mistakes and when you try the experiment again you can fix what you messed up on last time.
List all the ways you can change oceanic crust into continental crust using the sliders.
IS
Answer:
By moving the thickness slide just a little bit to the right and just before the oceanic crust turns to continental crust, I can use either the temperature slider or the composition slider by moving either of them to the right until the oceanic crust turns to be continental crust.
Explanation:
By moving the thickness slider slightly to the right and just before the oceanic crust transitions to continental crust, one can use either the temperature slider or the composition slider to the right until the oceanic crust transitions to continental crust.
What is continental crust?Continental crust, the outermost layer of Earth's lithosphere that forms the planet's continents and continental shelves and is formed near plate boundaries between continental and oceanic tectonic plates.
Almost all of Earth's land surface is made up of continental crust.
The thinner oceanic crust is typically less than four miles thick, whereas the thicker continental crust can be up to 25 miles thick.
Individuals can choose to use the temperature slider or the composition slider to the right through till oceanic crust transitions to continental crust by moving the thickness slider bit to the right and just prior to the oceanic crust transitions to continental crust.
Thus, these are the three ways one can change oceanic crust into continental crust using the sliders.
For more details regarding oceanic crust, visit:
https://brainly.com/question/1101764
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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]
Compare the diagrams of the chemical structures of the two major categories of energy providing molecules in our food: carbohydrates and lipids. What is it about the structure of lipids that causes them to contain so many more calories than an equivalent volume of carbohydrates
Answer:
cfre
Explanation:
