The density of a rectangle : ρ = 0.372 g/cm³
Further explanationGiven
The volume of rectangle : 395 cm³
Mass : 147 g
Required
The density
Solution
Density is a quantity derived from the mass and volume
Density is the ratio of mass per unit volume
Density formula:
[tex]\large {\boxed {\bold {\rho ~ = ~ \frac {m} {V}}}}[/tex]
ρ = density
m = mass
v = volume
Input the value :
ρ = 147 g : 395 cm³
ρ = 0.372 g/cm³
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:
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]
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
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
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
Please Help! Thank You
28.5 L = 1.00647 ft³
Further explanationGiven
28.5 Liters
Required
Convert to cubic feet
Solution
Dimensional analysis (unit analysis) is used to convert one unit to another using a conversion factor
Liters and A cubic foot (ft³) is a unit of volume
cubic feet (ft³) are commonly used in the US
Conversion factor :
1 Liter = 0,0353147 ft³
So for 28.5 Liters :
[tex]\tt 28.5~L\times \dfrac{0.0353147~ft^3}{1~L}=1.00647~ft^3[/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 do you compare the total mass of reactants to the total mass of the products when modeling an equation?
(8th Grade Science)
Answer:
Balance the stoichiometric amounts of both the reactants and the products.
whose photographs were instrumental in the discovery of DNA?
Answer:
Watson and Crick were also aided in their discovery by Maurice Wilkins (1916-2004) and Rosalind Franklin (1920-1958). Franklin had taken X-ray photographs of DNA that her colleague, Wilkins, showed to Watson
Explanation:
Answer:
Rosalind Franklin. She discovered DNA as a double helix form. But men got jealous of her and stole her work just because she is a woman. How cruel! That's why there is something called feminism in this world.
Explanation:
Hope it helped!
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
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.
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
A well-mixed mixture containing a solvent and dissolved a solute.
Answer:
Solution
Explanation:
A solution is a well-mixed mixture containing a solvent and dissolved solute.
It is termed a homogenous mixture.
Solutions are homogeneous mixtures of solutes and solvents. In a solution, the solute particles are distributed uniformly in the solvent. The solute is the substance that is dissolved to make the solution
It is usually present in smaller amount than the solvent. The solvent is the dispersing substance that allows the solute to go into solution.
The solute could be a solid or liquid or gas but usually a liquid. A solution in which the solvent is water is an aqueous solution.
Blood absorbs oxygen and releases carbon dioxide in the lungs' ______.
A. picks up nutrients, water, and waste materials
B. pulmonary circulation
C. the lungs, where it picks up oxygen again
D. capillaries
E. 5
F. systemic circulation
Answer:
B. pulmonary circulation
Explanation:
just a guess
What are the different stages in the cell cycle? (hint: you should have six)
prophase, prometaphase, metaphase, anaphase, telophase and cytokinesis
Explanation:
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)
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
what is this number called?
Answer:
Atomic mass i believe..
What is the answer to Isotope 3?
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.
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.
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.
The speed of light is .99*10^ 8 m/s . Change this to feet-per-minute (ft/min) 1 foot = 0.3048 m, 60.000 sec (exact)= 1 min Unrounded Answer = 5.88583 * 10 ^ 10 ft /min
Answer:
5.88583×10¹⁰ ft/min
Explanation:
From the question given above, the following data were obtained:
Speed of light (in m/s) = 2.99×10⁸ m/s
Speed of light (in ft/min) =.?
Next, we shall convert 2.99×10⁸ m/s to ft/s. This can be obtained as follow:
0.3048 m/s = 1 ft/s
Therefore,
2.99×10⁸ m/s = 2.99×10⁸ m/s × 1 ft/s / 0.3048 m/s
2.99×10⁸ m/s = 980971129 ft/s
Finally, we shall convert 980971129 ft/s to ft/min. This can be obtained as follow:
1 ft/s = 60 ft/min
Therefore,
980971129 ft/s = 980971129 ft/s × 60 ft/min / 1 ft/s
980971129 ft/s = 5.88583×10¹⁰ ft/min
Thus, 2.99×10⁸ m/s is equivalent to 5.88583×10¹⁰ ft/min
Balance each of these equations.
A. NO + O2 NO2
B. Co + O2 Co2O3
C. Al + Cl2 Al2Cl6
D. C2H6 + O2 CO2 + H2O
E. TiCl4 + Na Ti + NaCl
Answer:
A. 2NO + O2 -> 2NO2
B. 4Co + 3O2 -> 2Co2O3
C. 2Al + 3Cl2 -> Al2Cl6
D. 2C2H6 + 7O2 -> 4CO2 + 6H2O
E. TiCl4 + 4Na -> Ti + 4NaCl
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:
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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The uncertainty in the measurement 1500 m is
Answer:
Its 1500 meters, which is equal to 0.9320568 miles. Hope this helps!
Explanation:
How much of earth's freshwater is in the solid state or under ground?
That would be B: 33%, but please correct me if I'm wrong ^^
Answer:
that would be b:33 i believe pls dont blame met
Houses and other buildings use circuits that are wired in
____________ ?
Answer:
parallel circuits
Explanation: