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Given the balanced equation representing a reaction:
2NO + 0, → 2NO, + energy
The mole ratio of NO to NO2 is
A)
1 to 1
B)
2 to 1
C)
3 to 2
D)
5 to 2
A full moon is observed every...
A. 2 weeks.
B. 24 hours.
C. 29.5 days.
D. 365 days
correct=brainliest
Answer:
C
Explanation:
Can someone help me please
Will there ever be grams of a limiting reactant remaining after a reaction has stopped? Why or why not?
Assuming the reaction is complete, there should be no limiting reactant remaining after a reaction. This is because the limiting reactant, by definition, is "the reactant that is completely used up in a reaction."
A closed flask contains gas at STP. If the temperature is raised to 400 K what will the pressure be in atm?
Answer:
The answer is 1.5 atm
Explanation:
The surface temperature of a white dwarf is higher than a red supergiant. True or False
Answer:
True.
Explanation:
PLEASE HELP ME ON THIS QUESTION ASAP!!!!
Answer:
To support the body, protect the organs, produce blood cells, and store calcium.
Which of the following is a chemical property of water at 4°C?
its temperature
its color
its ability to decompose into hydrogen and oxygen
its state
Answer:
At 4°C what is not able to decompose into hydrogen and oxygen chemical changes cannot be reverted, in this case it can. It will not change color, because water is always clear, and won't at this state turn into ice. though it can be reverted.
Explanation:
I hope that is correct that's all I've learned so far!
Answer:
A) Its temperature
Explanation:
Which radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time?
Pu-239
FR-229
Fe-53
P-32
Answer:pu-239
Explanation:
Pu-239 is regarded as the radioisotope requires long-term storage as the method of disposal, to protect living things from radiation exposure over time
Disposal of radioactive nuclear waste is often regarded as a problem.
The waste sources are:
Nuclear power reactors Bomb-related nuclear materialDisposal of bomb-grade plutonium is often difficult.
The longer lived isotopes are:
Plutonium-239 whose t1/2 is 24,110 years, Plutonium-240 whose t1/2 is 6,540 years, Curium-245 whose t1/2 is 8,500 years. etc.The storage of the longer lived elements is through containment for the next several thousand of years.
The control or management of radioactive waste is a hard, multifaceted procedure.
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does all Newton's laws work together
What is the mass of 3.25 moles of sodium hydroxide (NaOH)?
Answer:
1 mole is equal to 1 moles NaOH, or 39.99711 grams.
Explanation:
Hope this helps have a nice day :)
The statement of the mass of sodium hydroxide (NaOH) is "130 g."
What is mass?A substance is something to do with mass that takes up space. The mass of a compound is the total amount of atoms present in grams that make up a molecule. The grams is the unit of mass.
In order to determine the mass in grams, multiply moles of the substance value by its molar mass to convert moles into grams.
Mole to gram conversion factor,
[tex]=\;given \;mole\;.\;\frac{grams}{1\;mol}[/tex]
Mass of NaOH comes out to be,
[tex]=\;3.25\;mol\;.\;\frac{39.997\;g}{1\;mol}[/tex]
= 129.99 g
= 130 g
Hence the correct answer is 130 g.
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Convert 300K to degrees Celsius.
the structure of cyclopentane-1,2-diol
Answer: five carbon atoms forms a ring. In adjacent two carbon atoms
An hydroxyl group (-OH) is attached. Molecular formula is
C5H8(OH)2
Explanation:
Na2SO4(aq) + CaCl2(aq) --> CaSO4(s) +
2NaCl(aq) is an example of which type of
reaction?
decomposition
synthesis
single replacement
double replacement
Answer:
double replacement
Explanation:
What is radiation exactly
radiation is energy that comes from a source. (travels through the speed of light)
A forest has both light colored trees and dark colored trees this same forest had both light colored months and dark colored months one year there is a disease that moves through the forest killing many of the light colored trees when the light colored trees were killed by a disease the forest became almost entirely composed of dark - colored trees generations later almost all months in the forest were dark in color instead of light which of the following gives the most likely explanation for why almost all the months were dark in color.
The dark moths were better hidden from predators and therefore more of them survived and this allowed them to have offspring.
Answer:
The dark moths were better hidden from predators and therefore more of them survived and this allowed them to have offspring.
Explanation:
If all of the light colored trees disappeared and there are only dark colored ones, then that means that the light colored moths wouldn't be able to live long since their traits wouldn't match the environment. This then leads to the conclusion that dark moths would be better hidden since their trait fits their current environment and would let them be hid much better from predators. This would allow them to survive longer and eventually, reproduce.
A compound consists of 14.6% carbon and 85.4% chlorine by mass. What is its empirical formula?
Answer:
[tex]CCl_{2}[/tex]
Explanation:
When calculating an empirical formula from percentages, assume you have a 100g sample. This allows you to convert the percentages directly to grams, because X % of 100g is X grams.
So:
14.6% C = 14.6g C, 85.4%Cl = 85.4g Cl
The next step is to divide each mass by their molar mass to convert your grams to moles.
14.6g/12.01 = 1.22 mol
85.4g/35.45= 2.41 mol
Then you will divide all of your mol values by the SMALLEST number of moles. This gives you whole numbers that are the mole ratio (subscripts) of the empirical formula.
1.22 mol/1.22 mol = 1
2.41 mol/1.22 mol = 2
So the empirical formula is
[tex]CCl_{2}[/tex]
The empirical formula of the compound is CCl2.
HOW IS EMPIRICAL FORMULA CALCULATED:
Empirical formula of a compound is the smallest ratio of elements contained in that compound. The steps for calculating the empirical formula are as follows:14.6% carbon and 85.4% chlorine by mass means the compound has 14.6g of C and 85.4g of ClFirst, we divide each mass by their respective molar mass:C = 14.6g ÷ 12g/mol = 1.22mol
Cl = 85.4g ÷ 35.5g/mol = 2.41mol
Next, we divide each mole value by the smallest value:C = 1.22mol ÷ 1.22 = 1
Cl = 2.41mol ÷ 1.22 = 1.97
Approximately, the carbon to chlorine ratio is 1:2, hence, the empirical formula of the compound is CCl2.
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where are chemicals found?
A.) only in liquids
B.) only in air
C.) in solids,liquids, and gases
D.) only in powders
Answer: c
Explanation: pretty sure its c :]
help plz 8th grade science
Answer:
B
Explanation:
Brainlest is apprciatedddddddddddd
The number of grams of sulfur in 223 grams of sodium sulfate is . . . Grams And explain how, I still dont get it fully
Answer:
50.25 g of sulphur, S.
Explanation:
Mass of Na₂SO₄ = 223 g
Mass of sulphur =?
Next we shall determine the molar mass of Na₂SO₄. This can be obtained as follow:
Molar mass of Na₂SO₄ = (23×2) + 32 + (16×4)
= 46 + 32 +64
= 142 g/mol
Mass of S in 142 g of Na₂SO₄ = 32 g
Finally, we shall determine the mass of S in 223 g of Na₂SO₄. This can be obtained as follow:
142 g of Na₂SO₄ contains 32 g of S.
Therefore, 223 g of Na₂SO₄ will contain = (223 × 32) / 142 = 50.25 g of S.
Thus, 223 g of sodium sulfate, Na₂SO₄ contains 50.25 g of sulphur, S.
if you are curious at to why so many of ur family members have certain hair or eye color, you might want to look at... A. Astrology... B. A family tree... C. Heredity... D.Geometry
Answer:
c) hereditary
Explanation:
This means that if your parents had one eye colour, you'll most likely have the same one because you share the same genes, and it's passed down to you.
A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pressure constant what will the new volume be?
Answer:
A sample of helium gas has a volume of 620mL at a temperature of 500 K. If we ... to 100 K while keeping the pressure constant, what will the new volume be?
Explanation:
A sample of helium gas has a volume of 620. Ml at a temp of 500 K. If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.
What is volume ?Volume is a measurement of three-dimensional space that is occupied. It is frequently expressed quantitatively using SI-derived units, as well as several imperial or US-standard units. Volume and the notion of length are connected.
The capacity of an object is measured by its volume. For instance, a cup's capacity is stated to be 100 ml if it can hold 100 ml of water in its brim. The quantity of space occupied by a three-dimensional object can also be used to describe volume.
According to Charles' Law, at constant pressure,
V1 / T1 = V2 / T2
V1 = 620 ml and T1 = 500K, V2 = ? , T2 = 100K
620 ml / 500K = V2 / 100K
V2 = ( 620 ml ) ( 100K ) / 500K
Volume = 124 ml
Thus, If we decrease the temperature to 100K while keeping the pressure constant 124 ml will the new volume be.
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What makes scientists think that arctic areas were once warm?
they found wooly mammoths there
O they found fossils of horses there
they found fossils of coral there
O the different layers of snow and ice
Answer:well the ice preserves the wooly mammoths
Explanation:its not just snow its bacteria witch means that once living to frozen thats how they know how it looks like and to see what animal its related to now day it related to the elephants
If you can solve both
Will mark brainly
ASAP
Answer:
1. answer is subcutaneous tissue 2. answer is spleen
Explanation:
The subcutis is also known as the hypodermis or subcutaneous layer, and functions as both an insulator, conserving the body's heat, and as a shock-absorber, protecting the inner organs.
Excretory Organs. Organs of excretion include the skin, liver, large intestine, lungs, and kidneys. Together, these organs make up the excretory system.
Answer:
the answer is Subcutaneous Tissue
Explanation:
and the second one is Intestine
What is the molality of a solution of 0.25 moles of sucrose in dissolved in enough water to make 4.00 liters of water?
What is the mass of a 5.00 cm^3 piece of copper having a density of 8.96 g/cm^3
Answer:
44.8 g
Explanation:
Density = mass / Volume
Mass = density x Volume = 8.96x 5 = 44.8 g
A container of nitrogen gashas a pressure of 256.4mm Hg at 362K. If the temperature is decreased to 251K, what is the pressure of the gas in the container?Circle the Correct Answer: (106mmHg or 178mmHg)
What is the molar mass of Zn(NO3)2 ?
Answer:
molar mass of zn( no3) 2
is 189.36 g/ mol
How many moles of Iron (II) oxide are present in a 34.5 gram sample?
Answer:
0.609 Is the answer.
Explanation:
I hope this helped
On a coordinate plane, which single transformation could map point A (3,-4) onto point A' (1.5,-2)? *
Answer: A dilation with rule: [tex](x,y)\to(\dfrac12x,\dfrac12y)[/tex]
Explanation:
A dilation is a non-rigid transformation that creates an image that is the same shape as the original but has a different size.
It uses a scale factor k such that
[tex](x,y)\to(kx,ky)[/tex]
(x,y)= coordinates of original figure
(kx,ky) = corresponding coordinate in the image.
To transform: A (3,-4) onto point A' (1.5,-2).
Using scale factor k= [tex]\dfrac12[/tex], we have
[tex]A(3,-4)\to A'(\dfrac12\times3, \dfrac12\times-4)=A'(1.5,-2)[/tex]
Required rule: [tex](x,y)\to(\dfrac12x,\dfrac12y)[/tex]