Electromagnetic radiation is reflected or absorbed mainly by several gases in the Earth's atmosphere, among the most important being water vapor, carbon dioxide, and ozone. Some radiation, such as visible light, largely passes (is transmitted) through the atmosphere.
Which substance has the higher boiling point: CH3CH2CH3 or CH3CH2CH2CH2CH3? Explain.
The solid dissolves quickly is a chemical or physical reaction
Answer:
i think it is chemical wait no physical
Explanation:
1. How many moles are in 3.01 x 10^23 molecules of Boron trichloride
Answer: There are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.
Explanation:
According to mole concept, there are [tex]6.022 \times 10^{23}[/tex] molecules present in 1 mole of a substance.
Hence, number of moles present in [tex]3.01 \times 10^{23}[/tex] molecules are as follows.
[tex]Moles = \frac{3.01 \times 10^{23}}{6.022 \times 10^{23}}\\= 0.499 mol[/tex]
Thus, we can conclude that there are 0.499 moles present in [tex]3.01 \times 10^{23}[/tex] molecules of Boron trichloride.
PLS HELP ASAP NO LINKS
What type of scientist studies matter and its composition?
Biologist
Chemist
Physicist
Engineer
Answer:
.biology and maybe physics
Answer:
Biologist
ExplanationBiologist Unlike the above type of scientist, geoscientists’ work involves exploring the earth and its internal environment. They study the composition, structure, and processes of the earth by being indoors and outdoors. They contribute to the discovery of mines, petroleum deposits, minerals, and other aspects of the earth.
The first organisms to arrive in an ecosystem?
How many molecules of oxygen are required to react with 174 g of carbon monoxide?
Answer:
6.22 mol
Explanation:
I think so but I don't know just yet
sorry if im wrong
On the basis of electronegativity differences between atoms, which of the following scientific claims is the most accurate regarding the bonding in Mg(NO3)2(8) ?
A) There is polar covalent bonding between Mg atoms and N atoms.
B) There is polar covalent bonding between Mg atoms and O atoms.
C) There is ionic bonding between N5+ ions and O2- ions.
D) There is ionic bonding between Mg2+ ions and NO3- ions.
There is ionic bonding between Mg²⁺ ions and NO₃⁻ ions. A Further explanation is below.
Ionic bonding seems to be a form of interaction wherein the cationic as well as unpaired electrons are powerfully electrostatically connected.
Throughout the general view, the ionic bonding occurs between someone metal/nonmetal owing to their large electro(-) discrepancy, while bond formation occurs between nonmetals due to the relatively low electro(-) gap.Even though there are metals as well as non-metals, the relative electronegativity differential between (Mg²⁺) and (NO₃⁻) however is large.Thus the above response i.e., option D) is correct.
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As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution?
A) Decreases
B) Increases
C) Remains the same
B) increasesAnswer:
Explanation:
As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution increases. Therefore, the correct option is option B.
What is mole?The World System representing Units (SI) uses a mole (symbol mol) as the unit of material amount. How many fundamental entities of a particular substance are present in an object and sample is determined by the quantity of that material. An elementary entity can be a single atom, a molecule, a pair of ions, an ion pair, even a subatomic particle like a proton depending on the makeup of the substance.
For instance, although having differing volumes and masses, ten molecules of liquid (a chemical compound) because 10 moles of mercurial (a chemical element) both have the same quantity of substance, because the mercury has exactly one atom every every molecular structure of the water. As the concentration of a KOH solution increases, the number of moles of HCl needed to neutralize the KOH solution.
Therefore, the correct option is option B.
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Write the products and balance the equation:
C4H7OH + O2 → CO2 +H2O
Answer:
C4H7OH + 6O2 => 4CO2 + 4H2O
Explanation:
hope This helps :)
13. This is an example of Earth's...
a. revolution.
b. rotation.
C. spiraling
d. turning
A 780.0 g hard-water sample contains 276 mg Ca. What is the concentration in parts per million?
Answer:
353 ppm
Explanation:
PPM also refers to parts per million, it represents a low concentration of a solution. It represents 0.001 gram or a milligram in 1000 mL, equivalent to 1 mg per liter
Given that;
276 mg of Ca in 780.0 g of water
1 ppm = 1 mg/L
780 g = 780 mL = 0.78 L
Therefore;
= 276 mg/ 0.78 L
= 353.84mg/L
= 353 ppm
Select the correct answer.
What change takes place when a liquid absorbs heat energy without increasing its temperature?
A
the pressure increases
B
it vaporizes
с.
it solidifies
D.
the volume decreases
Answer:
It vaporizes.
Explanation:
When a substance absorbs heat energy and doesn't increase its temperature, that means it's going through a change of phase.
The next change of phase for a liquid is turning to a gas, so it vaporizes.
If a 3 L balloon at 2 atm was compressed to 1 L. What is
the new pressure of the balloon?
Answer:
6atm
Explanation:
Using Boyle's law equation as follows;
P1V1 = P2V2
Where;
P1 = initial pressure (atm)
P2 = final pressure (atm)
V1 = initial volume (L)
V2 = final volume (L)
Based on the information provided in this question;
P1 = 2 atm
P2 = ?
V1 = 3L
V2 = 1L
Using P1V1 = P2V2
2 × 3 = P2× 1
6 = P2
P2 = 6atm
The new pressure of the balloon is 6 atm.
explain why an oxygen ion has a larger radius than an oxgen atom
Answer:
Explanation:
The two electrons in the outer orbit, together with the other negatively charged electrons, repel each other and that make the diameter of the O^2- ion larger.
why doesn't food spoil as fast when it is refrigerated
Answer:
food doesn't spoil as fast when it is refrigerated because it would be at room temperature. Because of the lowered temperature, there are less collisions, which slows down the reaction! Due to decomposition reactions with oxygen or carbon dioxide in the air, meat begins to feel slimy and smell spoiled. and member mark me as brainliest
Answer:
A lower temperature slows down the reactions in the food because there are less collisions. The chemical breakdowns and microorganism activity can't work as fast as it used to because of the cold.
al is
Water moves under Earth's surface to fill in open spaces in rocks or soll.
this type of water called?
Please help please!!!!!!!
Answer:
surface water
Explanation:
I hope its correct
Hi!! i REALLY need help with this !! thank you !!
Answer:
proton
A proton is composed of two up quarks, one down quark, and the gluons that mediate the forces "binding" them together.
TH
What is T2 in Kelvin?
178K
204K
0 299K
451K
Answer:
none.
Explanation:
if we are not given any value as temperature in the question. and we were asked to calculate the T1, then our T2 will be 273k.
Draw Conclusions does the F2 generation support that lack of wings is a genetic trait? Explain why or why not
Answer:
An F1 offspring could produce four types of gametes, RY, Ry, rY, and ry. The F2 generation supports the independent-assortment model and refutes the linkage model.
Explanation:
Which features are created by groundwater erosion and deposition? Check all that apply. stalagmites sinkholes rills stalactites gullies rivers
Answer:
Stalagmites
Sinkholes
Stalacites
Explanation:
These features are created because the ground water dissolves solid rocks and move the solid rocks, dissolve solutions beneath the ground water gradually and therefore enlarging the cracks, which eventually form a cave. Ground water carries minerals which are then deposited and can form stalagmites or stalactites. If a stalactite and stalagmite combine together, they usually form a column.
Answer:
a,b,d
Explanation:
join monkee kind ditch humanity :D
calculate the mass in 0.0040 moles of potassium permanganate
how many atoms are present in 14 g of iron
Answer:
1.51 × 10²³ atoms
Explanation:
First, we convert 14g of iron (Fe) to moles using the formula below:
mole = mass ÷ molar mass
Molar mass of Fe = 55.85g/mol
mole = 14g ÷ 55.85g/mol
mole = 0.251mol
The number of atoms in 0.251 mol of Fe is calculated as follows:
number of atoms = n × nA
Where;
n = number of moles
nA = Avagadros number (6.02 × 10²³)
number of atoms = 0.251 × 6.02 × 10²³
number of atoms = 1.51 × 10²³ atoms.
PLZ HELP ILL GIVE BRAINLIST!
How does the energy of the different waves of the spectrum vary with wavelength ?
Answer:
The energy of a wave is inversely proportional to the wavelength of the wave.
As wavelength increases, the energy of the wave decreases.
As wavelength decreases, the energy of the wave increases.
Explanation:
The energy of a wave is directly proportional to the wave's frequency. As frequency increases, so does the energy of the wave.
[tex]E\propto f[/tex] (energy [tex]E[/tex] is proportional to frequency [tex]f[/tex])
How is this related to wavelength?
Frequency is inversely proportional to wavelength. That means that as frequency increases, wavelength decreases and as frequency decreases, wavelength increases.
[tex]f\propto \frac{1}{\lambda}[/tex] (frequency [tex]f[/tex] is inversely proportional to wavelength [tex]\lambda[/tex])
Therefore, as wavelength increases, the energy of a wave decreases and as wavelength decreases, the energy of a wave increases.
[tex]E\propto f\propto \frac{1}{\lambda}[/tex]
If you stay at 90 degrees Celsius and a gas in a liquid solution has a pressure of 2 atm, what solubility should it have if it has a solubility of 64 g/L at a pressure of 8 atm?
Answer:
im not sure
Explanation:
Two glass rods are rubbed together. One of the glass rods are brought near (but
does not touch) an uncharged pith ball. Would you expect the pith ball to attract,
repel, or do nothing? Explain why.
Answer:
Do Nothing
Explanation:
Charges are transferred by friction when two different types of bodies are rubbed together. This is known as charging by friction.
However, when two materials of the same type are rubbed together, no charge is transferred from one object to the other hence there is no transfer of charges by friction and none of the two glass rods are charged.
Therefore, when one of the glass rods is brought close but does not touch the pith ball, nothing happens.
How much energy is required to change 75 grams of copper at 35 degrees Celsius
to liquid copper at 1200 degrees C?
34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
What is Specific Heat?The specific heat is the amount of heat per unit mass required to raise the temperature by one degree Celsius.
It is a measure of how much energy it takes to raise the temperature of a substance. It is the amount of heat necessary to raise one mass unit of that substance by one temperature unit.
It is given by the formula -
Q = mcΔT
where, Q = amount of heat
m = mass
c = specific heat
ΔT = Change in temperature
Given,
Mass of copper = 75g
ΔT = ( 1200 - 35) = 1165⁰C
c = 0.4 J/g ⁰C
Q = mcΔT
= 75 × 0.4 × 1165
= 34950 J
Therefore, 34950 J of energy is required to change 75 grams of copper at 35 degrees Celsius to liquid copper at 1200 degrees Celsius.
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What is the enthalpy of reaction for the decomposition of calcium carbonate?
CaCO3(s) Right arrow. CaO(s) + CO2(g)
A 2-column table with 6 rows. Column 1 is labeled Compound with entries upper C a upper O solid, Upper C a upper C upper O subscript 3 solid, Upper C subscript 6 upper H subscript 6 gas, Upper C upper O subscript 2 gas, Upper H subscript 2 upper O gas, Upper N upper O subscript 2 gas. Column 2 is labeled Delta H subscript f in kilojoules per molecule with entries negative 157.3, negative 1,207.1, 82.90, negative 393.5, negative 241.82, 33.84.
Answer:
First Blank: 656.3 kJ
Second Blank: Endothermic
Explanation:
Edge 21'
Answer:
1. 656.3
2. endothermic
Explanation:
For the equation 3Cu + 8HNO3 → 3Cu(NO3)2 + 2NO + 4H2O, how many units of NO3 are represented on the products side?
I never learned what parentheses mean in chemical reactions
Well anyway no assumptions and no links
Answer:
6
Explanation:
3 * 2 =6
6)
Which formula can represent
an
alkyne?
A)
C₃H6
B)
C₂H4
C)
C3H4
D)
C₂H6
Answer:
c)C3H4
Explanation:
Answer: C. C3H4
Explanation:
I got it wrong and castle learning showed me the answer
6) What is the picture below an example of?
Answer:
The picture below is an example of a food chain.
Explanation:
The bug (can't tell which one by the picture) eats the grass, the frog eats the bug, the snake eats the frog, and the eagle eats the snake.