Answer:
Because the sun is low on the horizon, sunlight passes through more air at sunset and sunrise than during the day, when the sun is higher in the sky. More atmosphere means more molecules to scatter the violet and blue light away from your eyes.
PLEASE HELP!!!!! 10 POINTS!!
What electron could have quantum numbers n=3, l=0, ml=0, ms=-1/2
Answer:
Explanation:
It is a 3s electron
Is the following chemical equation balanced? 1 C2H6+ 102 - 3 H2O + 2
CO2 *
Answer:
No
Explanation:
Answer: smallest whole numbers are 2, 7, 4 and 6
Explanation: C2H6 + 3.5 O2. ⇒ 2. CO2 + 3 H2O
how moles are there in 15 grams of SiO2
Which statement best explains how the conditions identified in Part A affect the availability of opal?
A
Weathering processes no longer occur in Australia, so no new opal is formed.
B
Gems do not need an exact combination of elements or minerals to form, so opal forms more easily.
C
Opal formation occurs over large periods of time, so the number of opal deposits is limited.
D
Volcanoes in Australia no longer provide high temperatures and pressures, so no new opal is formed.
Answer:
C
Explanation:
please help me with this chem question!!
Answer:
caca123
Explanation:
UM
Use the kinetic energy equation to explain why speed has a greater impact on kinetic energy than mass.
Answer: Hopefully this helps! sorry if not. :))
Speed has a greater impact on mass because its increases in velocity have an exponentially greater impact on translational kinetic energy because kinetic energy is proportional to velocity squared. Doubling an object's mass would only double its kinetic energy, however doubling its momentum would quadruple its velocity.
Please help me find the correct answer, thank you.
Answer:
The third line
Explanation:
The first one us wrong because they're not all found inside,electron is outside.
The second one is wrong as I explained previously.
Lastly the fourth line is wrong because protons are found in the nucleus.
Can carbon and hydrogen form double bonds between them?
Answer:
Carbon has four valence electrons, so it can achieve a full outer energy level by forming four covalent bonds. When it bonds only with hydrogen, it forms compounds called hydrocarbons. Carbon can form single, double, or triple covalent bonds with other carbon atoms.
The carbon-hydrogen bond (C–H bond) is a bond between carbon and hydrogen atoms that can be found in many organic compounds. This bond is a covalent bond meaning that carbon shares its outer valence electrons with up to four hydrogens. This completes both of their outer shells making them stable.
^Hope it helps, Hazel^
HELP PLS THANK YA!!!
Answer:
there is the answers. hope this helps
1.The symbol of an atom changes when the number of _______
changes.
2.The net charge of an atom depends on ___________ and
_________.
3.The atom is neutral when ________ and _________ are equal.
4.The mass number of an atom depends on __________ and
_________.
Answer:
1. proton
2. electrons and protons
3. protons and electrons
4. protons and neutrons
Explanation:
What is the most general name for any single type of matter that is made from a specific arrangement of atoms?
A.
substance
B.
solid
C.
molecule
D.
element
Answer:
The answer is C. substance
Explanation:
I did this on study island and got it right, hope you enjoy.
Help help please please help!!!!!!!
Answer: 1. 6 x 10*6
2. 9 x 10*3
3. 6 x 10*1
4. 5.4 x 10*6
5. 6 x 10*0
6. 2 x 10*7
Explanation:
Help if possible!
Picture attached with the problems.
A gamma ray emission results in the release of energy without any apparent change in mass or nuclear charge.
Answer:
the answer to this is b thanks for
Answer:
True
A Gamma-Ray emission results in the release of energy without any apparent change in mass or nuclear charges
Please help me out this is a test.
The imaje shows a plate baundary. Arrows have been added to indicate the movement if the plates.
IS ANYONE GOOD WITH CHEMISTRY???! i need help lol
Answer:
Help with what?
Explanation:
Answer:
help with whattt
Explanation:
um
The specific heat of nickel is 0.445 J/g degree Celsius. How much heat is required to heat a 168 gram piece of nickel from 15.2 degrees Celsius to 43.6 degrees Celsius?
Dos objetos presentan fuerzas eléctricas repulsivas entre sí. ¿Cómo pueden ser las cargas eléctricas de estos objetos?
Answer:
Las cargas eléctricas de los objetos son ambas positivas o son ambas negativas.
Explanation:
Si dos objetos presentan fuerzas eléctricas repulsivas entre sí, quiere decir que ambos tienen el mismo tipo de carga.
Las cargas iguales (positivo con positivo, o negativo con negativo) se repelen, mientras que las cargas diferentes (positivo con negativo) se atraen.
write word equation for the reaction between dil hydrochloric acid with zinc oxide
Answer:
Zinc Oxide + Dil. Hydrochloric Acid -----> Zinc Chloride + Water
If you have a cup of water at 35 degrees Celsius, and a bath tub of water at 35 degrees Celsius which will melt the most ice and why?
A scientist combines three atoms of chlorine and six atoms of sodium resulting in a chemical reaction. How many atoms of chlorine must be in the product?
I uploaded the answer to a file hosting. Here's link:
bit.[tex]^{}[/tex]ly/3a8Nt8n
HELP PLEASE
an unknown gas has a pressure of 121.6 kPa, a volume of 31 L and a Temperature of 256K. How many moles of gas
are there?
Answer:
0.031moles
Explanation:
ok so it would help if I knew the marks but 1 mole = 1000L so if the volume was 31L then if you convert you will get that answer
The moles of gas at the given sample of gas is 1.7 moles.
What is ideal gas equation?Ideal gas equation gives idea about the behavior of gas at different condition & represented as:
PV = nRT, where
P = pressure = 121.6 kPa = 1.2 atmV = volume = 31 Ln = moles = ?R = universal gas constant = 0.082 L.atm / K.molT = temperature = 256KOn putting all these values, we get moles as:
n = (1.2)(31) / (0.082)(256) = 37.2 / 20.9
n = 1.7 moles
Hence required moles of gas is 1.7 mole.
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In any engineering design problem, the first step is to understand the problem and identify one or more possible solutions. In this task, you’ll analyze the problems you face as the chemical engineer challenged with setting up the ammonia-making process. Recall the chemical equation for producing ammonia:
N2 + 3H2 ⇌ 2NH3 + energy
2.How can you change the chemical equilibrium to benefit the company? What benefits will be realized?
Answer:
Explanation:
2NH3(g)(→ N2(g)(+(3H2(g)
Eventually, these two reactions occur at the same rate. When this happens,
the concentrations of nitrogen, hydrogen, and ammonia become constant, and the
system is said to be “at equilibrium”. Typically,
we represent chemical equilibrium
using a double-headed reaction arrow:
How do you recognize substances that have gone through physical or chemical changes?
How many grams of magnesium
sulfate (MgSO4) are dissolved in
0.965 L of a 0.0575 M solution?
Molar Mass Mg: 24.30 g/mol
Molar Mass S: 32.06 g/mol
Molar Mass O: 16.00 g/mol
Explanation:
Concentration question....
0.965L x (0.0575 mol MgSO4 / 1L) x (120.4g MgSO4 / 1 mol MgSO4) = 6.68g MgSO4
The concept molarity is used here to determine the grams of magnesium sulfate dissolved in 0.965 L of a 0.0575 M solution. The mass of magnesium sulfate in grams is 6.68 g.
What is molarity?The molarity of a solution is defined as the number of moles of the solute present per litre of the solution. It is generally represented by the unit mol/L. The equation used to calculate the molarity is:
Molarity = Number of moles of the solute / Volume of the solution in litres
The molar mass of MgSO₄ = 120.36 g/mol
We have 0.0575 M solution.
That is 0.0575 mol/L × 120.36 g/mol = 6.9207 g/L
Here we want mass in 0.965 L. So the mass is:
Mass = 0.965 L × 6.9207 g/L = 6.68 g
Thus the mass in grams of magnesium sulfate is 6.68 g.
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How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2? How many moles of mercury is produced?
Laughing gas (nitrous oxide, N2O) is sometimes used as an anesthetic in dentistry. It is produced when ammonium nitrate is decomposed according to the following reaction.
NH4NO3(s) ---> N2O(g) + H2O(l) How many grams of NH4NO3 are required to produce 33.0 g N2O? and How many grams of water are produced in this reaction?
Answer: 7.81 mol HgO (How many moles of mercury(II) oxide, HgO, are needed to produce 125 g of oxygen, O2?)
Explanation:
What type of shape does a liquid have?
Answer:
no definite shape
Explanation:
Answer:
Liquids have no definite shape (takes the shape of its container) they have a definite volume. Particles are free to move over each other, but are still attracted to each other.
Explanation:
Hope this helps!
Please help me find the answer, thank you.
Answer:
Chlorine hope i helped.
Explanation:
For a reaction to be in equilibrium.... *
A. concentration of reactants and products remain constant
B. concentration of reactants and products must be the same
C. the rate of forward reaction is not equal to the rate of backward reaction.
Answer: C) the rate of forward reaction is not equal to the rate of backward reaction. This should be the answer.
Explanation:
How many milliliters of 4.00 M NaOH are required to exactly neutralize 50.0 milliliters of a 2.00 M solution of HNO3 ?
Answer: The volume of [tex]NaOH[/tex] required is 25.0 ml
Explanation:
According to the neutralization law,
[tex]n_1M_1V_1=n_2M_2V_2[/tex]
where,
[tex]n_1[/tex] = basicity [tex]HNO_3[/tex] = 1
[tex]M_1[/tex] = molarity of [tex]HNO_3[/tex] solution = 2.00 M
[tex]V_1[/tex] = volume of [tex]HNO_3[/tex] solution = 50.0 ml
[tex]n_2[/tex] = acidity of [tex]NaOH[/tex] = 1
[tex]M_1[/tex] = molarity of [tex]NaOH[/tex] solution = 4.00 M
[tex]V_1[/tex] = volume of [tex]NaOH[/tex] solution = ?
Putting in the values we get:
[tex]1\times 2.00\times 50.0=1\times 4.00\times V_2[/tex]
[tex]V_2=25.0ml[/tex]
Therefore, volume of [tex]NaOH[/tex] required is 25.0 ml
The volume of 4.00 M NaOH is required to exactly neutralize 50.0 ml of a solution of a 2.00 M solution of [tex]HNO_3[/tex] is 25.0 ml.
What is [tex]HNO_3[/tex]?[tex]HNO_3[/tex] is nitric acid also known as the spirit of niter. It is colorless in its original form but appears yellow-colored.
By the neutralization law
[tex]n_1M_1V_1 = n_2M_2V_2[/tex]
n1 = 1
M1 = 2.00
M2 = 4.00
V1 = 50.0 ml
n2 = NaOH = 1
Putting the value in the formula
[tex]1 \times 2.00 \times 5.00 ml = 1 \times 4.00 \times V_2\\\\V_2 = 25.0\; ml[/tex]
Thus, the volume of NaOH required is 25.0 ml.
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