An example would be oil. Oil is considered to be hydrophobic (which translates to "fear of water" so it is repelled by water). It floats on the top of water, which is why oil spills result in black blobs that float on the surface of the ocean rather than mix underneath the surface.
What 2 locations have the greatest kinetic energy
Answer:
what??? Is this the complete quetion??
How do you find the volume of a linear object?
A hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:
En = −(2.18 × 10^−18J) Z^2 ( 1/n^2 )
where n is the principal quantum number and Z is the atomic number of the element. Plasma is a state of matter consisting of positive gaseous ions and electrons. In the plasma state, a mercury atom could be stripped of its 80 electrons and therefore could exist as Hg80+. Use the equation above to calculate the energy required for the last ionization step.
hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:
En = −(2.18 × 10^−18J) Z^2 ( 1/n^2 )
where n is the principal quantum number and Z is the atomic number of the element. Plasma is a state of matter consisting of positive gaseous ions and electrons. In the plasma state, a mercury atom could be stripped of its 80 electrons and therefore could exist as Hg80+. Use the equation above to calculate the energy required for the last ionization step.hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:
En = −(2.18 × 10^−18J) Z^2 ( 1/n^2 )
where n is the principal quantum number and Z is the atomic number of the element. Plasma is a state of matter consisting of positive gaseous ions and electrons. In the plasma state, a mercury atom could be stripped of its 80 electrons and therefore could exist as Hg80+. Use the equation above to calculate the energy required for the last ionization step.hydrogen-like ion is an ion containing only one electron. The energy of the electron in a hydrogen-like ion is given by:
En = −(2.18 × 10^−18J) Z^2 ( 1/n^2 )
where n is the principal quantum number and Z is the atomic number of the element. Plasma is a state of matter consisting of positive gaseous ions and electrons. In the plasma state, a mercury atom could be stripped of its 80 electrons and therefore could exist as Hg80+. Use the equation above to calculate the energy required for the last ionization step.
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Which method is the best way to separate a mixture of recycled glass and iron
Answer:
Use a magnet
Explanation:
Magnet will pull out the iron and the glass will remiain there
Answer: Sorting by magnetism
Explanation: quiz
the kenetic energy of a roller coaster is 100 joules. the potential energy of the same coaster is 100 joules. what is the mechanical energy of the coaster
You are given a food sample in powder form. How do you determine the food class of the food sample?
If I were given a food sample in powdered form I would determine the food class of the food sample by adding some water to it. By adding water to the Powder the nature of the the food can be easily determined based on the solubility of the Powder in water.
When a liquid becomes a gas the process is called
Answer:
Evaporation
Explanation:
Evaporation is a process of water changing into vapor when heated.
The process is called evaporation
What are the intermolecular forces present in acetone?.
Answer:
dipole-dipole forces will be present.
Explanation:
dipole will be present because Water has a dipole and can also hydrogen bond, as can isobutyl alcohol.
which force holds distant stars and other matter together?
Answer:
Gravity is the force that holds everything in the universe together.
Hope that helps!
What is the position of the dog
Answer:
what dog
Explanation:
you did not show a dog
A hydrogen atom absorbs a photon of visible light and its electron enters the n = 4 energy level. Calculate the change in energy of the atom and the wavelength (nm) of the photon.
Determine the amount of moles of SiO2 needed to produce 4.80g of CO.
SiO2(s) + _C(s) — _SiC(s) + I co(g)
A)134 mol
B)0.171 mol
C)67.2 mol
D) 0.0857 mol
Which is a major environmental concern for our oceans?
Question 5 options:
oxygen pollution
plastic pollution
nutrient pollution
air pollution
Determine the volume in mL of 0.242 M NaOH(aq) needed to reach the equivalence (stoichiometric) point in the titration of 46.79 mL of 0.204 M propanoic acid(aq). The Ka of propanoic acid is 1.3 x 10-5.
The volume (in mL) of 0.242 M NaOH solution needed for the titration reaction is 39.44 mL
Balanced equationCH₃CH₂COOH + NaOH —> CH₃CH₂COONa + H₂O
From the balanced equation above,
The mole ratio of the acid, CH₃CH₂COOH (nA) = 1The mole ratio of the base, NaOH (nB) = 1How to determine the volume of NaOHVolume of acid, CH₃CH₂COOH (Va) = 46.79 mL Molarity of acid, CH₃CH₂COOH (Ma) = 0.204 MMolarity of base, NaOH (Mb) = 0.242 MVolume of base, KOH (Vb) =?MaVa / MbVb = nA / nB
(0.204 × 46.79) / (0.242 × Vb) = 1
Cross multiply
0.242 × Vb = 0.204 × 46.79
Divide both side by 0.242
Vb = (0.204 × 46.79) / 0.242
Vb = 39.44 mL
Thus, the volume of NaOH needed for the reaction is 39.44 mL
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Does doubling the temperature for a reaction cut the activation enegry in half?
In general, if you double the temperature you double the reaction rate. However, this does not mean the activation energy is cut in half
Which of the following does not describe an object with high
elasticity?
a
A piece of paper that rips after pulling on it.
b A spring that easily compresses when pushed.
A slinky that expands and contracts when held at
one end.
d A rubber band that stretches when you pull on it.
Chockit
Answer:
Explanation:
C
WILL GIVE BRAINLIEST
which statement describes all chemical changes but not physical changes
Answer:
answer is b
Explanation:
What happens to the rate of reaction as the reactants get used up in a reaction?
Answer:So, when a reactant gets used up, its concentration decreases, and so the total reaction rate decreases. As you can see here, more products equal less reagents (reactants), and so the reaction rate decreases.
Explanation: i hope this helps!! :)))
what is the mass of fructose also known as fruit sugar (c6h12o6) in a 1.38×10^2ml sample of glucose solution that has a concentration of a 1.04m
Answer:
its 1.04
Explanation:
how does crushing affect solubility
Answer:
I think crushing affect solubility in that it increases the surface area of the solute in contact with the solvent
Jerry pushes a 3.2 kg box with an acceleration of 5.6 m/s^2.what is the resultant force?
Answer:
1.5 N, mass m= 3.2 kg. F = m * a. 1.5 = 3.2 * a
Explanation:
What is the compound name of CrS3?
Answer:
Chromium (VI) sulfide
Explanation:
It is an ionic bond, hence the roman numeral.
How many atoms are in 3.5 L of Neon at STP? Show your work!
Answer:
the answer to the question is 0.1734
Explanation:
3.5g=1mole of Ne/20.18g
=0.1734
When aqueous solutions of (NH4)2CrO4 and Ba(NO3 )2 are combined, BaCrO4 precipitates. Calculate the mass, in grams, of the BaCrO4 produced when 2.76 mL of 0.19 M Ba(NO3 )2 and 3.86 mL of 0.716 M (NH4)2CrO4 are mixed. Calculate the mass to 3 significant figures
The mass, in grams of BaCrO4 that will be produced, according to the illustration, would be 0.1329 grams
Stoichiometric calculationsFrom the equation of the reaction:
Ba(NO3)2 + (NH4)2CrO4 → BaCrO4 + 2(NH4)NO3
The mole ratio of the reactants is 1:1.
Mole of (NH4)2CrO4 = 3.86/1000 x 0.716
= 0.0028 moles
Mole of Ba(NO3 )2 = 2.76/1000 x 0.19
= 0.0005 moles
Thus, Ba(NO3 )2 is limiting in availability.
Mole ratio of Ba(NO3 )2 and BaCrO4 = 1:1
Mole equivalent of BaCrO4 = 0.0005 moles
Mass of 0.0005 moles BaCrO4 = 0.0005 x 253.37
= 0.1329 grams
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a person stretches a spring apart in their figures and holds it there, not moving this is an exmple of?
A.Potential energy turning into kinetic energy
B. Someone creating energy
C. Someone destroying energy
D. Kinetic energy turning into potential energy
Answer:
pretty sure D is the right answer
Explanation:
kinetic energy is energy of motion, potential is energy that is stored
Calculate the pH when 60.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10⁻⁴).
When a volume of 60.0 mL of 0.200 M HBr is mixed with a volume of 30.0 mL of 0.400 M CH3NH2, The pH value is mathematically given as
pH=10.64
What is the pH value when 60.0 mL of 0.200 M HBr is mixed with 30.0 mL of 0.400 M CH₃NH₂?Question Parameters:
The pH when 60.0 mL of 0.200 M HBr
30.0 mL of 0.400 M CH₃NH₂ (Kb = 4.4 × 10^{-4}).
Generally, the equation for the Chemical Reaction is mathematically given as
H Br + H_3C NH_2----- > CH_3 NH_3 Br
Therefore
oH=p^{kb}+-log[tex]\frac{salt}{base}[/tex]
OH=-log(4.4*10^{-4})+[tex]\frac{0.1}{0.1}[/tex]
OH=3.36
In conclusion, The equation pH value
pH+OH=14
Therefore
pH+=14-3.36
pH=10.64
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Which elements are more likely to lose electrons?
Ca, Li, F and Ne
Element “X” is a brand new element. Scientists discovered that 80% of the atoms of element
“X” have a mass number of 10 amu and the other 20% have a mass of 11 amu. What is the avg.
atomic mass of element "X"?
Answer:
Average atomic mass of X is 10.2 amu.
Explanation:
Given data:
Percentage abundance of X-10 = 80%
Percentage abundance of X-11 = 20%
Average atomic mass of X = ?
Solution:
Average atomic mass of X = (abundance of 1st isotope × its atomic mass) +(abundance of 2nd isotope × its atomic mass) / 100
Average atomic mass of \X = (80×10)+(20×11) /100
Average atomic mass of X = 800 + 220 / 100
Average atomic mass of \X = 1020 / 100
Average atomic mass of X = 10.2 amu
Which change of state involves a release of energy?
boiling
condensation
melting
sublimation
Answer:Condensation
Explanation:I just took it:/
The phase changes occur when the substances undergoes transition between different states of matter. All phase changes involve either gain or release of energy. Here condensation involves a release of energy. The correct option is B.
What is condensation?The process through which the physical state of matter changes from the gaseous phase into the liquid phase is defined as the condensation. The condensation occurs when water vapor in the air changes into liquid water when it comes in contact with a cooler surface.
During condensation molecules in the gaseous state release energy to change state to a liquid. The opposite of the condensation is the evaporation. At high pressure and low temperature any gas can condense.
Condensation is also important to the water cycle as it is responsible for the formation of clouds and maintains water balance.
Thus the correct option is B.
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