Answer:
15 grams of water will absorb 2,500 Joules in going from 20.0 to 60.0 C.
Explanation:
The heat involved in raising a mass (m) of a substance with a specific heat (c) from one temperature to another (Delta T) is given by:
Heat = mc(Delta T)
2,500 Joules = m*(4.186J/gC)*(60C-20C)
2,500 Joules = m*(4.186J/gC)*(40C)
2,500 Joules = m*(4.186J/gC)*(40C)
m = (2,500J)/(4.186*40J/g)
m = 14.93 grams
Answer: B (15g)
Explanation:
the ability to roll your tongue allele T is dominant to the allele t inability to roll your tongue. if mother is a homozygous tongue roller TT and father tt can't roll his tongue. what possible offspring will they have?
Answer:
homozygote
Explanation:
Because tongue-rolling is recessive, the only way a person would be unable to roll his/her tongue would be if s/he were homozygous mutant.
why can't amylase digest other substances?
Explanation:
saliva contains and amylase which randomly hydrogen all the one is equal to 4 glycosidic bonds of stars except it's out most bones and those next the branches on the hand glycogen being a highly branched molecule it is evident that amylase won't be a good animal eyes to digest it due to physical structure constance
The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab. How many moles of dextrose is this equivalent to?
The AP Biology teacher is measuring out 638.0 g of dextrose (C6H12O6) for a lab the moles of dextrose is this equivalent to is 3.6888 moles.
What are moles?A mole is described as 6.02214076 × 1023 of a few chemical unit, be it atoms, molecules, ions, or others. The mole is a handy unit to apply due to the tremendous variety of atoms, molecules, or others in any substance.
To calculate molar equivalents for every reagent, divide the moles of that reagent through the moles of the restricting reagent. The calculation is follows:
655/12 x 6 + 12+ 16 x 6 = 655/ 180 = 3.6888 moles.Read more about moles:
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Warning signs are sometimes placed on aerosol cans to prevent people from throwing them into a fire. What is true about the gas in the aerosol can after it is placed in a fire? Check all that apply.
Answer:
If the gas in the aerosol is placed in a fire then the volume will remain constant.
Explanation:
Avogadro's Law provides the formula needed to determine the relationship between the gas amount and volume present in a container.
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How does nuclear fission occur?
A) Protons gather in the nucleus of Uranium atoms and cause the nucleus to explode and release energy in the form of heat.
B) Neutrons smash into the nucleus of Uranium atoms. The neutrons are then split in half and release the energy in the form of heat .
The table describes solids and plasmas.
-
Which statement can be placed in the blank cell to make the information in the table accurate?
can be crystalline
can be amorphous
are made of charged particles
are made of neutral particles
The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
Meaning of plasmaPlasma can be defined as a form of matter, though its not as common as the three major forms of matter.
Plasma displays more of the features of a gas but it is not a gas. it has more density than a gas and is less dense than liquid and solid
In conclusion, The statement that can be placed in the blank cell to make the information in the table accurate is Plasma : (D). are made of neutral particles
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Answer:
Answer is (D) or fourth option
Explanation:
Plasmas are made of neutral particles
(a) write the net acid-base reaction that occurs when hi is added to water. (use the lowest possible coefficients. omit states-of-matter in your answer.)
The net acid-base reaction that occurs when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
What is an acid base reaction?A acid base reaction involves the transfer of a proton in the Bronsted- Lowry sense. In this case, the acid is the lone pair donor while the base is the lone pair acceptor.
Thus;
HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq). This the net acid-base reaction that occurs when HI is added to water.
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The net acid-base reaction that takes place when HI is added to water is HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
What is an acid-base reaction?
An acid-base reaction involves the shift of a proton in the Bronsted Lowry sense. The acid is the lone pair giver while the base is the lone pair acceptor(takes the lone pair). The acid and base reaction will rely upon the strength of the acid and base. This eventually means if the reaction is between a strong acid and a weak base then its result will differ from the reaction between a strong acid and a strong base or a weak acid and a weak base.
Therefore; HI(aq) + H2O(l) ⇄ H3O^+(aq) + I^-(aq).
The above-mentioned equation is the net acid-base reaction that occurs when HI is added to water.
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What is the source of energy in nuclear power plants?
Answer:
URANIUMExplanation:
What is the source of energy in nuclear power plants?
Uranium is the fuel most widely used by nuclear plants for nuclear fission. Uranium is considered a nonrenewable energy source, even though it is a common metal found in rocks worldwide. Nuclear power plants use a certain kind of uranium, referred to as U-235, for fuel because its atoms are easily split apart.
what is the percent yield of sulfur dioxide if the burning of 25.0 g of carbon disulfide produces 40.5 g of sulfur dioxide?
Answer:
25-54-46-36 619-73 77-88-50
several balls and sticks glued together to represent a molecule
Answer:
The different elements are represented by their symbols one line shows a single bond and two lines show a double bond. This written representation is called a structural diagram
According to the concept of entropy, what will likely happen to most molecules over time?.
They're going to fall apart.
What most molecules will likely experience over time?A system's entropy cannot decrease unless heat is being lost from it. This indicates that entropy cannot decrease in a closed system (i.e., nothing enters or leaves, and that means nothing at all), so it must either remain constant or rise. Entropy can decrease, rise, or stay constant in an open system when movement between the system and its surroundings is conceivable. Both of these outcomes leave open the option of a constant state.
Entropy:-
The quantity of atom-alignment combinations that can exist in a system is known as entropy. The quantity of energy that cannot be used for work can also be calculated from an object's entropy.
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Identify the reaction type for each unrelated, radical reaction as either initiation, propagation, or termination. Reaction A. A chlorine chlorine bond splits into two chlorine radicals. What type of reaction is reaction A
A is the initial reaction when a chlorine bond splits into two chlorine radicals.
What are radicals?In chemistry, a radical is an atom, molecule, or ion that has an unpaired valence electron.
The question is based on Radical Chain Reaction. And these reactions have three different phases: Initiation, Propagation and Termination.
Reaction A- Initiation
Reaction B- Termination
Reaction C- propagation
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G identify which substitution product is expected to be favored. explain. the product with retention of configuration is expected to predominate slightly, because the leaving group blocks the nucleophile. the inverted product is expected to predominate slightly, due to sn2 competition. the inverted product is expected to predominate slightly, as a result of ion pairs. the product with retention of configuration is expected to predominate slightly, because the leaving group attracts the nucleophile.
The substitution product that is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.
What is a substitution product?A substitution product is a product that is gotten from a reaction in which a group of reactants is replaced by another group in the reaction.
Therefore, the substitution product is supposed to be favoured. The product with retention of configuration is expected to predominate slightly because the leaving group blocks the nucleophile.
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Convert a speed of 88 m/s to its equivalent in cm/s.
pls help i don’t get it.
Answer:
8800 cm / s
Explanation:
There are 100 cm / m
so: 88 m/s * 100 cm / m = 8800 cm/s
( see how the 'm' cancels out and you are left with cm /s ?)
Eric pours some iced tea into a glass. When he puts the iced tea in the glass, the energy of the glass decreases. What must be true of the energy of the iced tea?
Iced tea's energy increases while the energy of the glass decreases.
What is energy?Energy is the capacity for doing work. It may exist in potential, kinetic, thermal, electrical, chemical, nuclear, or other forms
Iced tea's energy increases while the energy of the glass decreases because the ice is getting warmer so the glass is also getting warmer. meaning that the glass is decreasing in energy while the ice tea is increasing in energy.
Hence, iced tea's energy increases while the energy of the glass decreases.
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All of the following are anthropogenic greenhouse gases except Group of answer choices a. carbon dioxide. b. molecular oxygen. c. chlorofluorocarbons (CFCs). d. methane.
Answer:
c
Explanation:
its not a plant based gas
Which of the following is a ketone?
Answer:
b
Explanation:
b is the ketone because it is and that's a fact
Answer:
D
Explanation:
Ketones are a class of organic compounds that have an Oxygen double bonded to the middle of the main carbon chain.
Option A is not a ketone (despite having an Oxygen double bonded to the middle of the main carbon chain) because it has an adjacent single bonded Oxygen in the main carbon chain. This type of compound is classified as an "Ester".
Option B is not a ketone, but is instead classified as an aldehyde, a group of compounds with their Oxygen double bonded at the end of the main carbon chain.
Option C is not a ketone (despite having an Oxygen double bonded to the middle of the main carbon chain), but is instead classified as an Carboxylic Acid, because it has an adjacent single bonded Oxygen in the main carbon chain, and both of these pieces (with the single bonded O pointing outward) are at the end of the main carbon chain.
Option D is a ketone because it does have an Oxygen double bonded somewhere to the middle of main carbon chain, not at an end, and not with another Oxygen single bonded adjacently in the carbon chain. Specifically, this ketone is "2-pentanone" or "methyl propyl ketone"
There are two common oxides of copper; one is 80% copper and the other is 89% copper by weight. Calculate the formula and name each compound.
Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
Why both Cupric oxide (CuO) and cuprous oxide differ from one another?Both Cupric oxide (CuO) and cuprous oxide are different from one another because of the presence of number of copper atom. In one compound, copper is bonded with oxygen in 1:1 form whereas in the other compound, the copper is bonded with 2:1 form.
So we can conclude that Cupric oxide (CuO) and cuprous oxide (Cu2O) are the names of two oxides of copper.
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You are trying to determine how
many moles of lithium nitrate are in
256 mL of a 0.855 M solution.
How many liters is 256 mL?
Answer:
0,218 moles
Explanation:
I will first explain how many liters is 256ml, that is 0,256 l.
because the m stands for milli which is a factor of 1000 -> (256 ml / 1000 = 0,256 l)
To calculate the amount of moles you multiply the volume with the concentration. So 0,256l x 0,855M = 0,218 moles.
Answer: 0.256
Explanation:
The cutoff frequency for a certain
element is 1.22 x 1015 Hz. What is its
work function in eV?
Hint: 1 eV 1.60 x 10-19 J
[?] eV
The cutoff frequency for a certain element is 1.22 x 1015 Hz this is its
work function in eV that is Work done = 5.05 eV.
What is supposed through a piece function?Definition of labor function is the power this is wished for a particle to return back from the indoors of a medium and spoil via the surface —used particularly of the photoelectric and thermionic emission of electrons from metals paintings function.
Work function = hfh= planks constant.f= frequency.W = 6.626 10^-34 1.22* 10^15.W = 8.08 10^-19 / ( 1.6 10^-19)W = 5.05 eV.Read more about work:
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What does it mean when a solution is saturated?
O The container is full.
O No more solute can dissolve in solvent.
O The solute has turned into a solid.
O The solvent has turned into a solid.
Answer:
A solution in which the maximum amount of solvent has been dissolved. Any more solute added will sit as crystals on the bottom of the container.
Explanation:
I need the answer asap
Answer:
The energy will be added
Explanation:
Newton law of motion
Answer:
newtons law states that every body in the universe attracts every other body with a force which is directly proportional to the product of their masses and inversely proportional to square of the distance between their centers
Answer:
an object at rest tends to stay at rest
How many sublevels inn the second energy level?
There are two subshells that are s and p, which are present in the second energy level.
The energy level can be defined as the fixed distances from the nucleus of an atom where electrons may be found. Each energy level is divided into some Subshells. These subshells are known as s-subshell, p-subshell, d-subshell, and f-subshell. This subshell contains some orbitals, these orbitals are the place where there is the maximum probability of getting the electrons. In one orbital, a maximum of two electrons can be present.
Hence, there are two subshells in the second energy level.
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What is the answer to this question? I need help!!
Answer:
[tex]\fbox {C}[/tex]
Explanation:
By repeating the experiment with new amounts of each reactant, this conflict can be resolved as we can see the effect of a reactant on the final amount of product formed.
i hope someone can help me here please don't answer nonsense
Answer:
4560 torr
Explanation:
PV = K
4 x 1.5 = k
k = 6
V = k / p
V = 6 / 1
V = 6
atm to torr = 1 to 760
760 x 6 = 4560
Answer:
4560 Torr
Explanation:
Boyle's Law
[tex]\sf P_1 \cdot V_1=P_2 \cdot V_2[/tex]
where:
[tex]\sf V_1[/tex] = initial volume[tex]\sf V_2[/tex] = final volume[tex]\sf P_1[/tex] = initial pressure[tex]\sf P_2[/tex] = final pressureGiven:
[tex]\sf V_1[/tex] = 4 L[tex]\sf V_2[/tex] = 1 L[tex]\sf P_1[/tex] = 1.5 atmSubstituting the given values into the formula:
[tex]\implies \sf 1.5 \cdot 4=P_2 \cdot 1[/tex]
[tex]\implies \sf P_2=6\:atm[/tex]
To convert atm to Torr, multiply atm by 760:
[tex]\implies \sf P_2=6\cdot 760=4560\:Torr[/tex]
What is the volume of a
0.40 M Nal solution that contains
0.20 moles Nal in it?
Answer:
500ml or 0.5l
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
Answer: 0.5
Explanation:
The concentration is 0.40 M so there are 0.40 moles in 1 l of the solution.
0.40 moles -> 1 l
but we have to go to 0.20 moles, 0.40/2 = 0.20 moles but we have to divide the volume also by 2 that makes 0.5 liters.
What is the molar volume of a gas at standard temperature and pressure? 1.0 L2.4 L11.2 L22.4 L
The molar volume of a gas at standard temperature and pressure is 22.4L
Molar volume of a gas at STP
Because the particles in gases are compressible, they can be driven to enclose one another when subjected to high pressure. As a result, the volume of the gas is smaller and there is less free space. The temperature has an impact on gas volume as well. A gas expands as a result of its molecules moving more quickly when it is heated. The comparison of gas volumes must be done at standard temperature and pressure due to the variation in gas volume caused by variations in pressure and temperature. The definition of standard temperature and pressure (STP) is (273.15K) and 1atm pressure. The volume of one mole of a gas at STP is its molar volume. A mole (6.02 x 10^23 typical particles) of any gas takes up 22.4L at STP.
using ideal gas law:-
PV =nRT
P = 1.00atm
n = 1.00 mol
R = 0.0821 L atm/mol K
T = 273 K
V = ?
V = nRT/P
V = (1.00 x 0.081 x 273)/1.00
V = 22.4 L
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Figure 2 shows what happens to the electrons in the outer shells when a sodium atom reacts with a fluorine atom.
The dots (•) and crosses (x) represent electrons.
Describe, as fully as you can, what happens when sodium reacts with
fluorine to produce sodium fluoride.
Sodium reacts with fluorine to make a covalent bond between them. A covalent bond is formed when there is a mutual sharing of electrons between the two adjacent atoms.
Here, Sodium is metal and fluorine is non-metal. So, the bond between them may be an ionic bond, but as the Sodium has one valence electron and fluorine is highly electronegative. Sodium wants to lose electrons and fluorine wants to gain electrons to form a chemical bond. Therefore, the sodium donates its valence electron to fluorine, forms a cation, and fluorine accepts the electron and forms an anion and they distribute the difference in the charge between them.
So, we can say that when sodium and fluorine react to form sodium fluoride with a covalent bond.
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if earth has an oxidizing environment, what would you expect to happen to if left to sit over time?
If the earth is completely an oxidizing atmosphere, materials would ignite spontaneously when they are exposed to air.
What would happen if the earth is an oxidizing environment?Let us recall that oxidation has to do with an increase in oxidation number. If the earth is left as an oxidizing atmosphere without any attenuation, we can not have pure substances.
Secondly, materials would ignite spontaneously when they are exposed to the oxidizing atmosphere of the earth.
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