Answer:
According to my search, the answer is this.
Black holes come in several different sizes which are defined by their mass. Small black holes are usually the result of a relatively short and violent collapse of a star.
Explanation:
It only has mass. The amount of matter that has fallen into the black hole determines its mass. The more mass/matter a singularity has the larger its event horizon. So, the greater the black hole's mass the larger it is.
Answer: Black holes come in several different sizes which are defined by their mass. Small black holes are usually the result of a relatively short and violent collapse of a star.
Explanation:
What factor would speed up a chemical reaction
Answer:
Adding Catalyst can Speed up a Chemical reaction
Answer: catalyst
Explanation:
a catalyst is a substance that helps speed up chemical reactions.
hope this helped! ♡
What is the substance that is dissolved in a solution?
A)solvent
B)solute
C) mixture
D) electrolyte
Answer:
solute dissolves in a solution
Answer:
solvent
Explanation:
because solvent are liquid that disolves
Two groups of students tested to compare their speed working math problems. Each group was given the same problems. One group used calculators and the other group computed without calculators.
Independent variable:
dependent variable:
controlled variable:
Answer:
The independent variable is the calculator
The dependent variable is the speed of solving the problem.
The constant variable is the same set of problems that were assigned to two groups of students.
The dependent variable is the one that is being tested by experimentation. The dependent variable depends on the independent variable.
The independent variable can b changed by the experimenter whereas the constant variable remains unchanged throughout the experiment.
Answer:
Controlled Variable: The same math problems
Dependent Variable: The amount of time taken to answer
Independent Variable: One group using calculators and the other group not using calculators.
Explanation:
The dependent variable is the variable being tested and the independent variable is what is being changed. The controlled is what is staying the same.
Based on the graph what is the approximate half-life of the reaction shown below
What are two benefits of using tides for energy?Good explanation=Brainliest.
Answer:
Advantages of tidal energyRenewable.
Tidal energy is a renewable source of energy, which means the energy doesn’t deplete as it is used. …
Zero carbon emissions. In addition to being a renewable energy source, tidal power stations do not emit greenhouse gasses during electricity generation. … Predictable. … High power output.
Explanation:
If 15.0 mL of 12.0 M H3PO4 reacts with 100.0 mL of 3.50 M of Ba(OH)2 , which substances is the limiting reactant?
2 H3PO4 + 3 Ba(OH)2 -> 6 H2O + BA3 ( PO4 )2
Use the formula stated below
[tex]\boxed{\sf Molarity=\dfrac{Moles\:of\:solute}{Volume\:in\:L}}[/tex]
So
#H_3PO_4
No of moles[tex]\\ \tt\Rrightarrow n=0.015(12)=0.18moles[/tex]
#Ba(OH)_2
[tex]\\ \tt\Rrightarrow n=0.1(3.5)=0.35mol[/tex]
Barium hydroxide is moreHence H_3PO_4 is the limiting reagent
Answer:
hope it's helpful to you
I need help please. Thanks
Answer:
Battery
Explanation:
The battery supplies the electricity needed for the circuit to work.
Which process can be used to power a home? solar thermal energy neither solar thermal energy nor solar electric energy both solar thermal energy and solar electric energy solar electric energyWhich process can be used to power a home? solar thermal energy neither solar thermal energy nor solar electric energy both solar thermal energy and solar electric energy solar electric energy
Answer:
solar electric energy
Explanation:
k12
Draw the alkyl bromide(s) you would use in a malonic ester synthesis of ethyl 2-methylbutanoate
The structure of the alkyl bromides used in a malonic ester synthesis of ethyl 2-methyl-4-pentenoate are as drawn in the attached image.
Ethyl 2-methyl-4-pentenoate by Malonic ester synthesis.The malonic ester synthesis is a chemical reaction characterized by the alkylation of diethyl malonate or a similar ester of malonic acid at the carbon alpha (directly adjacent) to both carbonyl groups, and subsequently converted to a substituted acetic acid.
Hence, it follows from the structure of Ethyl 2-methyl-4-pentenoate that the alkyl bromides used are Ethyl bromide and methyl bromide.
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Alkyl bromide is a compound that contains a halogen atom in alkane based structure. The structure of the alkyl bromides is attached in the image below.
What is Malonic ester synthesis?Malonic ester synthesis is the alkylation of an ester of malonic acid or diethyl malonate at alpha carbon and is converted to substituted acetic acid.
In malonic ester synthesis of ethyl 2-methyl butanoate, ethyl bromide and methyl bromide are the alkyl bromides used and their images are attached below.
Therefore, alkyl bromides used in the synthesis are ethyl bromide and methyl bromide.
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Complete the curved arrow mechanism for the reaction of 4-methylpentanenitrile and lialh4, followed by the addition of acid to give the major product
The curved arrow mechanism for the reaction as described is as represented in the attached image.
Nitrile reduction by LiAlH4Nitriles, upon reaction with LiAlH4 can be converted to 1° amines.
Opon occurrence of this reaction, the hydride nucleophile attacks the electrophilic carbon in the nitrile to form an imine anion. Once stabilized by a Lewis acid-base complexation the imine salt can accept a second hydride to form a dianion.
On this note, the nitrile reduction of 4-methyl pentanenitrile and lialh4, followed by the addition of acid to give the major product is as represented in the attached image.
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Drag each label to the correct location.
Determine whether each example represents continental drift or seafloor spreading.
oceanic ridges
concept of Pangaea
oceanic plates sliding
under continental crust
magma pushing
two plates apart
Continental Drift
Seafloor Spreading
The correct location of the given object on represents continental drift or seafloor spreading.
Continental drift: magma pushing two plates apart and concept of PangaeaSeafloor spreading: oceanic ridges and oceanic plates sliding under continental crustWhat is continental drift?The scientist Alfred Wegener is most closely connected with the concept of continental drift. Wegener wrote a paper outlining his notion that the continents were “drifting” across the Earth, occasionally crashing through oceans and into one another, in the early 20th century.
The seafloor spreading is the increase of seawater covering the land area. The spreading of seawater is decreasing the land area.
Thus, the correct location is:
Continental drift: magma pushing two plates apart and concept of PangaeaSeafloor spreading: oceanic ridges and oceanic plates sliding under continental crust.To learn more about continental drift, refer to the below link:
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what are the advantages and diadvantages of preparing a standard solution?
Answer:
advantages:
. The error due to weighing the solute can be minimised by using concentrated stock solution that requires large quantities of solute. 2. We can prepare working standards of different concentrations by diluting the stock solution which is more efficient since consistency is maintained
3. Some of the concentrated solutions are more stable and are less likely to support microbial growth than working standards used in the experiments.
If the equation: FeCl3+O2-->Fe2O3+Cl2, how many moles of chlorine gas can be produced if 4 moles of FeCl3 react with 4 moles of O2?
Answer:
6 moles of Cl2
Explanation:
First, the equation has to be balanced, which makes it 4 FeCl3 + 3 O2 --> 2 Fe2O3 + 6 Cl2
Using this information, we can see that one mole of O2 will not be present in the reaction. Since four moles of FeCl3 are needed to react in the equation, which would produce six moles of Cl2, and only four moles of FeCl3 are present, six moles of Cl2 would be produced.
A reaction that is spontaneous at low temperature can become non spontaneous at high temperature if δh is\
Answer:
Reaction
Explanation:
A reaction that is spontaneous at low temperature
Of the following acids, determine a. The strongest acid b. The acid that produces the lowest concentration of hydronium ions per mole of acid
Answer:
The bond strength of an acid generally depends on the size of the 'A' atom: the smaller the 'A' atom, the stronger the H-A bond. When going down a row in the Periodic Table (see figure below), the atoms get larger so the strength of the bonds get weaker, which means the acids get stronger.
Explanation:
The acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
What are weak and strong acids?Strong acids are completely dissociated into a solution.
Examples of strong acids are Hydrochloric acid, sulfuric acid, nitric acid, etc.
Weak acids are those that do not completely dissociate in a solution.
Examples are formic acid, acetic acid, nitrous acid, etc.
Thus, the acid that is strongest of the following is HNO₃ and the acid that produces the lowest concentration of hydronium ions per mole of acid is HF.
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On all aerosol cans you see a warning that tells you to keep the can
away from heat because of the danger of explosion. What is the
potential volume of the gas contained in a 500.0 mL can at 25°C if it
were heated to 54°C. In other words if the can could expand to allow
the gas to take up a greater volume, what would be the new volume of
the gas when heated as previously described?
Gas laws show the relationship between tempertaure, pressure, volume, volume and number of moles. The new volume of the gas is 549 mL.
What is Charles law?Charles law states that, the volume of a given mass of gas is directly proportional to its temperature at constant pressure .
Given that;
V1 = 500.0 mL
T1 = 25°C or 298 K
V2 = ?
T2 = 54°C + 273 = 327 K
Since;
V1/T1 = V2/T2
V1T2 = V2T1
V2 = V1T2/T1
V2= 500.0 mL * 327 K/298 K
V2 = 549 mL
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A neutral cloth and a neutral rod are rubbed together. Electrons are transferred from the rod to the cloth. What will be the final charge on the cloth?
Answer: The net charge on the cloth with be negative.
Explanation:
Because electrons are being transferred from the neutral rod to the neutral rod to the neutral cloth, the cloth will become negative due to the excess electrons. (The rod will also become positively charged, but that’s beyond the scope of the question.)
When a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.
What is transfer of charge from material ?Whenever electrons are transferred between objects, neutral matter becomes charged. For example, when atoms lose or gain electrons they become charged particles called ions. Three ways electrons can be transferred in a material that are conduction, friction, and polarization.
How does the charge transfer from rod to the cloth ?Rubbing a neutral rod with a neutral cloth also transfer charge from both the material. We know that a metal rod is a conductor of electricity whereas the cloth is an insulator that does not conduct electricity. When both the rod and cloth is rubbed, electrons are transferred due to friction on the material. Electrons are always negatively charged. As the rod and cloth is rubbed, the electrons flow from the rod to the cloth thereby making the rod as positively charged and the cloth as negatively charged.
Thus, when a neutral cloth and a neutral rod are rubbed together then the final charge on the cloth is negative.
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what is not a molecule
Answer:
Single atoms of elements are not molecules.
Explanation:
A single oxygen, O, is not a molecule. When oxygen bonds to itself (e.g., O2, O3) or to another element (e.g., carbon dioxide or CO2), molecules are formed
Typical household bleach has a ph of 13. what is the h3o concentration in household bleach? round to the nearest hundredth. × 10n m n =
Typical household bleach has a value of pH of 13, so the concentration of H₃O⁺ in household bleach is 1 × 10⁻¹³ M.
What is pH?pH of any solution is defined as the negative logarithm of the concentration of H⁺ ion presnt in the solution.
pH = -log[H⁺]
From this equation we can calculate the concentration of H⁺ ion by removing logarithm as:
[H⁺] = [tex]10^{-pH}[/tex]
Given value of pH = 13
[H⁺] = 10⁻¹³ M
Hence, required concentration is 1 × 10⁻¹³ M.
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Answer:
1st blank is 1.00
2nd blank is -13
Explanation:
Solutions of monosodium phosphate and disodium phosphate are combined in equal volume to produce a buffer. Identify the combination that will produce the buffer with the highest buffer capacity
Answer: 0.1M NaH2PO4 & 0.1M Na2HPO4
Explanation:
Why would you argue this is the best energy source to use?
Answer:
really its tought or we can say confusing
°__°
Which can be directly linked to a reduction in the surface area available for gas exchange in human lungs
Emphysema is directly linked to a reduction in the surface area available for gas exchange in the human lungs.
What is Emphysema?Emphysema is a lung disease that causes shortness of breath.
The air sacs are damaged in this disease.
The inner walls of the air sacs weaken and rupture, resulting in a larger number of smaller air spaces.
Smoking is the primary cause of Emphysema
Thus, Emphysema is directly linked to a reduction in the surface area available for gas exchange in the human lungs.
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You’re sitting at a car race and the cars sound differently when they approach as opposed to when they are moving away. Why might this be true? Explain in detail.
Answer:
I have no clue this qestion is kinda stumping but it a really good question it got me thinking but i don't know if there is a right answer
Explanation:
I don't know
Name an element in the third period (row) of the periodic table with a total of 4 3p electrons
Answer:
sulfur
Explanation:
sulfur has 4p electrons.
phosphorus has 3p electrons.
The question is asking which one has 4
The element in the third period (row) of the periodic table with a total of 4 3p electrons is sulfur (S).
What is sulfur?Sulfur is a chemical element that is present in the third of the periodic table.
Its atomic number is 16.
The electronic configuration of sulfur is [tex]\rm [Ne]\; 3S_2\; 3P_4[/tex]
So, sulfur contains 4 electrons in its last orbital.
Thus, the element in the third period (row) of the periodic table with a total of 4 3p electrons is sulfur (S).
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For 480. 0 mL m L of pure water, calculate the initial pH p H and the final pH p H after adding 2. 0×10−2 mol m o l of HCl H C l
Given that the volume of the pure water is 480 mL and the mole of HCl added to the water is 2×10¯² mole. Therefore, the Initial and final pH of the water are:
1. The initial pH of the pure water is 7
2. The final pH of the water is 1.38
What is pH ?This is simply a measure of the acidity / alkalinity of a solution.
The pH measures the hydrogen ion concentration while the pOH measures the hydroxide ion concentration
pH scaleThe pH scale is a scale that gives an understanding of the variation of the acidity / alkalinity of a solution.
The scale ranges from 0 to 14 indicating:
0 to 6 indicates acid 7 indicates neutral (pure water) 8 to 14 indicate basicHow to determine the molarity Volume = 480 mL = 480 / 1000 = 0.48 L Mole of HCl = 2×10¯² mole Molarity =?Molarity = mole / Volume
Molarity = 2×10¯² / 0.48
Molarity = 4.17×10¯² M
Dissociation equationHCl(aq) —> H⁺(aq) + Cl¯(aq)
From the balanced equation above,
1 mole of HCl contains 1 mole of H⁺
Therefore,
4.17×10¯² M HCl will also contain 4.17×10¯² M H⁺
How to determine the pH Hydrogen ion concentration [H⁺] = 4.17×10¯² MpH =?pH = –Log H⁺
pH = –Log 4.17×10¯²
pH = 1.38
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Compare and contrastthe properties of the individual elements that combine to make salt with the compound salt
Answer:
I believe is the correct answer
Explanation:
NaCl made,2(NaCl)or2NaCl,Na2Cl,NaCl2 all represent compounds
what is the barometric trend of the weather data?
Answer:
the change of atmospheric pressure during the last few (generally three) hours before a regular observation.
Explanation:
Even small changes in barometric pressure can greatly impact the weather. The Weather Trend directional arrow icon, included on many AcuRite weather station products, will show one of the following three barometric pressure trend directions, indicating potential future weather conditions.
please help there are 3 answers brainlies is included with the best answer.
SUMMATIVE FOSSILS/FOSSIL RECORD/HISTORY OF LIFE ON EARTH
FOSSILS CAN BE CATEGORIZED INTO 3 MAJOR TYPES. THEY ARE:
REPLACEMENT
METAMORPHIC
TRACE
SEDIMENTARY
IMPRESSION
Answer:
Your answers would be:
-impression fossils
-trace fossils
-replacement fossils
Explanation:
Have a great rest of your day
#TheWizzer
Answer:
The are id-k- I dont know much on fossials. But did you know that thunder is lighting. I say this because thunder is just the noise lighting makes. We see the light firts because light travels faster than sound.
Explanation:
Hope This Helps
Have A Great Day
~Zero~
a system with 1 mole of an ideal gas changes its volume from 10 L to 1 L by isothermal compressoin. What is the change in entropy of the system
Answer:
ΔS=2.303 n Rlog(
V
1
V
2
)
=2.303×10×8.314log(
10
100
)=191.47 JK
−1
Thus ΔS=191.47JK
−1
Explanation:
_____is the rate of change of displacement
Answer:
Velocity
Explanation:
The rate of change of displacement is velocity.
Answer:
Velocity
Explanation:
The rate of change of displacement with time is called velocity.
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