What are gravitational forces?
Answers
Answer:
Gravity, or gravitation, is a natural phenomenon by which all things with mass or energy—including planets, stars, galaxies, and even light—are brought toward one another. On Earth, gravity gives weight to physical objects, and the Moon's gravity causes the ocean tides.
Gravity, also called gravitation, in mechanics, the universal force of attraction acting between all matter. ... On Earth all bodies have a weight, or downward force of gravity, proportional to their mass, which Earth's mass exerts on them. Gravity is measured by the acceleration that it gives to freely falling objects
The gravitational force is a force that attracts any two objects with mass. We call the gravitational force attractive because it always tries to pull masses together, it never pushes them apart. In fact, every object, including you, is pulling on every other object in the entire universe!
Gravitational force is the force that attracts to objects with mass. ... This forces tries to pull masses together, that is why attractive in nature. For example: When ball is thrown upwards it always come downwards after a certain height because the ball is pulled or attracted by the Earth's gravitation la force.
¯\_(ツ)_/¯
Answer:
Good Question!!! No one has found the answer to that question.
Explanation:
Related Questions
When should a lab coat, safety goggles, and gloves be worn in the laboratory?
always, no exceptions
always, unless the teacher instructs otherwise
only when the teacher says to wear them
never in chemistry labs
Answers
Answer: the answer is a
Explanation:
you should always keep lab coat on when in lab
Answer:
its A. chemistry labs have a lot of things that can hurt you, even with just a few drops . its one of the most dangerous experiment types you do in science. even if your not doing an experiment but your in the room you should have on protection in case of a spill or something. it is always impotent to have safety gear on. even more so in chemistry
Can someone plz help me :(
Answers
Answer:
i Say B
Explanation:
because I don't know:)
Balance each equation by entering the correct coefficients.
NH3 +
O2 →
NO +
H2O
Answers
Balanced equation:
4 NH3 + 5 O2 = 4 NO + 6 H2O
Gold(III) forms an ionic compound with fluoride. How many atoms of each ion will bond to form an ionic compound?
Question 23 options:
1 gold(III), 1 fluoride
1 gold(III), 3 fluoride
2 gold(III), 3 fluoride
3 gold(III), 1 fluoride
Answers
This is because of the good has a 3+ charge and the fluorine has a 1- charge so they have to balance each other out
Answer:
1 gold(III), 3 fluoride
Explanation:
Derive an expression for the ratio of the amount (in mol) of ion x moved (to establish the nernst potential, vm, of the cell) to the initial amount (in mol) of ion x inside the cell.
Answers
This expression gives us the ratio of the amount of ion x moved to the initial amount of ion x inside the cell.
Amount of ion x moved / Initial amount of ion x = 1 - (Vcell / (Vm * n)) * Δc
To derive the expression for the ratio of the amount of ion x moved to the initial amount of ion x inside the cell, let's consider an electrochemical cell with two compartments, separated by a selectively permeable membrane.
Let:
n = number of moles of ion x initially present inside the cell
z = charge of ion x (in terms of elementary charges)
F = Faraday's constant (96,485 C/mol)
E = cell potential
Vm = Nernst potential
According to the Nernst equation, the Nernst potential (Vm) can be expressed as:
Vm = (RT / zF) ln([x]out / [x]in)
Where:
R = gas constant (8.314 J/(mol·K))
T = temperature (in Kelvin)
[x]out = concentration of ion x outside the cell
[x]in = concentration of ion x inside the cell
The cell potential (E) is related to the Nernst potential (Vm) by the equation:
E = Vm - (RT / zF) ln([x]out / [x]in)
Now, let's consider the change in the amount of ion x inside the cell. The amount of ion x moved can be expressed as the difference between the initial amount (n) and the final amount (n - Δn), where Δn is the change in the amount of ion x.
The change in the amount of ion x can be related to the change in concentration using the formula:
Δn = n - (Vcell / Vm) * Δc
Where:
Vcell = cell volume
Δc = change in concentration of ion x
Substituting the expression for Δn into the ratio expression, we get:
Amount of ion x moved / Initial amount of ion x = (n - (Vcell / Vm) * Δc) / n
Simplifying the expression, we have:
Amount of ion x moved / Initial amount of ion x = 1 - (Vcell / (Vm * n)) * Δc
This expression gives us the ratio of the amount of ion x moved to the initial amount of ion x inside the cell.
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What is the name of the molecule below?A. 1-butyneOB. 1-ethyneC. 2-butyneOD. 2-ethyneH-C=C–CH, CH3SUBMIT
Answers
In order to find a name of a Hydrocarbon molecule, we need to look for the main carbon chain first, this will be the chain with the highest number of carbon atoms, and in this molecule, we have 4 carbon atoms, therefore we have a 4 carbon molecule, the prefix for this type of molecule is But.
We also have a triple bond in the first carbon, the suffix for triple bonds is "yne"
Therefore, if we add all these informations, we will have 1-butyne, letter A
explain why the segment bc is signficantly shorter than segment de
Answers
Segments are an important concept in geometry, and they are defined as a portion of a line that has two endpoints. Without more information about the context in which these segments are located, we cannot definitively say why one is shorter than the other. However, we can use these examples to illustrate the importance of considering the endpoints and context when comparing segment lengths in geometry.
To start, we need to consider the endpoints of each segment. Segment BC has endpoints B and C, while segment DE has endpoints D and E. Next, we can look at the location of these endpoints in relation to each other.
One possibility is that segment DE is simply longer than segment BC because the distance between points D and E is greater than the distance between points B and C. However, this may not be the case since we are given no information about the relative positions of these points.
Another possibility is that the segments are located in different parts of a larger figure, and the surrounding geometry affects their lengths. For example, if segment DE is part of a triangle with a longer base than the triangle containing segment BC, then segment DE would be longer even if the endpoints D and E were closer together than the endpoints B and C.
Complete question - Explain why the segment bc is significantly shorter than segment de in a triangle?
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Rank the following molecules according to their predicted elution order on the GC (i.e., what do you expect to see if you analyzed a sample containing all three
Answers
The predicted elution order on a gas chromatography (GC) analysis for three molecules can be ranked based on their boiling points, with the molecule having the lowest boiling point eluting first.
In gas chromatography, the elution order of molecules is typically determined by their boiling points. Molecules with lower boiling points tend to elute first, followed by those with higher boiling points. Therefore, to rank the molecules in terms of their predicted elution order, one needs to consider their boiling points.
The molecule with the lowest boiling point is expected to elute first, followed by the molecule with the next higher boiling point, and so on. By comparing the boiling points of the three molecules in question, one can determine their predicted elution order on a gas chromatography analysis.
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Rank the following molecules according to their predicted elution order on the GC (i.e., what do you expect to see if you analyzed a sample containing all three?).
An electron has a mass
Answers
Which is a possible consequence of decreasing air quality resulting from global warming? drying out of fertile lands flooding of low-lying coastal areas melting of glaciers and polar ice caps decrease in population due to health threats The correct answer is decrease in population due to health threats.
Answers
Answer: A decrease in population due to health threats is a possible consequence of decreasing air quality resulting from global warming.
Explanation:
When average temperature of Earth keeps on increasing for a longer period of time due to greenhouse gases, increased level of carbon dioxide and other gases etc then it is called global warming.
As humans use oxygen to sustain which is present in the air. So, when there will occur decrease in air quality that results from global warming then it means more illness or diseases will be there.
Hence, people will tend to die more often because of decrease in the air quality their health is getting affected.
Thus, we can conclude that a decrease in population due to health threats is a possible consequence of decreasing air quality resulting from global warming.
Answer:
A decrease in population due to health threats is a possible consequence of decreasing air quality resulting from global warming.
Explanation:
Hope this helps.
A 5.0-gram sample of octane (C₂H₁g) is burned in a calorimeter containing 1200 grams of
water. The water temperature rises from 25°C to 41.5°C. Calculate the AH for this reaction in
kilocalories
Answers
The enthalpy change, ΔH, for the reaction, given that 5 grams of octane, C₈H₁₈ is burned in the calorimeter containing 1200 g of water is 450 Kcal/mol
How do i determine the change in enthalpy?First, we shall determine the mole of 5 grams of octane, C₈H₁₈. Details below:
Mass of C₈H₁₈ = 5 grams Molar mass of C₈H₁₈ = 114 g/mol Mole of C₈H₁₈ =?Mole = mass / molar mass
Mole of C₈H₁₈ = 5 / 114
Mole of C₈H₁₈ = 0.044 mole
Next, we shall obtain the heat absorbed by the water. Details below:
Mass of water (M) = 1200 gInitial temperature of water (T₁) = 25 °CFinal temperature of water (T₂) = 41.5 °CChange in temperature of water (ΔT) = 41.5 - 25 = 16.5 °CSpecific heat capacity of water (C) = 1 Cal/gºC Heat (Q) =?Q = MCΔT
Q = 1200 × 1 × 16.5
Q = 19800 cal
Finally, we shall determine the enthalpy change, ΔH, for the reaction. Details below:
Mole of C₈H₁₈ (n) = 0.044 moleHeat involved (Q) = 19800 cal = 19800 / 1000 = 19.8 KcalEnthalpy change (ΔH) =?ΔH = Q / n
ΔH = 19.8 / 0.044
ΔH = 450 Kcal/mol
Thus, the enthalpy change, ΔH for the reaction is 450 Kcal/mol
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when solid sodium hydroxide dissolves in water, the δh for the solution process is −44.4 kj/mol. if a 13.9 g sample of naoh dissolves in 250.0 g of water in a coffee-cup calorimeter initially at 23.0 °c. what is the final temperature of the solution? assume that the solution has the same specific heat as liquid water, i.e., 4.18 j/g·k.
Answers
The final temperature of solid sodium hydroxide dissolves in water is 355.88 kelvin.
A given amount of matter's heat capacity is the amount of energy needed to raise its temperature by one degree Celsius. While the heat capacity of 1 mole of a substance is known as its molar heat capacity, the heat capacity of 1 gram of a substance is referred to as its specific heat capacity (or specific heat). The equation q = mcT, where m is the mass of the sample, c is the specific heat, and T is the temperature change, can be used to determine how much heat is gained or lost by a sample (q).
Given
Mass of NaOH = 13.9 g
Mass of water = 250 gram
Specific heat of the solution = 4.18 j/g·k
Initial temperature = 23.0 °c or 296 kelvin
Heat evolved in process = −44.4 kj/mol
Q = mc (T₂ - T₁)
−44400 j/mol = 263.9 x 4.18 j/g·k x (T₂ - 296k)
T₂ = 355.88 k
Hence, final temperature of NaOH solution is 355.88 kelvin.
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What caused the formation of Mammoth Caves?
Answers
The Ideal Gas Law is as follows: PV = nRT.
Rearrange the equation for each variable.
P =
V=
n =
R=
T =
Answers
Answer:
p=nRT/V
v=nRT/P
n=PV/RT
t=PV/nR
The manufacturer of an aerosol deodorant packaged in a 300 mL container plans to produce a container of the same size that will hold twice as much gas. How will the pressure of the gas in the new product compare with that of the gas in the original container?
Answers
Answer: It will get higher
Explanation: it’ll get higher because the pressure will increase
a block of mass m is sliding with an initial speed vi along a horizontal surface with negligible friction. a constant force of magnitude fa is exerted on the object at an upward angle of 60∘ from the horizontal, causing the object to speed up. if the block remains in contact with the floor, what is the change in the block’s kinetic energy as it moves a horizontal distance δx ?
Answers
The change in kinetic energy is equal to the force of magnitude fa multiplied by the horizontal distance δx, which is equal to faδx.
What is kinetic energy?Kinetic energy is the energy possessed by an object due to its motion. It is a form of energy that is transferred during an impact or collision. Kinetic energy is calculated by multiplying the mass of the object times the square of its velocity. The faster an object is moving, the greater its kinetic energy. Kinetic energy can be converted into other forms of energy, such as heat or sound.
This is because the force is acting in the direction of the displacement, so the work done by the force is equal to the force multiplied by the displacement in the direction of the force. As the mass m is constant, the change in kinetic energy is equal to faδx/m.
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A 20.0 mL of 0.27 M solution of the salt NaA has a pH of 8.70.
a) Calculate the pk, value of the acid HA.
(Correct to 3 sig. fig)
b) Calculate the pH of a solution containing 0.3 M HA and 0.1 M NaA.
(Correct to 3 sig. fig)
Thanks!!
Answers
Answer:
a) 3.969
b) 3.487
Explanation:
Given data:
m = 0.27 M
pH = 8.7
a) Calculate PKa of acid HA
pH value = 1/2 ( Pkw + Pka + log C )
8.7 * 2 = 14 + log C + Pka
17.4 = 14 + log ( 0.27 ) + Pka
∴Pka = 17.4 - 14.5686 = 3.9686 ≈ 3.969
b) Calculate the pH of solution
pH = pKa + log ( salt / acid )
= 3.9686 + log ( 0.1 / 0.3 )
= 3.487
how many moles of CO2 are in 66.0g of CO2
Answers
Answer:; 66 g is about 3/2 the value of the molar mass of CO2. It is reasonable that the sample contains 3/2 (1.5) mol.
Explanation:
Of the following choices which would be the best option to be a
recrystallization solvent for sodium benzoate
Ethanol, hexane, benzene, or water?
Answers
The best option to be a recrystallization solvent for sodium benzoate is water. Recrystallization is a purification technique that involves dissolving an impure sample in a solvent and then allowing the solute to slowly crystallize out of the solution under controlled conditions. The pure crystals can be separated from the remaining liquid through filtration.
The most effective solvent for recrystallization is one in which the compound is only slightly soluble at low temperatures but very soluble at high temperatures. By dissolving the compound in a hot solvent and then allowing the solvent to cool, the compound will slowly crystallize out of the solution while any impurities remain dissolved. These impurities are then removed by filtration.
Benzene is no longer used as a solvent because of its toxicity. Ethanol is not the best solvent for recrystallizing sodium benzoate, as it does not have a large enough temperature range to allow for sufficient crystallization and purity. Hexane is non-polar, whereas sodium benzoate is polar, making it ineffective as a solvent for recrystallization. Therefore, the best option to be a recrystallization solvent for sodium benzoate is water.
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How many moles of silver chloride will be produced if 2 moles of silver is allowed to react with an
unlimited amount of chlorine?
Answers
When two moles of silver are allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride (AgCl) is produced.
When a chemical reaction takes place, it is important to know the amount of products that will be formed from the reactants used. In order to do this, we need to know the balanced chemical equation for the reaction and the number of moles of reactants used.The balanced chemical equation for the reaction between silver and chlorine gas is given by:
2Ag + Cl2 → 2AgCl
Here, we can see that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.Since an unlimited amount of chlorine is allowed to react with 2 moles of silver, the number of moles of silver chloride produced will be equal to the number of moles of silver reacted. Hence, 2 moles of silver chloride will be produced.Therefore, we can say that if 2 moles of silver is allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride will be produced. This is because the balanced chemical equation shows that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.
When a chemical reaction takes place, it is important to know the amount of products that will be formed from the reactants used. In this case, we have determined that if 2 moles of silver is allowed to react with an unlimited amount of chlorine, 2 moles of silver chloride will be produced. This is because the balanced chemical equation shows that 2 moles of silver react with 1 mole of chlorine gas to produce 2 moles of silver chloride.
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at a given temperature, the vapor pressures of hexane and toluene are 183 mm hg and 59.2 mm hg, respectively. calculate the total vapor pressure over a solution of hexane and toluene. the mole fraction of hexane (x hexane) is 0.520.
Answers
Answer:
total of 131 millimeters of mercury
Explanation:
So we can calculate the total vapour pressure using the equation. The total pressure p equals x a where x is the mole fraction of a and the p a is the partial pressure of a plus x b being the mule fraction of b and the partial pressure of b we can get the mule fraction of a and B because 1 will equal x, a plus x b and a is hexane and b is octane, and so the mole fraction of hexane is 1.580, and so we can set this up to solve. As x b will equal 1 minus x a which is equal to 1 minus .58, which is equal to .4 2 point now, because we have all our numbers, we can put them into our full equation. So we have. The pressure is equal to .58 times. The pressure of our hexane, which is greater than 183, and this has added 2.42 and the pressure of our octane, which is 59.2, and so we get a total of 131 millimeters of mercury. As our total vapour pressure.
answer is in th epic
Carbon and silicon are located in group 14 (4A) on the periodic table. How are carbon and silicon different?
A Carbon has an atomic mass of 6, and silicon has an atomic mass of 14.
B Carbon has 2 shells of electrons, and silicon has 3 shells of electrons.
C Carbon has 12 electrons, and silicon has 28 electrons.
D Carbon has 14 protons, and silicon has 28 protons.
Answers
Carbon and silicon are located in group 14 (4A) on the periodic table but are different in that Carbon have 2 shells of electrons, and silicon has 3 shells of electrons.
The correct option is B.
What are periods and groups in the Periodic Table?The Periodic Table is a table that arranges the elements in the order of increasing atomic number.
The Periodic Table is divided into Periods and Groups.
The periods in the periodic table are the horizontal rows found in the periodic table. Elements in the same period have the same number of electron shells.
The groups in the periodic table are the vertical colums> Elements in the same group have the same number of outermost electrons.
Carbon and silicon belong to the same group but different periods in the periodic table.
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To view the daily appointments, you would first click the BLANK icon
A) Appts
B) Select Patient
C) New File
D) Reports
Answers
How many grams of copper nitrate can be produced from 0.78 grams of silver nitrate and excess copper?
Answers
Answer:
Explanation:
This link will take you to a work sheet that I think might help.
The diagram below shows the different phase transitions that occur in matter.
Solid
3
Liquid
16
Gas
Which arrow represents the transition in which dew is formed?
1
O2
4
6
Answers
Answer:
C.4
Explanation:
The arrow 4 represents the transition in which dew is formed.
What is Dew?This is formed as a result of condensation which takes place in the morning or evening and is usually seen on exposed surfaces as water droplets.
The air particles in the form of vapor under low temperatures results in the formation of the substance. The arrow 4 thereby depicts it and makes it the most appropriate choice.,
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Question 1 (5 points)
Balance the following equation. Remember to put 1 in spaces that you would normally leave blank.
Answers
Answer:
Coefficient of 1 for all except Cl2, which has a coefficient of 3.
Explanation:
The left side of the equation has 6 chlorine atoms, so the right side also needs 6 chlorine atoms.
Select all the intermolecular forces associated with solid NaCl salt.
H-bonding
Ion-dipole
London Disperson
Dipole-dipole
Answers
The intermolecular forces associated with solid NaCl salt are Ion-dipole; London Dispersion; Dipole-dipole.
Ion-dipole forces: NaCl is a ionic compound, consisting of positively charged Na+ ions and negatively charged Cl- ions. The ion-dipole force results from the attraction between the positive ion and the negatively charged end of the neighboring molecule.Dipole-dipole forces: The NaCl molecule has a polar nature due to the difference in electronegativity between the sodium and chlorine atoms, creating a permanent dipole. The interaction between the positive end of one molecule and the negative end of another molecule is known as a dipole-dipole interaction.London Dispersion forces: These forces result from the fluctuation of electron clouds in the atoms and molecules. The fluctuations create temporary dipoles, which attract the neighboring molecules.To know more about NaCl please refer:
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What are the charges on ions of Group 1A, Group 3A (aluminum), and Group 5A?
Answers
Answer:
Group 1A: 1+
Group 3A: 3+
Group 5A: 3+ or 5+
Explanation:
If an object is travelling 25.0 meters/second, how far will it travel in 45 minutes?
Answers
\(\\ \rm\longmapsto Distance=Speed(Time)\)
\(\\ \rm\longmapsto Distance=25(2700)\)
\(\\ \rm\longmapsto Distance=67500m\)
The object travelling at 25 m/s, will travel a distance of 67500 m in 45 mins.
We'll begin by converting 45 mins to seconds. This can be obtained as follow:1 min = 60 s
Therefore,
45 mins = 45 × 60
45 mins = 2700 sFinally, we shall determine the distance travelled by the object in 2700 s (i.e 45 mins). This can be obtained as follow:Time = 2700
Speed = 25 m/s
Distance =?Distance = speed × time
Distance = 25 × 2700
Distance = 67500 mTherefore, the object will cover a distance of 67500 m in 2700 s (i.e 45 mins)
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please answer these two questions quickly, i wasn’t here when we learnt this.
Answers
Each atom on both sides of a balanced chemical equation has the same number and type. A balanced equation's coefficients must have the simplest whole number ratio. In chemical processes, mass is always preserved.
What is an example of a balanced chemical equation?Consider the following reaction: 2Mg(s)+O2(g)2MgO(g), Two atoms of magnesium and oxygen are present on both the reactant and product sides of this reaction. As a result of obeying the rule of conservation of mass, the chemical reaction is a balanced chemical equation.
A balanced chemical equation is one in which the number of each type of atom on both sides of the equation is equal. Subscripts are elements in the chemical formulae of reactants and products that denote the number of atoms of the previous element.
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