Answers
The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa
Pressure is defined as the force per unit area. It can be represented using dimensional analysis by considering the fundamental units of force and area. Force is represented by the fundamental unit of mass (kg) multiplied by the fundamental unit of acceleration (m/s²). Therefore, the dimension of force is [kg·m/s²]. Area is represented by the fundamental unit of length (m) squared. Therefore, the dimension of area is [m²]. To determine the dimension of pressure, we divide the dimension of force by the dimension of area: [Pressure] = [Force] / [Area] = [kg·m/s²] / [m²]
Simplifying the expression, we can cancel out the common unit of length:
[Pressure] = [kg/s²·m] The unit commonly used to measure pressure is the Pascal (Pa), which is equivalent to a force of 1 Newton per square meter: [Pressure] = 1 [kg/s²·m] = 1 Pa Therefore, the dimension of pressure is [kg/s²·m] and its unit is the Pascal (Pa).
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Related Questions
Start four fundamental laws of chemical Combinations and the scientist that stated each below (1) Law of Conseriation of mass (2) Law of Definite proporsionis (3)Law of multiple proportions (4)Law of reciprocal propertion
Answers
Explanation:
Law of conservation of matter/mass
the law of conservation of mass states that matter cannot be created nor destroyed but can be changed from one form to another.
by Antoine Lavoisier
Law of multiple proportions
the law of multiple proportions states that if two elements, A and B combine to form more than one chemical compound, the various masses of element A, which combine separately with a fixed mass of the other element B are in simple multiple ratios.
by chemist John Dalton
Law of reciprocal proportion
the law of reciprocal proportion states that the masses of several elements A, B, C
which combine separately with a fixed mass of another element D are the same as or simple multiples of, the masses in which A, B, and C themselves combine.
by Jeremias Richter
Law of definite proportions
the law of definite proportions states that all pure samples of a particular chemical combined contain similar elements combined in the same proportion by mass.
by Joseph Proust
I'm having difficult to draw the resonance structure of this molecule. Someone can help me, please
Answers
he Ostwald process is used commercially to produce nitric acid, which is, in turn, used in many modern chemical processes. In the first step of the Ostwald process, ammonia is reacted with oxygen gas to produce nitric oxide and water. What is the maximum mass of H2O that can be produced by combining 93.3 g of each reactant?
Answers
Answer:
148.2 g of H20
Explanation:
Equation of reaction: 4NH3 + 5O2 ---> 4NO + 6H20
From the equation above, 4 moles of ammonia reacts with 5 moles of oxygen gas to produce 6 moles water.
Molar mass of NH3 = 17 g/mol;
Molar mass of O2= 32 g/mol;
Molar mass of H2O = 18 g/mol
First, we determine the limiting reactant:
4*17 g of NH3 reacts with 5*32 g of O2
Mass Ratio = 68 : 160
Therefore, NH3 is the limiting reactant.
68 g of NH3 reacts to produce 6* 18 g of H20 = 108 g of H2O
93.3 g of NH3 will react to produce (93.3 * 108)/68 g of H20 = 148.2 g of H2O
Therefore, the maximum amount of H2O produced = 148.2 g
what is an example of conduction, raditaon convection
Answers
Answer:
convection could be a pot on a stove, radiation could be the sun and heat waves, and conduction could be a cup with coffee.
Explanation:
Conduction occurs when two objects are in direct contact with each other.
Convection is the transfer of heat through liquids and gases. Convection occurs above a hot surface because hot air expands and rises and is replaced by cooler, denser air.
Radiate energy is given off by a hot object and directly absorbed by another cooler object. This cause the cooler object to get warmer. Radiation can occur even if no air is present.
What product(s) would be formed when these are the reactants? C5H12 + O2 (limited)
Answers
Answer:
Carbon dioxide and water I believe because it is a combustion reaction
Solar and wind energy are both intermittent resources that cannot be relied upon for a constant stream of energy production. Explain why developing better ways to store energy is an important part of making these energy sources more practical to use.
Answers
By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers.
By removing the need to build additional transmission lines and equipment, energy storage may reduce costs for utilities and their customers. Energy storage's inherent ability to offer backup power in the event of grid failure is a feature that both residential consumers and commercial owners find highly desirable.
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A piece of metal is heated to 250 degrees then placed in a bucket of water with an initial temperature of 15 degrees. After 10 minutes, the system reaches a point of thermal equilibrium. The water is now 22 degrees. Which of the following is the most likely temperature of the piece of metal?
Answers
Answer: 22 degrees
Explanation:
Most of the information in this question is put there to throw you off- the only important piece of information here is the final temperature of the water.
In a system of say 2, like in this example, whichever object has more energy in the form of heat will transfer that heat to the object with lesser heat if there is an available path to transfer heat between them. Once the two objects are at the same temperature, however, heat can not be transferred from one to another since neither object has more heat than the other to transfer- this is thermal equilibrium.
This question tells us that the system is at thermal equilibrium- when both objects are at the same temperature. Given the temperature of one object, the water, we then know the other object, the metal is the same temperature.
a student proposes the following lewis structure for the dinitrogen monoxide molecule (N2O). assign a formal charge to each atom in the student's lewis structure.
Answers
Both the resonance structure and the formal charge of nitrous oxide are zero.
Where can I find the official charge?Subtract the amount of non-bonding electrons and half the number of bonded electrons from the total number of valence electrons in an atom to determine its formal charge. The nitrogen atom's formal charge in NO2 is FC=5212(6)FC=0.
The purpose of formal charge calculationKeeping track of the electrons is crucial for determining and predicting the reactivity, as is knowing the formal charge on each individual atom in a structure. When compared to an isolated neutral atom, the number of electrons that are attached to an atom in a molecule determines its formal charge.
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Milk of magnesia, which is an aqueous suspension of magnesium hydroxide, is used as an antacid in the reaction below. How many molecules of HCl would have to be present to form 34.52 g of MgCl₂?
Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)
Answers
Approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.
To determine the number of molecules of HCl required to form 34.52 g of MgCl₂, we need to use the molar mass and stoichiometry of the balanced equation:
Mg(OH)₂(s) + 2 HCl(aq) → 2 H₂O(l) + MgCl₂(aq)
The molar mass of MgCl₂ is 95.21 g/mol.
First, we need to calculate the number of moles of MgCl₂ formed:
Moles of MgCl₂ = mass of MgCl₂ / molar mass of MgCl₂
Moles of MgCl₂ = 34.52 g / 95.21 g/mol
Moles of MgCl₂ = 0.363 mol
According to the balanced equation, the stoichiometric ratio between HCl and MgCl₂ is 2:1. Therefore, the moles of HCl required can be calculated as follows:
Moles of HCl = 2 * Moles of MgCl₂
Moles of HCl = 2 * 0.363 mol
Moles of HCl = 0.726 mol
To calculate the number of molecules, we need to use Avogadro's number, which is approximately 6.022 x 10^23 molecules/mol.
Number of molecules of HCl = Moles of HCl * Avogadro's number
Number of molecules of HCl = 0.726 mol * 6.022 x 10^23 molecules/mol
Number of molecules of HCl = 4.37 x 10^23 molecules
Therefore, approximately 4.37 x 10^23 molecules of HCl would be required to form 34.52 g of MgCl₂.
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*
What process did they use to figure out why the beaker disappeared?
Answers
Answer:
Why does a beaker disappear in oil?
If you submerge regular glass in vegetable oil, the light is refracted between the oil and the glass surface, allowing you to see the glass through the oil. ... The Pyrex® glass has the same angle of refraction as the vegetable oil, so the light bends at the same angle. As a result, the Pyrex® glass seems invisible.
Explanation:
A boy sets up a picnic on the beach next to a sand dune. How are sand dunes formed?
A. erosion and deposition
B. weathering and erosion
C. tectonic plates
D. precipitation
Answers
Answer:
B. Weathering and Erosion
Explanation:
I majored in Chemistry
Answer:
b
Explanation:
Question 4 (1 point)
Members of the alkaline earth elements have several things in common.
They are metalloids with two valence electrons.
metals that are not very reactive.
nonmetals and are nonreactive.
metals with two valence electrons.
Answers
Answer:
Explanation:
Alkaline earth elements are a group of six chemical elements in group 2 of the periodic table. They are beryllium (Be), magnesium (Mg), calcium (Ca), strontium (Sr), barium (Ba), and radium (Ra). These elements have very similar properties: they are all shiny, silvery-white, somewhat reactive metals at standard temperature and pressure.
The correct statement about alkaline earth elements is that they are metals with two valence electrons. They readily lose these two electrons to form cations with a charge of +21.
Which of the following statements best compares nuclear power and geothermal energy based on their rates of renewal?
Nuclear power has a faster rate because all elements present in Earth's crust are spontaneously radioactive and are potential nuclear fuels.
Nuclear power has a slower rate because the nuclear waste produced is not radioactive and thus cannot be used further as a fuel.
Geothermal has a slower rate because the average temperature of the core of Earth is gradually lowering.
Geothermal energy has a faster rate because there is a continuous flux of heat from Earth's core.
Answers
Answer:
Nuclear power has a slower rate because the nuclear waste produced is not radioactive and thus cannot be used further as a fuel. Geothermal has a slower rate because the average temperature of the core of Earth is gradually lowering, Geothermal energy has a faster rate because there is a continuous flux of heat from Earth's core.
Explanation:
C
Which structure is the Lewis structure for ammonia (NH3)?
A.
A bond line structure of a compound has N H H H. The nitrogen has two dots at its bottom represents a lone pair of electrons.
B.
A bond line structure of a compound has H N H in the linear plane and hydrogen is branching upward, and the compound is H N (H) H.
C.
A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons.
D.
A bond line structure of a compound has H N H H. The nitrogen has two dots on its top represents a lone pair of electrons.
Answers
Answer: **
H-N-H
|
H
Explanation:
Look at a periodic table to determine how many electrons you need to account for. Hydrogen (H) only has 1 electron, while Nitrogen (N) has 5. We have three Hydrogen atoms and one Nitrogen atom, so the total number of electrons will be 3 * 1 + 5 = 8 e-.
Now, place the center atom, which will be Nitrogen and place the three Hydrogens on three sides of it as above in the answer. You should use single bonds for this. Each single bond is a pair of electrons, so since we have three single bonds so far, we have accounted for 2 * 3 = 6 electrons. However, we need 2 more electrons for the total of 8. We put these electrons in as a lone pair above Nitrogen.
We check to see if everything follows the octet rule: Nitrogen has three single bonds, so that's 6 e-, as well as one lone pair, so that's another 2 e- for a total of 8 e-. Check. Now look at Hydrogen: H is the only element whose full orbital is 2 e-. Each H has a single bond with Nitrogen, so each does have 2 e-.
Thus, we know this is the correct diagram, and we are done.
Explanation:
A bond line structure of a compound has H N H in linear plane and a hydrogen is branching upward, and the compound is H N (H) H. The nitrogen has two dots at its bottom represents a lone pair of electrons. So ,the correct answer is option C.
The correct Lewis structure for ammonia (\(NH_3\)) is option C. It shows a bond line structure with three hydrogen atoms (H) bonded to a central nitrogen atom (N) in a linear plane.
One hydrogen atom branches upward from the plane. Additionally, the nitrogen atom in this structure has two dots at its bottom, indicating a lone pair of electrons. This arrangement follows the octet rule, as nitrogen has formed three covalent bonds with hydrogen, completing its valence shell. The lone pair on nitrogen gives ammonia its characteristic properties.
Thus, option C accurately represents the Lewis structure of ammonia, showing the bonding and lone pair arrangement of its atoms.
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If you want there to be less of you tomorrow than today... you need to lose
Answers
Answer:
rise your words, not your voice rain grows flowers thunder does not.
Explanation:
off the top of my head
Hydrogen protons collide with one another to create:
A). Helium and energy.
B). Boron and energy.
C). Carbon monoxide and energy. D). None of the above.
Answers
Explain how a cold compress used by
athletes is an endothermic or exothermic
reaction.
Please helppp
Answers
Answer: A cold compress used by athletes is an endothermic reaction.
Explanation:
A pack of cold compress used by athletes contains water that holds another bag or tube inside it which is filled with ammonium nitrate fertilizer.
So, on hitting the cold compress the tube breaks down due to which fertilizer gets mixed with water. This mixture absorbs the heat when placed on the area of body having pain, strain or bump.
As a result, we tend to feel cold at the affected area of our body.
Thus, we can conclude that a cold compress used by athletes is an endothermic reaction.
Part B
The image models what happened after each cup was placed over an effervescent tablet. Note the changes in the water level and the air space in both glasses. The tablets are shown to help see how the experiment was setup, but the model represents the air bubbles after the tablets fully dissolved. Write down your observations in the space provided.
Answers
Answer:
The Changes I see is the Hot glass have less air bubbles than the Cold Glass. The Cold Glass has more air bubbles than the Hot Glass.
I hope this helps. I tried my best!! Good Luck!!
True or false atoms are the smallest particle of an element that have that elements properties
Answers
Answer:false
Explanation:false
Answer:
true
Explanation:
hoping for the brainliest
A person on a diet loses 15 lb in 3.5 months. Calculate the average weight loss in milligrams per second (mg/s).
Answers
The average weight loss is 0.739 mg/s.
The total weight lost by the individual = 15 lb
To convert Ib to mg
1 Ib = 453592 mg
15 lb = 15 lb * 453592 mg/ 1 Ib
= 6803880 mg
The time taken for the weight loss = 3.5 months
Number of seconds in 3.5 months = 9.198 * 10^6 seconds
Hence;
Average weight loss in milligrams per second (mg/s);
Weight lost/ time taken
6803880 mg/9.198 * 10^6 seconds
= 0.739 mg/s
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Predict and explain the structure of the major and minor products when hydrogen bromide is added to 2-methylbut-2- ene, (Ch3)2CCHCH3
Pls help with homework!!!!
Answers
When hydrogen bromide (HBr) is added to 2-methylbut-2-ene ((CH3)2CCHCH3), an electrophilic addition reaction takes place, where the π bond of the alkene is broken, and the hydrogen and bromine atoms are added to the resulting carbocation.
The reaction proceeds through a Markovnikov addition, where the hydrogen atom attaches to the carbon atom with the greater number of hydrogen atoms.
In this case, the initial addition of HBr to 2-methylbut-2-ene leads to the formation of a primary carbocation, as the positively charged carbon atom only has one alkyl group attached to it. The primary carbocation is relatively unstable, and it can undergo a rearrangement to form a more stable secondary carbocation.
The major product that is typically obtained is the 2-bromo-2-methylbutane. The hydrogen atom from HBr adds to the carbon with three hydrogen atoms (the more substituted carbon), resulting in the formation of a secondary carbocation.
On the other hand, a minor product is also formed, which is 3-bromo-2-methylbutane. This product arises from the addition of HBr to the primary carbocation, which is less stable. Although the primary carbocation is less favored, it can still be formed and lead to the formation of the minor product.
In summary, the addition of HBr to 2-methylbut-2-ene yields two products: the major product is 2-bromo-2-methylbutane, resulting from the addition of HBr to the more stable secondary carbocation, and the minor product is 3-bromo-2-methylbutane, originating from the less stable primary carbocation.
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CAN SOMEONE PLEASE HELP ME I WILL MARK AS BRAINLIEST :(
Answers
Answer:
ok so i did the problem and the answer was 8e+29
Explanation:
i dont really know what the answer is but thats the answer i got
sorry if this didnt help
Question Completion Status:
GMU: Which reaction below would result in a net increase in entropy?
CaO(s) + SO3(g) → CaSO4(s)
O 3H2(9) + N2(g) → 2NH3(9)
O 12(9)→21(g)
O PC13(g) + Cl2(g) → PC15(9)
Answers
The reaction below that would result in a net increase in entropy is
I₂(g) ⇒ 2I(g) and the correct option is option 3.
Entropy is the measure of the disorder of a system. It is an extensive property of a thermodynamic system, which means its value changes depending on the amount of matter that is present.
Entropy increases when solid changes to a liquid and a liquid changes into gases.
Entropy also increases when the number of moles of gaseous products increases more than the reactants.
In this reaction, the reactant side has 1 mole of a gas while product has two moles and thus increase in entropy.
Thus, the ideal selection is option 3.
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please help me with these
Answers
1) Diesel has a higher viscosity than petrol.
2) Petrol is more flammable than diesel.
3) The formula will be C₁₀H₂₂.
4) The equation is; 2C8H18+25O2→16CO2+18H2O.
What is the hydrocarbon?Depending on the precise composition and temperature, the viscosity of gasoline and diesel can change. In general, diesel is more viscous than gasoline. Higher viscosity fluids are thicker and flow more slowly than lower viscosity fluids because viscosity relates to the resistance of a fluid to flow.
Diesel is less flammable than gasoline. The lowest temperature at which gasoline can evaporate and turn into an ignitable combination in air is known as its flash point, and it is lower for gasoline. Compared to diesel fuel, petrol vapors are much more flammable and can ignite at lower temperatures.
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Arrange the following elements in order of decreasing electronegativity:
Strontium, Magnesium, Barium, Beryllium, Radium and Calcium.
Answers
Answer:
Be,Mg,Ca,Sr,Ba.Ra[down the group electronegativity is decreasing]
Explanation:
The following elements in order of decreasing electronegativity are:
Beryllium > Magnesium > Calcium > Strontium > Barium > Radium.
Which is the correct order for decreasing the strength of electronegativity?Electronegativities decrease from top to bottom within a group of elements. The order of decreasing electronegativities F > Cl > Br > I is another sequence that we will use to interpret the chemical and physical properties of organic compounds.
What is the order of decreasing atomic radius?
In the periodic table, atomic radii decrease from left to right across a row and increase from top to bottom down a column. Because of these two trends, the largest atoms are found in the lower-left corner of the periodic table, and the smallest are found in the upper right corner.
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3.
Standard reduction potential for cobalt and plumbum are given below.
Answer the following questions based on that data.
Co^2+(ag) + 2e -> Co(s)
E° = - 0.28 V
Pb^2+(ag) + 2e -> Pb($)
E° =-0:13 V
(i)Determine the anode and cathode.
(ii) Draw and label the galvanic cell diagram.
(iii) State two functions of salt bridge.
Answers
The cobalt is the anode and the lead is the cathode
A salt bridge is a component of a galvanic cell that connects the two half-cells and allows the transfer of ions between them. Second, the salt bridge helps to maintain the charge balance in the two half-cells.
What is the galvanic cell?A galvanic cell, also known as a voltaic cell, is a device that converts chemical energy into electrical energy.
It consists of two half-cells that are connected by a salt bridge or a porous barrier, which allows for the transfer of ions between the two solutions without mixing them. Each half-cell consists of an electrode and an electrolyte solution.
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Entropy is a measure of
1.
accuracy
2.
precision
3.
the disorder of a system
4.
the attraction of a nucleus for an electron
Answers
Answer:
The answer is actually 3. The disorder of a system.
Of the following regions of the electromagnetic spectrum, which one has the shortest wavelength?
a.
gamma rays
b.
infrared
c.
radio waves
d.
X rays
e.
microwaves
f.
ultraviolet
Answers
Answer:
A ---->gamma ray
Explanation:
Gamma rays have the highest frequencies among all electromagnetic waves and therefore have the shortest wavelengths.
Which statement is an example of an observation a scientist would make to classify a rock?
A rock is larger than other rocks.
A rock was found in a stream.
A rock is formed from molten lava.
A rock cracks in half after a rainstorm.
Answers
Answer:
A rock is formed from molten lava.
Explanation:
got it right on edge 2021
The statement is an example of an observation a scientist would make to classify a rock is a rock is formed from molten lava. Therefore, option C is correct.
What is molten lava ?The term molten lava is also known as magma. The lava is also used for the solidified the rock produced by the cooling of a molten lava. The molten lava is made up of a slush of crystals, liquid, and bubbles.
The molten lava specially coming from the Earth's middle layer, and the sandwiched between the crust and the core. The term magma for molten rock that is underground and lava for molten rock that split through the Earth's surface.
A rock is formed from molten lava is an example of an observation a scientist would make to classify a rock.
Thus, option C is correct.
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What is the greenhouse effect?
O A. Gases from trees and grass leave the atmosphere.
B. Gases in the atmosphere block the sun's rays.
C. Gases in the atmosphere prevent heat from escaping.
D. Gases from burning fuels create air pollution.
Answers
Answer:
C. Gases in the atmosphere prevent heat from escaping
Explanation:
Took one for the team and caught an L, C was the right answer
The greenhouse gases are known as the gases which absorb the infrared radiations and create greenhouse effect. Gases in the atmosphere prevent heat from escaping is the greenhouse effect. The correct option is C.
The process by which the radiations of the sun are absorbed by the green house gases and are not reflected back into the space is defined as the greenhouse effect. This insulates the earth and prevents it from freezing.
The green house effect increases the surface temperature of earth and also causes global warming.
Thus greenhouse effect is option C.
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