Answer:
See explanation
Explanation:
The covalent network solid is composed of a network of strong covalent bonds rather than discreet molecules.
Covalent network solids are composed of atoms covalently bonded together into a three-dimensional network or layers of two-dimensional networks. Due to the strength of the covalent bonds, covalent network solids have high melting points(Khan Academy).
Examples of covalent network solids are Boron nitride, Silicon dioxide, diamond, graphite etc.
Which of the following would not cause an increase in the pressure of a gaseous system in a container? A The container is made larger. Additional gas is added to the container. B A C The temperature in the container is increased. The volume of the container is decreased.
Answer:
The container is made larger
Explanation:
Answer: The volume of the container is increased
Explanation:
The triple point of water occurs at a pressure of 4.59 mmHg.
What is the pressure in atm?
Answer:
The pressure in atm is 6.04 x 10^-3
Explanation:
Pressure of the gas is defined as the force exerted by the particles on the walls of the container. It is expressed in various terms like 'mmHg', 'atm', 'kiloPascals' etc..
All these units of pressure are inter convertible.
Pressure of the gas = 4.59 mm Hg
760 mm Hg = 1 atm
4.59 mm Hg= 1/760 x 4.59 = 6.04 x 10^-3atm
The pressure in atm is 6.04 x 10^-3
salat tarawih itu boleh dilakukan di masjis
is heating an aluminum pan a chemical or physical reaction
Answer: chemical
Explanation: whenever heat is applied, it indicates a chemical change
The actual brightness of a supergiant is more than the actual brightness of our sun. Explain why this
A supergiant is the largest star in space, so it is the brightest,
A supergiant is made up of different gases than our sun, so it is brighter,
A supergiant appears brighter than our sun, but our sun is actually brighter,
A supergiant is more powerful than our sun, so it gives off more light energy,
AMSWER:
B. I'm sorry if this is wrong
Explanation:
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Answer:
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31th July 2000
12. The molar mass of water is 18.0
g/mol. A mass of 90.0 grams of
water is equivalent to how many
moles?
HELP ASAP!!!
Answer:
5moles
Explanation:
number of moles=mass/molar mass
The molar mass of water is 18.0 g/mol. A mass of 90.0 grams of water is equivalent to 5 moles. Therefore, option B is correct.
What is molar mass ?The mass in grams of one mole of a substance is defined as its molar mass. Molar mass is measured in grams per mole, abbreviated as g/mol. The isotopic atomic mass of a single isotope of any given element is a value that compares the mass of that isotope to the mass of the isotope carbon-12.
A compound's molar mass can be calculated by adding the standard atomic masses (in g/mol) of its constituent atoms.
A compound's molar mass indicates the mass of one mole of that substance. In other words, it tells you how many grams of a compound there are per mole. As a result, the units for molar mass are grams/mole.
number of moles = mass / molar mas
= 90.0 grams / 18.0grams
= 5 moles
Thus, option B is correct.
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What is the name for a long , narrow glacier that forms between two peaks?
what is the reactivity of the element Nickel?
Answer:
Nikel isn't a reactive metal
What is the mass of 5.80 × 10²³ atoms of silver (Ag)?
A. 0.00893 g
B. 0.00963 g
C. 104 g
D. 112 g
Answer:
104 g
Explanation:
i just solved it
PCl3(g) + Cl2(g) ↔ PCl5(g) + energy. Some PCl3 and Cl2 are mixed in a container at 200 oC and the system reaches equilibrium according to the equation above. Which of the following causes an increase in the number of moles of PCl5 present at equilibrium?
Answer: Chlorine Oxide
Explanation:
How many electrons will aluminum gain or lose in forming an ion?
Answer:
It would tend to gain one electron and form a -1 ion. Aluminum is in the fifth column and therefore has 5 electrons in its outermost shell. It would tend to lose three electrons and form a +3 ion.
Explanation:
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Aluminum (Al) is an element with atomic number 13, which means it has 13 protons and 13 electrons in its neutral state.
How does aluminum form ionWhen forming an ion, aluminum tends to lose three electrons. This is because aluminum belongs to Group 13 in the periodic table, also known as the "boron group" or "Group IIIA."
Elements in this group have three valence electrons in their outermost energy level. To achieve a stable electron configuration, aluminum can lose these three valence electrons, leaving behind a complete inner electron shell and forming a 3+ cation.
So, when aluminum forms an ion, it loses three electrons to become Al3+.
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Answer:
Specific heat is defined by the amount of heat needed to raise the temperature of 1 gram of a substance 1 degree Celsius (°C). Water has a high specific heat capacity which we'll refer to as simply "heat capacity", meaning it takes more energy to increase the temperature of water compared to other substances.
Explanation:
HELP!! When nitroglycerin (C3H5N3O9) explodes, it decomposes into the following gases: carbon dioxide, nitrogen, nitrogen monoxide, and water vapor. If 239g of nitroglycerin explodes, what volume of water vapor will be produced at 45.00 inHg and 2678C?
Answer:
Carbon monoxide, and water vapor was analyzed and found to contain 4.5 mol of carbon dioxide, 4.0 mol of carbon monoxide and 1.5 mole of water vapor. ... An ideal gas sample weighing 0.548 g at 100°C and 0.993 atm has a volume of 0.237 ... VSEPR predicts that an IF5 molecule
Explanation:
The volume of the nitroglycerin exploded can be calculated using the ideal gas equation. Here, the number of moles of water vapor formed is 10.5 moles. Then, the volume is 43807 L.
What is ideal gas equation ?Ideal gas equation connects the pressure, temperature and volume of a gas with its number of moles as written in the expression below:
PV = nRT.
where R = 0.082 L atm /K mol
One mole of nitroglycerin produces 10 moles of water. Then, 239 g or 1.05 moles produces 10.5 moles of water vapor.
Given,
P = 45 mmHg = 0.05 atm
T = 2678°C = 2951 K
n = 10.5
The volume of water vapor is calculated as follows:
V = nRT/P
= (10.5 mol × 0.082 L atm/K mol ×2951 K)/0.05 atm
= 43807 L.
Therefore, the volume of water vapor produced is 43807 L.
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3. Given the Lewis electron-dot diagram:
H
H:C:H
I: 0:1
Which electrons are represented by all of the dots?
1) the carbon and hydrogen valence electrons
2) the carbon valence electrons, only
3) all of the carbon and hydrogen electrons
4) the hydrogen valence electrons, only
Answer:
1) the carbon and hydrogen valence electrons
Explanation:
The lewis dot diagram illustrates how electrons are arranged round atoms in a molecule. The dots represents the;
1) the carbon and hydrogen valence electrons
The lewis dot structure has been the representation of the valence electrons of carbon and hydrogen. Thus, option A is correct.
The lewis dot structure has been used for the determination of the bonding in the structure with the help of dots. The dots in the structure have been the representation of the electrons in the structure.
The given structure has consisted of the bonds between hydrogen and carbon. The given lewis dot structure has consisted of the 2 dots representing the two electrons i.e. one of hydrogen and one of carbon shared between the atoms.
Thus, the lewis dot structure has been the representation of the valence electrons of carbon and hydrogen. Thus, option A is correct.
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How is a temperature inversion like the temperatures of the stratosphere?
Answer:
When a weather phenomenon called a "temperature inversion" occurs, temperature in some part of the troposphere get warmer with increasing altitude, contrary to the normal situation. In the layer above the troposphere, the stratosphere, temperature rises with increasing altitude.
which statement describes why the viscosity of maple syrup is higher than that of orange juice?
A.The Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.
B. The molecules that make up maple syrup are positive ions, while the molecules that make up orange juice are negative ions.
C. The molecules that make up maple syrup have a harder time moving past one another because they are smaller than the molecules that make up orange juice.
D. The molecules that make up maple syrup are negative ions, while the molecules that make up orange juice are positive ions.
Answer: The Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice
Explanation:Ap3x
The correct statement about the viscocity of the maple syrup is that the Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.
What is viscosity?The resistance of a fluid (liquid or gas) to a change in shape or movement of adjacent sections relative to one another is called viscosity. Viscosity indicates resistance to flow.
The Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice is correct as it is related to movement.The molecules that make up maple syrup are positive ions, while the molecules that make up orange juice are negative ions as viscosity is not related to the charge.The molecules that make up maple syrup have a harder time moving past one another because they are smaller than the molecules that make up orange juice is incorrect because the small molecules relatively have great movement.The molecules that make up maple syrup are negative ions, while the molecules that make up orange juice are positive ions is also wrong.Hence the correct statement is that the Molecules that make up maple syrup have a harder time moving past one another because they are larger than the molecules that make up orange juice.
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How many grams are there in 4.50 moles of Na2SO4?
What is the volume of 13.20 grams of N2 at STP?
Here...........................
Why do we feel the heat from the sun even though it is far away from Earth?
O The sun is farther away from Earth than any other star.
The sun is closer to Earth than any other star.
O The sun is the largest star.
O The sun is the brightest star.
Answer:
B.) The sun is closer to Earth than any other star.
True or False. Physical changes result in the formation of a new substance.
True or False. A major clue to a chemical change is the formation of a new
substance.
Answer:
1. false
2. true
Explanation:
I hope this helps
ANSWER FAST
is water wet?
a.) yes
b.) no
c.) a baby goat is a kid
Answer:
c
Explanation:
How many molecules are in 1.2 L of CH4 at STP?
Answer: 4.48L of CH4 at STP is equal to 1.2×10^23 molecules
Explanation:
help " anyone" plz ....
Answer:
letter A. i hope this is correct answer
A truck was carrying a substance tank. The molecules of that substance were moving away from each other. The molecules truck parked overnight in a place where energy tranferred out of the substance. In the morning, the substance was a gas. How were the molecules moving in the morning? Explain why the molecules were moving that way after the energy was tranferred out of them.
Answer:
Molecules of matter such as liquid, gas and solid still move even if the energy is transferred because it isn't a hundred percent. There is still energy and the time it took to transfer that said energy would have changed its state of matter.
Explanation:
Solid -the molecules are tight together. (touching)
Liquid - the molecules are close but not touching about mid way(not to far not to close)
Gas- the molecules in gasses are far apart.
It almost always goes from solid to liquid to gas. but in extreme conditions it could be different.
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A student takes some cold water in a beaker and dissolves two tablespoons of salt in it. When the student adds one more tablespoon of salt it gets settled at the bottom of the beaker. The student warms the water and observes that the salt disappears. What can be the reason for this observation?
Heat increases the solubility of water
Heat evaporates the excess salt in solution
After heating the solution become saturated
Two table spoon of salt makes the solution unsaturated
Answer:
A
Explanation:
hi help plz .........
Answer:The answer is C) The total mass of C and D only.
The swimmer in the pool is making waves when he swims. Choose two sentences that describe both the swimmer’s waves and the waves the worker makes when he hammers on a ladder. Write the letters of the correct answers on the line at left.
Plsssss
Answer:
Energy is transferred from one place to another in the form of waves. Waves has two parts i.e. crest and trough.
Explanation:
Energy is transferred from one place to another in the form of waves. Waves has two parts, the highest part of a wave is called the crest, whereas the lowest part is called trough. The distance between the crest and the trough of a wave is known as wave height. When we drop something in the water, waves are produced having high crest and trough means high wave length whereas waves produced on the solid body has low crest and trough means low wave height.
What is the molar ratio of hydrogen (H2) to iron (Fe)?
Answer: 3:2
Explanation:
menciona tres ejemplos en los que un cálculo incorrecto en los en ingredientes indispensables para la elaboración de un producto traería consecuencias graves químicamente hablando
Explanation:
Cada producto o servicio, independientemente de su propósito, debe ser seguro de usar y desarrollado de acuerdo con los más altos estándares de calidad y seguridad.
Algunos ejemplos de cálculo incorrecto de ingredientes que tendrían graves consecuencias químicas podrían ser:
Medicamentos y vacunas: Este es quizás uno de los ejemplos que tendría las consecuencias más graves para las personas si hubiera un cálculo incorrecto de ingredientes, ya que la producción de medicamentos y vacunas es una industria que requiere la máxima calidad agregada debido a que se ocupa directamente de la salud y los errores de formulación pueden agravar la enfermedad y causar la muerte. Actualmente tenemos el ejemplo de la vacuna para el control de la pandemia, que antes de ser aprobada tuvo que someterse a una serie de investigaciones, pruebas en humanos y diferentes fases para demostrar su efectividad y no causar daño al organismo humano.
Cosméticos: Existen cosméticos de la industria de la belleza que tienen la función de prevenir el envejecimiento cutáneo, alisar el cabello, etc. Por tanto, un cálculo incorrecto de los ingredientes químicos también podría provocar daños irreversibles a la salud, como quemaduras en la piel, caída del cabello, alergias, cáncer, etc.
Alimentos: La industria alimentaria utiliza componentes químicos con el fin de conservar los productos y aumentar la vida útil, por lo que si se usan en cantidades mayores de las necesarias, dichos compuestos pueden causar enfermedades en las personas como intoxicación alimentaria, cáncer, gastritis, etc.