Answer:
The properties of liquids are intermediate between those of gases and solids, but are more similar to solids. In contrast to intramolecular forces, such as the covalent bonds that hold atoms together in molecules and polyatomic ions, intermolecular forces hold molecules together in a liquid or solid. Intermolecular forces are generally much weaker than covalent bonds. For example, it requires 927 kJ to overcome the intramolecular forces and break both O–H bonds in 1 mol of water, but it takes only about 41 kJ to overcome the intermolecular attractions and convert 1 mol of liquid water to water vapor at 100°C. (Despite this seemingly low value, the intermolecular forces in liquid water are among the strongest such forces known!) Given the large difference in the strengths of intra- and intermolecular forces, changes between the solid, liquid, and gaseous states almost invariably occur for molecular substances without breaking covalent bonds.
Explanation:
im not sure this is what your looking for but i found this
I have it attached plz help ASAP
Answer:
The answer would most likely be C
56ude67fv67gbubvtyfg help PLS
Answer:
p=5.0g/cm³
Explanation:
density formula
p=m/v
And if im not mistaken the stone weighs 200grams
The Volume of the tube increases by 40
So
p=200/40
p=5.0g/cm³
A 4.50 g sample is analyzed and found to contain 3.22 g of carbon, 0.300 g of hydrogen, 0.221 g of nitrogen, and the rest is oxygen. The molar mass of the actual compound is found to be 285 g/mol. Find the empirical formula and then the molecular formula.
The empirical formula and the molecular formula are the same : C₁₇H₁₉NO₃
Further explanationGiven
3.22 g of carbon, 0.300 g of hydrogen, 0.221 g of nitrogen, and the rest is oxygen.
Required
The empirical formula and then the molecular formula.
Solution
Mass of Oxygen = 4.5 - (3.22+0.3+0.221)=0.759 g
Mol ratio of elements C : H : N : O =
3.22/12 : 0.3/1 : 0.221/14 : 0.759/16 = 0.268 : 0.3 : 0.016 : 0.047
Divide by 0.016 :
16.75 : 18.75 : 1 : 2.9375 = 17 : 19 : 1 : 3
(C₁₇H₁₉NO₃)n = 285
(12.17+19+14+3.16)n = 285
(285)n = 285
n = 1
Then the empirical formula and the molecular formula are the same
Name the type of food additive that stops the food reacting with oxygen.
Answer:
Antioxidants such as vitamin C are preservatives by inhibiting the degradation of food by oxygen. Bulking agents such as starch are additives that increase the bulk of a food without affecting its taste.
Which of these choices describes a segment of
DNA that determines a specific trait in a person,
such as attached earlobes?
A. a gene
B. a phenotype
C. a chromosome
D. a characteristic
Please help ..
6. A family decided to take a trip to Europe. The plane they took flew at an average speed of 500 miles per hour
during the flight. The plane covered a distance of 5,000 miles during the flight. How long was the flight?
Your answer
Answer:
10 hours
Explanation:
Answer:
10
Explanation:
The picture below shows a sample from a tree.
What kind of tree is this?
Answer:
I believe it is Spruce, because of the shape of the leaves
Answer:
Explanation:
Spruce
Which of the following elements has properties different than the rest?
K
O
H
N
Answer:
N
Explanation:
the rest are metals. elements of group 1 and 2
PLS HELP!!
Balance this equation: __H2+ 2 O2---> 2 H2O
Answer:
2H₂ + O₂ → 2H₂O
Explanation:
The expression of the equation is given as:
_H₂ + 2O₂ → 2H₂O
Now for expression above,
Reactants Products
H 2 4
O 4 2
to balance the equation, we use 2 moles of hydrogen gas and 1 mole of oxygen gas;
2H₂ + O₂ → 2H₂O
Help please
What percentage of the world does not have a reliable source for clean water?
Answer:9%
Explanation:
3) Convection can only happen in what? *
Answer:
Convection can only happen with liquids and gases.
Hope it helps :)
The point of a cell division is to? a) copy tissue b) common cell c) neuron d) all choices are true
Answer: a) copy tissue
Explanation:
Tissue and cells in general get damaged, or just break down from wear and tear. So the cells divide to make up for this shortcoming, effectively replacing any broken parts with fresh new ones.
Please help me out if your good at science:)ill mark brainliest if correct
A. It helps people stay in touch with friends who live far away.
B. It helps track objects in motion.
C. It helps see microscopic cells at work.
D. It helps diagnose health problems.
Which is a property of all atoms?
a. More electrons than protons
b. A nucleus with a positive charge
c. A positively charged electron cloud
d. Same number of protons as neutrons
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Is anybody see my princess i mean sara
Answer:
hi I dont see princess or sara but have a good day!
Answer:
Hola chica
¿Qué paso?
Dimelo
A 32-year-old man presents describing an intense fear of germs. He continually
experiences thoughts about contracting an illness by coming into contact with things in
the environment, such as doorknobs or seats in public places. His intense fear of germs
has resulted in repetitive hand washing. He describes brief relief after hand washing but,
because his thoughts about contamination keep returning, he states that he "cannot help
but wash again for hours a day" Both of his hands are red, raw, and cracked and he had to
leave his job because of his fear of sitting down in public places,
Explain intermolecular forces cause water molecules to stick to a material like a glass pitcher
Answer:
Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.
Intermolecular forces such as dipole-dipole forces, London dispersion forces exist between molecules and these depend on strength of electronegativity of molecule. Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher.
What is intermolecular forces of attraction?Intermolecular forces of attraction is force of attraction that make two molecule come closer. Intermolecular forces of attraction is directly proportional to the electronegativity of the molecule.
Cohesive forces cause the water molecules to stick together with a lot of elasticity, allowing the water to function very much like a rubber into a material like a glass pitcher.
Therefore, cohesive forces cause water molecules to stick to a material like a glass pitcher.
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Calculate the current needed to provide 30000C of electricity In 5 minute
Which orbital notation represents the second principal energy level of a silicon atom in the ground state?
Answer:
2
Explanation:
Silicon is one the elements found in nature and well positioned the periodic table.
It has an atomic number of 14 with an electronic configuration:
1s² 2s² 2p⁶ 3s² 3p⁴
From this formula the orbital notation that represents the second principal energy level is 2.
The main energy level in which the orbital is located or the average distance of the orbital from the nucleus is the principal quantum number.
It takes the number 1,2,3,4,5 e.t.c
What is an ion? Write its types with example.
Answer:
an ion is an element that carries either positive or negative charge. the example are cation which has a positive charge e.g H+ and anion which had a negative charge eg Cl-.
What is Electron configuration for a tin atom in the excited state and why
When the tin atom is excited, then the tin atom absorbs energy. As a result, an electron in the 5s orbital jumps to the 5pz orbital.
What is meant by tin atom?The electron configuration exists in the distribution of electrons of an atom or molecule in atomic or molecular orbitals.
tin (Sn), a chemical element belonging to the carbon family, Group 14 (IVa) of the periodic table. It is a soft, silvery white metal with a bluish tinge, known to the ancients in bronze, an alloy with copper. Tin is widely used for plating steel cans used as food containers, in metals used for bearings, and in solder.When the tin atom is excited, then the tin atom absorbs energy. As a result, an electron in the 5s orbital jumps to the 5pz orbital.
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What is the pauli exclusion principle and how does it apply to electron configuration?
Answer:
pauli exclusion principle states that no two electrons in the same orbital can have the same spin.
Explanation:
this means you can't have 2 up arrows or 2 down arrows in your box
I need to know what is Mitosis ♀️
Answer:
a type of cell division that results in two daughter cells each having the same number and kind of chromosomes as the parent nucleus, typical of ordinary tissue growth.
Explanation:
Calculate the number grams present in each sample below.
15 moles NO2
Answer:
Ok 15 miles NO2 you need the salt and pepper trick so mix it add water sit in it when you get cold write down uh temperature then you need to get out or it may kill you when it starts to get cold then go to the y- axis then you need to ask your teacher for help after you do the y-axis
Help with this instruction booklet
What is a compound formed by the sharing of electrons called? I NEED THIS DONE RIGHT NOWWW
Answer:
Covalent bonds
Explanation:
Answer:
Covalent bonds
Explanation:
Covalent chemical bonds involve the sharing of a pair of valence electrons by two atoms.
Hope this helps :)
Help science loook at pictureeee
Answer: Convection current
Explanation:
Answer:
convection currents
Explanation:
A mountain ridge is a geological chain of mountains and/or hills
The diagram shows a convection current
Thermal conductivity is the ability to transfer ___.
Answer:
Thermal conductivity (often denoted by k, λ, or κ) refers to the intrinsic ability of a material to transfer or conduct heat.
Thermal conductivity is the ability to transfer heat.
Thermal conductivity is the measure of the capacity of a material to conduct heat. Materials with high thermal conductivity can transmit heat quickly, while materials with low thermal conductivity will transmit heat slowly or resist its movement altogether. Heat transfer is the movement of heat from one object or substance to another because of a difference in temperature. Heat can move by conduction, convection, and radiation.
The rate at which heat is transferred through a unit cross-section area of a material by conduction when a temperature gradient exits perpendicular to the area is known as thermal conductivity.
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Rolf prepares four solutions using different solutes as shown in the table below.
Which solution is unsaturated?
Solution A
Solution B
Solution C
Solution D
Answer:
Solution A
Explanation:
Correct on Edge Cumulative Review Exam 2021
Have a blessed day
The unsaturated solution is the one where, the amount solute is lower than the solubility at a specific temperature. Hence, the solution A will form an unsaturated solution.
What is unsaturated solution?Unsaturated solutions are those having the lower concentration of solute than the saturation point of the solvent. Whereas, a saturated solution will completely dissolve the solute in its maximum amount and beyond a point the solute cannot be dissolved.
At a specific temperature gradient, if the dissolved solute is equal to the solvent's saturation point it will form a saturated solution. From the given table it is clear that except solution A all solutions have higher amount of solute than the saturation point.
As the solute concentration is higher, the solvent will try to dissolve maximum amount of the solute. Hence, in solution A have only 20 g of solute added but its saturation point is 37 g/100g. THus, the solution forms an unsaturated solution.
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pls helpp
An unknown substance with a mass of 23.5 grams absorbs 419.7 J while undergoing a temperature increase of 76.0°C. What is the specific heat of the substance?
The specific heat of the substance : c = 0.235 J/g °C
Further explanationGiven
Heat absorbed by substance = 419.7 J
m = mass = 23.5 g
Δt = Temperature difference : 76 °C
Required
The specific heat
Solution
Heat can be formulated
Q = m.c.Δt
Input the value :
419.7 = 23.5 x c x 76
c = 419.7 : (23.5 x 76)
c = 0.235 J/g °C