Answer:
Using the VSEPR theory, the electron bond pairs and lone pairs on the center atom will help us predict the shape of a molecule. The shape of a molecule is determined by the location of the nuclei and its electrons. The electrons and the nuclei settle into positions that minimize repulsion and maximize attraction.
When fat comes in contact with sodium hydroxide, it produces soap and glycerin. Determine whether this is a physical change or a chemical change. Explain your
Answer:
It is a chemical change
Explanation:
Fat is a triglyceride. Triglycerides form soap when they come into contact with sodium hydroxide.
Now, we know that a chemical change is one in which a new substance is formed and it is not easily reversible. Heat is also given out or absorbed in the process.
Now the combination of sodium hydroxide and fat yields a new substance called soap. The appearance of the new substance conclusively proves that a chemical change has taken place.
When sugar is mixed with water, equilibrium is reached when: _______
a. the dissolved sugar molecules are evenly distributed throughout the solution.
b. molecules of sugar stop moving.
c. two tablespoons of coffee are added.
d. water and sugar molecules are moving at the same speed.
e. there is the same number of water molecules as dissolved sugar molecules.
According to the solubility concept, when sugar is mixed along with water, chemical equilibrium is reached as the dissolved sugar molecules are evenly distributed throughout the solution.Thus, the correct option is A.
Solubility is defined as the capability of a substance which is basically a solute forming a solution with another substance. There is an extent to which a substance is soluble in a particular solvent. This is generally measured as the concentration of a solute which is present in a saturated solution.
The solubility depends on the composition of solute and solvent ,its pH and presence of other dissolved substance. It is also dependent on temperature and pressure which is maintained.
Thus, when sugar is mixed with water, equilibrium is reached when the dissolved sugar molecules are evenly distributed throughout the solution.Thus, the correct option is A.
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predict what would happen if two people with equal mass standing on skateboard pushed against each other
Answer: They would both be pushed backward. (READ EXPLANATION)
Explanation:
Since your question has an error in it, I will provide two answers. If they were standing on their feet, they would not move. if they're both standing on skateboards, they would both move backwards because they have no friction on the ground. if both of them are standing on the same skateboard and pushing against each other, they would not move.
For the following molecules, what is the order of Bronsted acidity, from highest to lowest
Answer:
Rank these compounds in order of increasing basicity. (Least basic to most basic)
a. C, B, A
b. B, A, C
c. C, A, B
d. A, B, C
ANSWER: d
I did the quiz already **spoil alert ace that quiz baby heck yea**
Explanation:
If u need proof that its correct the image below with help!
-Good Luck Today
cholorine is more reactive than nitrogen? why
Answer:
Because of the presence of lone pairs in nitrogen it further adds to its reactivity. Hence nitrogen is more electronegative than chlorine. ... Chlorine is less reactive than nitrogen in other words nitrogen is more reactive than chlorine
Explanation:
Brainliest plzzzzzzzzzzzzzzzzzzz
Complete the complex dimensional analysis problem to determine the price of one atom of aluminum. A 20cm x 20cm square of aluminum had a mass of 1.50g. A box of aluminum cost $1.29 and the area of foil in the box is 2.33 m^2. What is the cost of one atom of aluminum?
$8.09
Because you multiply and subtract to get the answer
Olive oil has a density of 0.917 g/mL. What is the volume, in gallons, of 50.0
pounds of olive oil
Answer:
[tex]V=6.54L[/tex]
Explanation:
Hello!
In this case, since we are given the density in g/mL, the first step is to compute the mass in grams as shown below:
[tex]m=50.0lb*\frac{454g}{1lb} =22700g[/tex]
Now, we use the density to compute the volume as follows:
[tex]V=22700g*\frac{1mL}{0.917g} =24.755mL[/tex]
Finally, we convert to gallons:
[tex]V=24755mL*\frac{1L}{1000mL} *\frac{1gal}{3.7854L}=6.54L[/tex]
Best regards!
What is the momentum of a car with a mass of 1500 kg traveling north at a speed of 30 m/sec?
Answer:45kg
Explanation:
The momentum of a car with a mass of 1500 kg traveling north at a speed of 30 m/sec is 45000 kg-m/s.
What is momentum ?
The term momentum is defined as the product of the mass and velocity of an object. It is a vector quantity, having a magnitude and a direction. If m is an object's mass and v is its velocity, then the object's momentum p is: mass × velocity.
When you throw a ball at someone, and it hits him square in the face. It shows how difficult it would have been to put a stop to the thing. A baseball flies through the air. A large truck is on the move. A bullet fired from such a weapon.
Given:
Mass of the car, m = 1500 kg
Speed of the car, v = 30 m/s (towards north)
We have to find The momentum of the car,
Solution:
Let p is the momentum of an object. It can be calculated by the product of mass and its velocity. The formula to find it is given by :
p = m × v
= 1500 × 30
= 45000
Thus, the momentum of a car with a mass of 1500 kg traveling north at a speed of 30 m/sec is 45000 kg-m/s.
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1. About how many Atlantic horseshoe crabs were caught in 2017?
Answer:
994,491 were caught in 2017
fine the average acceleration of the cyclist moving from point A to point B , and over the whole trip ( from point A to point D ) .
Explanation:
Andresiaは13.1マイルの長さのレースを走っています。彼はすでに1.1マイル走っています。アンドレスが走るために残っているマイル数を再確認する
On the basis of strength of intermolecular forces, which of the following elements would be expected to have the highest melting point?
Answer:
I think its Kr
Explanation:
sorry if I'm wrong
Bromine (Br₂) has the highest melting point among the given elements. Therefore, option (A) is correct.
What are intermolecular forces?Intermolecular forces can be described as the attractive and repulsive forces that develop between the molecules of a substance. These forces are responsible for most of the chemical and physical properties of matter. The intermolecular forces between the molecules are Vander Waals forces.
Forces that exist between the molecules themselves are known as intermolecular forces. The particles of solids and liquids are held together by intermolecular forces.
The intermolecular forces are Dipole-Dipole Interactions, Ion-Dipole Interactions, Ion-Induced Dipole Interactions, Dipole-Induced Dipole Interaction, and Dispersion Forces.
As the size of the atoms increases the strength of the intermolecular force also increases and a large amount of energy will be required to break bonds. Since Bromine has the largest size among the all other elements. Therefore, Bromine will have the highest melting point.
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Your question was incomplete, but the complete question was,
On the basis of the strength of intermolecular forces, which of the following elements would be expected to have the highest melting point?
A) Br₂
B) Cl₂
C) F₂
D) N₂
When calcium and phosphorus form an ionic bond, what is the chemical formula of the compound?
Which of the following reactions in a redox reaction?
a
2 Mg(s) + O2(g) → 2 MgO(aq)
b
HCl(aq) + NaOH(aq) → H2O(l) + NaCl(aq)
c
Pb(NO3)2(aq) + KCl(aq) → PbCl2(aq) + KNO3(aq)
d
CaCO3(s) → CaO(s) + CO2(g)
Answer:
a
2 Mg(s) + O2(g) → 2 MgO(aq)
Explanation:
11. 2073 Set D Q.No. 1 Ammonia molecule has got trigonal
pyramidal geometry even though nitrogen of ammonia gets
sp3 hybridization. Give reason.
[2]
Answer:
See explanation
Explanation:
I know that we usually associate the sp3 hybridization to the tetrahedral shape. This is common in molecules such as CH4. So it may sound somewhat strange that NH3 molecule has an sp3 hybridized nitrogen atom and a trigonal pyramidal geometry.
Let us recall that the central nitrogen atom in NH3 has a lone pair of electrons. These lone pairs causes more repulsion than bond pairs. As a result of the presence of this lone pair, the bond angle in the NH3 molecule is distorted away from the expected 109.7 degrees in tetrahedral geometry and the bonding groups are now arranged in a trigonal pyramidal geometry(with bond angle less than 109.7 degrees) to minimize electron pair repulsions.
Why is the mass of an actual element/ atom different then the number show on the periodic table?
A. The periodic table contains the mass of the most abundant isotope only
B. The periodic table contains an average mass of isotopes by abundance
C. The periodic table contains the largest mass of all isotopes
D. It is the same, the mass shown is the mass of an element/ atom
Answer:
B.
Explanation:
The atomic masses listed on the periodic table are a weighted AVERAGE of an element's isotopes.
What does an electric field
surround?
Answer:
An electric field is the physical field that surrounds each electric charge and exerts force on all other charges in the field, either attracting or repelling them.
______________
meow
Which best summarize the scientist process that led to our current understanding of DNA
Answer:
Each scientist made an important, but unrelated, contribution. Scientists built on the previous work of other scientists to make new discoveries. Most of the discoveries were made by chance and did not depend on prior knowledge.
Explanation:
i hope i helped * :3
How many atoms in 5.01 mole of lead?
Answer:
30.17 × 10²³ atoms
Explanation:
Given data:
Number of moles of lead = 5.01 mol
Number of atoms = ?
Solution:
Avogadro number:
The given problem will solve by using Avogadro number.
It is the number of atoms , ions and molecules in one gram atom of element, one gram molecules of compound and one gram ions of a substance.
The number 6.022 × 10²³ is called Avogadro number.
For example,
18 g of water = 1 mole = 6.022 × 10²³ molecules of water
1.008 g of hydrogen = 1 mole = 6.022 × 10²³ atoms of hydrogen
In given question:
1 mole = 6.022 × 10²³ atoms
5.01 mol × 6.022 × 10²³ atoms / 1 mol
30.17 × 10²³ atoms
Calculate the density of a substance for which 4.78 x 106 L of the substance has a mass of 1.50 x 107 kg. Express your answer using the correct number of significant figures, and do not enter your answer using scientific notation.
The density of a substance for which 4.78 x 106 L of the substance has a mass of 1.50 x 107 kg is 3.138 x 10¹².
What is density?Density is the mass per unit volume. Density is s a scalar quantity. It is calculated by dividing the mass by volume. It is denoted rho, a Greek letter. It is denoted by a small d.
rho = m / v
rho = density
m = mass
V = volume
The mass is calculated in grams and kilograms. The volume mass and density are interrelated if two entities are given, the third can be calculated.
Given, that the volume of a substance is 4.78 x 10⁶ L
The mass of the substance is 1.50 x 10⁷ kg
So, put the values in the formula
d = m / v
d = 1.50 x 10⁷ / 4.78 x 10⁶
d = 3.138 x 10¹²
Thus, the density of a substance is 3.138 x 10¹².
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PLEASE HELP ASAP I NEED IT HELP PEASEEEEEEEEEEE it’s number 4 (this is science)
5
is the sum of the kinetic energy and the
of the particles that make up an object. *
(7 Points)
Thermal energy, potential energy
mechanical energy, potential energy
ООО
chemical energy, mechanical energy
Thermal energy, mechanical energy
Answer:
The total amount of mechanical energy is merely the sum of the potential energy and the kinetic energy. This sum is simply referred to as the total mechanical energy
A gene carries the ________ for a trait. brainpop
Which of the following is absolutely necessary for cloud formation?
A) Condensation nucleii
B) Hydrogen gas
C) Liquid methane
D) Blue food coloring
Answer:
The correct answer is letter A. Condensation nucleii
n a system for separating gases, a tank containing a mixture of hydrogen and carbon dioxide is connected to a much larger tank where the pressure is kept very low. The two tanks are separated by a porous membrane through which the molecules must effuse. If the initial partial pressures of each gas is 5.00 atm, what will be the mole fraction of hydrogen in the tank after the partial pressure of carbon dioxide has declined to 4.50 atm?
a. 52.1%
b. 27.4%
c. 4.68%
d. 37.2%
e. 32.1%
Answer:
52.63%
Explanation:
We can obtain the mole fraction from the formula;
partial pressure = mole fraction * total pressure
mole fraction = partial pressure/total pressure
Partial pressure of Hydrogen = 5.00
Partial pressure of Carbon-dioxide= 4.50
Total gas pressure = 9.50
Mole fraction of Hydrogen = Partial pressure of Hydrogen/ Total gas pressure
= 5.00/9.50
= 0.5263
= 52.63%
Identify three nonmetal atoms that, when bonded covalently, have an argon electron configuration.
Answer:
Phosphorus
Sulphur
And chlorine are non metals when bonded covalently gain electronic configuration of argon
Like PCl3
SO2 and HCl
Explanation:
calculate the relative atomic mass
Answer:
add the isotopes atomic masses and divide by their number
Explanation:
Please help asap and thank you
Answer:
Metamorphic rock
Explanation:
metamorphic rocks do not get hot enough to melt they just get denser if they did they would become igneous rocks.
Type the correct answer in the box. A car accelerates from 4 meters/second to 16 meters/second in 4 seconds. The car's acceleration is _
Answer:
Formula for acceleration is
V-U÷T
In the given information
V=16
U=4
T=4
Acceleration =16-4/4
=3 metre per second ^2
Explanation:
In which way does electricity flow in a DC circuit? *
From the negative terminal of the battery to the positive one
From the positive terminal of the battery to the negative one
The electricity flows first from the negative terminal to the positive one, then the
polarity switches
The electricity flows first from the positive terminal to the negative one, then the
polarity switches
Answer:
From the negative terminal of the battery to the positive one
Explanation:
DC is just dirrect current that has e- flowing from the negative terminal to the positive.
Why does a rock sink in water? *
Answer:
Rocks sink in water their density is greater than the density of the water.
Explanation:
The density is 997 kg/m³ or about 1 g/cm³. Anything with a density greater than that will sink in water.
Due to the fact that a rock has a higher density than water, it sinks in liquid. Objects with a higher density than the surrounding fluid will sink because density is the mass of an object per unit volume.
Due to the fact that rocks often have a higher density than water, the gravitational pull of the rock is larger than the buoyant pull of the water. The rock defeats the buoyant force as a result, sinking to the bottom. According to Archimedes' principle, the principle of buoyancy asserts that an object submerged in a fluid feels an upward buoyant force equal to the weight of the fluid it displaces.
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