There are four equivalent best resonance structures of (PO₄)₃ according to the concept of resonance.
What is resonance?
The phenomenon of resonance which is also called mesomerism is the ability of the molecules or ions to explain the bonding in them by the combination of several canonical structures.
It is an extension of Lewis structures to describe bonding in chemical species.The resonance structures also include the fractional charges present on the atom .They are capable of of depicting delocalized electrons which are unable to be depicted by single Lewis structure.
Molecules with extended pi system are well defined by resonance hybrids.It is a way of giving description of bonding in certain molecules.When there is passage of electrons through pi structures which are opposing ,resonance occurs.
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A 1.0 kg ball is thrown into the air and initial velocity of 30 mi./s how high into the air did the ball travel
Answer:
45.9m
Explanation:
Given parameters:
Mass of the ball = 1kg
Initial velocity = 30m/s
Unknown:
Height the ball will travel = ?
Solution:
At the maximum height, the final velocity of the ball will be 0;
Using ;
V² = U² - 2gh
V is the final velocity
U is the initial velocity
g is the acceleration due to gravity
h is the height
0² = 30² - (2 x 9.8 x h)
0 = 900 - 19.6h
h = 45.9m
Which of the following is NOT a compound?
Table salt
Carbon dioxide
Water
Gold
Answer: Gold.
Explanation: Water, CO2, and table salt are compounds. They are composed of two or more separate elements; a mixture, where as gold is neither.
How does the following equation demonstrate the law of conservation of mass? 22 + 2 → 22
A. The number of atoms of each element is the same on the reactant side as the product side.
B. The number of atoms on the reactant side is more than the number of atoms on the product side.
C. The number of water molecules is the same on the reactant and product side.
D. The number of atoms on the reactant side is less than the number of atoms on product side.
Answer:
A. The number of atoms of each element is the same on the reactant side as the product side.
Explanation:
The equation demonstrates the law of conservation of mass in such a way that the number of atoms of each element is the same on the reactant side as the product side.
According to the law of conservation of mass "matter is neither created nor destroyed in a chemical reaction but they are changed from one form to another".
By virtue of this, the number of moles of atoms on both sides of the expression must be the same.Which equation is balanced in an acidic solution?
Answer:
I think C but it could be D
Explanation:
I would say go for C
Meiosis goes through 2 divisions to create four unique haploid cells. true or false
Answer:
True
Explanation:
True is the ANSWER.
9) Given the reaction: N2(g) + O2(g) + 182.6 kJ → 2 NO(g) What is the heat of formation of nitrogen (II) oxide in kJ/mole? A) AH = -182.6 B) AH = -91.3 C) AH = 91.3 Show D) AH = 182.6
PLEASE HELP please
The heat of formation of nitrogen (II) oxide : +91.3 kJ/mol
Further explanationGiven
Reaction
N2(g) + O2(g) + 182.6 kJ → 2 NO(g)
Required
The heat of formation
Solution
In the above reaction, the heat of the reaction is located on the reactant side which indicates that the formation of nitric oxide requires heat (endothermic reaction).
In the above reaction the heat required to form 2 moles of NO, so the heat required for each mole is:
+182.6 kJ : 2 = =+91.3 kJ/mol
Which of the following is true about the electron configurations of the noble gases?
A) The highest occupied s and p shells are completely filled.
B) The highest occupied s and p shells are partially filled.
C) The electrons with the highest energy are in a d sublevel.
D) The electrons with the highest energy are in an f sublevel.
Which statement describes a digital signal used to store information
Answer:
it is 1,4
Explanation:
Just took the test hope you get it right. c:
Answer:
It is made of numbers
Explanation:
Found the hard way.
A heterogeneous mixture that has very small dispersed particles and stays mixed for a long time is a____. it for science class
The discovery of protons and electrons most directly refuted or replaced the idea that
a. atoms contain a nucleus
b. the atom resembles plum pudding
c. the atom is electrically neutral
d. the atom is indivisible
What is formed when polyatomic ions bond with other ions?
It would be Ionic Compounds.
AYOO SMART PEOPLE I NEED HELP on number 6
Answer:
6.) mixture
8.) compound
Which statement(s) below are correct regarding Rutherford's gold foil experiment? Choose ALL that apply.
a. The atom is mostly empty space
b. The mass and positive charge is concentrated in the center of the atom
c. Atoms contain a nucleus
d. Most alpha particles bounced off of the gold foil
Answer:
A,B,C
Explanation:
Fossils can be found all over the world, often in layered rock formations. To determine the age of the rock layers within an
area, geologists and paleontologists use a technique called radiometric dating. Determining the age of a rock layer allows
scientists to determine the age of the fossils within it.
Some of the more exciting fossil discoveries are of dinosaurs, which existed on Earth between 230 and 65 million years
ago. Examine this map e. Click the map to zoom in, and drag the magnifying glass for a closer look. The map shows
where prehistoric rocks formed during the Triassic, Jurassic, and Crustaceous time periods, the same periods when
dinosaurs walked on Earth. Based on the map, what is the closest location to you where dinosaurs are likely to have lived?
Answer: Western USA.
Answer:
the answer is the question itself
Explanation:
How do you measure density?
Density over mass
Mass over volume
Volume over density
Mass over density
Answer:
Mass over Volume........
Applying a force for a longer time increases the change in
(select all that apply)
Weight
Gravity
Velocity
Mass
Momentum
Answer:
velocity and momentum
Explanation:
as you exert force, the object accelerates, hence, its velocity increases.
since momentum is mass times velocity, the momentum increases too
Please be reminded, this answer may not be 100% correct
When the force should be applied for a long time so it increases the change in velocity and momentum
What is velocity and momentum?The momentum of the object should be equivalent to the object mass times with the object velocity
Here
p = mv
Here p means momentum
m means mass
v means velocity
Here the momentum should be directly proportional to the mass of the object and for the velocity of the object also.
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what volume of a 6.0% W/V glucose (C6H6O6) solution can be prepared using 185g of glucose?
Volume of solution : = 3083.3 ml = 3.0833 L
Further explanationGiven
a 6.0% w/v
185 g of glucose
Required
Volume of solution
Solution
% w/v : the mass of solute in a volume of solution or 1 g solute in 100 ml of solution
Can be formulated :
% w/v = (mass solute(g) : volume solution(ml)) x 100
Mass of solute = mass of glucose = 185 g
The volume of solution :
= 185 g : 0.06
= 3083.3 ml
= 3.0833 L
pleas HELP QUICK!!!!!!!!!!!!!!!!!
Answer: first is last second is first and 3rd is second
Explanation:
Please Help Quick!!!
Lewis Structure of PO3 3-
1. Find its coordination figure/coordination number of central atom (CF)
Ev = Vallence electron of central atom
Σe = electrons donated from substituents
Terminal O gives 0 electrons, hence Σe = 3 x 0
charge = charge of the compound
2. Find EP (electron pairs) and LP (lone pairs)
LP = CF - EP
3. Draw the skeleton with octet substituents (top right figure)
4. Find formal charge for each atoms (Qf)
5. Write formal charge near atom in skeleton
6. Enjoy
photosynthesis uses all of the following except __ to make food ?
im in class rn real school help
Answer:
Weathering involves the use of water and or wind to wear down the environment. The sand dunes were most likely carried by wind to form them and form its shape. Erosion most likely took away parts of the sand to make the sand dune. Deposition most likely deposited sand to the area.
Explanation:
If you possibly want a better explanation, try looking it up :).
#teamtrees #WAP (Water And Plant)
How are gases and liquids different from each other
Answer:
Gases, liquids, and solids are all made up of atoms, molecules, and/or ions, but the behaviors of these particles differ in the three phases. Gas is well separated with no regular arrangement. liquid are close together with no regular arrangement. solid are tightly packed, usually in a regular pattern.
Explanation:
How many atoms of beryllium are equal to 0.39 moles of beryllium?
Answer:
2.35 x 10²³atoms
Explanation:
Given parameters:
Number of moles of Be = 0.39moles
Unknown:
Number of atoms = ?
Solution:
To solve this problem:
1 mole of a substance contains 6.02 x 10²³ atoms
0.39 mole of Be will contain 0.39 x 6.02 x 10²³ = 2.35 x 10²³atoms
what do you mean by calcination??
Answer:
Calcination refers to heating a solid to high temperatures in absence of air or oxygen, generally for the purpose of removing impurities or volatile substances.
Explanation:
hope it helps
The picture below shows the positions of the Earth, Moon, and Sun during an eclipse.
What is true of the eclipse shown in the picture?
A.
It is a lunar eclipse, in which the Earth casts a shadow on the Moon.
B.
It is a solar eclipse, in which the Earth casts a shadow on the Moon.
C.
It is a lunar eclipse, in which the Moon casts a shadow on the Earth.
D.
It is a solar eclipse, in which the Moon casts a shadow on the Earth.
Answer:
it is option c liner eclipse
Answer:
A-It is a lunar eclipse, in which the Earth casts a shadow on the Moon.
If a sample contains 22 moles of CsPO4, what is the mass of that sample?
Answer:
Mass = 5013.36 g
Explanation:
Given data:
Number of moles of CsPO₄ = 22 mol
Mass of sample = ?
Solution:
Formula:
Mass = number of moles × molar mass
Molar mass of CsPO₄ = 132.91×1 + 30.97×1 +16×4 = 227.88 g/mol
by putting values,
Mass = 22 mol × 227.88 g/mol
Mass = 5013.36 g
if you heat a liquid measure the temperature to which it boils what am I measuring
How many moles are in 8.63 x 103 atoms of Li?
1.43 × 10⁻²⁰ mol Li
General Formulas and Concepts:Math
Pre-Algebra
Order of Operations: BPEMDAS
Brackets Parenthesis Exponents Multiplication Division Addition Subtraction Left to RightChemistry
Atomic Structure
Using Dimensional AnalysisAvogadro's Number - 6.022 × 10²³ atoms, molecules, formula units, etc.Explanation:Step 1: Define
8.63 × 10³ atoms Li
Step 2: Identify Conversions
Avogadro's Number
Step 3: Convert
Set up: [tex]\displaystyle 8.63 \cdot 10^3 \ atoms \ Li(\frac{1 \ mol \ Li}{6.022 \cdot 10^{23} \ atoms \ Li})[/tex]Multiply/Divide: [tex]\displaystyle 1.43355 \cdot 10^{-20} \ moles \ Li[/tex]Step 4: Check
Follow sig fig rules and round. We are given 3 sig figs.
1.43355 × 10⁻²⁰ mol Li ≈ 1.43 × 10⁻²⁰ mol Li
What is the percent by mass of Nitrogen in Mg(NO3)2?
Answer:
18.888%
Explanation:
Turning on your X-Box is an example of___ energy turning into ___ energy.
A.electrical,nuclear
B.nuclear,sound
C.electrical,light
D.electrical,chemical
Answer:
electrical --> light
Explanation: