Answer:
a. ½O2
b. O2
c. 3O2
d. 6O2
Explanation:
Hello!
In this case, since balancing chemical reactions can be attained by adding coefficients prior to each species in the chemical equation, we infer that the following representations are correct because they have a coefficient and the molecule O2 as diatomic oxygen:
a. ½O2
b. O2
c. 3O2
d. 6O2
It means that e. and f. are wrong because even when they have the coefficient, the molecule O2 is not properly written.
Best regards!
The correct representations of O2 and its coefficient are: ½O2, O2, 3O2, 6O2.
Oxygen molecule O2 exists as a diatomic molecule that comprises two atoms chemically bonded together.
When oxygen undergoes a chemical reaction with other compounds, the diatomicity of oxygen O2 is still usually maintained.
The coefficient of oxygen O2 varies depending on the reaction in which oxygen undergoes such as:
combustion reaction with alkanes,the reaction of iron with oxygen O2, reaction with magnesium etc.An oxygen molecule does not exist as 3O and 5O3 represent a reaction of ozone.
Therefore, we can conclude that the correct representations of O2 and its coefficient are: ½O2, O2, 3O2, 6O2.
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What is ATP? How does it provide energy
what three things might influence a slide when conditions are right?
Answer:
3
Explanation:
The three things that can affect a condition to enforce a slide is friction, weight, and slope of an area. Solutions that can make flow easily are those that can create less friction depending on the condition of an environment where it is present.
The density of mercury is 13.6 g/cm'. How many quarts does 83.0 g of Hg occupy? (1 L=1.06 qt)
Answer:
0.0064 qt
Explanation:
Given data:
Density of mercury = 13.6 g/cm³
Mass of mercury = 83.0 g
How many quarts mercury have = ?
Solution:
First of all we will calculate the volume in cm³.
d = m/v
13.6 g/cm³ = 83.0 g / volume
Volume = 83.0 g / 13.6 g/cm³
Volume = 6.1 cm³
cm³ to L:
6.1 cm³ × 1 L / 1000 cm³
0.0061 L
In quarts:
1 L = 1.06 qt
0.0061 L × 1.06 qt / 1 L
0.0064 qt
Calculate the molar mass of NH4NO3.
molar mass of NH4NO3 =
g/mol
Answer:
67g/mol
Explanation:
The given compound is:
NH₄NO₃ :
Problem here is to find the molar mass of the compound.
Now;
The molar mass is the sum of the atomic masses of the elements in the compound.
Atomic mass of N = 14g
Atomic mass of H = 1g
Atomic mass of O = 16g
So;
Molar mass = 14 + 4(1) + 1 + 3(16) = 67g/mol
Answer:
the answer is 80.0 grams per mole
Explanation:
Identify the two ways that rocks are broken down into smaller pieces?
A
abrasion and erosion
B
deposition and erosion
C
physical weathering and deposition
D
physical weathering and chemical weathering
answer pleaseeeeeeeee i only have one minute
Answer:
A or C
Explanation:
Answer: It is D.
Explanation: Edge 2021
is a planar carbon "backbone" possible for propane? Explain.
Is a planar carbon "backbone" possible for cyclopropane? Explain.
Answer:
Cyclopropane has a planar carbon back bone while propane does not
Explanation:
We have to recognize that in straight chain saturated organic compounds, carbon atoms have a tetrahedral geometry. Each carbon atom is bonded to four other atoms.
However, carbon atoms in cyclic compounds are also sp3 hybridized with each carbon bonded to only four other atoms but the ring system is highly strained.
Cyclopropane is a necessarily planar molecule with a bond angle that is far less than the expected tetrahedral bond angle due to strain in the molecule. Hence, the carbon atoms may have have a "planar backbone".
how do you think you can use lenses and mirrors to change the direction and intensity of a light wave?
A canister containing air has a volume of 85 cm3 and a pressure of 1.45 atm when the tenoerature is 310 k. What is the pressure when the volune is increased to 180 cm3 and the temeprarje is reduced to 280 k?
Answer:
Pressure = 0.62 atm
Explanation:
[tex]V_{1}[/tex] = 85 [tex]cm^{3}[/tex], [tex]P_{1}[/tex] = 1.45 atm, [tex]T_{1}[/tex] = 310 K, [tex]V_{2}[/tex] = 180 [tex]cm^{3}[/tex], [tex]T_{2}[/tex] = 280 K.
Applying the general gas law,
[tex]\frac{P_{1} V_{1} }{T_{1} }[/tex] = [tex]\frac{P_{2} V_{2} }{T_{2} }[/tex]
[tex]\frac{1.45*85}{310}[/tex] = [tex]\frac{P_{2}*180 }{280}[/tex]
[tex]P_{2}[/tex] = [tex]\frac{1.45*85*280}{180*310}[/tex]
= [tex]\frac{34510}{55800}[/tex]
= 0.62
[tex]P_{2}[/tex] = 0.62 atm
The pressure when the volume is increased and the temperature reduced to the given values is 0.62 atm.
An increase in aurora activity on Earth could be related to what activity on the Sun?
O A decrease in prominence
B decrease in solar Fares
Oc decrease in speed of solar wind
D increase in speed of solar wind
E increase in sun spots
Answer:
D.
Explanation:
INCREASE OF SOLAR WINDS When the sun is more active
Imformation you find on the periodic table
Answer:
Within each element square, information on the element's symbol, atomic number, atomic mass, electronegativity, electron configuration, and valence numbers can be found. At the bottom of the periodic table is a two row block of elements that contain the lanthanoids and actinides.
Explanation:
A dolphin travels a distance 20 miles up the coastline in 153 minutes. If 1 mile is equal to
1609 meters, then what is the dolphin's average speed in meters/second rounded to the
nearest tenth?
+/-
HELP ME PLEASE
Answer:
3.51m/s
Explanation:
Given parameters:
Distance = 20miles
Miles to meters:
1 mile = 1609m
20miles = 20 x 1609 = 32180m
Time = 153minutes
1 min = 60s
153min = 60 x 153 = 9180s
Unknown:
Average speed = ?
Solution:
To solve this problem;
Average speed = [tex]\frac{distance }{time taken}[/tex]
Average speed = [tex]\frac{32180}{9180}[/tex] = 3.51m/s
Homogeneous mixtures have components that are unevenly spaced throughout true or false
Answer:
False
Explanation:
Mixtures are impure substances.
There are two types of mixtures based on the number of coexisting phases.
Homogeneous mixtures have their constituents existing in one single phase. The components are evenly spaced.
Heterogeneous mixtures have their constituents existing in at least two different phases. Therefore, they are unevenly spaced due to the phases present within the mixture.
In table below, there are descriptions of an experiment on samples of three different chemical compounds. Decide whether the compound is ionic or molecular, if you can. If there is not enough information to decide, choose can't decide in the third column.
compound description lonic or molecular?
1 Compound 1 is a yellow-white solid. When heated to melting, it forms an oily yellow liquid, which is a good electrical insulator.
2 Compound 2 is a hard grayish-white solid. A small 250 mg sample of it is put into a quartz tube and heated strongly. It starts to melt at 1055. °C.
3 Compound 3 is a yellow solid made up of clusters of needle-like crystals. It's a good electrical insulator when solid, but if crushed and dissolved in water, the solution is a good conductor.
Answer:
Compound 1- molecular solid
Compound 2- ionic solid
Compound 3- ionic solid
Explanation:
An ionic solid has a high melting point and does not conduct electricity in solid state. Rather, it's solution or melt is a good electrical conductor.
On the other hand, a molecular solid is a poor conductor of electricity. It has a low melting point and does not easily dissolve in water.
What is homologous series. write the example.
The pressure exerted by the atmosphere at sea level is 14.7 Libs per square inch how many pounds of force are pressing on a rectangle with an area of 76.3cm^2
Pounds of force pressing on a rectangle : F = 173.86 lbs
Further explanationGiven
P at sea level = 14.7 lbs/in²
Area of rectangle : A = 76.3 cm²
Required
Pounds of force
Solution
P = F/A
F= P.A
Conversion :
1 cm² = 0.155 in²
76.3 cm² = 11.827 in²
Input the value :
F = 14.7 lbs/in² x 11.827 in²
F = 173.86 lbs
Decide whether the compound is ionic or molecular, if you can.
A Compound is a deep red solid with a noticeable unpleasant smell. It dissolves slightly in water, and a solution of in of water doesn't change the electrical conductivity of the water.
Answer:
Molecular solid
Explanation:
A molecular solid has a low melting point, they are soft and do not conduct electricity.
We have been told in the question that the solid does not really dissolve in water and it's solution does not improve the electrical conductivity of water. Hence, it must be a molecular solid.
A chemist adds 600.0mL of a 0.444/gL calcium sulfate CaSO4 solution to a flask. Calculate the mass in grams of calcium sulfate the chemist has added to the flask. Be sure your answer has the correct number of significant digits.
Answer:
0.266 grams of calcium sulfate
Explanation:
We can calculate the mass of calcium sulfate added using the given volume and concentration of the solution:
First we convert 600.0 mL to L ⇒ 600.0 mL equals 0.6000 L (600 ÷ 1000).
0.444 g/L * 0.6000 L = 0.266 g
Thus the answer is 0.266 grams of calcium sulfate.
What is the empirical formula of a compound whose percentage composition is found to be 62.60% lead, 8.40% nitrogen, and 29.0% oxygen?
Answer:
PbN₂O₆
Explanation:
Empirical formula is the simplest formula of a compound.
To find the empirical formula, we use the system below:
Lead Nitrogen Oxygen
Percentage
Composition 62.6 8.4 29
Molar mass 207.2 14 16
Number of
Moles 62.6/207.2 8.4/14 29/16
0.302 0.6 1.813
Divide by the
smallest 0.30/0.302 0.6/0.302 1.813/0.302
1 2 6
Empirical formula is PbN₂O₆
The empirical formula of the compound containing 62.60% lead, 8.40% nitrogen, and 29.0% oxygen is PbN₂O₆ or Pb(NO₃)₂
From the question given above, the following data were obtained:
Lead (Pb) = 62.60%
Nitrogen (N) = 8.40%
Oxygen (O) = 29.0%
Empirical formula =?The empirical formula of the compound can be obtained as illustrated below:
Divide by their molar mass
Pb = 62.60 / 207 = 0.302
Nitrogen (N) = 8.40 / 14 = 0.6
Oxygen (O) = 29.0 / 16 = 1.8125
Divide by the smallest
Pb = 0.302 / 0.302 = 1
Nitrogen (N) = 0.6 / 0.302 = 2
Oxygen (O) = 1.8125 / 0.302 = 6
Thus, the empirical formula of the compound is PbN₂O₆ or Pb(NO₃)₂
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How much volume (in cm3) is gained by a person who gains 12.3 lb of pure fat?
Answer:
So we are given with the mass while we are asked for the amount of volume. So this means, we must need an information on the density. From literature, the density of human fat is 0.918 g/cm³. Convert grams to lb by the conversion that 1,000 g = 2.2 lbs.
Density = 0.918 g/cm³ * (2.2 lbs/1,000 g) = 0.0020196 lb/cm³
Volume = Mass/Density = 12.2 lb / 0.0020196 lb/cm³
Volume = 6,040.8 cm³
HELPPPPPPPPPP/AYUDAAAAAA
Answer:
*helps*
Explanation:
A student working in the laboratory produces 6.81 grams of calcium oxide, CaO, from 20.7 grams of calcium
carbonate, CaCO3, according to the reaction CaCO3 → CaO + CO2. Calculate the theoretical yield and
the percent yield for the reaction. Show and/or explain your work.
Answer:
CaC
O
3
--------> CaO + C
O
2
20.7 g 6.81g +
As per the law of Conservation of mass , in any chemical reaction, the total mass of products is equal to the total mass of the reactants.
mass of C
O
2
+ mass of CaO is equal to the mass of CaC
O
3
.
mass of C
O
2
+ 6.81g = 20.7g
mass of C
O
2
= 20.7g- 6.81g = 13.89g
% yield of a Product Z = mass of product Z x 100 / mass of reactant
% yield of Product C
O
2
= 13.89 x 100 / 20.7 = 67. 10%
% yield of Product CaO = 6.81g x 100 /20.7 = 32.89%
Explanation:
:)
Most organic compounds are made of just four elements.
What are they?
Answer:
hydrogen, carbon, oxygen and nitrogen
Explanation:
Most organic compounds are made up of the four elements: hydrogen, carbon, oxygen and nitrogen.
Most organic compounds are made of just four elements are hydrogen, carbon, oxygen and nitrogen.
What do you mean by an organic compound ?The term organic compound is defined as a substance that contains covalently - bonded carbon and hydrogen and often with other elements.
Benzoic acid, aromatic compounds, benzoic aldehyde, propanoic acid, butanoic acid, malonic acid, amines, heterocyclic compounds, VOC, benzoic acid, and diethyl malonate are some examples of organic compounds.
Carbohydrates, lipids, proteins, and nucleotides are all organic compounds that are required for human function. Because they contain both carbon and hydrogen, these compounds are classified as organic.
Thus, Most organic compounds are made of just four elements are hydrogen, carbon, oxygen and nitrogen.
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What is the mollusk tongue called?
B
Answer:
why
Explanation:
B is the answer to the question
anybody?i will appreciate it
Answer:
fat provide 9 calories per gram
An ionic compound contains 2 potassium cations for every 1 oxygen anion. What is the chemical formula of the compound?
Answer:
Chemical formula of the compound = K₂O
Explanation:
Given:
Number of potassium cation = 2
Number of oxygen anion = 1
Cross valency
Symbol of potassium = k
Symbol of oxygen = o
So;
Chemical formula of the compound = K₂O
Can you please help me
Shure what you need help with
Which compound has the greatest molecular mass?
CO2
H2O
Pb2
NH4
How do atoms form double or triple covalent bonds?
Answer:
Covalent bonding occurs when electrons are shared between atoms. Double and triple covalent bonds occur when four or six electrons are shared between two atoms, and they are indicated in Lewis structures by drawing two or three lines connecting one atom to another.
Explanation:
Why do balls bounce higher on hard floors than on carpet?
a) They don't. That is a myth.
b) The carpet friction creates thermal energy.
c) The carpet fibers attract the molecules in the ball.
d)The carpet is so nice and soft the ball doesn't want to go.
Answer:
I'm pretty sure c......
Answer is B
The friction causes the ball to lose energy on carpets, which makes the ball bounce less. On hard floors, not as much thermal energy is lost, which is why it bounces higher.
1. The following equation represents the reaction between sodium and water.
2Na(s) + 2H20(1) - 2NaOH(aq) + H2(g)
During this reaction, water is acting as ...
A)an acid and an oxidant
B)an acid and a reduc tant
C)an oxidant only
D)an acid only