Answer:
A). 92.02g
Explanation:
Equation of the reaction;
N2 (g)+ 2O2(g)------> 2NO2(g)
Note that the balanced reaction equation is the first step in solving any problem on stoichiometry. Once the reaction equation is correct, the question can be easily solved.
Reaction of one mole of nitrogen gas with two moles of oxygen gas yields two moles of nitrogen dioxide.
Mass of two moles of nitrogen dioxide= 2[14 + 2(16)] = 2[14+32]= 2[46]= 92 gmol-1
Therefore; Mass of two moles of nitrogen dioxide is 92
The chemical formula of a compound describes the elements the compound contains and the
A.pH of the compound.
B.conduction of the compound.
C.ratio of elements in the compound.
D.ratio of neutrons to protons in each element.
Answer:
C.ratio of elements in the compound.
Explanation:
A compound is a substance that constitutes two or more elements in a defined proportion. A chemical compound is different from another compound in what it contains i.e. elements. A chemical formula shows the elements contained in a specific compound. For example, the chemical formula of sodium chloride (NaCl) shows us that it contains Sodium (Na) and Chlorine (Cl) elements as represented by symbols.
In addition to this, a chemical formula also shows the ratio of each element that makes up the compound. An element can have more than one atom in a compound. For example, CaCl2 is the chemical formula for Calcium chloride and it shows is that the ratio of Calcium (Ca) to Chlorine (Cl) is 1:2.
The correct answer is C, the ratio of elements in the compound.
Compound:-
A compound is a substance that constitutes two or more elements in a defined proportion. A chemical compound is different from another compound in what it contains i.e. elements.
Chemical formula:-It shows the elements contained in a specific compound. For example, the chemical formula of sodium chloride (NaCl) shows us that it contains Sodium (Na) and Chlorine (Cl) elements as represented by symbols. A chemical formula also shows the ratio of each element that makes up the compound. An element can have more than one atom in a compound. For example, [tex]MgCl_2[/tex] is the chemical formula for Magnesium chloride and it shows that the ratio of Magnesium to Chlorine (Cl) is 1:2.Hence, the correct answer is C.
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When balanced, which equation would have the coefficient 3 in front of any of the reactants? Zn + HCl ZnCl2 + H2 H2SO4 + B(OH)3 B2(SO4)3 + H2O Fe + AgNO3 Fe(NO3)2 + Ag C2H4O2 + O2 CO2 +H2O
Answer:
b
Explanation:
i got it right on edge
To balance a reaction means to make the number of atoms the same on both the reactants and products side. The steps for balancing is as follows:-
Balance the Metal firstThen balance the HydrogenBalance the oxygen at lastAccording to the question, there are third reactions. the reaction third has the 3 coefficient before the compound.
The balanced reaction is as follows:-
[tex]3H_2So_4 + 2B (OH)_3------->B_2(So_4)_3 + 6H_2O[/tex]
Hence the correct compound is[tex]3H_2SO_4[/tex].
For more information, refer to the link:-
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Q24. List all of the ways you can force the reaction to shift to the product 5 points
side. (There are 5 ways total)
Answer:
1) Increase temperature
2) Decrease temperature
3) Increase concentration of reactants
4) Increase pressure
5) Decrease pressure
Explanation:
Le Chatelier's Principle Fundamentals states that a chemical reaction at equilibrium that undergoes changes to pressure, temperature, or concentration, this will cause the equilibrium to shift in the opposite direction to offset the change.
1) Increase temperature
2) Decrease temperature
3) Increase concentration of reactants
4) Increase pressure
5) Decrease pressure
Unscramble the following words to form a complete sentence about the cycles of nature:
limited is through environment Matter recycled the on Earth is and
Answer: idk I have that question too , sorry to get ur hopes up high thinking this was an answer. PERIOTTTT
Explanation:
When electrons are filling energy levels, the lowest energy sublevels are
occupied first. This is
A. None of these
B. The Aufbau principle
C. Hund's rule
D. Conservation of energy
Reset Selection
Which statement describes a periodic trend of first ionization energy?
O A. It tends to decrease from left to right across a period.
B. It remains the same within a period.
O C. It tends to increase from top to bottom of a group.
D. It tends to decrease from top to bottom of a group.
Answer:
D
Explanation:
when ionic radius gets bigger, the valence electron is repelled further away from the nucleus due to higher number of principal quantum shells. it experiences less electrostatic forces of attraction with the nucleus and requires less energy to remove.
22.00 g of CO2 has a volume of 50.00 L and a pressure of 0.8210 atm. What must be the
temperature of the gas?
Answer:
T = 9.875K
Explanation:
The ideal gas Law is PV = nRT.
P = Pressure
V = Volume
n = amount of substance
R = 8.314 J/(K. mol)
T = Temperature in Kelvin
22g CO2
CO2 Molar Mass = 44g/mol
C = 12g/mol
O = 16g/mol
P = 0.8210atm
V = 50L
PV = nRT
0.8210 x 50 = 8.314 x 0.5 x T
41.05 = 4.157T
T = 41.05/4.157
T = 9.875K
Which molecule is butyne?
Answer:
The answer is B.
Explanation:
A P E X
Baking soda, NaHCO3, can be commercially produced during a series of chemical reactions called the Solvay process. In this process, NH3(aq), NaCl(aq), and
other chemicals are used to produce NaHCO3(s) and NH Cl(aq).
To reduce production costs, NH3(aq) is recovered from NHCl(aq) through a different series of reactions. This series of reactions can be summarized by the
overall reaction represented by the unbalanced equation below.
NHACH(aq) + Ca(s) - NH3(aq) + H20() + CaCl(aq)
Balance the equation below for the overall reaction used to recover NH3(aq), using the smallest whole-number coefficients.
Answer:
CaO(s) + 2NH4Cl(aq) -------> CaCl2(aq) + H2O(l) + 2NH3(g)
Explanation:
The solvay process is an important process in the chemical industry. In this process, ammonia gas is first dissolved in concentrated brine to form a mixture known as ammoniacal brine. This solution is made to trickle down the tower. A counter stream of carbon dioxide is forced up the tower. The two substances react to form sodium hydrogen trioxocarbonate IV. This substance is only slightly soluble and separates out as a solid sludge. The product is now dried and heated to give sodium trioxocarbonate IV.
The overall reaction of the process can be given as;
CaO(s) + 2NH4Cl(aq) -------> CaCl2(aq) + H2O(l) + 2NH3(g)
Calcium chloride is merely a by-product.
Answer:
Based on Reference Table F, which solution will contain the highest concentration of
iodide ions?
A
lead iodide
silver iodide
mercury (II) iodide
iron (11) iodide
In 450 BCE, Greek philosopher Democritus first thought of the existence
of tiny particles that compose everything around us. He named them
'atomos', meaning
A. Invisible
B. Particle
C. Indivisible
D. None of these
Reset Selection
Answer:
A. Invisible
Explanation:
Answer: Indivisible
Explanation: There was a brilliant philosopher named Democritus, and he proposed the Greek word atomos, which means uncuttable.
Synonyms for uncuttable are as follows:
Joined, inseparable, Indivisible, unbreakable, irreducible, impenetrable, unalterable, indissoluble, unified, permanent, immutable and unchangeable.
Why other answers are wrong:
I simply believe the other user may have had a minor typo which caused such confusion. Who knew one letter could effect an answer that much XD
what is the effect of deforestation on quantity of oxygen gass?
Answer:
There is less oxygen because there are less trees to produce it.
Answer:
There will be less oxygen for us to breathe
Explanation:
This is because trees produce oxygen when they do photosynthesis and without as many trees we get less and less oxygen produced
Any moving object has _______________ energy A.kinetic B.potential C.gravitational potential
Answer:
Kinetic
Explanation:
potential means it has the POTENTIAL to move, gravitational potential energy is when an object isn't moving but the it turns into gravitational kinetic energy since gravity causes it to move. since the object in question is already in motion it proves kinetic energy as the answer.
Compounds formed when non-metals react with metals consist of particles called ionic compound
Which of the following always occurs in a
chemical reaction?
A) a gas is given off.
B) a solid is produced,
C) a new substance is produced.
D) a colour change takes place.
Answer:
C
Explanation:All the other answers are wrong
Horned animals have different sizes of horns. The size of their horns can affect their ability to
compete for a mate or provide protection from predators,
What is this an example of?
overproduction
O variation
survival of fit individuals
Answer:
survival of fit individuals
Explanation:
I believe its survival of fit individuals because the animals with different horns are going to be able to find a mate or provide better depending on their horn and its kind of like natural selection in the sense those who have genetically better (??) horns are more likely to survive. Hope it helps but it might be a little bit of a confusing explanation.
Answer:
variation
Explanation:
survival of the fittest, is more like, "out of 3 people only 1 makes it"
^ so the other guy is wrong.
Need help, thank you!
Answer:
B the answer is B thank you
When may a scientific theory be revised?
Answer:
it can be revised at any time.
Explanation:
Answer: Multiple answers to this question. This is what I comprehend.
Explanation:
Upon analysis of the results, a theory can be rejected or modified, but it can never be proven to be correct 100 percent of the time. For example, relativity has been tested many times, so it is generally accepted as true, but there could be an instance, which has not been encountered, where it is not true.
At a party, you see someone on the floor with grayish skin, having
trouble breathing. This could be a sign of:
AN ALCOHOL OVERDOSE
AN OPIOID OR DEPRESSANT OVERDOSE
A STIMULANT OVERDOSE
ALL OF THE ABOVE
A person having trouble breathing could be a sign of
d. All of the above(alcohol overdose, depressant overdose, or stimulant overdose)
Causes of trouble breathing:Most instances of windedness are because of heart or lung conditions. These organs are engaged with shipping oxygen to your tissues and removing carbon dioxide, and issues with both of these cycles influence your relaxation.
At a party, if a person feels trouble breathing then it can be due to an alcohol overdose, depressant overdose, or stimulant overdose.
Thus, option D is correct.
Find more information about Breathing here:
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Where are you likely to find Safety Data Sheets at the client site? (choose the
best 2 options)
On the computer as an electronic file
In a work area where the chemicals are stored or used
In the manager's office
In the lobby area
2 Points
Which separation technique involves heating the components of a solution to
their boiling points?
A. Separation by distillation
B. Separation by density
C. Separation by chromatography
D. Separation by melting point
Answer:
D. Separation by melting point
Answer:
SEPARATE BY DESTILATION
Explanation: just did the test
A student decreases the temperature of a 417 cm³ balloon from 278 K to 231 K. Assuming constant pressure, what should the new volume of the balloon be?
376 cm³
417 cm³
462 cm³
924 cm³
Answer:
346.5 cm³ or 347cm³
Explanation:
v1/T1 = v2/T2
417/278 = v2/231
v2 = 346.5 cm³
What volume of 10,0 M H2SO4 is required to prepare 4.0 L of 0.50 M H2SO4?
A) 0.20 L
B) 0.40 L
C) 0.50 L
D) 1.0L
E) 4.0L
Answer: A) 0.20 L
Explanation:
Molarity of a solution is defined as the number of moles of solute dissolved per Liter of the solution.
According to the neutralization law,
[tex]M_1V_1=M_2V_2[/tex]
where,
[tex]M_1[/tex] = molarity of stock [tex]H_2SO_4[/tex] solution = 10.0 M
[tex]V_1[/tex] = volume of stock [tex]H_2SO_4[/tex] solution = ?
[tex]M_2[/tex] = molarity of dilute [tex]H_2SO_4[/tex] solution = 0.50 M
[tex]V_2[/tex] = volume of dilute [tex]H_2SO_4[/tex] solution = 4.0 L
[tex]10.0\times V_1=0.50\times 4.0[/tex]
[tex]V_1=0.20L[/tex]
Therefore, the volume of 10.0 M [tex]H_2SO_4[/tex] solution needed to prepare 4.0 L of 0.50 M [tex]H_2SO_4[/tex] is 0.20 L
Acid, Base, or Saft?
USE THE ARRHENIUS DEFINITION TO CLASSIFY IF THE SUBSTANCE IS AN ACID, BASE, OR SALT
» MgF2
» H2SO4
Answer:
MgF2 - Salt
H2SO4 - Acid
Explanation:
Arrhenius Definition
Arrhenius acid is a substance that dissociates in water to form hydroxide (H+) ions.
Arrhenius base is a substance that dissociates in water to form hydroxide (OH–) ions.
H+
OH-
S2-
O2-
MgF2 - Salt as no Hydrogen
H2SO4 - Acid as converts to HSO4- and H+ upon dissociation in water.
What are orbitals?
A. Energy levels occupied by neutrons
B. Areas within an energy level that are occupied by electrons
C. Regions of the atom that contain protons
D. Circular paths around the nucleus
Answer:
B. Areas within an energy level that are occupied by electrons
Explanation:
Its not A because there are different orbitals on each energy level.
Answer:
B
Explanation:
what is the formula for S5O3
