Answer:
Explanation:
For one B2 molecule 3 A2 molecules are reacting means,
the ratio is 1:3
Out of 126 molecule = 126/3 =42 molecules are required for the reaction,
therefore the 54-42= 10 molcules of B2 will reamin in the end of reaction.
Which animal group actually saw a drop in the number of endangered and threatened species between 1995 and 2005?
a Fish
b. Reptiles
c. Birds
d. Mammals
Answer:
Mammals
Explanation:
Write the equilibrium expression for the following reaction. Based upon the value of K, would you expect more or less product to be in the equilibrium mixture? Why?
Answer:
1. K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. More products are obtained at equilibrium since the equilibrium constant is very large.
Explanation:
1. Determination of the expression for the equilibrium constant, K.
The equilibrium constant, K for a given reaction is simply the ratio of concentration of the products raised to their coefficient to the concentration of the reactants raised to the coefficient.
The balanced equation for the reaction is given below:
CaO(s) + CH4(g) + 2H2O(g) —> CaCO3(s) + 4H2(g)
Therefore, the equilibrium constant, K for the above equation is:
K = [CaCO3] [H2]⁴/ [CaO] [CH4] [H2O]²
2. From the question given, the equilibrium constant is 2344.
Since the equilibrium constant is very large, it therefore means that more product are obtained at equilibrium.
What is an alloy? A. A substitution of one metal for another metal B. A metal with a changed oxidation state C. A combination of metal with another element D. A layering of one metal over another metal
The correct answer is the combination of a metal with another element.
An alloy is a combination of two or more metallic elements to make a stronger material. For instance, there are bronze alloys, brass alloys, and coin alloys.
We can confirm that an alloy is a combination of one metal with another metal because stainless steel is made of an iron and chromium alloy (iron is a metal; chromium is also a metal). Therefore, we can confirm that option C is the best choice.
1. Convert 0.00006125 to scientific notation
Answer:
6.125 × 10^-5
Explanation:
You have to move the decimal place 5 times to the right. Remember in scientific notation the first number, (the number that comes before the 10) has to be between 1.0 and 9.99...
41. Which pair of compounds could combine to produce an ester?
I. CH3- CH2 - CH2 - CH3
II. CH3- CH2 - CH2-CH2-OH
III. CH3- CH2 - CH2-COOH
IV. CH3- CH2- CH2- COH
a. I and II
b. II and III
c. II and IV
d. III and IV
Answer: b. ii and iii
Explanation:
The ester, Butyl Butanoate is formed when Butanol reacts with Butanoic acid
as seen below;
CH3-CH2-CH2-CH2-OH + CH3-CH2-CH2-COOH ---->
Butanol Butanoic acid
CH3-CH2-CH2-COOCH2-CH2-CH2-CH3 + H2O
Butyl Butanoate Water
Does a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together? Write the net ionic equation.
Answer : Yes, a precipitate form when a solution of calcium chloride and a solution of mercury(I) nitrate are mixed together.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Explanation :
In the net ionic equations, we are not include the spectator ions in the equations.
Spectator ions : The ions present on reactant and product side which do not participate in a reactions. The same ions present on both the sides.
The given balanced ionic equation will be,
[tex]CaCl_2(aq)+2HgNO_3(aq)\rightarrow Ca(NO_3)_2(aq)+Hg_2Cl_2(s)[/tex]
The ionic equation in separated aqueous solution will be,
[tex]Ca^{2+}(aq)+2Cl^{-}(aq)+2Hg^{+}(aq)+2NO_3^{-}(aq)\rightarrow Hg_2Cl_2(s)+Ca^{2+}(aq)+2NO_3^{-}(aq)[/tex]
In this equation, [tex]Ca^{2+}\text{ and }NO_3^-[/tex] are the spectator ions.
By removing the spectator ions from the balanced ionic equation, we get the net ionic equation.
The net ionic equation will be,
[tex]2Hg^{+}(aq)+2Cl^{-}(aq)\rightarrow Hg_2Cl_2(s)[/tex]
Taking into account the definition of net ionic equation, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
The net ionic equation is a chemical equation for a reaction that lists only the species that participate in the reaction.
In other words, an ionic equation is a chemical equation where electrolytes in aqueous solution are written as dissociated ions. Usually this is a salt dissolved in water, where the ionic species are followed by (aq) in the equation, to indicate that they are in aqueous solution.
The balanced equation will be:
CaCl₂(aq) + 2 HgNO₃(aq) → Ca(NO₃)₂(aq) + Hg₂Cl₂(s)
where (aq) means aqueous and (s) solid.
Taking into account that:
All Cl⁻, Br⁻ and I⁻ salts are soluble. All salts of NO₃⁻, C₂H₃O₂⁻, ClO₃⁻ and ClO₄⁻ are soluble.The total ionic equation in separated aqueous solution will be:
Ca²⁺(aq) + 2Cl⁻(aq) + 2 Hg⁺(aq) + 2NO₃⁻(aq) → Ca²⁺ + 2NO₃⁻(aq) + Hg₂Cl₂(s)
A spectator ion is an ion that appears both as a reactant and as a product in an ionic equation.
Spectator ions can be either cations (positively charged ions) or anions (negatively charged ions).
When writing a net ionic equation, spectator ions found in the original equation are ignored. Thus, the total ionic reaction is different from the net chemical reaction.
In this case, Ca²⁺ and NO₃⁻ are the spectator ions because they appear unchanged in both the product and the reagent. So these ions cancel out by writing the net ionic equation and you get:
2Cl⁻(aq) + 2 Hg⁺(aq) → Hg₂Cl₂(s)
Since Hg₂Cl₂ is an insoluble salt, it will precipitate.
Finally, a precipitate of Hg₂Cl₂ is formed when a calcium chloride solution and a mercury (I) nitrate solution are mixed.
Learn more:
https://brainly.com/question/18896765?referrer=searchResultshttps://brainly.com/question/10553963?referrer=searchResultshttps://brainly.com/question/7018960https://brainly.com/question/24099019?referrer=searchResultshttps://brainly.com/question/10538922?referrer=searchResultsInitial temperature of metal =
С
Initial temperature of water =
°C
Final temperature of both =
Answer:
52.0 °C
Explanation:
7. Do you have any reservations about taking this course? Explain. How can I help?
I dont understand what it means by reservations
please help I just started this and I'm already stressed out
Answer:
Reservations means to say, are there any thoughts you have about this course that are negative. And what can your teacher do to help you excel, or succeed in this course. Good luck to you, and remember to take deep breathes when you need a break.
Explanation:
What is the correct answers
Answer:
B, C, D
Explanation:
Polyatomic ions are ions that have more than 1 atom.
1. What is the name for AuCl3?
A)Gold chloride
B)Gold (III) chloride
C)Gold (I) chloride
D)Gold chloride (III)
Answer:
Gold(III) chloride
Explanation:
Write the formula of the ion formed when Aluminum reacts by losing electrons
Answer:
If alluminium loses 1 electron Al+
If it loses 2 electrons Al++
Explanation:
What are crystalline solids?
A. Solids with heterogeneous organization
B. Solids with a repeating atomic pattern
O C. Solids with a random atomic structure
D. Solids that break apart in jagged pieces
To solve this we must be knowing each and every concept related to crystalline solids. Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
What is crystalline solids?One form of solid-state material is crystalline solids. Solids are substances with a melting point higher than ambient temperature at atmosphere pressure. Solids are classified into two categories based just on arrangement of their constituents: amorphous solids and crystalline solids.
Crystalline solids are solids with a regular but three-dimensional arrangement of component units including such (atoms, molecules, or ions). Crystalline solids are the solids with a repeating atomic pattern.
Therefore, crystalline solids are the solids with a repeating atomic pattern. the correct option is option B.
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Complete and balance HBr(aq)+NaHCO3(aq)→
Answer:
NaHCO3(aq) + HBr(aq) = CO2(g) + H2O(l) + NaBr(aq)
Explanation:
I think it's a doubel replacement.
Determine the name for P4010.
Answer:
Technically, the name for P4o10 is Tetraphosphorus Decaoxide, but most people call it Phosphorus Pentoxide
Explanation:
Tetraphosphorus Decaoxide is a chemical compound. The molecular formula for this compound is P4o10. But, under normal conditions, it is actually a dimer of P205, which is Phosphorus (V) Oxide, or Phosphorus Pentoxide.
To solve this we must be knowing each and every concept related to chemical compound. Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
What is chemical compound?A chemical substance was made up of numerous comparable molecules that are made up of atoms from multiple elements that are held together through chemical bonds. Compounds are classified into four types based on the way the component elements are kept together.
A chemical formula is a method of communicating information about the atom components that make up a specific chemical compound, using conventional acronyms again for chemical elements and subscripts to express the atomic mass involved. The name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
Therefore, the name for P[tex]_4[/tex]O[tex]_{10}[/tex]. is Tetra phosphorus Deca oxide.
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A sample of liquid mercury is heated from 20°C to 40°C. Which measurement of the sample will increase during this process? volume, density, mass
its volume this is the answer because the mercury will turn into gas. gas has more volume because it takes up more space as it spreads.
Answer: It’s Volume
Explanation:
4. Which of the following statements correctly describe atoms? Select all that apply.
A)Atoms have mass,
B)Atoms are the basic unit of a chemical element.
C)Matter is made of atoms.
D)Atoms take up space.
Answer:
all of the above
Explanation:
adams take up space they take up mass they are the basic chemical unit and matter is made of adams
Answer:
All of them except "Elements are the basic unit of atoms."
Explanation:
I took the quiz :D
If “light A” has a longer wavelength than "light B”, then “light A” has
“light B”.
Answer: light A has less energy than light B
Explanation: The longer wavelength the less energy. The shorter wavelength the more energy.
An oil tanker spills a large amount of oil near the ocean shoreline. Which application of chemistry would best solve this problem?
Elastic energy is stored when an object is stretched. Is this an example
of potential or kinetic energy?
A. Neither
B. Both
d
C. Kinetic
O
D. Potential
Reset Selection
Answer:
D: potential
Explanation:
Once an action plan is in place, it should not be changed.
Please select the best answer from the choices provided.
ОТ
OF
Answer:
F = False
Explanation:
An action plan is a plan that an individual or a firm creates, that contains their objectives, aims, strategies , which they require to achieve their specific goals.
An action plan is very detailed, streamlined and straight to the point. It contains a series or a number of steps or tasks that an individual must embark on in other to achieve their end goal.
WHEN AN ACTION PLAN AS BEEN PUT IN PLACE OR SET IN MOTION, IT CAN BE CHANGED OR ALTERED. This is because the aim of a action plan is to achieve the end goal of an individual or a firm. As long as the changes made in the action plan does not hinder the achievement of those goals then the action plan can be changed.
Some of the very common reasons why action plans are changed or modified includes:
a) To make the action plan more flexible.
b) To track and monitor your progress in achieving your end goal. If there is a delay, you can easily track it out on your action plan and modify it.
In other to create an action plan, it is very important that the goals of such that individual or firm is very well defined and clear from the beginning. Action plans must always be monitored, and updated regularly.
Answer:
F, false
Explanation:
i took the quiz on edge
Question 25———-A, YA are two isotopes of element A.
Difference between the number of neutrons
in the isotopes is?
Answer:
Option C. 1
Explanation:
Step 1:
Determination of the Neutron of both isotopes. This is illustrated below.
For isotope y xA:
Mass number = y
Atomic number = x
Neutron =..?
Atomic number = proton number = x
Mass number = Proton + Neutron
y = x + Neutron
Rearrange
Neutron = y – x
For isotope (y + 1) xA:
Mass number = y + 1
Atomic number = x
Neutron =.?
Atomic number = proton number = x
Mass number = Proton + Neutron
y + 1 = x + Neutron
Rearrange
Neutron = y + 1 – x
Step 2:
Determination of the difference between the neutron number of both isotopes. This is illustrated below:
For isotope y xA:
Neutron number = y – x
For isotope (y + 1) xA:
Neutron number = y + 1 – x
Difference in neutron number
=> (y + 1 – x) – (y – x)
=> y + 1 – x – y + x
Rearrange
=> y – y + 1 – x + x
=> 1
Therefore, the difference in the neutron number of both isotopes is 1
Which of the following inter-particle forces has the lowest potential energy?
A. ion-ion interaction
b. hydrogen bonding
c. dipole-dipole interaction
d. ion-dipole moment
Answer:
b. hydrogen bonding.
Explanation:
Hope it helps.
Which of the following is a strong acid?
A. HF (Hydrofluoric acid)
B. NH3 (Ammonia)
C. NaOH (Sodium hydroxide)
D. HCI (Hydrochloric acid)
Answer:
D. HCI (Hydrochloric acid)
Explanation:
correct me if im wrong but im pretty sure thats the answer
Consider the reaction 2AI(OH)3 + 3H2SO4 Right arrow. X + 6Y. What are X and Y? X = AI2(SO4)3; Y = H2O X = AI2(SO4)3; Y = H2 X = AI2(SO3)3; Y = H2O X = AI2(SO3)3; Y = H2
Answer :
X = [tex]Al_2(SO_4)_3[/tex]
Y = [tex]H_2O[/tex]
Explanation :
Balanced chemical equation : It is defined as the equation in which total number of individual atoms on the reactant side is equal to the total number of individual atoms on product side.
The given chemical equation is:
[tex]2Al(OH)_3+3H_2SO_4\rightarrow X+6Y[/tex]
As we know that when aluminum hydroxide react with sulfuric acid then it gives aluminum sulfate and water as product.
The balanced chemical reaction will be:
[tex]2Al(OH)_3+3H_2SO_4\rightarrow Al_2(SO_4)_3+6H_2O[/tex]
Thus, X is [tex]Al_2(SO_4)_3[/tex] and Y is [tex]H_2O[/tex]
Answer:
a
Explanation:
What is the percent of nitrogen in dinitrogen pentoxide?
A 74.1
B 62.8
C 44.4
D 25.9
Answer: D.) 25.9%
Explanation:
Dinitrogen pentoxide chemical formular : N2O5
Calculating the molar mass of N2O5
Atomic mass of nitrogen(N) = 14
Atomic mass of oxygen(O) = 16
Therefore molar mass :
N2O5 = (2 × 14) + (5 × 16) = 28 + 80 = 108g/mol
Percentage amount of elements in N205:
NITROGEN (N) :
(Mass of nitrogen / molar mass of N2O5) × 100%
MASS OF NITROGEN = (N2) = 2 × 14 = 28
PERCENT OF NITROGEN : (28/108) × 100%
0.259259 × 100%
= 25.925%
= 25.9%
You have left the carton of milk out of the refrigerator overnight and it has
spoiled. This is an example of a
A. Physical property
O
B. Physical change
OC. Chemical property
D. Chemical change
Reset Selection
Answer:
D: chemical change
Explanation:
What are the coeffients that balance the following skeletal equation?
CH4 + O2 + Cl2 ® HCI + CO
Answer:
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
Explanation:
Equation
CH4 + O2 + Cl2 => HCI + CO
we have to balance it
On LHS atoms of oxygen is 2 while on RHS it is 1 atom so lets balance oxygen first
to balance oxygen on RHS we add 2 as coefficient to CO
CH4 + O2 + Cl2 => HCI + 2CO
___________________________________________________
On RHS atoms of Carbon is 2 while on RHS it is 1 atom so lets balance Carbon now
to balance Carbon on LHS we add 2 as coefficient to CH4
2CH4 + O2 + Cl2 => HCI + 2CO
___________________________________
On LHS atoms of hydrogen is 8 so lets balance hydrogen now
to balance hydrogen on RHS we add 8 as coefficient to HCL
2CH4 + O2 + Cl2 => 8HCI + 2CO
______________________________________________
On RHS atoms of Cl is 8 while on LHS atoms of Cl is 2.
To make no of atoms of Cl 8 on LHS we add 4 as coefficient
2CH4 + O2 + 4Cl2 => 8HCI + 2CO
Thus, coefficients are as given below
CH4 ---> 2
CL2 ----> 4
HCL -----> 8
CO-------> 2
Which type of reaction involves the release of energy into the surroundings? Options: endothermic reactions
exothermic reactions
Answer:
exothermic reaction
Explanation:
The definition of exothermic is:
describing a process that involves the release of energy into the surroundings by substances undergoing change.
Think of ex-othermic as energy exiting/ released and en-dothermic as energy entering.
Answer: it’s endothermic
Explanation:
The empirical formula is:
A. the actual number of atoms of each element in a molecule.
B. representation of a compound that shows how its atoms are arranged.
C. All of these
D. the relative number of atoms of each element, using the lowest whole ratio.
Reset Selection
Answer:
option c the relative number of atoms of each element using the lowest ratio because empirical formula gives the simplest-whole number ration of each element
e.g. the empirical formula of benzeneC6H6 in CH
Explanation:
I HOPE IT WILL HELP YOU
Which of these is an example of an engineering solution?
O
A. Studying the diets of people with autoimmune diseases.
B. Creating a biodegradable trash bag.
C. Figuring out how long it takes plastic to degrade in a landfill.
D. Studying new species of insects in the Costa Rican jungles.
ASAP!!!
Answer:
B. Creating a biodegradable trash bag.
Explanation:
Engineering is generally defined as the use of scientific principles to design or build structures such as buildings, bridges and vehicles.
Engineering is the application of science or math to solve our daily life problems. So, creating a biodegradable trash bag is an example of an engineering solution which solve the environmental-related issues.
Hence, the correct option is B.