Compound would look like this. A2B3 A = 6 total valance ( two atoms ) B = 6 total valance ( three atoms )
When determining the formula for a compound suppose element A has a valence number of 3 and element B has a valence number of 2 if the two elements combine what subscript will b have?Suppose you have a pure substance. How can you tell whether it is a compound or a element?
Compounds, when heated, will decompose, and break down into the elements which they consist of. Elements do not decompose.
Which compound led to discovery of the compound of noble gas?
I suppose that this compound is xenon difluoride - XeF2.
When determining the formula for a compound it is important to know the valence numbers of each element Suppose that element A has a valence number of 3 and element?
Presuming that Element B has valency of 2, then the resulting compound will most probably be 2 atoms of element A for every 3 atoms of element B.
Is ironIIhydroxide covalent or ionic?What is the comound name for cl4f7?What is the name of this ionic compound TiNO32?
The name may be be titanium(II) nitrate but I suppose that this compound doesn't exist.
What does it mean for a subscript to be out-of -bounds?
This is a type of error that usually occurs in computer programs. An array is defined in which the elements of the array are identified by one or more subscripts. Suppose you have an array which is declared to be of dimension 23. Then if the program tries to access element 26 in that array, it cannot because there is no element of the array in that position. That is when you will get this… Read More
Can kosher salt be used for canning?
I suppose that is possible - the chemical compound is sodium chloride.
What is the pure substance when a fixed ratio is formed?
I suppose that you think to a stoichiometric chemical compound.
What is the chemical name for the compound with the formula NA S?
I suppose that you think to Na2S - sodium sulfide.
What is the chemical formula for heptiodine monochloride?
This formula may be I7Cl but I suppose that this compound doesn't exist.
Suppose an element x is in group 2a and an element y is in group 7a the empirical formula for the compound between x and y?Suppose you encounter a chemical formula with H as the cation What do you know about this compound immediately?What is the correct formula for compound interest?
Suppose the amount invested (or borrowed) is K, Suppose the rate of interest is R% annually, Suppose the amount accrues interest for Y years. Then the interest I is 100*K[(1 + R/100)^Y - 1]
What do plasmodium eat?
I suppose they eat, along organic matter, inorganic elements like arsenic
A contains a variety of elements and compounds that are not chemically combined with each other.?Who did the maiden classification on compounds based on their chemical properties?
I suppose that you think to chemical elements, not to compounds. Dimitri Mendeleev is credited for the creation of the periodic table of elements.
What s the name of molecular geometry exhibited in a krypton dibromide molecule?
I suppose that this compound is not obtained up today.
What is the sum of atomic mass?
I suppose that you think to atomic weights (not mass) of chemical elements and the molecular mass.
Elements and compounds make a large class of matter known as?
I suppose that you think to the solid state of matter.
What element is most commonly found as part of a compound with polonium?
The chemistry of polonium is not known in details but I suppose that this element is oxygen.
Which potassium salt K is the most soluble at 40 C and 80 C?
I suppose that this compound is potassium carbonate, K2CO3.
What does a subscript term mean?
A subscript is just a tool used to define a variable such as if you were give a trapazoid, (with two bases) you could label them b sub1 and bsub2 --------------------------------- Suppose you have a variable, such as the mass of an object. We usually denote this with something like m. However, if we were working on a problem involving several masses, we cannot use m for each ones. Therefore, we insert subscripts such as… Read More
What is the shorthand notation for a compound?
I suppose that you think to a chemical formula. Example: table salt (sodium chloride) has the chemical formula NaCl.
Why do onions smell like they do?
I suppose that this compound is syn-propanethial-S-oxide. Other organic compounds of sulfur exist in onions.
What is the formula for manganese(VI) chloride?
Very probable this compound doesn't exist. I suppose that you think to MnCl2 or MnCl3.
Why do you suppose that the word periodic is used to describe the periodic table?
The way the elements are sorted are by block and period. Hence periodic.
What is a complement subset and intersection of sets?
Suppose A is a subset of S. Then the complement of subset A in S consists of all elements of S that are not in A. The intersection of two sets A and B consists of all elements that are in A as well as in B.
What kind of elements never exist alone?
I suppose that the question refers to chemical elements and their natural state. Indeed, some elements cannot be found 'alone' (i.e., not combined) in natural state. This applies to the most reactive elements, such as fluorine (gas), chlorine (gas), sodium (alkali metal), etc.
In a mixture elements or compounds are blended without a chemical reaction?
yes and no because they all are suppose to have a chemial reaction SO the answer is TRUE
Is jello an element or substance?
well it isn't an element. an element is one of the 118 current elements on the periodic table. its a substance i suppose
What name is given to elements bordering the zig-zag line that runs diagonally from aluminium to ununoctium?Can Venus explod?
That's an odd question. a suppose it could explode if given the necessary elements and time.. but i doubt that would happen.
What is a household compound machine that can fit in a backpack other than a nut cracker and a can opener?
A corkscrew..although I suppose it would have to be the type with levers at the sides, in addition to the screw, to be considered a 'compound' machine. Then again, if a nutcracker is considered 'compound', that opens the door for cheese graters, garlic presses and pepper mills.
Is there a plural for suppose?
The verb form 'to suppose' used for a plural subject is suppose, for example: We suppose.. You suppose.. They suppose.. The students suppose..
How is correct tilleintricho or trichotillein?
This word is not in my Liddel and Scott, but since -ein is an infinitive ending, and tricho- is the compound form, my guess is trichotillein, meaning (I suppose) to pluck the hair out.
How can you use suppose in a sentence?
What do you suppose he will do? I suppose he didn't mean to kill her. Suppose that he wins the election
Suppose you stir a little baking soda into water until the water looks clear again How could you prove to someone that the clear material is a solution not a compound?
If you evaporated the water then the baking soda would be left which states its a solution. If nothing is left then it is a compound. Hope this helped :)
Why its melting point of acetalinide is above 116 after recrystallization?
5) Listed below are solubility vs temperature data for an organic compound in water. temp. sol. in 10 mL water 0 0.15 g 20 0.30 g 40 0.65 g 60 1.10 g 80 1.70 g a. Using the data in the above table, graph the solubility of the compound vs temperature. Connect the data points with a smooth curve. b. Suppose 0.1 g of this compound is mixed with 1.0 mL of water and heated… Read More
What is element of love?
Love is not an element, it is a compound formed largely from slush. I suppose diamonds signify love (in marriage), so it would have to be carbon. Although gold might be a close second.
Suppose that aqueous solutions of barium nitrate and potassium carbonate are mixed What is the name of the compound or compounds that precipitate?
It's Barium Carbonate. Due to the solubilty rules, nitrates and chlorates are soluble.
How is iron made from iron oxide?
Iron oxide is a chemical compound made of iron ore and oxygen, otherwise known as hematite. I suppose you would smelt this to get the ore and produce iron from it.
Can you use the word suppose in a sentence?
How do you suppose we are going to do this. I suppose that would be easy to do.
Suppose that each year one half of the population have two offspring per person and the other half have none If all members die after one year what is the resulting growth rate?PH mitric method for determination of stability constant?
Yes it can be determined by monitoring the change of the pH with time. Suppose you have a compound that is almost constant upto certain time but after some time the pH is getting decreased .So this is the point where your compound is degrading so at that pH calculate pKa and from there the stability constant.
What is tracking the path and constructing a periodic table?
suppose a new element X is known.it forms a compuond with chlorine,and the formula of this compound is XCL. what group or family do youm think this element would belong?
Color of magnesium chloride?Is the word suppose an adjective?Do plants produce food from the sand they grow with?
Not all plants grow in sand. Plants produce food from a combination of elements in their environment, including sunlight, water, and nutrients in the soil (or sand, I suppose).
Chemistry/Earth Sciences/Atoms and Atomic Structure
Which type of matter consists of two or more substances that are not chemically combined?What consists of two or more substances not chemically combined?
mixture [mec3usa] Hydrated calcium sulphate is one example. The water in the substance is not chemically combined with the salt (CaSO4).
Lemonade consists of several substances that not chemically combined so lemonade is classified as a?Consists of substances that are physically blended but not chemically bonded?
A mixture consists of substances that are physically blended but not chemically bonded.
Is cereal and milk a solution?
yes, because a solution is the 'best-mixed' of all possible mixtures which consists of two or more substances that are not chemically combined. EX: if you bake cookie dough in the oven with chocolate chips they become chemically combined.
A compound consists of substances combined in what proportions?
A compound consists of substances combined in definite propertions lol From the sciene grade 9 textbook? :P
What is since lemonade consists of several substance that are not chemically combined what is lemonade classified as?Lemonade consists of severalsubstances that are not chemically combined so lemonade is classified as what?Is ammonium sulfate element or compound?
Ammonium sulfate is a compound. It consists of a number of elements - nitrogen, hydrogen, sulfur and oxygen - which have been chemically combined to form the compound. An element is a pure substances that cannot be broken down into simpler substances through chemical means.
What are compounds and why do they form?
A compound is a substance that consists of two or more elements that are chemically combined in specific proportions.
How do you know which elements are compounds?
No elements are compounds. A compound consists of 2 or more elements that are chemically combined.
In Which classification of matter are the componets chemically combined?
A molecule. A molecule consists of one or more atoms chemically combined. If the atoms are not the same ie not two oxygen atoms but two oxygen and a hydrogen atom then the a compound is formed.
What does a compound consists of?
A compound is a substance that consists of two or more elements that are chemically combined in a specific proportions Hope that helps GO BRONCOS class of 2014
How are mixtures and compounds alike and different?
Mixtures and compounds are alike in the manner that they are made up of two or more different parts. They are different in the manner, that a compound usually consists of elements being chemically altered, and in a mixture the substances are just combined.
Is wine a compound or a mixture and why?
Wine is a mixture because it contains a variety of substances that are not chemically bonded. It consists of ethanol and other organic substances dissolved in water.
Why is O2 not a compound?
A compound is composed of two or more elements which have combined chemically. The O2 molecule consists of just one element, which is oxygen.
Is magnesium carbonate a compound or an element?
Magnesium carbonate is a compound. It consists of the elements magnesium, carbon and oxygen chemically combined. As a rule of thumb anything with two or more elements chemically bonded together is a compound.
Why is vinegar a mixture not a pure substance?
Vinegar consists of two substances that are mixed together but not chemically bonded to each other: water and acetic acid.
Is sodium phosphate a pure substance or mixture?
Empire total war polish reviews. Sodium phosphate is a compound and not a mixture. It consists of sodium, phosphorus and oxygen chemically combined together into a pure substance.
Is waterH2O a compound or elemen?
a compound is a two or more elements chemically combined, so water is a compound. An element is a molecule which consists of one type of atom only
What type of matter that cannot be separated by physical change?
A compound consists of two or more elements chemically combined together and as such, compounds cannot be separated by physical change or means.
Is barium sulphate a compound or an element?
Barium sulfate (BaSO4) is a compound. It consists of three elements, barium, sulfur and oxygen chemically combined. Together these elements make up the compound.
What is a mixture or pure substance?
A mixture consists of two or more components that are mixed, but not chemically combined, and can exist in various ratios. A pure substance is an element or a compound, having a definite composition.
Mixtures and solutions?
A mixture consists of two or more substances that are combined together. Solutions are homogeneous mixtures that exist in one phase. An example of a solution is sugar water.
Are substances elements or mixtures?
A substance can be an element, a compound or a mixture. Sodium is a substance and also an element. It is a substance but consisting of only one type of atom. Sodium Chloride is a substance and also a compound. It is a substance but consists of two elements chemically combined and is thus also a compound. Sodium chloride and sand mixed together is a substance and also a mixture.
Why is hydrogen bromide a compound?
Hydrogen bromide (HBr) is a compound because it consists of two elements (hydrogen and bromine) that has been chemically combined to form a new substance. It is a colourless gas with an acrid odor at room temperature.
What is yeast chemically?
Yeast consists of micro-organisms classified as fungi. So yeast wouldn't be described 'chemically', but 'biologically' ;)
What is the name for matter that is made up of only one kind of atom?
When matter contains only one species of atom (same number of protons in nucleus of each), it is called an element. Related Information: Each element is made of atoms that are essentially the same, with the same number of protons in the atomic nucleus. An element may have stable forms with varying numbers of neutrons, and these are called isotopes. Elements are classified as pure substances, a type of matter that cannot be chemically separated… Read More
Is sea water an element mixture or compound?
Sea water is considered a mixture, because it consists of several salts dissolved in water and they are not chemically combined. Since you can't distinguish its components with the naked eye, then it's a homogeneous mixture.
Is sodium an element a compound or a mixture?
Sodium is an element, as it consists of just one type of atom. Mount and blade warband lady personality. Its symbol is Na, atomic number 11. A compound on the other hand is two or more elements that have chemically bonded together, while a mixture can be defined as two or more substances that have been brought together, but have not reacted chemically to form a new substance.
Why is breaking down a compound into its elements considered a chemical change?
its simple, seeing as how you are breaking a compound down which consists of 2 pure substances. Means that there is a chemical change via taking one pure substance out which will inturn change it chemically and physically
What carbohydrate family consists of three types of chemical substances?
the chemical substances are carbon, oxygen and hydrogen.
What is the virus capsid consists of?
Virus capsid is made of many capsomere unit ( chemically protein )
How is it that ammonia is a compound?
It consists of two elements, specifically nitrogen and hydrogen, chemically bonded together.
What body section of a spider consists of a combined head and thorax?What is Protoplasm composed of?
Protoplasm consists of substances like proteins, fatty substances, sugar & starches, phosphates,chlorides and water.
What does organic soil look like?Why is water a compound and not an element or mixture?
Water is a compound with the chemical formula H2O. It is not an element because it consists of the elements hydrogen and oxygen covalenly bonded to each other. It can be broken down into its constituent elements. It is also not a mixture because the elements are chemically combined with chemical bonds formed.
Differentiate a compound and an element?
An element consists of only one type of atom e.g. gold contains only gold atoms. A compound is two or more elements chemically combined eg. Carbon Dioxide, CO2, which contains one Carbon atom and two Oxygen atoms.
Why is H2O a compound?
H2O is a compound because it consists of the two elements hydrogen and oxygen chemically bonded together.
Two Chemicals A And B Are Combined To Form A Chemical CHow do you define matter?
the substance or substances of which any physical object consists or is composed
What is a homogeneus mixture?
a homogeneous mixture is a mixtue that consists of a uniform compositionof the substances.. ;)
What are the main substances in urine?
Urine consists of Urea, salts and other waste products that do not get reabsorbed into the blood capillaries. It also consists of water.
Compounds consists of atoma of two or more combined together in proportions?
Intermetallic compounds consist of atoma of two or more combined together in proportions.
What group on the periodic table of elemants contains members that are chemically stable?
Group 18 contains elements that are chemically stable.They are known as Noble Gases.It consists of Helium,Neon,Argon,Krypton and Xenon.
What substances make up the urine?
Urine consists of Urea, salts and other waste products that do not get reabsorbed into the blood capillaries. It also consists of water
Do all compounds contain at least one element?
A compound consists of at least two elements chemically bonded together.
What is the chemcial equation for water?
H2O. This means that water chemically consists of 2 parts hydrogen and 1 part oxygen.
Why is methane a compound?
Methane is a compound because it consists of two elements chemically bonded together and has its own unique properties.
Is nitrogen a compound molecule or an atom?
Nitrogen the gas which is about 3/4 of the atmosphere consists of molecules. Each of these molecules consists of two atoms of nitrogen that are chemically bonded together. We don't refer to nitrogen gas as a compound because, by definition, a compound must be two or more different elements chemically bonded together.
$begingroup$
The problem says:
Two chemicals $A$ and $B$ are combined to form a chemical $C$. The rate, or velocity, of the reaction is proportional to the product of the instantaneous amounts of $A$ and $B$ not converted to chemical $C$. Initially, there are $40$ grams of $A$ and $50$ grams of $B$, and for each gram of $B$, $2$ grams of $A$ is used. It is observed that $10$ grams of $C$ is formed in $5$ minutes. How much is formed in $20$ minutes? What is the limiting amount of $C$ after a long time? How much of chemicals $A$ and $B$ remain after a long time?
$ A_0$ = 40 g, $ B_0$ = 50 g.
Well, first of all, $alpha $ = $ A_0 frac{M+N}{M} $ and $beta $ = $ B_0 frac{M+N}{N} $
and then our differential equation must be:
$frac{dX}{dt} = k(alpha-X)(beta-X) $ which can be easily solved. In order to create $ x$ part of the chemical C we will need 2 parts of $ A$ and one part of $ B$. This lead me to believe that $ M$ = 2 and $ N$ = 1By calculating $alpha$ = $ 40 frac{2+1}{2}$ = 60 and $beta $=$ 50 frac{2+1}{1}$ = 150. The differential equation must become $frac{dX}{dt} = k( 60-X)( 150-X) $ right?
I separate the variables and solved the equation$$int frac{dx}{(60-x)(150-x)}, = int kdt$$
$$ln frac{150-x}{60-x} = 90kt+C_1 $$By using X(0)=0, $$frac{150-x}{60-x} = Ce^{90k0}, C=frac{5}{2}$$and using X(5)=10 and solving for k, $$frac{150-10}{60-10} = frac{5}{2}e^{450k}, k= 2.5184X10^{-4}$$ and this is different to the solution of k in the solution manual which is $ k$ = $ 1.259X^{-4}$ and also, the differential equation is different, they obtain $frac{dX}{dt} = k( 120-2X)( 150-X)$
And I'm wondering why! I assume my mistake is in the values for $ M$ and $ N$. Can you give me a hand with this?
Rodrigo de Azevedo
13.5k44 gold badges2121 silver badges6666 bronze badges
JavittoxsJavittoxs
$endgroup$
2 Answers$begingroup$
The only difference is that your $k$ is their $2k$. And look, you get exactly double their answer. So you actually have the same answer.
Stephen Montgomery-SmithStephen Montgomery-Smith
18k11 gold badge2222 silver badges4848 bronze badges
$endgroup$$begingroup$
Solving our equation for x: $$frac{150-x}{60-x}=C_1e^{90kt}$$ We obtain: $$X(t)=frac{60 C_1e^{90kt}-150}{C_1e^{90kt}-1}$$And if we substitute $ k=2.5184X10^{-4}$ and $ C_1 = frac{5}{2}$ this would be:$$ X(t)=frac{150 e^{0.0226656t}-150}{frac{5}{2}e^{0.0226656t}-1}$$Now we're able to answer Part A:$$ X(20)=frac{150 e^{0.0226656*20}-150}{frac{5}{2}e^{0.0226656*20}-1}=29.32$$ Part B:$$lim_{x to infty} f(x) = frac{150 e^{0.0226656t}-150}{frac{5}{2}e^{0.0226656t}-1} = 60g$$ <- This would be the maximum amount of C possible. And finally Part C:Chemical A remaining after a long time:$$A = A_0-frac{M}{M+N}(X) = 40-frac{2}{3}(60) = 0 g$$And Chemical B after a long time:$$B = B_0-frac{N}{M+N}(X) = 50-frac{1}{3}(60) = 30 g$$
JavittoxsJavittoxs
$endgroup$
Not the answer you're looking for? Browse other questions tagged ordinary-differential-equationschemistry or ask your own question.
I am working on my project with matlab and I need to combine two matrices like this:
A and B are 16*50 matrices
My new matrix C should be as this:
How can I do this please help.Thank you.
Çiğdem ÖzerÇiğdem Özer
4722 gold badges22 silver badges1010 bronze badges
2 Answers
You should definitely read @woodchips' answer first: it's important to learn how MATLAB stores arrays in memory.
In any case, I would go for:
or
Since these approaches avoid re-ordering the elements.
NzbuuNzbuu
Learn to visualize where the array elements are in memory, and how tools like reshape, permute, etc., operate on those elements.
First, can you simply combine the two matrices one on top of each other? [A;B] will suffice of course.
What would happen if you then used reshape on the result? So something like this..
Next, what happens if you apply permute?
Are we getting close? What if you did a reshape on THAT result? (Yes, you might want to do all of this in several steps to make it readable. Readable code is terribly important when you need to debug it next month or next year. As important are comment lines that tell what a block of code does.)
The point is, learn to use the tools in matlab to move your elements around in memory with your target in mind. Before you are done, don't forget those comments. Easily read code is easily debugged code. If the single line of comment I suggested is inadequate for you, then add more lines. Comments are virtually free! They cost you nothing more than a few seconds to write, and no time to execute, but they improve your code immeasurably.
user85109
Not the answer you're looking for? Browse other questions tagged matlabmatrix or ask your own question.Comments are closed.
|
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |