Nơi chia sẻ tri thức, kết nối cộng đồng và giải đáp mọi thắc mắc từ A–
Nơi chia sẻ tri thức, kết nối cộng đồng và giải đáp mọi thắc mắc từ A–
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Une petite fille vraiment très laide va commander un gâteau à la boulangerie pour l'anniversaire de sa petite sœur. La boulangère, émue par cette petite fille ...
What would the exact solutions in the interval [0,2π) for this ...
cos 2x - cos x = 0 <＝> 2cos²x-cosx-1=0 <＝> (2cosx+1) (cosx-1) = 0 ＝> cosx = -1/2 ∨ cosx=1 cos x =-1/2 <＝> x=2∏/3 ; x=4∏/3 cos x =1 <＝> x=0 ...
X×5=10, so what is the value of x?
X = 10/5 = (5x2)/5 = 2 after cancellation of 5 in numerator and denominator. Hence, the value of X = 2 ...Read more
If 1/x=0, then what is the value of x?
Upvote ·. Profile photo for Jack Smith. Jack Smith. Lived in Philadelphia, PA · Author has 4.4K answers and 11.7M answer views.Read more
How can I solve sin2x - cos2x = 1?
Use the identities sin(2x)=2tan(x)/(1+tan(x)^2) and cos(2x)=(1-tan(x)^2)/(1+tan(x)^2). The given equation becomes (2tan(x) - 1 + tan(x)^2)/(1+ ...Read more
KCL reacts with O2 to produce KCLO3. How many formula ...
KClO3 = KCl + 1.5 O2 or as 2 KClO3 = 2 KCl + 3 O2. Either way it indicates that 1 molecule of KClO3 produces 1.5 molecules of O2, and 1 mol ...Read more
What is correct, 'There is no' or 'There isn't any'?
Both can be right. The plural is “There are none”. The singular is “There is none (abbreviated to “There's none.” The subject is said in the ...Read more
Is it “there's not” or “there isn't”?
Grammatically, there is no real difference. It's a simple matter of the placement of the contraction, but both are forms of “it is not.”.Read more
What products are exactly formed when NO2 reacts with ...
What products are exactly formed when NO₂ reacts with H₂O? The reaction between NO₂ and cold water gives nitric acid and nitrous acid.
What is a child between 0-10 years old called?
I hope this helps. Ages 0-9-Narians 10-19-Denarians 20-29-Vicenarians 30-39-Tricenarians 40-49-Quadragenarians 50-59-Quinquagenarians ...
What is the difference between 'did you finish' and 'have ...
First of all, we have two different tenses here. Whereas “Have you finished your homework?” is in the present perfect tense, “Did you finish ...Read more
Which is grammatically correct, 'Are you finished?' or 'Have ...
Both are correct in two different situations. “Have you finished” refers to an action when someone is being asked if they have completed a task they're given.Read more
What is 19 divided by 4?
If you want a “classic” division and a decimal result, there is already a lot of answers (look at them) : 194=4.75 19 4 = 4.75 · If you want an ...Read more
What's your favorite thing you own and why?
Confidence. It is undoubtedly the greatest possession a man can have.Read more
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How many moles of Fe3+ ions are present in 2 ...
Fe2(SO4)3 = 2 Fe3+ + 3 SO42- 1 mole Fe2(SO4)3 contains 2 moles Fe3+ ions Therefore,2 moles………….2×2 = 4 moles Fe3+ ions.
What is barrium bicarbonate?
Ba(HCO3)2 is the barium bicarbonate which is basically used in the industry as an ingredient in the glaze. Which is acts as a flux, a matting ...Read more
How to solve the product of 5 and a number is -80
Let the required number be x. According to question,. 5 * x = -80. => x = -80/5.Read more
Can you start a sentence with 'despite'?
Absolutely you can start a sentence with “despite.” Its a dependent clause so it must be followed up with a (break) comma and then closing independent clause.Read more
How do I calculate last four digits of ((2015^2013) ^2014)?
let us write 2015 as 2015 = 2000 + 15 Lets say 2013^2014 = n So we have to find the last 4 digits of (2000 +15)^n Now lets consider the ...
What is the answer of (x-5) ²?
The answer is definitely 7. How can you make x stand alone? The only way to make sure what value to x (added/subtracted/multiplied/divided) ...Read more
What are hobbies, and how do you get into them?
Hobbies are activities you enjoy spending time on. It can be something you'll pursue as a career, but it can also serve as your entertainment ...Read more
Cl2 + KOH →KCl + KClO3 + H2O what is the oxidation ...
In potassium chlorate (KClO3), Cl is in the +5 oxidation state. The Cl2 undergoes both oxidation and reduction.Read more
What's the exact reaction of [Ag(NH3)2]NO3 with aldehyde?
[Ag(NH₃)₂]NO₃ contains [Ag(NH₃)₂]⁺ and NO₃⁻ ions. [Ag(NH₃)₂]⁺ ion exist in basic solutions only. The reaction is known as Tollens reaction in ...Read more
How to solve equations like cos(x) = 0.6 without using a ...
How to solve equations like cos(x) = 0.6 without using a calculator - Quora. Something went wrong. Wait a moment and try again.Read more
What is the empirical formula for benzene (C6H6)?
Benzene, also known as benzol, is an organic chemical compound with the formula C6H6 C 6 H 6 . It is a colorless and flammable liquid with a ...Read more
What is the correct way to say 'eating ...
What is the correct way to say "eating"? Is it "to eat" or "eating"? Why or why not? What are some examples of this usage in English grammar?Read more
Why is the correct spelling “eating” and not “eatting”?
Ea-ting is different. Eat is different in that it has no opening consonant and is slightly different in pronunciation having the longer vowel.Read more
What's the semantic difference between “She doesn't work ...
“She's not working at the moment” Suggests that she does work, but presently she's not, perhaps she's on a work-break or on holiday or perhaps ...Read more
How to solve sin2x - sin x=0 for [-π,π]
Use sin(2*x)=2*sin(x)*cos(x) to get. 2*sin(x)*cos(x)-sin(x)=0 or. sin(x)*(2*cos(x)-1)=0 so either sin(x)=0 or 2*cos(x)-1=0 and cos(x)=1/2.Read more
How do we know the resulting compounds from this ...
No, FeSO4 and HCl will be the products when pure (solid) FeCl2 is heated with conc.H2SO4. FeCl2 + H2SO4 = FeSO4 + 2HCl. Sulphuric acid is ...Read more
Which top 30 manhua or manhwa do you recommend to ...
1. Rebirth of the urban immortal cultivator 882 · 2. Rebirth of the immortal swordsman in parallel world 377 story end · 3. I'm the immortal king ...Read more
What happens when ammonium sulfate and sodium ...
when ammonium sulphate reacts with sodium hydroxide, it leads to formation of sodium sulphate, ammonia and water. (NH4)2SO4+ NaOH→ Na2SO4+ NH3+ ...Read more
Are we humans really destroying our planet, or it may be ...
We do not have the power to destroy either the planet or life on it. We are causing big changes in the ecosphere, driving many species to ...Read more
How to decompose Na2O completely to Na and O2
The only way to do this (so far) is to melt the sodium oxide and pass an electric current through it. Na2O becomes an ionic liquid when melted.Read more
How do we factorize 4x^4+81?
Factor 4x^4 and 81, (2x^2 )^2 + 9^2 Then try sum of squares rule, a=2x^2, b =9 = (2x^2 + 9 )^2 - 2(2x^2)(9Read more
What is the factorial of 4x^4+81?
The answer to the computation is 4×4+81=16+81=97. Do the multiplying first and then add 81. Upvote ·. 9 ...Read more
Why do people believe in things? You either know ...
Believing is something our brains were designed to do. It is our adaptation that allow for whatever survival success we have had. Everything ...Read more
What is equal to 2 to the power of 32?
Let's figure this out together, shall we? 2^1 = 2 2^2 = 2×2 = 4 2^3 = 2×2×2 = 8 2^4 = 8×2 ... 22k=232k 2 2 k = 2 32 k.Read more
What is the difference between 'do a course' and 'take ...
'do a course' can mean either 'give a course' or 'take a course.' For example, “When I was an ESL teacher, I did/gave a course on technical writing for ...Read more
How do you use “wealth of knowledge” in a sentence?
A wealth of knowledge will see you go far in life; but not as far as an equivalent wealth of money. To acquire a vast wealth of knowledge in any age takes a ...Read more
What is the IUPAC name of cH3-ch2-ch2-ch3-ch3-ch3?
So, the common name of this compound is Diethyl ether. In the case of the IUPAC name, the longer alkyl group is considered the parent ...Read more
What are the values of A,B and C , if ABC+BCA+CAB=ABBC?
'A' must be 1 or 2 since the thousands digit must be 1 or 2. 'B' must be 8 or 9 since the ones digit 'C' must equal 'C' + 10 and A+B must be 1+9 or 2+8.Read more
Is it wrong to say 'What a terrible weather we have today'?
Nope. “Weather” is uncountable, and “a” is only used with singular nouns. It should just be “what horrible weather”.Read more
Why was Simon Peter's name changed to John?
The apostle known as Peter was originally called Simon. Jesus renamed him Peter, meaning “rock” (Cephas in Greek). John was another disciple altogether.Read more
What are all solutions to x + 2xy + y = 8 when x and y are ...
x + 2xy + y = 8 or y = (8 - x)/(2x + 1) with x ≠ -1/2 and y ≠ 1/2. This is a hyperbola.Read more
How to respond when someone says “why are you taking ...
Be honest. Write, “I like talking to you.” She may respond negatively, like, “I don't like talking to you.” That message will hurt.Read more
Should 'I should' be considered grammatically correct?
It depends on how you are using it. It can be grammatically correct if you are using it to describe fact (indicative) rather than hypothetical ( ...Read more
What is the mole ratio of NH3 to N2?
Hence, the mole ratio of nitrogen to ammonia in the balanced equation is 1:2 or it is 2:1 for ammonia to nitrogen.Read more
How to calculate the PH of Na2CO3 .001 M in H2O
The pH of a system is a measure of the amount of free hydrogen ions in solution, as given by the following formula: pH = -log[H+].Read more
What is your surname? Why did you choose it as ...
Typically you don't choose your surname it is what your parents give you when you are born. Usually it is the fathers last name if the parents ...Read more
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