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 is 12 x 4?
This is something taught in the elementary grade. If you are an elementary student, check the times tables and you can easily learn that 12 x 4 ...Read more
What is 1/3 +1/3?
1/3 + 1/3 = 2/3. You keep the denominator (3) and just simply add up 1+1 for the numerator. Therefore, you get 2/3.Read more
In English grammar, does a person 'sit an exam' or 'sit for ...
Both are acceptable.The only variation relies between them is that “sit an exam” depicts British English while “sit for an exam” depicts ...Read more
Which is grammatically correct to say, 'write an exam' or 'sit ...
Both are grammatically correct, but the customary usage is “to sit a test” or “to take a test”. “To attempt a test” ...Read more
For the following reaction: Na2CO3(s) + H2SO4 (aq) → ...
Na2CO3(s) + H2SO4(aq) >>> Na2SO4(aq) + H2O(l) + CO2(g) 1 mole of Na2CO3 + 1 mole H2SO4 = 1 mole of Na2SO4 + 1 mole of H2O + 1 mole of CO2.
How can you show that 2 3/8 is a rational number?
2 3/8 is a mixed fraction which can be expressed as improper fraction as 19/8. Now 19/8 is a a rational number as 19 & 8 are both positive ...Read more
Which sentence is correct: 'The cake, I eat delicious!' or ' ...
Here's some correct options: 1) I eat delicious cake! 2) The cake I eat tastes delicious! 3) This cake I am eating tastes delicious! 4) This cake is delicious!Read more
What is the equivalent mass of NH4NO2 in the redox ...
Since both half reactions will involve 3 electrons (one N going from –3 to 0, the other going from +3 to 0), the equivalent weight would be 1/3 of the molar ...Read more
How to integrate (ln x /x^2) dx
Something went wrong. Wait a moment and try again. Try again. Please enable Javascript and refresh the ...
Which is correct, volunteer to or volunteer for?
Both can be correct, if used correctly. “Volunteer to” must be followed by a verb in the infinitive form; in fact, the “to” is part of the verb.Read more
How to balance a reaction equation NH4NO3(l) → N2O(g) ...
NH4NO3 decomposes at 230 deg. C producing nitrous oxide gas (N2O) and water vapour. Above 260 deg. C, if confined and when contaminated, NH4NO3 ...Read more
How to solve (X-2y) 5 using the binominal theorem
I suppose you want to expand (x - 2y)⁵ by binomial theorem. (x - 2y)⁵ = x⁵ - ₅C₁ x⁴ (2y) + ₅C₂ x³ (2y)² - ₅C₃ x² (2y)³ + ₅C₄ x (2y)⁴ - (2y)⁵ ...
Which one is correct, 'I am interested' or 'I'm interested'?
They are both grammatically correct. “I'm interested” is less formal. You would use it in conversation, but “I am interested” in a business ...Read more
KMnO4 + HCL > KCL + MnCl2 + CL2 + H2O
In this reaction,the oxidation no.of Cl in HCl(reactant) is -1 but in Cl2(product) is zero. That means HCl is oxidized with KMnO4. Again,the ...Read more
What will happen when excess ethanol reacts with conc ...
H2SO4 is heated to 170 degree. It is an alkene having the structural formula H2C=CH2. C2H5OH (+ conc.H2SO4) = C2H4 + H2O. At 14o degree ...Read more
What is Kekma Net?
Kekma Net is a Japanese online retailer that offers a wide range of products, including clothing, cosmetics, and home goods.Read more
What is the answer for Cot (tan^-1 x)?
tan−1 is the inverse function of tan , and cot is defined by cotx=1tanx x = 1 tan .Read more
Is tan^-1(x)=cot(x)? If yes or no, why?
No, they don't have the same meaning. tan−1 tan − 1 is the inverse function of tan tan , and cot cot is defined by cotx=1tanx cot x = 1 tan ...Read more
What do you get when you multiply 24 x 5? You can leave ...
24 x 5 is: 2 x 10 x 5 + 4 x 5. You can calculate it yourself. Upvote ·. Related. What are two numbers that when ...Read more
What is the expansion of ln(1-x)?
5 answers · Top answer: %3E What is the expansion of [math]\ln(1-x)[/math]? ‘Expansion’ is, strictly speaking, ...
Do teachers actually care when you say 'Good morning ...
Is it rude to greet teachers just by saying hi or hello or good morning/afternoon without adding Mr/mrs/miss? And Is it natural to say hello/hi/ ...Read more
How do you say good afternoon to a teacher with ...
Good afternoon = boa tarde. Good night = good evening = boa noite. Boa noite is used for going to bed, or arriving at a dinner party ...Read more
What are the implications of being called 'father' by your ...
It means you were raised by your dad. Any guy can become a father but it takes a real man to raise someone else's child and become a dad.Read more
Why does x^1/2 have two roots?
It DOES NOT! There are two numbers that satisfy y^2= x, one positive and one negative but only the positive root is denoted x^1/2. The negative ...Read more
Which property would you use to solve the equation log2(x ...
The only solution to this equation is at -1.01243. As log4 is only defined on positive values, the original equation has no solution. Upvote ·.Read more
Which is correct: 'He congratulated him for his success' or ' ...
The standard expression is to congratulate someone on their achievement. We congratulated him on his success. They congratulated me on my ...Read more
If the formula of water is H2+O2->H2O, why isn't it H2O2?
Because water is not H2 + O2. It is not made of 2 hydrogen and 2 oxygen, but two hydrogen and one oxygen. Therefore it is H2 (two hydrogen) plus ...Read more
How do I solve Na2CO3(aq) +CO2(g) H2O(l)---》NaHco3(s)?
What is the balanced equation for: NaOH +CO²= Na²CO³ + H²O · NaOH is Sodium Hydroxide · CO₂ is Carbon Dioxide · Na₂CO₃ is Sodium Carbonate · H₂O ...Read more
Is it 'do we use' or 'are we using' (grammar, word choice, ...
Basically “do we use” is asking for instructions, and “are we using” is asking for a current action or process. Upvote ·. 94.Read more
which one is grammatically correct?
... we use daily" or "we are using daily"? ·. The adverb “daily” suggests that you should use the simple (also called habitual) present tense.Read more
Why does Iron(III) carbonate not exist?
Iron(III) carbonate cannot exist in water. In solid state, most of iron(III) compounds are hygroscopic, which means that they have strong affinity for moisture.Read more
Is it rude to tell people they look tired?
To me, it's usually used as a way of asking 'what were you doing last night?' while implying that it looks like it was either exciting or awful.Read more
What are the solutions to the equations 3x + y = 5 and x
Check that x+y=1/3+2/3=1, yes, and 5*x-y=5*(1/3)-2/3=5/3–2/3=(5–2)/3=3/3=1, also yes.Read more
What is the differences between những and các ...
“các” mostly used with pronouns which replace known nouns in speaking. Ex. “các anh”/”các chị”/”các người” hãy đi đi. But. Ex. “những người ...Read more
What is the oxidizing and reducing agent when Cl2 reacts ...
H2SO4 + 2H+ + 2Br- → Br2 + SO2 + H2O. The sulfuric acid is reduced (S goes from +6 to +4) and Br- is oxidised (bromine goes from -1 to 0) ...Read more
How can we solve x^7 + I= 0 by De Moivre's theorem?
The equation is x^7 = -1. To help us visualize De Moivre's theorem, we can rewrite it as x^7 = -1 + 0i. However, we need to convert this to polar form.Read more
In x-4=0, what is x?
4x-4=0 by adding 4 to both sides of the equation you get 4x=4. By dividing both sides by 4 you get x=1.Read more
What is the domain and range of the function tan (2x+1)?
Therefore, the domain is (-∞,+∞). Range : Range of any continuous funtion lies inbetween the minimum and maximum value of that function ...Read more
What happens when an acid reacts with ammonium sulfate ...
Most acids don't react with ammonium sulfate (NH4SO4) because the first ionization of sulfuric acid is a strong acid (pKa1=-3).Read more
How to arrange the following compounds (H2O, H2S, BR2, ...
Simple: First decide at what temperature the comparison is to be made, then do a Google search (or Wikipedia) for the viscosity of each material in turn, then ...Read more
What happens when hydrogen sulphide is passed through ...
Bromine oxidises hydrogen sulphide to elemental sulphur in this redox reaction. Br2 + H2S → 2HBr + S.Read more
What chemical reaction occurs when you mix lead nitrate ...
When lead nitrate reacts with Dil.HCl, there is formation of a white precipitate of lead(II) chloride, which is soluble in hot water. Pb( NO3) ...Read more
How do you prove that tan(x) = sin(x) /cos(x)?
By remembering that tan x = sin x / cos x. This means that the right-hand side of the equation simplifies to sin x, and so the whole equation is ...Read more
What is x in x^4=16?
x^4=16 First step Convert both side in terms of power fourth. x^4=2^4 Final step Resultants value will be in both positive and negative so, ...
If you are in the 9th grade, what year would you graduate ...
If you are currently finishing your first year of high school you are class of 2021. If you will be beginning 9th grade in September, you will ...Read more
(i) CH3CH3 + Cl2→CH3CH2Cl+HCl (ii) CH3CH(OH) CH→ ...
The first equation is an example of a substitution reaction since an H2 atom has been replaced by one Cl2 atom resulting in the formation of HCl as well.Read more
What is the difference between 'couldn't stop' and 'could not ...
“I couldn't stop myself from smiling” and “I couldn't help smiling” mean the same thing. That is, someone did or said something so amusing that I wouldn't have ...Read more
Is it grammatically correct to say 'many a people'?
Either is grammatically correct. “”Many people” uses fewer words and less space, and is slightly more formal. Nonetheless, “a lot of people” is ...Read more
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