Which of these statements is NOT correct? why?
4. Is not correct because mixtures can be homogeneous or heterogeneous
Which statement is not correct regarding a mole?
A mole of 12C atoms contains 6.02 x 10^23 atoms. A mole of O2 gas contains the same number of molecules as a mole of H2 gas. Exactly 12 g. of carbon-12 is one mole of carbon-12. A mole of O2 gas has the same mass as a mole of N2 gas. The mass of one 12C atom is 12.0/6.02 x 10^23 g.
Which statement is not correct?
You can increase entropy and still have a spontaneous reaction. If there is a decrease in the energy of the system, the reaction is spontaneous. Spontaneous reactions will tend to maximize entropy and minimize the enthalpy at a given temperature Entropy can drive a reaction that is strongly endothermic. thanks!!!
Which statement about enthalpy is NOT correct?
I think it's number 4. To see whether a reaction is spontaneous or not you must look at the Gibbs free energy. Gibbs free energy has 3 components, enthalpy, entropy and temperature. The equation is: delta G = delta H - T delta S There are cases where delta H is negative and the reaction is spontaneous and vice versa. In fact if the enthalpy is negative it would be much better, as for a reaction to be spontaneous, Gibbs free energy (delta G) must be negative. If delta H is positive but T delta S is larger then delta S, The gibbs free energy would still be negatibe and the reaction would still be spontaneous.
Which statement is correct: your English is very bad or your English is worse?
Both statements are correct, however their usage depends on the situation in which they are being used! As Swarnadeep Bhattacharyya already said one is declarative and other is comparative. When you declare (no comparison involved) you can use "very bad", although when you are comparing with someone else's, you will use "worse".Hope this helps!
Which statement is correct "Does your father has a car?" or "Does your father have a car?". And please provide sufficient reason!
In a sentence where both the Main Verb and Auxiliary (Supporting) Verb are there, converting them into a Negative Sentence or an Interrogative (Question) Sentence is very easy.E.g. She is singing Tamil songs - Affirmative Sentence form.Is she singing Tamil songs ? - Interrogative Sentence form.She is not singing Tamil songs - Negative Sentence form.The problem arises when the main verb alone is there in a sentence. How do we convert them into a Negative Sentence or an Interrogative (Question) Sentence ?In such cases, it is useful to remember that every Main Verb has an implied (hidden) Auxiliary Verb within itself.This is the simple formula to remember this concept :Sing = Do + singSings = Does + singSang = Did + singHave = Do + haveHas = Does + haveHad = Did + have.Using the above formula, sentences of the following types can also be easily converted into their respective Negative and Interrogative Sentences :She sings Tamil songs - Affirmative Sentence form.Does she sing Tamil songs ? - Interrogative Sentence form.She does not sing Tamil songs - Negative Sentence form.Your father has a car - Affirmative Sentence form.Does your father have a car ? - Interrogative Sentence form. ( Has = Does + have )Your father does not have a car - Negative Sentence form. ( Has = Does + have )From the above illustrations it would have become clear that,“ Does your father have a car?”, is the correct form of the sentence.
Which of the following statements is not correct for an electron that has the quantum number n=4 and m=2?
which of the following statements is not correct for an electron that has the quantum number n=4 and m=2? A:the electron may have the quantum number s=+1/2 B:the electron may have the quantum number l=2 C:the electron may have the quantum number l=3 D:the electron may have the quantum number l=0,1,2,3