Easy chem question. Please answer and explain?
Give the partial pressure of oxygen gas : Give the moles of oxygen gas produced : Give a short summary of the steps or show the major calculations used:
Quick easy ten points easy chem question answer in 5 mins help please!!?
I woudl guess 3.6*10-2P
Some Easy Chem Questions?
1.The energy of a photon is related to its: a) mass, b)speed) c) frequency d) Size 2.The Bohr model of the atom was an attempt to explain hydrogen's a) density b) flammability c) mass d) line-emission spectrum 3. The electron in a hydrogen atom has it's lowest total energy when the electron is in it's a) neutral state b) excited state c) ground state d) radiation-emitting state 4.The French scientist Louis de Broglie theorized that a) electrons could have a duel wave particle nature b) light waves did not have a duel particle nature c) the natures light of quantized orbits were not similar. 5. The spin quantum number indicates that the number of possible spin states for an electron in an orbital is a)1 b)2 c)3 d)5
An easy chem question.?
The maximum buffer capacity will occur when the concentrations of the weak acid and the conjugate base are the same. If that is the case then the pH of the buffer is equal to pKa. pKa = -log(Ka) If Ka is 3.5x10^-4, then pKa = 3.46 The optimum range will be either side of 3.46, so that would be (4).
Easy chem question.. names and formula?
Sn(SO3)2 = Tin Sulfite - tin has an oxidation number of 4+, meaning it is four to the right of a noble gas (and it isn't a transition metal. Sulfite is a polyatomic ion that has a charge of 2-. That is why you need two to match up with tin. FeCO3 = Iron Carbonate - Iron can be either 2+ or 3+, but in this case it is 2+ because the polyatomic ion carbonate has a charge of 2-. Potassium Dichromate = K2Cr2O7 - since dichromate is a polyatomic ion with charge 2-. you need two K+'s to complete it. Copper(II) nitrate = Cu(NO3)2 - Since there is a (II) after copper, that means the charge is 2+. Nitrate is NO3-, so two are needed.
Few easy chemistry questions? multiple choice?
A catalyst works by_________ 1) lowering the activation energy barrier 2) shifting the equilibrium position towards the products 3) changing the temperature of the reactants 4) changing the particle size of the reactants The rate of a chemical reaction normally_______ 1) decreases as the temperature increases 2) is slowed down by a catalyst 3) increases as reactant concentration increases 4) decreases as reactant concentration increases What expression represents a reaction rate? 1) time/mass 2) number/time 3) energy/time 4) time/energy If heat is released by a chemical system, an equal amount of heat will be ________ 1) absorbed by the surroundings 2) absorbed by the universe 3) released by the surroundings 4) released by the universe You just have to write the answers only. I don't need an explanation, but if you like to explain thats ok. Thank you very much!!!!!!!
3 "Easy" chemistry questions. HELP!!!?
1. A precipitate forms when two aqueous ions combine together in a solution and form a product that is not soluble, and so it settles out as a solid. 2. A complete ionic equation shows all of the ions in a reaction, while a net ionic equation has had the spectator ions removed so that only the ions that actually have a chemical reaction are shown. For example, if I have the reaction: AgNO3 (aq) + KCl (aq) --> AgCl (s) + KNO3 (aq) The complete ionic equation would be: Ag+ (aq) + NO3- (aq) + K+ (aq) + Cl- (aq) --> AgCl (s) + K+ (aq) + NO3- (aq) Since the K+ and the NO3- show up on both sides of the complete ionic equation, they are spectator ions, and can be removed to form the net ionic equation: Ag+ (aq) + Cl- (aq) --> AgCl (s) 3. Usually, complete and net ionic equations are used specifically for precipitation and neutralization reactions, and I can think of no example in which the complete and net ionic equations would be the same.
Easy chem question, boiling point and evaporation.?
the elements in water, such as salt, can lower the boiling temp, and melting point. Air pressure effects it too. The boiling point is 95 celcius in Denver. I dont know the other thing sorry
What are the simple tricks to crack physics and chemistry questions in NEET?
Hmm. It all matters on your concept. Some question which look tough are actually preety easy (if you know the basics)Try to be conceptully sound. Like my teacher always said, a tall strong building cannot be built unless it has a strong foundation. That foundation is your concept. So build it up, reinforce it and make it strong. Try to use Ambuja Cement (wink)Whenever you are facing a numerical, always think about the simplest method you can take. Often our mind tricks us imto believing that we have to use a more advanced formula to solve a particular problem. That is not always the case. So be wary of this deception. Chalk out the most easy amd most straight forward path.For Physics. I would say be thorough with the second year portion absolutely from head to tail. Don't ignore modern physics. Preety easy questions are set from that portion in my experience and should not be much trouble. Don't ignore Thermodynamics. I ignored that part and trust me it was not preety.For Chemistry. Be thorough with O chem and the inorganic part. If a chapter looks easy, then its bound to trouble you. And the golden rule as suggested by my father, read once write thrice. That way you can retain more.Quality has more weight than quantity. It does not matter if you study for four hours or for fourteen hours. What does matter is how productive the session is.Be thorough with NCERT. I guess this does not require an explanation.Last of all have faith. Sometimes you will feel like I know nothing. Don't let that deter you. You know what you are capable of. So have that faith always. Keep the fire alive.And don't be so tensed dude. Take it easy. Amd enjoy it as you are at it. If you enjoy the thing, you will retain more.And hey! Just before the NEET, try out the 40 Days Series by Arihant Publications. It's a good book for quick revisions. I found it quite useful.All the best bro.Hope this answer helped you.
Maximum Amounts - EASY CHEMISTRY QUESTION - EASY BEST ANSWER?
Another limiting - excess type of question. In the first question balanced equation and the moles of the reactants are given. Therefore it is easy as you said. N2 + 3H2 ---> 2 NH3 The equation atates that for each mole of N2, you will need 3 moles of H2. For 5 moles of N2 , you will need 5 x 3 = 15 moles of H2. But you have only 10 moles of H2. It is not sufficent to consume all N2 present. Therefore H2 is limiting and N2 is excess. As I told you before, the amount of product depends on the limiting reagent. According to the equation again, 3 moles of H2 produces 2 moles of NH3. 10 moles of H2 will produce; 2 mol NH3 x ( 10 mol H2 / 3 mol H2 ) = 6.667 mol NH3 The word "amount" is not good for a question, because it covers everything. One may state that " The maximum amount of NH3 produced is 6.667 mol" If the other one knows the molar mass (17 g/mol) may say that " The maximum amount of NH3 produced is 6.667 mol x 17 g/mol = 113.33 g". The third one may say that " The maximum amount of NH3 produced is 6.667 mol x 22.4 L/mol = 149.34 L at STP". All these three are the possible answers of this question. Second question: First write the equation of the reaction and balance it: 2NO + O2 -----> 2NO2 In the first question we compared the moles. In this case let's compare the masses. Molar mass of NO = 30 g/mol Molar mass of O2 = 32 g/mol Molar mass of NO2 = 46 g/mol According to the equation 2 mol NO ( 2 x 30 = 60 g) reacts with 1 mol O2 ( 32 g ), 10 g NO reacts with; 32 g O2 x (10 g NO / 60 g NO) = 5.33 g O2. But we have more than this amount (20 g). Therefore O2 is excess and NO is limiting. According to the equation 2 mol NO ( 2 x 30 = 60 g) produce 2 mol NO2 ( 2 x 46 = 92 g ), 10 g NO will produce; 92 g NO2 x (10 g NO / 60 g NO) = 15.33 g NO2.