Chemistry Homework Answers & Questions

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  • Waiting for answer Fe2O3 + 3C → 2Fe + 3CO; how many grams of C are needed to re...

    1. In the following reaction:  Fe2O3 + 3C → 2Fe + 3CO;how many grams of C are needed to react with 16.5 g Fe2O3?2. Give an example of a physical change and chemicalchange.3.  A sampleof nitrogen (N2) has a volume of 50.0 L at a pressure of 760 mmHg.What is the volume of the gas when the pressure cha...

  • Waiting for answer Bovine spongiform encephalopathy (BSE), Biochemistry homewor...

    Introduction:Bovine spongiform encephalopathy (BSE), also known as mad cow disease, is a worldwide problem. While the United States and many countries in the European Union have regulatory legislation in place to combat the spread of BSE, many other countries do not yet have the ability to enact suc...

  • Waiting for answer Calcium carbide, CaC2 reacts with water to form acetylene, h...

    Molecular Formula Practice1. Calcium carbide, CaC2 reacts withwater to form acetylene. CaC2(s) + 2H20(l)   C2H2(g)+ Ca(OH)2(s)a. How many grams of water are needed to react with485 g of calcium carbide?b. How many grams of CaC2 could make23.6 g C2H2?c. If 55.3 g Ca(OH)2 are formed, howmany grams of...

  • Waiting for answer The pH of an aqueous solution of 0.245 M potassium hypochlor...

    The pH of an aqueous solution of 0.245 M potassium hypochlorite, KClO (aq), is .This solution is _________acidicbasicneutral

  • Answered 3. True or false? Acids have a pH level below 7.

    3. True or false? Acids have a pH level below 7.

  • Waiting for answer Need help with Chemistry Limiting Reactant

    1.    4NH3 + 5O2  4NO +6H2OIn an experiment, 3.25 g of NH3 are allowed to react with 3.50 g of O2.  How many grams of NO are formed?Please round final answers to the tenth position, one place after the decimal. Please remember your units.2.   2 CuCl2 + 2 NaNO3  --- Cu(NO3)2 + 2 NaClIf 15 grams of c...

  • Waiting for answer Write a net ionic equation to show that acetic acid , CH3COO...

    Write a net ionic equation to show that acetic acid , CH3COOH , behaves as an acid in water.

  • Waiting for answer Multiple Choice: What is the molarity of the KOH solution?

    A 20.0 mL sample of 0.15 M hydrochloric acid (HCl) is needed to neutralize a 10.0 mL sample ofpotassium hydroxide (KOH). A balanced equation for the reaction is shown below.HCl + KOH --- KCl + H2O What is the molarity of the KOH solution?A. 0.15 MB. 0.30 MC. 0.60 MD. 0.75 M

  • Answered What is the centre of an atom called?

    What is the centre of an atom called? give a brief explanation that will help me understand it in detail

  • Waiting for answer An ion from a given element has 34 protons and 36 electrons,...

    An ion from a given element has 34 protons and 36 electrons.What is the charge on the ion? What is the name of the element? What is the symbol for the ion?

  • Waiting for answer Chemistry Assignments

    Assignment: Propertiesi will send  the images separately For each of the objects list six physical properties of the object.Identify each property as extensive (E) or intensive (I) and describe how you know it is an intensive or extensive physical property.Then, select one property you identified fo...

  • Waiting for answer Diffusion and Effusion, chemistry homework help

    If a molecule of neon gas travels at an average of 400 m/s at a giventemperature, estimate the average speed of a molecule of butane gas, C4H10, at the same temperature.* Find the ratio of Ne to butane then use that to determine speed

  • Waiting for answer Chemistry lab homework help

    i need it in 4 hours pls. the info in a file below

  • Waiting for answer Write the balanced NET IONIC equation for the reaction that...

    Write the balanced NET IONIC equation for the reaction that occurs whenammonium nitrate and barium hydroxide are combined.(aq)(s)(l)(g)+(aq)(s)(l)(g)[img src="http://cxp.cengage.com/contentservice/assets/T=1432835562037/owms01h/mediaarchives/GenChem/Image/Arrow.gif" (aq)(s)(l)(g)+(aq)(s)(l)(g)+(aq)(...

  • Waiting for answer chemistry behind soap cleaning process

    Answer this question from purely chemical point of view, show reaction if necessary :how does soap clean?no philosophical answers ...

  • Waiting for answer Under certain conditions, the substance mercury(II) oxide ca...

    Under certain conditions, the substance mercury(II) oxide can be broken down to form mercury and oxygen.If 26.7 grams of mercury(II) oxide react to form 24.7 grams of mercury, how many grams of oxygen must simultaneously be formed? grams oxygen

  • Waiting for answer Nuclear Chemistry, assignment help

    I need help with this homework assignment

  • Answered fountain experiment

    define fountain experiment

  • Waiting for answer Equation is NaCl + AgNO3 ---> Agcl + NaNO3, chemistry pro...

    I wanted to make sure I did this right, and if not, I need to know where I messed up. My answer on percent seems a little high to me. The question is Chloride ion (in table salt, NaCl) is measured in food products by titrating AgNO3. You take 1.00mL of the food material and titrate it against 5.66 m...

  • Waiting for answer 1) CH3COO- (aq) + HClO (aq) CH3COOH (aq) + ClO- (aq) 2) C9H7...

    CH3COO-HC9H7O4HClOC9H7O4-CH3COOHClO-strongest acidintermediate acidweakest acidnot a Bronsted-Lowry acid

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