Chemistry

Each molecule of NO2, nitrogen dioxide, consists of 1 atom of N and 2 atoms of O. If you have 0.155 g. of NO2, how many molecules of NO2 do you have ?
If you could, please include steps as to how to do the problem.
Thank you

  1. 👍 0
  2. 👎 0
  3. 👁 229
  1. How many moles NO2 do you have? That is grams/molar mass = 0.155/46.0 = about 0.003 (but you need to do it more accurately).
    1 mole NO2 contains how many molecules NO2. 1 mole of NO2 contains 6.022E23 molecules; so how many molecules NO2 do you have? That is 0.003 moles NO2 x (6.022EE23 molecules/mole) = about 2E21.

    1. 👍 0
    2. 👎 0
  2. Thank you :)
    2030000000000000000000 was the correct answer
    Part 2:
    How many atoms of N do you have ?

    1. 👍 0
    2. 👎 0
  3. Many profs will count your answer as incorrect. By placing that many zeros after the number you indicate there are 21 significant figures and that isn't correct. There are only 3 (dictated by the 0.155 gram in the initial sample) so the correct way to show this is 2.03E21.
    For the correct number of N atoms, there is 1 N per NO2 molecule; therefore, the number of atoms N is the same as the number of molecules of NO2. There will be twice that number for the number of O atoms.

    1. 👍 0
    2. 👎 0
  4. Our work is online, and I tried to enter it as 2.03E21 and it would not accept it.
    It only accepts the answer if everything is correct.
    Thank you :)

    1. 👍 0
    2. 👎 0
  5. OK. I suppose you play the game the way it works; however, 2.03E21 is the correct way of writing that number.

    1. 👍 0
    2. 👎 0
  6. Than you can be the one to tell my prof that, sir :)

    1. 👍 0
    2. 👎 0

Respond to this Question

First Name

Your Response

Similar Questions

  1. science

    1. Which statement is true about the following molecule? (1 point)The molecule is composed of four atoms.The molecule contains oxygen atoms.The molecule is water.The molecule represents an element. 2. A(n) _____________ is made up

    asked by cIATA on February 27, 2014
  2. Chemistry

    Nitrogen dioxide decomposes at 300°C via a second-order process to produce nitrogen 14) monoxide and oxygen according to the following chemical equation. 2 NO2(g) → 2 NO(g) + O2(g). A sample of NO2(g) is initially placed in a

    asked by Maylen on September 21, 2011
  3. chem

    There are eight markers in a full set, but Flora and Frank each only have seven markers.Flora is missing the red marker, and Frank is missing the blue marker.What can they do so that each has a full set of markers? * steal the

    asked by the truth (2018) on October 24, 2018
  4. chemistry

    When nitrogen dioxide (NO2) from car exhaust combines w/ water in the air it forms nitric acid (HNO3), which causes acid rain, and nitrogen monoxide. 3NO2(g)+ H2O(L)----->2HNO3(aq)+ N(g) a.How many molecules of NO2 are needed to

    asked by anonymous 78 on October 19, 2012
  5. Chemistry

    In the equation N2 + 2 O2 → 2 NO2, 14 g of nitrogen can produce how many grams of nitrogen dioxide?

    asked by Kellie on October 16, 2013
  1. physics

    An oxygen molecule consists of two oxygen atoms whose total mass is 5.3 x 10-26 kg and whose moment of inertia about an axis perpendicular to the line joining the two atoms, midway between them, is 1.82 × 10-46 kg·m2. From these

    asked by Joe on January 2, 2012
  2. Chem

    Which of the following statements is (or are) true? I Hydrogen bonds occur between two hydrogen atoms. II Hydrogen bonding occurs between a hydrogen atom and an oxygen atom within a molecule. III Hydrogen bonding requires a

    asked by Jessie on August 19, 2016
  3. Physics

    The two strands of the helix-shaped DNA molecule are held together by electrostatic forces as shown in the Figure 16-44 in the textbook. Assume that the net average charge (due to electron sharing) indicated on H and N atoms is

    asked by Adam on February 4, 2013
  4. Chemistry

    Deduce the number of nitrogen atoms in: 5.00 x 10^-3 mol of ammonia, NH3 and 4.601 g of nitrogen dioxide, NO2

    asked by Syndra on September 25, 2014
  5. Chemistry

    Nitrogen dioxide reacts with water to form nitric acid and nitrogen monoxide according to the equation: 3 NO2 (g)+ H2O (l) --> 2HNO3 (l) + NO (g) Suppose that 5 mol NO2 and 1 mol H2O combine and react completely. How many moles of

    asked by Anonymous on October 22, 2015
  6. Chemistry

    Write the chemical formulas for the compounds containing each of the following: a) one calcium atom for every two iodide atoms. b) two nitrogen atoms for every four oxygen atoms. c) one silicon atom for every two oxygen atoms. d)

    asked by Melissa on July 1, 2010

You can view more similar questions or ask a new question.