Most popular questions and responses by KIEN
  1. Chemistry

    Express 900.00 in scientific notation

    asked on June 16, 2018

    A 5.00-g bullet is fired into a 500-g block of wood suspended as a ballistic pendulum. The combined mass swings up to a height of 10.00 cm. What was the magnitude of the momentum of the combined mass immediately after the collision?

    asked on October 31, 2012
  3. Chemistry

    12.976 g of lead combines with 2.004 g of oxygen to form PbO2 . PbO2 can also be produced by heating lead nitrate and it was found that the percentage of oxygen present in PbO2 is 13.38%. With the help of given information,illustrate the law of constant

    asked on June 17, 2018
  4. Chemistry

    Suppose the elements x and y combine to form two compounds xy2 and x3y2. When 0.1 mole of xy2 weighs 10g and 0.05 mole of x3y2 weighs 9g, the atomic weight of x and y are a) 40,30 b) 60,40 c) 20,30 d) 30,20

    asked on June 20, 2018
  1. math

    B:3 and You multiply the number and add the decimal and put it on the answer you got.

    posted on October 14, 2013

    Ans: 0.707 Kg m/sec

    posted on October 31, 2012