If 14.0 grams of C2H4 and 155 grams of O2 are reacted in the balanced equation below and 38.0 grams of CO2 is collected, calculate the percent yield of carbon dioxide ? C2H4 + 3 O2 2 CO2 + 2 H2O

it is to be noted that an alpha particle is an helium nucleus. so it contains 2 protons 2 neutrons and has a mass number of 4. when alpha decay particles are ejected from the nucleus it gets transformed into an atom which has atomic number less than 2 and a mass number less than 4.

an equation that could represent alpha decay is radium 226 decay of alpha particle forms radon 222.

→

in scientific notation, the value of the  speed of light in a vacuum

  will be written as 2.995 * 10^8. when this value is represented in the form of

  a * 10^b, then, a = 2.995 and b = 8.

the value of the speed of light in a vacuum given above can also be rounded up to approximately 300000000. in this case, the scientific notation will be written as 3 *10^8.

confused

confused             hewdejdnjnjsnd