relative atomic mass and relative molecular mass

Descripción

Form 4 Chemistry chapter 3.1
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Resumen del Recurso

Pregunta 1

Pregunta
The relative molecular mass of NO2 is 46. This means that
Respuesta
  • NO2 is 46 times heavier than the mass of carbon-12
  • NO2 is 46/12 times heavier than 1 atom of carbon-12
  • NO2 is equal to 1/12 of the mass of 1 atom of carbon-12
  • NO2 is 46 times heavier than 1/12 x 12 of carbon-12

Pregunta 2

Pregunta
Find out how many times three chromium atoms are heavier than 4 oxygen atoms. [Cr = 52; O=16]
Respuesta
  • 3.25
  • 2.4
  • 16
  • 52

Pregunta 3

Pregunta
the percentage content of iodine in lead(||) iodide. PbI2 is [Pb = 207; I= 127]
Respuesta
  • 55%
  • 27.5%
  • 38%
  • 76%

Pregunta 4

Pregunta
Calculate the percentage mass by weight of metal M in the compound MCl4. [RAM: M=207, Cl= 35.5]
Respuesta
  • 16.2%
  • 14.6%
  • 40.7%
  • 59.3%

Pregunta 5

Pregunta
Three elements are represented by letters X, Y, and Z. One atom of Z is three times heavier than one atomof Y. One atom of Y is 2 times heavier than one atom of X. If the RAM of Z is 210, what is the RAM of X?
Respuesta
  • 24
  • 31
  • 35
  • 60
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