An irregularly shaped stone was lowered into a graduated cylinder holding a volume of water equal to 20.0 ml the height of the water rose to 30.2 ml if the mads of the stone was 25.0g what was its density

The density of the stone was 2.45 g/cm³.

Mass = 25.0 g

Volume = 30.2 mL –20.0 mL = 10.2 mL = 10.2 cm³

Density = mass/volume = 25.0 g/10.2 cm³ = 2.45 g/cm³

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.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer