Question

understanding
column 1: physical property (pp), chemical property (cp), physical change (pc), or chemical change (cc)?
color
rotting
reactivity with oxygen
mixing
volume
column 2: (if physical property, mark (i) for intensive, and (e) for extensive.
burning
melting point
combustibility
ductility
blending
using the three steps of solving a problem with a formula, solve the following problem.
the density of ethanol is 0.789 g/ml at 20°c. what is the mass of a sample of ethanol, at this temperature, that has a volume of 175.0 ml?

Explanation:

Step1: Identify the formula

The formula for density is $
ho=\frac{m}{V}$, where $
ho$ is density, $m$ is mass and $V$ is volume. We can re - arrange it to solve for mass: $m =
ho\times V$.

Step2: Substitute the given values

We are given that $
ho = 0.789\ g/mL$ and $V=175.0\ mL$.
$m=(0.789\ g/mL)\times(175.0\ mL)$

Step3: Calculate the mass

$m = 0.789\times175.0\ g=138.075\ g$

Answer:

$138.1\ g$ (rounded to one decimal place)