Answer:
55
Explanation:
25g is less dense than 80g therefore will mostly float. if you subtract 80-25 that will leave you will 55 as the difference
Answer:
You can identify an unknown substance by measuring its density and comparing your result to a list of known densities. Density = mass/volume. . You divide the mass by the volume and compare the density to a list of known densities.
The 3 outside means to multiply the inside by that number. AL(NO2)3 has
1 N inside
1 x 3 = 3 nitrogen atoms
The molar mass of Al(NO3)3= 212.996 g/mol
nitrogen is 14 g/mol and is 19.7% if the molar mass
19.7% of 12 g = 2.354g
2.354/14 = 0.196 N
A <u>DRY ICE</u> is hole were the steam looks a lot a smoke
Animals break down food molecules to obtain energy.
The remains of producers are broken down by decomposers.
The remains of consumers are broken down by soil decomposers.