When a 25.00 ml volumetric flask weighing 20.340 g is filled partially with metal shot the mass is 119.691 g. the flask is then filled to the 25.00 ml mark with methanol (d = 0.791 g/cm3) and has a total mass of 130.410 g. what is the density of the metal?

8.7 g/ml

Explanation:

We now that we can calculate the density using the equation d= m/v

d stand for density

m stands for mass

V stands for volume

Take in mind:

volumetric flask + metal = 119.691 g

volumetric flask has a capacity of 25 ml, so

25ml = volume of metal + volume of ethanol

mass of the metal= mass of flask with metal - mass of the volumetric flask

mass of the metal = 119.691 g - 20.340 g = 99.351

g solvent= g flask with metal and ethanol - g of flask with metal.

g solvent= 130.410 g - 119.691 g = 10.719 g of ethanol.

ml sovent = or 13.55 ml of ethanol

volume of the metal = 25 ml - 13.55 ml of ethanol = 14.45 ml of metal

calculate how many grams of ammonia can be produced from 4.21 grams of

n2 + 3h2 = 2nh3

my answer:

25.0g n2 x (1 mol/ 28.0gn2) x (2 mol nh3/ 1 mol n2) x (17.0g nh3/ 1 molnh3) = 30.36g n2

25.0g h2 x (1 mol h2/ 2.00g h2) x (2 mol nh3/ 3 mol h2) x (17.0g nh3/ 1 mol nh3) = 141.67g h2

lr = n2

it's c. elements are placed in rows based on how may valencies electrons have.