The combined total mass in grams of a beaker and pure water is 95.175g
1. Find the Volume of water in liters(hint: water has a density of 1g/mL)
2. What is the density (g/mL) of a solid with a mass of 4.75g and a volume of 6.2mL?
3. Find the mass (g) of a sample if 257mL of it has a specific gravity of 1.75?
4. Design an experiment to determine the density of lead and that of aluminum. Predict which one of the two metals has a higher density and explain your answers. (Hint: read this experiment carefully before you answer)
2007-09-11 05:03:59 · 5 answers · asked by Gumby 1 in Science & Mathematics ➔ Chemistry
1. Density = mass/volume, but you need to know mass of beaker.
2. Same formula
3. Specific Gravity (SG) = Density of liquid / Density of water
1.75 = (m / 257mL) / 1g/mL
1.75 = m / 257 (1g) (cancel out mL)
(1.75)(257)(1g) = m
m = 449.75g
4. I think if you weigh each metal and place each one in a set volume of water, then you can determine its density, since Density = mass/volume.
2007-09-11 05:08:14 · answer #1 · answered by jemt113 2 · 1⤊ 0⤋
1) 95.175ml
2) volume=mass * density, density=mass/volume= 4.75/6.2=0.766g/mL
3)mass=257/1.75=146.857gms
4)lead has higher density than aluminium. take aluminium block preffereably cuboidal. we can get idea of volume from it's dimensions. weight it on a scale against a beaker containing water. we know the density of water to be 1gm/mL. knowing the volume of water from the dimensions of beaker. we get to know the volume of water & hence it's mass. thus density of aluminium can be calculated since we know the mass of water equals mass of aluminium on a weighing scale.
repeat the experiment with a lead block
2007-09-11 05:18:36 · answer #2 · answered by karan s 3 · 0⤊ 0⤋
Density = Mass / Volume.
That's the formula you need.
2007-09-11 05:09:11 · answer #3 · answered by ag_iitkgp 7 · 0⤊ 0⤋
1. you have to know the mass of the beaker, subtract it from 95.175g. the difference is the mass of water, then divide by 1g/mL and there's your volume.
2. divide 4.75g with 6.2mL
3. mulitiply 1.75 by 257
4. duh? you have to do this yourself
2007-09-11 05:15:20 · answer #4 · answered by doraemon003 2 · 0⤊ 0⤋
1. D = m/v
Find mass of beaker, subtract it from 97.175g and
v=m/D
2.D = M/V
2007-09-11 06:10:34 · answer #5 · answered by Wonder 2 · 0⤊ 0⤋