I can't understand my science homework can someone show me how to do it?
The worksheet shows me a graph, on the y-axis it shows me the mass (g) and it goes by 5's up to 45, on the x-axis it shows me the volume (mL) and it goes by 10's up to 110.
The first question says: What is the volume of a 50-gram piece of gold? The density of gold is 19.3g/cm3.
The second question says: Find the mass of a piece of iron that is 5cm long, 2 cm wide, and 1 cm thick. The density of iron is 7.8 g/cm3.
Can you show me how to do the questions?
2007-12-02 18:28:59 · 4 answers · asked by αℓωαчs и ƒσяєvєя 4 in Education & Reference ➔ Homework Help
Density = Mass / Volume....just follow the chart to find the mass for the first question, then use the mass and divide it by the density to get the volume.
for the second question, multiply the dimensions to get the volume of the iron. then use the density and multiply it to the volume and you get the mass. Cheers!
2007-12-02 18:40:39 · answer #1 · answered by Sean Lawlor 5 · 0⤊ 0⤋
Just start multipying everything! (jk)
Forget the graph, unless you need to graph your answers. That's later.
Mult the grams of gold by the density. Watch the units and you will see how it works.
The volume of the iron is 5X2X1. OK? so you get cm3, and then multiply the vol X density.
Basicly, look at the units and arrange the equation so they cancel and you end up with the needed usits.
(g/cm3 X cm3 = g)
2007-12-03 02:43:19 · answer #2 · answered by bahbdorje 6 · 0⤊ 0⤋
volume is measured in cm3, and 1 cm3 of gold weighs 19.3g, so 50g/19.3 = 2.59cm3
5x2x1 = 10cm3
10x7.8 = 78g
2007-12-03 02:37:28 · answer #3 · answered by Anonymous · 0⤊ 2⤋
i would but i have no idea. sorry
2007-12-03 02:33:11 · answer #4 · answered by happy new year 2 · 0⤊ 1⤋