Can you please help me with these sicence/ math problem. Tellme if my number 1 is correct.?

Question

1. Wood has a density of 5.53g/mL. What is the volume of 33.3 g of wood? my answer 6.02

2.Copper has a density of 4.44g/L. What is the mass of 1.4 L? my answer 3.40

3. What is the density of a piece of a iron that has a mass of 59.8 g and a volume of 2.08 mL? Didn't come up with a answer.

4. Granite has a density of 4.67 g/mL. What is the mass of 46.8 mL of granite? Didn't come up with a answer.

5. What is the density of a ample of mercury that has a mass of 39.6 g and a volume of 9.00 mL? Didn't come up with a answer.

6.Sodium has a density of 1.95 g/mL. What is the volume of 56.2 g of sodium?

Answer 1

1. correct

2. 6.22g  you multiply 4.44 by 1.4

3. 28.75g/mL

4.218.56g

5. 4.4g/mL

6. 28.82mL

you better gimmie 10 points for doing your homework

Answer 2

1- 33,3g / [ 5,53 g / mL ] = 6,02 mL



2- 1,4 L · 4,44 g/L = 6,216 g

3- density = mass / volume = 59,8g / 2,08 mL = 28,75 g/mL

4- 46,8 mL · 4,67 g/mL = 218,55 g/L

5- again density = 39,6g / 9,00 mL = 4,40 g/mL

6- 56,2 g / [ 1,95 g/mL ] = 28,82 mL

good luck

Answer 3

This stuff is really easy as long as you know the formula for density:

D= M/V   (Mass divided by Volume)  it's easily recognized as the M and V form a heart when put in fraction form (simple trick).

Anyways if you have a calculator at hand just do these operations:

1. 5.53 * 33.3

2. 4.44 * 1.4

3. 59.8 * 2.08

4. 46.8/4.67

5. 39.6/9

6. 56.2/1.95

Just be able to manipulate the variables within the density formula so it's in terms of other variables:

D = M/V

M = DV

M/D = V

Answer 4

Okay, so there are basically two kinds of problems here, whether they are asking for the density, or for the mass or volume.  For the first type of problem, finding the density, you just need to divide the mass by the volume.  Remember to always give correct labels.  

For example, number 3 -

59.8g/2.08mL = 28.75g/mL

The other type of problem is finding the mass or volume from the density and other characteristic.  This can be slightly more difficult, as you need to implement the use of ratios to get the answer.  The way that works is you will have 2 fractions, and will set them up to equal each other like this -

A/B = C/D

Then you can multiply the numerator of one by the denominator of the other on each side, and you will get -

A*D = C*B

You will know what the numbers are for 3 of these variables (letters), and then you can find the last one by dividing out the third.  It may sound more complicated than it really is.  Let's try number 1 as an example.  Our density is 4.44g/L, which is the same as 4.44g/1L, so we use that as one of the fractions, and we know the mass of the other, so that will be Xg/1.4L.  So we have the following -

4.44g/1L = Xg/1.4L

multiplying out gives

4.44g * 1.4L = 1L * Xg

6.216 g*L = 1X g*L

Now we can divide each side by 1L and get

X = 6.216 g

So this one is a bit off, but it looks like you had #1 right, keep working at it!

Answer 5

1) 33.3 / 5.53 = 6.02  =)

2) 4.44 * 1.4 = 6.216g

3) Mass/volume = density

59.8 / 2.08 = 28.75 g / mL

4) 4.67 * 46.8 = 218.556 g

5) 39.6 / 9 = 4.4g / mL

6) 56.2/1.95 = 28.8 mL

Westy did a good job with the answers despite the lack of explanation.