You need the density of the rock first.
I searched
density rock
and got about 3g/cm³ for a general number.
But that is not for a loose pale of rocks. (ie no air)
Mass = density x volume
density and volume need to be in the same units.
so you need to convert a gallon into ft^3 or cubic feet
Using
1 gallon in ft^3
(refer below)
then convert 3 g/cm³ into pounds/ft^3
using
3 g/cm^3 in pounds/ft^3
(refer below)
then you multiply. Notice how in your calculation the ft³ cancel each other.
***Except for the answer, the below was copied and pasted.***
To answer conversion questions like this go to Google.com and in the search window, type in your question like this..
24 cups in gallons
or this
450 ft^3 in cubic yards
or this
39200 cm in km
and it will give you a direct answer without doing a search.
It is great for this.
In your case type in
??????????????
Note, you can also use the Google search window as a calculator. You might type in
(7+7.8)*23.5 x 54^2 x sqrt 5 =
If this is a homework question, the below is a very powerful and easy method to convert numbers from one unit to another.
Let us take an easy example.
Say you have 2.7 meters and you want to convert it to centimeters.
You know that 1m = 100 cm
Think about how we can take the equation 1m = 100 cm and divide both side by "1m" and get 1= 100 cm/m. (We have "re-arranged" the equation.)
Now think about how it is that if you multiply 2.7m by the number 1 you simply get 2.7m again.
Now think about how since "100 cm/m" equals 1 because 1= 100 cm/m you can multiply 2.7 m by "100 cm/m" and you will have the same distance. The only difference is that after you cancel out the meters the distance will be expressed in different units.
Here it is expresses mathematically...
2.7m = 2.7m X 1 = 2.7m X 100 cm/m = 270 cm. Notice how the meters cancel each other out and you are left with centimeters.
This always works
Here is a harder example.
Convert the speed 8,100 m/s to the units of km/hr
As discussed above since 1000m = 1 km, we will in this case divide both sides of the equation by "1000m" and get 1=(1/1000)km/m.
when we multiply by that and cancel out the meters, we get 8,100 m/s = 8.1 km/s.
(Note that we could have taken the equation 1000m = 1 km and divided both sides by "1km" to get 1 =1000m/km and then DIVIDED by 1000km/m and the meters would have still canceled out. Here is the math 8,100m/s = 8,100m/s / 1 = 8,100m/s / 1000m/km = 8.1 km/s )
Now to convert the seconds to hours we first convert the seconds to minutes by taking the equation 1min = 60s and dividing both sides by "1min" to get the equation 1 = 60s/min
When we multiply 8.1 km/s by the above we get 480 km/min
We do the same thing with the equation 1hr = 60 min to get 1 = 60 min/hr and when we multiply, we get 28,800 km/hr which is in the correct units.
For some reason it is not the law for physic teachers to tell their students about this method.
Here is website that goes into it in more detail.
http://oakroadsystems.com/math/convert.htm#Intro
Wikipedia.org, "The World's Encyclopedia"
and got
amount of bentonite clay per gallon of brine can range from about 0.25 to about 2 pounds of clay per gallon.
According to the CRC Handbook of Chemistry and Physics (60th Edition), a cubic foot of clay weighs 112 to 162 pounds. A cubic yard would weigh 27 times as much.
1 gallon of gasoline equals 5.8 to 6.5 lbs.
Between 8.34 and 9.0 pounds per US gallon, depending on the alcohol content (heavier for low alcohol wine). Water weighs about 8.34 pounds a gallon, and wine after fermenting may have the same specific gravity as water. Although the weight is increased by dissolved solids, it is reduced by the alcohol content, as alcohol weighs less than water. During the winemaking process, wine can weigh as much as 9 pounds or more.
They weigh 185.2 pounds.
1 gallon = 4 quarts 1 quart = 0.25 gallon
Gallons can be converted into many units but most common is gram.The conversion relations between gallon and g are given .By the conversion as follows: 1 gallon = 3785.4118 g. Hence, 4 gallons =15141.6472gm.
1 gallon of gasoline equals 5.8 to 6.5 lbs.
8.33
8
How much does 4000 ml weigh in pounds
Approximately 8.3 pounds.
About 8.53 pounds.
8,000,000 pounds
5
It weighs 5 pounds:)
How much does a gallon of sour cream weigh
3499
There are eight pints in a gallon. Therefore, a gallon of milk is going to weight approximately eight pounds.