**Peas and Rice Lab **Name
____________________________________

Partners’
Name ____________________________

The triple beam balance is not
sensitive enough to weigh an individual pea or an individual grain of rice,
just like it could not weigh an individual atom. We will measured a group of
rice and a group of peas and use this to calculate. We are going to call our group a *heap*, and one *heap* is 37 pieces

Remember you don’t put chemicals directly on the
balance so you will need to weigh an empty container first. Remember to estimate
to the second decimal place on the balance. After you have recorded the data,
describe how you went about answering the other questions. Show your work and
include the units.

**Data Table**

Mass
of empty container ________________

Mass
of container and 37 grains of rice ________________ this is one heap of
rice

Mass
of container and 37 peas ________________ this is one
heap of beans

**Calculations**

Describe
how you came up with the answers to the following questions. When doing the
math, show your work and include the units.

1. How much does one heap of
rice weigh?

2. How much does
one heap peas weigh?

Use
conversion factors for the following problems

3. How much does 1000 grains of
rice weigh?

4. How much does one mole of
rice weigh?

5. If you had a jar that
weighed 54 g when empty and 814 g when full of rice, how many grains of rice
would it hold?

6. How much does
one million peas weigh?

7. How much does one mole of
peas weigh

8. The same jar in number 5
weighs 762 g hen filled with peas. How many peas does it hold?