A few days ago
Fermin T

Can someone help me with my Physics homework?

These are the problems if someone can help me and tell me how to work them out, please

1) 2.5*10^26 molecules=_____________ moles

2) 100 Liters=_____________ molecules

3) 7.5*10^3 mL=_____________ liters

i did the rest but i didn’t understand these can anyone help me please!!

Top 2 Answers
A few days ago
shannon3lc

Favorite Answer

OK there are 6.02 x 10^23 molecules in a mole.

There are 1000 mL in a liter.

To find the number of molecules in 100 liters you must know the material that the liter is composed of.

so (2.5 x 10^26 molecules) / (6.02 x 10^23 molecules/mole) = moles

(7.5 x 10^3 mL) / (1000 mL/L) = liters

0

A few days ago
impervioustopoison
the best way to answer these sought of ques is to convert eveything into moles

molecule to moles= no.of molecules / avogadro number

avogadro number is6.02×10^23

litres to mole then moles to molecules

from litres to moles divide by 24 for rtp and 22.4 for stp once u divide you would get the number of moles then multiply thses number of moles with avogadro number to get number of molecules

from mL to litres juz divide by 1000

0