how many litres of a assumed to be 20% O2 by volume and required to burn 1000 l of propane assume all gas volumes are measured at the same temperature and pressure​

what is the general relationship between a galaxy's distance from earth and its speed?

the answer is:

the farther away a galaxy is from us, the faster it is moving away from us.

no statements shown

the atomic number of carbon is six, which means that a carbon atom has six protons. carbon has three naturally occurring isotopes: carbon-12, carbon-13, and carbon-14. which of these statements are true about carbon and its isotopes? select all that appl

i think its 100.

hope this !

i believe the answer is three water molecules