Answer:
750 grams is the mass of product and 34.09% is the compositions of the product.
Explanation:
Container 1 , 30% of propane by mass:
Container 2 , 60% of propane by mass:
Mass of mixture in container-1 = 1000 g
Mass of propane in 1000 g of mixture = m
m= 
Mass of mixture in container-2 = 1200 g
Mass of propane in 1200 g of mixture = m'
m'= 
After mixing 1000 grams and 1200 grams of mixture
Final mass of mixtures = 1000 g + 1200 g = 2200 g
Final mass of propane = 300 g+ 720 g = 750 g
Composition of propane after mixing of mixtures :

Plants :)
Hope this helps!
It’s baron I got it right on edg
Answer:
I can use a dichotomous key. It helps me classify objects by sorting it out with "yes" and "no" questions.
or
I can use a Punnett Square. It helps me classify what genes the offspring will receive simply by figuring out the recessive and dominant genes as well as the hetzygous and homzygous.
Now give an example of which ever chart you choose by drawing it if that is required. For the Punnett Square label each of the squares Top right Hetzygous, top left dominant, bottom left recessive, bot-tom right homzygous. And for the dichotomous key put a 5-7 length branch showing the animals that have fur, can breathe under water, what cannot or doesn't have those traits. or something similar
Hopefully this helps :)