We can characterize properties of a substance to identify it because it helps us determine how the substance should be used. We can identify a substance by using physical or chemical properties. These help us by telling us which chemical we are looking at.
I hope this helps.. I wasn't sure what kind of answer you were looking for.
Aluminum Al2713 has an atomic molar mass of 27 grams per mole.
Al has 13 protons (hence number 13) and it most common isotope 14 neutrons for a total mass of 27 amu. ( The 13 electrons add no measurable mass to the atom)
Take the grams and divide by the molar mass
= 2 moles
Answer:
the basic unit of a chemical element.
Explanation:
Answer:
The annual production of carbon dioxide is 
.
Explanation:
Distance covered by each car = 5790 miles
Rate of consumption of gasoline =24. mile/gal
For every 24.1 mile 1 gallon of gasoline is used
Gasoline used by a single car by travelling 5790 miles =
Number of cars in the United states = 40.0 million = 
Total gallons of gasoline consumed by 40 million cars = 
1 gallon of gasoline produces = 9.50 kg of 
Then 
of gasoline will produce:
of
The annual production of carbon dioxide is .
Answer:
B) 244.5
Explanation:
2.62 torr =349.3046 pascals.
349.3046*0.7 sq meter = 244.5 N
