Answer:
4
Explanation: on the left side of the equation there are 4 carbons, to make 4 carbons on the right side of the equation you need 4 of the CO2 molecules.
Answer:
7+9.86+.56=17.42, 100-17.42= 82.58%
Explanation:
Add them all together then minus by 100%
Boron:atomic number-5,valency-+3,atomic mass- 11amu
The density of properties will not increase by changing the amount of materials, but only will change if temperature changes because it is the weight <em>per cubic centimeter</em>. For example if you have 20000 grams of gold and its volume is 1040 cubic centimeters, but you also have 550 grams of gold which has a volume of 28.5 cubic centimeters the calculations prove it;
20,000/1040= 19.2 grams per cubic centimeter
as well as 550/28.5= 19.2 grams per cubic centimeter.
