Answer:
r² x h
Explanation:
A can is cylindrical in nature. Using the formula of the volume of the can, we can find this unknown volume.
The volume of cylinder is given as:
Volume of a cylinder = Area x height
Volume of a cylinder =
r² x h
Therefore density of the can;
Density = ![\frac{mass}{volume}](https://tex.z-dn.net/?f=%5Cfrac%7Bmass%7D%7Bvolume%7D)
Na 2Co3
1*23=23. 2*12=24. 6*16=96
23+24+96=143
(23*100)/143. (24*100)/143. (96*100)/143
=16%. =16.7%. =67.1%
Answer:
D. ![2NaBr + Cl_2\rightarrow 2NaCl + Br_2](https://tex.z-dn.net/?f=2NaBr%20%2B%20Cl_2%5Crightarrow%202NaCl%20%2B%20Br_2)
Explanation:
Hello!
In this case, for the given set of chemical reactions, it is possible to infer that D. is a categorized as redox due to the following:
Since both chlorine and bromine remain as diatomic gases, their oxidation states in such a form is 0, but as anions with lithium cations they have a charge of - according to the following reaction and half-reactions:
![2NaBr + Cl_2\rightarrow 2NaCl + Br_2](https://tex.z-dn.net/?f=2NaBr%20%2B%20Cl_2%5Crightarrow%202NaCl%20%2B%20Br_2)
![Cl_2^0+2e^-\rightarrow 2Cl ^-\\\\2Br^- \rightarrow Br_2^0+2e^-](https://tex.z-dn.net/?f=Cl_2%5E0%2B2e%5E-%5Crightarrow%202Cl%20%5E-%5C%5C%5C%5C2Br%5E-%20%5Crightarrow%20%20Br_2%5E0%2B2e%5E-)
Unlike the other reactions whereas no change in the oxidation states is evidenced.
The half-life of carbon-14 is about 5730 years