A compound has to have at least two different elements in
(1) is the only list in which each of the three symbols representations show at least two different elements
Answer:
<h2>The answer is 1.99 g/mL</h2>
Explanation:
The density of a substance can be found by using the formula

From the question
mass of acid = 60.19 g
volume = 30.2 mL
The density is

We have the final answer as
<h3>1.99 g/mL</h3>
Hope this helps you
Answer:
pH= 9.2
Explanation:
Henderson hasselbach equation
pKa= log Ka= log (4.9 x 10^-10)=9.3
![pH=Pka+log \frac{[A-]}{[HA]}](https://tex.z-dn.net/?f=pH%3DPka%2Blog%20%5Cfrac%7B%5BA-%5D%7D%7B%5BHA%5D%7D)
![pH=9.3+log \frac{[CN-]}{[HCN]}](https://tex.z-dn.net/?f=pH%3D9.3%2Blog%20%5Cfrac%7B%5BCN-%5D%7D%7B%5BHCN%5D%7D)
![pH=9.3+log \frac{[0.64 M]}{[0.83 M]}](https://tex.z-dn.net/?f=pH%3D9.3%2Blog%20%5Cfrac%7B%5B0.64%20M%5D%7D%7B%5B0.83%20M%5D%7D)
pH= 9.2
Calcium will lose 2 electrons to gain a full outer shell.
This will form a positive ion.