A is correct................
Answer:
The acid dissociation constant, _Ka__, is a quantitative measure of acid strength
Explanation:
Answer:
Joan should measure 0.625 mL of 2,12 M HCl solution to create her desired solution.
Explanation:
Molarity of HCl Joan has access to = 
Volume of 2.12 M of HCl Joan use = 
Molarity of HCl Joan desired = 
Volume of 0.053 M of HCl Joan can prepare = 



Joan should measure 0.625 mL of 2,12 M HCl solution to create her desired solution.
Answer:
Rubidium is a typical but very reactive member of the series of alkali metals. It is appreciably more reactive than potassium, but less so than caesium, and so would be expected to react more violently with those materials that are hazardous with potassium or sodium.
Since the molar ratio of N2 to Nh3 is 2:1, you can make twice as much NH3 by using N2. Therefore, you can make a maximum of 4.5 mol of NH3 assuming 100% yield.