Answer:
There should be added 24.33g of EDTA
Explanation:
EDTA + Ca2+ → Ca(EDTA)
MM of EDTA = 292.24g/mole
MM of Ca2+ =40g/mole
An aqueos waste contains 20 mg/L Calcium, and collects the waste in 44 gallon drums.
The concentration of Ca2+ ions = 20mg/L = 0.02g/L
We know 1 gallon = 3.785L
The mass of calcium ions is in 44 gallons
⇒44 gallons = 3.785 * 44 = 166.54 L
Since the aqueous waste contains 0.02g/L calcium
in 44 gallons or 166.54 L ⇒ 166.54 * 0.02g = 3.308g
MM of Ca2+ = 40g/mole
⇒40g of Ca2+ reacts with 292.24g of EDTA
⇒ (292.24/40 ) * 3.308g = 24.33 g
There should be added 24.33g of EDTA
I think it’s kinetic energy, sorry if I’m wrong.
The correct option is D.
Engineers and constructions workers have different types of footwear, which they make use of when they are in the field. Each of these foot wears has its own purpose and functions. For instance, the steel toe boots serve to protect the foot from falling falling objects and also from compression. The foot wear has a protective support in the toe and also possesses a mid sole plate to protect the foot again puncture from the sole.
Answer:
Explanation:
fluorine have gained one electron that is why the sign is -1. they both have different number of protons. They have different neutron numbers. F have 10 and O have 8.
hope this helps :)
Best Answer: 4.52 X 10²³ atoms. Use Avogadro's number to multiply 0.750 moles times 6.022 X 10²³
