Answer:
ask them. it doesn't really hurt to.
Answer:
35g/l
Explanation:
Salinity is practically the saltiness of the water, in basic terms. It's basically the amount of salt dissolved in water. Ocean water has a salinity of around 35g/l (that's about 3.5% of which is dissolved salt in water!). However, Atlantic Ocean (the ocean with the saltiest water), can range up to 37g/l.
<em>Feel free to mark this as brainliest :D</em>
Answer:
4 tabletes/dose
Explanation:
mass person = (90 Lb)×(Kg/2.20462 Lb) = 40.823 Kg body
amount of medicine = 50 mg/Kg body.day
frecuency = 2 dose/day
⇒ amount of medicine/day = (50 mg/kg body.day)×(40.823 Kg body) = 2041.168 mg/day
⇒ mg medicine/dose = (20141.168 mg/day)×(day/ 2 dose) = 1020.584 mg medicine/dose
∴ mg medicine/tablet = 250 mg medicine/tablet
⇒ # tabletes/dose = (1020.584 mg medicine/dose)×(tablet/250 mg medicine) = 4.082 tabletes/dose
⇒ # tabletes/dose ≅ 4 tabletes/dose
Answer:
The answer to your question is letter D
Explanation:
Data
mass of Li = 4.5 g
mass of N₂ = 4.5 g
limiting reactant = ?
Reaction
6Li (s) + N₂ (g) ⇒ 2Li₃N
This reaction is balanced
Process
1.- Calculate the molecular mass of the reactants
Li = 7 x 6 = 42g
N = 14 x 2 = 28 g
Calculate the limiting reactant using proportions
Theoretical proportion Li / N = 42 / 28 = 1.5
Experimental proportion Li/N = 4.5/4.5 = 1
As the experimental proportion was lower than the theoretical, the limiting reactant is Lithium
2.- Calculate the theoretical yield of Li₃N
42 g of lithium -------------- 70 g of Li₃N
4.5 g of lithium ------------- x
x = (4.5 x 70) / 42
x = 315 / 42
<u> x = 7.5 %</u>
Explanation:
mole = mass in g/ molecular weight
molecular weight of Al2O3 =2(13) + 3(16) =74g/mol
reacting mass = 27 g
mole = 27/74 = 0.36mol