Answer:
Explanation:
From the given information:
Since 300 ml of intravenous infusion contains 300 mg of drugs;
Then; 1 ml of intravenous infusion contains (x) amount of drugs
(x) amount of drugs = (300 mg × 1 ml)/ 300 ml
(x) amount of drugs = 1 mg.ml
To calculate the drip rate in drops/minutes by applying conversion factors.
Answer:
A. Repel
Explanation:
A magnet comprises of north and south poles.
When the south magnetic poles of two magnets are brought together, the magnets will repel because they are like charges and like
charges repel each other.
But when the north magnetic pole of one magnet is brought together with the South Pole of another magnet, both magnets will attract because they have different charges + and - . Positive and negative charges attract .
Answer:
P2O3
Explanation:
Firstly, we know that the phosphorus would absorb oxygen from air to form its oxide. We already know the mass of the phosphorus, we can get the mass of the oxygen by subtracting the mass of the phosphorus from the mass of the oxide.
The mass of the oxygen is 2.57 - 1.45 = 1.12g
From here, we covert these masses to moles by dividing by the atomic masses of phosphorus and oxygen respectively.
The atomic mass of phosphorus is 31 while that of oxygen is 16.
P = 1.45/31 = 0.046774193548
O = 1.12/16 = 0.07
We now divide by the smallest which is that of phosphorus.
P = 0.046774193548/ 0.046774193548= 1
O = 0.07/ 0.046774193548 = 1.5
We then multiply the answers by 2 for conversion to whole numbers. Making P = 2 and O = 3
The empirical formula is thus P2O3
Conductivity is a measurement of the ability of an aqueous solution to transfer an electrical current.
Explanation:
To calculate the conductivity of a solution you simply multiply the concentration of each ion in solution by its molar conductivity and charge then add these values for all ions in solution.
Answer: 109.5g
Explanation:
Mg + 2HCl —> MgCl2 + H2
From the equation,
1mole of Mg required 2moles of HCl
Therefore 1.5moles of Mg will require = 1.5 x 2 = 3 moles of HCl.
Molar Mass of HCl = 1+35.5 =36.5g/mol
Mass conc. Of HCl = 3 x 36.5 = 109.5g
