Answer: Quantity required for a 0.125 mg dose is 2.5 ml
Explanation:
Given : Available concentration of Digoxin Elixir = 0.05 mg/ml.
That is 0.05 mg is present in 1 ml of the solution. We need to find quantity required for a 0.125 mg dose.
This can be found using unitary method.
For 0.05 mg, the quantity required is = 1ml
Thus for 1 mg , the quantity required is =
For 0.125 mg , the quantity required is =
Thus quantity required for a 0.125 mg dose is 2.5 ml
Answer : The balanced chemical reaction will be,
Explanation :
Redox reaction or Oxidation-reduction reaction : It is defined as the reaction in which the oxidation and reduction reaction takes place simultaneously.
Oxidation reaction : It is defined as the reaction in which a substance looses its electrons. In this, oxidation state of an element increases. Or we can say that in oxidation, the loss of electrons takes place.
Reduction reaction : It is defined as the reaction in which a substance gains electrons. In this, oxidation state of an element decreases. Or we can say that in reduction, the gain of electrons takes place.
Glucose on oxidation gives carbon dioxide and water as a product and some amount of energy is also released.
The balanced chemical reaction will be,
In this reaction, glucose molecule shows oxidation due to change in oxidation state of carbon from (0) to (+4) and oxygen molecule shows reduction due to change in oxidation state of oxygen from (0) to (-2).
Answer:
6. 7870 kg/m³ (3 s.f.)
7. 33.4 g (3 s.f.)
8. 12600 kg/m³ (3 s.f.)
Explanation:
6. The SI unit for density is kg/m³. Thus convert the mass to Kg and volume to m³ first.
1 kg= 1000g
1m³= 1 ×10⁶ cm³
Mass of iron bar
= 64.2g
= 64.2 ÷1000 kg
= 0.0642 kg
Volume of iron bar
= 8.16 cm³
= 8.16 ÷ 10⁶
Density of iron bar
= 7870 kg/m³ (3 s.f.)
7.
Mass
= 1.16 ×28.8
= 33.408 g
= 33.4 g (3 s.f.)
8. Volume of brick
= 12 cm³
Mass of brick
= 151 g
= 151 ÷ 1000 kg
= 0.151 kg
Density of brick
= mass ÷ volume
(3 s.f.)
<span><u>40.078 g Ca
</u></span>6.022X1023
This will convert atoms of Ca to grams
The SI base unit for amount of substance is the mole. 1 mole is equal to 1 moles Calcium Chloride, or 110.984 grams.