Law of definite composition states that the elements in a given compound are always combined in the same proportion by mass. This law form the basis for the definition of a chemical compound.
Answer:
The Earth's rotation on its axis
It changes when you have started pushing the rock because at that moment it has started moving
The given question is incomplete, the complete question is:
The LD50 value for ethyl alcohol given orally to rats is 10.3 g/kg. What volume in milliliters of 100 proof vodka (50% v/v ethanol) would be likely to kill a typical 360-g rat?
Answer:
The correct answer is 9.4 ml.
Explanation:
Based on the given information, in rats the LD50 of ethyl alcohol is 10.3 g/kg.
As 1 Kg is 1000 grams
Now the value of LD50 of ethyl alcohol in rats is 10.3 grams/ 1000 grams
The volume of the lethal dose of vodka for a 360 gram rat would be,
= 360 g × (10.3 g/1000 g)
= 3708 × 10⁻³ g
= 3.708 g
Now the volume of vodka can be determined by using the formula,
V = mass/density
The density of ethanol is 0.789 g/ml
The volume would be,
V = 3.708 g/0.789 g/ml
V = 4.70 ml
As 50 percent of Vodka is ethanol, the volume of vodka needed to kill a rat is,
= 2 × Volume of ethanol
= 2 × 4.70 g/ml
= 9.4 ml
V1/T1 =V2/T2 (using charles law)
V1=6.00
V2=?
T1=273
T2=273
Making V2 the subject of formula the equation then becomes
V2= V1xT2/T1
6.00x263/273=6.0L
