Answer:
Twin city die castings company makes metal parts for other car manufacturing companies. Currently, due to the pandemic outbreak the company has been in contract with General Motors, producing tiny pistons for the production of ventilators by General Motors.
According to this formula :
ΔTf= i Kf m
i is van't Hoff factor= 1
Kf = 1.86
m the molality we need to assume it
m= x moles of C2H5OH / Kg of mass
∴ 15 = 1 * 1.86 * ( x moles of C2H5OH/ 0.45 kg)
∴X = 3.629 moles
mass = no.of moles x molar mass of C2H5OH
= 3.629 X 46 = 167 g
∴the volume = mass / denisty
= 167 / 0.7893 = 211.57≈ 212 mL
Answer:
The answer is C.
Explanation:
because measuring the pH of a substance is a chemical property. The substance must react with the litmus paper to determine its adcidity
If it’s not katrina, it’s bob. katrina’s is right because gravity is keeping the bird on the perch, but the perch is also holding the bird off of the ground.
A. Mg and Ca
They have similar reactive properties; they’re both Alkaline Earth metals.