Answer:
-1.5 N because 1.5 N would be upwards and -1.5 N would be downwards
The kinetic energy of the ball b is 12.3kJ and ball B to a is 14.2kj
The answer would be 19.3g/cm^3
Explanation: D=m V;D = 38.6g/2cm^3 = 19.3g/cm^3. Due to the chart, the unknown sample is gold. Gold is a soft metal that is malleable and ductile. It has a great density value, which makes it heavy metal.
P= 38.6/2 =19.3g/cm^3
The reaction between zinc and hydrogen gas is:
Zn + H₂ → ZnH₂
So for every 1 mole of H₂ gas, it needs 1 mole of Zinc. The atomic weight of H2₂ is 2 g/mol, and Zinc is 67.425 g/mol. The density of H₂ at atmospheric pressure and at 293 K is 0.00016 g/mL. The solution is as follows:
Mass = Density*Volume = (0.00016 g/mL)(150 mL) = 0.024 g H₂
Moles H₂ = 0.024 g H₂ * 1 mol/2 g = 0.012 mol H₂
Thus, it also needs 0.012 mol Zn.
Mass of Zn needed = 0.012 mol * 67.425 g/mol = <em>0.8091 g Zn</em>
The answer is B, maltose.
Maltose is a disaccharide, composed of two monosaccharide. It can be broken down by amylase, a enzyme, from starch, a polysaccharide. Maltose is also important in beer, even though it is decomposed into ethanol by yeast.
Maltose is only only disaccharide that matches the description so the answer is B.