Answer:
a. The student performed the splint test incorrectly. He should of observed a popping sound when the splint was placed in the test tube.
Explanation:
It is given that a student performed an experiment where he dropped a nickel metal in to HCl solution. He observed the reaction and performed a splint test in the test tube that is filled with a gas which is formed while Nickle is dropped into the solution of HCl.
But the experiment that the student performed was incorrect. He must have observed the popping sound when the splint was placed in the test tube.
When the splint was added to the gas splint flared up. The hydrogen gas pops out when exposed to the flame.
Thus the correct option is (a).
E=MC(delta)T
=20.0g x 9.00J/g x (94.4-22.8) C
= 12,924.0 J
Light is helpful because it allows us to see things around us.
I hope this helps :)
Answer : The molar heat of fusion for substance X is, 775.6 cal/mol
Explanation :
First we have to calculate the moles of substance X.
Given:
Molar mass of substance X = 58.45 g/mole
Mass of substance X = 326.0 g
Now put all the given values in the above expression, we get:
Now we have to calculate the molar heat of fusion for substance X.
where,
Q = heat releases = 4325.8 cal
= molar heat of fusion for substance X = ?
n = moles = 5.577 mol
Now put all the given values in the above expression, we get:
Thus, the molar heat of fusion for substance X is, 775.6 cal/mol
Answer:
No, they dont have enough and they'd need 1 more quart of milk
Explanation:
lets see, 2 pints in a quart, if they have 6 quarts so 12 pints, they'd need 1 more quart to make 14 milkshakes
for 20, 6 12 oz bottles is 72 oz, 1/2 a gallon is only 64 so the 6 bottles is 8 more oz of water, Hoshi boght more
