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).
Answer:
9.29 mol
Explanation:
Given data:
Number of moles = ?
Mass = 148.6 g
Solution:
Number of moles = mass/ molar mass
Molar mass of CH₄ = 16 g/mol
Now we will put the values in formula.
Number of moles = 148.6 g/ 16 g/mol
Number of moles = 9.29 mol
Thus 148.6 g have 9.29 moles.
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Explanation:
a. A divergent plate boundary process takes place
b. A convergent plate boundary process takes place
c. A transform plate boundary process takes place
Answer: 5.72 g mass of carbon dioxide was produced
Explanation:
Moles of C =
Mass of 
reacted = 59.1 g - 17.5 g = 41.6 g
Moles of 
According to reaction 1 mole produces 1 mole of 
then 1.3 mole of will produce 
moles of
Mass of :
=Moles of × molar mass of = 1.3 ×44 g/mol =
=57.2 grams
5.72 g mass of carbon dioxide was produced
