I think it’s number 5 and number 9 hopes this helps.
Answer: Decreasing the temperature inside the container will decrease the pressure of a gas inside a closed cubical container.
Explanation:
According to Gay-Lussac's Law : 'The pressure of the gas increases with increase in temperature of the gas when volume of the gas is kept constant'.

At constant volume, pressure of the gas will decrease on decreasing the temperature or vice versa.
Decreasing the temperature inside the container will decrease the pressure of a gas inside a closed cubical container.
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He can conclude that his experiment has very low precision.
<h3>What is Precision ?</h3>
Precision is defined as the degree of refinement with which an operation is performed or a measurement .
Precision is how close the exact answers are together.
As, the answers are increasing in time.
None of the answers are similar to one another.
Hence, He can conclude that his experiment has very low precision.
Learn more about Precision here ;
brainly.com/question/27845433
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Atomic <span>mass gold = 196.96 u.m.a
196.96 g ------------------ 6.02x10</span>²³ atoms
112 g ---------------------- ( atoms)
atoms = 112 x ( 6.02x10²³) / 196.96
atoms = 6.74x10²⁵ / 196.96
= 3.42x10²³ atoms
hope this helps!