Answer:
Center of gravity
Explanation:
Gravity always acts downward on every object on earth . Gravity multiplied by the objects mass produces a force called weight. Although the force of an objects weight acts downwards on every partial of the object , it is usually considered to act as a single force through its balance point , or center of gravity.
Answer:
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<u>Answer</u><u>:</u>
Ammonium chloride and slacked lime
<u>Explanation</u><u>:</u>
We can generate ammonia gas in the research centre by slowly heating ammonium chloride (NH4Cl) and slaked lime [Ca(OH)2]. Ammonia gas is lighter than air, requiring its accumulation by the descending displacement of air.
Answer: 5.21, 4.69 & 10.1
Explanation:
Question 1 :
We have to determine the pOH of the solution first.
pOH = - Log [OH-]
= - Log ( 1.60 x 10∧-9)
= 9 - 0.204
= 8.79
Using the mathematical equation ;
pH + pOH = 14
∴ pH + 8.79 =14
Making pH subject of formular; pH = 14 - 8.79 = 5.21
Question 2:
pH = - Log [H3O+]
= - Log (2.00 x 10∧-5)
= 5 -0.301
= 4.69
Question 3:
Using the mathematical equation, pH + pOH = 14
3.90 +pOH = 14
∴ pOH = 14 -3.90
= 10.1
I think it is going to be 3