Answer:
653.45
Explanation:
pi * 4 by the power of 2 * 13 ~653.45
Answer:
a) Mass = 3.9 g
b) Mass = 0.395 g
Explanation:
Density is related to the mass and volume of a substance by the relation:

a) Given:
Volume = 4.00cm3
Density = 0.97 g/cm3
Based on equation (1)

b) Given:
Volume = 125 ml
Density = 3.16 g/L
1 ml = 0.001 L
Therefore, 125 ml = 0.125 L
Based on equation (1)

Explanation:
A and D. the answer is a and d
For the first question, i think the correct answer is the third option. When a gas is formed, it is <span>the most conclusive in determining whether a chemical reaction has taken place given that none of your reactants is a gas.
For the second question, the statement is true.
For the third question, the correct answer is the last option.</span>
Answer: it's c. Axial precession
Explanation: