The correct answer is the second option. <span>Baking soda fizzing in vinegar is an example of a chemical change. This example is a chemical reaction which undergoes a chemical change since new substances are being formed the fizzing of the system represent that gas is being produced by the reaction.</span>
Answer: The volume of the gold is 
The mass of gold is 19.3 g
The density of gold is 
Explanation:
Density is defined as the mass contained per unit volume.
Given : Mass of gold = 19.3 grams
To calculate the volume of cube, we use the equation:
where,
V = volume of cube
a = edge of cube
Volume of gold = 
Putting values in above equation, we get:
Putting in the values we get:
Thus density of gold will be
Answer: Force disadvantage and distance advantage
Explanation: When mechanical advantage is less than one the force of the strength decreases because input force is greater than output force.
The distance increases ie the object is moving over a long distance.
Example when fishing with a long fishing rod the force applied to move the fish from the water is greater than the weight of the fish itself. The advantage of using the long fishing pole is that the distance over which the fish travels is greatly increased.
Hope this helps. It took me about half an hour before I could get this answer from my various searches. The idea might not be clear but this was what I was able to understand.
Answer - D electrons are lost from one atom and gained by another.
