Answer:
He was an American industrialist and a founder of Standard Oil, first based in Ohio. He was also a key figure in the development of the Atlantic coast of Florida and founder of what became the Florida East Coast Railway.
Explanation:
Answer:
1) Test tube 3, the third one.
2)
Explanation:
The first(1) test tube is Cold H2O(Water/dihydrogen monoxide), and 0.5 miligrams of Sodium Carbonate(Na2CO3).
The second(2) test tube is Cold H2O(Water/dihydrogen monoxide), and 0.5 miligrams of Sodium Carbonate(Na2CO3) with Citric acid(C6H8O7).
The third(3) test tube is Hot H2O(Water/dihydrogen monoxide), and 0.5 miligrams of Sodium Carbonate(Na2CO3).
The fourth(4) test tube is Hot H2O(Water/dihydrogen monoxide), and 0.5 miligrams of Sodium Carbonate(Na2CO3) with Citric acid(C6H8O7).
To find which test tube produces gas bubbles, evaluate the type of reaction from the given reactants by determining it's product. Reactants →(yeilds) Products.
Increasing temperature causes the concentration of a reactant to increase, while causing the concentration of a product to increase. This scenario is the exact opposite for decreasing temperature. Endothermic(heat transfer in;endo) is an increase in temperature, while Exothermic(heat transfer out;exo) is a decrease in temperature. Colder substances move slower, and will react slower while warmer substances move faster, and react faster. Just as you warm up when you run faster. This is all based on thermodynamics(heat energy and kinetic(motion) energy resulting in movement in particles). Temperature is the measure of average kinetic energy in an object. Surface tension decreases as temperature rises, and increases as temperature falls. Therefore more boubles with an endothermic reaction because heat is transferred within the substance. And thus a greater reaction.
The correct answers are a , b , c ! :)
The most important duty of the president is to ensure that all laws are to be faithfully executed. It is impossible for a country to be secure without all proper laws in place. For the second question, the answer is 8 years. A president can service for 2 terms of 4 years as an acting president.