Complete Question:
Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. What does this represent about the type of change happening in the container?
Group of answer choices
A. A chemical change started immediately and finished at eight minutes.
B. A non-chemical change started immediately and finished at eight minutes.
C. A chemical change occurred at four minutes.
D. A non-chemical change occurred at four minutes.
Answer:
A. A chemical change started immediately and finished at eight minutes.
Explanation:
A chemical reaction can be defined as the chemical process which typically involves the reaction between two or more chemical elements (substances) to form a new compound, through the rearrangement of the ionic or molecular structure of each chemical element.
This ultimately implies that, a chemical reaction is a chemical change that immediately starts when two or more molecules of a chemical element (substance) known as reactants are combined together to form a new product (compound).
In this scenario, Theresa creates an experiment where she mixes two red-colored substances together in a container and observes the solution slowly changing from red to blue for the next eight minutes. The solution becomes completely blue after eight minutes. Thus, what this represent about the type of change happening in the container is that, a chemical change (from red to blue) started immediately and finished at eight minutes.
Answer:
Explanation:
The<em> heat</em> to <em>vaporize</em> a l<em>iquid</em> is equal to the amount of liquid in moles multiplied by the specific <em>heat of vaporiztion</em> per mole.
First, calculate the number of moles in 35.5g of <em>butane</em>.
- Molar mass of butane: 58.124 g/mol
- Number of moles = mass in grams/molar mass
- Number of moles = 35.5g / 58.124g/mol = 0.6107632mol
Now, calculate the heat to vaporize that amount of <em>liquid butane</em>:
- Heat = number of moles × specific heat of vaporization
- Heat = 0.6107632mol × 21.3kJ/mol = 13.0 kJ
The answer must be reported with 3 significant figures.
Answer:
Explanation:
. The Haber Process involves nitrogen gas combining with hydrogen gas to produce ammonia If 10.0 grams of nitrogen gas combines with 10.0 gram of hydrogen gas, find the following the molar mass of reactants and products, the limiting reactant, the excess reactant, the amount of ammonia produced, the amount of excess chemical not used in the reaction Score Nitrogen gas + hydrogen gas -> ammonia gas Match the terms to the correct answers. (Hint: write your chemical equation and balance it first) Terms Answers Hydrogen gas Nitrogen gas 28.02 grams 2.02 grams 17.04 grams 12.16 gram 7.86 grams A. The amount of excess reagent not used in the reaction B. The amount of product produced C. The excess reagent D. The limiting reagent E. The molar mass of ammonia F. The molar mass of hydrogen G. The molar mass of nitrogen gas 1. 2 4 7.
Answer:
clouds and precipitation that minimize temperature changes.
Explanation:
