When conducting an experiment, a scientist should: (a) attempt to test every possibility (b) attempt to control the conditions (c) place no limits on the investigation (c) proceed without specific goals

Answers

Answer 1

Answer:

Answer : Option B) Attempt to control the conditions.

Explanation : While conducting an experiment, a scientist should always attempt to control the reaction conditions.

If the reaction conditions are not controlled one can lose the expected result or observation that was supposed to be generated from the experiment. Like controlling the given temperature, pressure, addition of catalysts, etc. If these conditions are overlooked one may not achieve the expected results and will not reach to the conclusion.

Answer 2

Answer: B attempt to control the conditions

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True or False: Changes in states of matter indicate a chemical change.

Compared to a 0.1 M aqueous solution of NaCl, a 0.8 M aqueous solution of NaCl has a(1) higher boiling point and a higher freezing point
(2) higher boiling point and a lower freezing point
(3) lower boiling point and a higher freezing point
(4) lower boiling point and a lower freezing point

Answers

The correct answer is option 2. A 0.8 M aqueous solution of NaCl has a higher boiling point and a lower freezing point than a 0.1 M aqueous solution of NaCl. This is explained by the colligative properties of solutions. For the two properties mentioned, the equation for the calculation of the depression and the elevation is expressed as: ΔT = -Km and ΔT = Km, respectively. As we can see, concentration and the change in the property has a direct relationship.

Answer:

(2) higher boiling point and a lower freezing point

Explanation:

Coal is formed when

Answers

dead animals that's all you need to know oh and also dead plants

Which organic reaction produces rubber and plastics? A) polymerization B) esterification C) saponification D) fermentation

Answers

Answer: Option (A) is the correct answer.

Explanation:

When monomers in a chemical reaction combine together then it results in the formation of long chains. This process is known as polymerization.

For example, rubber and plastic are formed by polymerization.

Esterification is defined as a process in which esters are formed when an acid is heated with alcohol.

Saponification is defined as a process in which aqueous alkali is heated with a fat or oil resulting in the formation of a soap.

Fermentation is a process in which bacteria like microorganisms, yeast etc help in the breakdown of a substance into simpler substances.

Thus, we can conclude that polymerization is an organic reaction which produces rubber and plastics.

The answer would be, A) Polymerization.

Methane reacts with oxygen to produce carbon dioxide and water. What are the products? A.
methane and water

B.
oxygen and carbon dioxide

C.
methane and oxygen

D.
carbon dioxide and wate

Answers

Methane is a hydrocarbon, hydrocarbons burning in the presence of oxygen results in a combustion reaction that yields a large amount of energy

balanced equation for the combustion reaction for methane is as follows

CH₄ + 2O₂ --> CO₂ + 2H₂O

the products of the reaction as stated above are

CO₂ and H₂O

answer is

D.carbon dioxide and water

The products are carbon dioxide and water (D), since this is what we are left with at the end of the reaction.

what mass of sodium chloride is produced when chlorine gas reacts with 0.29 grams of sodium iodide? working on stoichiometry and need help!

Answers

CI2 + 2Nal ---> 2NalCI + I2
Nal = 149.9 g/mol.
NaCI = 58.5 g/mol
2 mol Nal makes 2 mol NaCI
0.29 g Nal x ( 1 mol / 149.9 g) = 0.0019 mol NaCI
00.19 mol NaCI x ( 58.5 g / 1 mol ) 0.11 g NaCI ( 2 sig figs)

Unrestricted populations of organisms experience _____.a. exponential growth
b. linear growth
c. fertility
d. biotic growth
User: As a population reaches its carrying capacity, there is an increase in competition for
a. food.
b. shelter.
c. mates.
d. All of the above

Answers

Answer:

1. A

2. D

Explanation:

1. If a population is left unrestricted, meaning it is not limited to anything, then the population will continue to increase exponentially due to there being no limits.

2. If a population is limited, and it has reached its carrying capacity, then the essential needs of life are being competed for. Things like food, shelter, and mates are now a limited resource, and hence the option would be "all of the above".

Unrestricted populations of organisms experience Exponential growth.

As a population reaches is carrying capacity there is an increase in competition for All of the above.
Hope I helped.

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