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Angelina_Jolie [31]
3 years ago
5

Plz help, if you don't know the answer please don't answer it

Chemistry
1 answer:
Semenov [28]3 years ago
6 0

Answer:

1. 71 and 29

2. 97 and 3

3. 2.1 and 1.2

Explanation:

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In an experiment temperature and the amount of NaCI dissolved in water were studied researchers changed the temperature of the w
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Answer:

Dependent variable: Amount of NaCI dissolved in water

Explanation:

In an experiment, the DEPENDENT VARIABLE is the variable that the experimenter measures. It is the variable whose response is dependent on the independent variable.

In this experiment, researchers were studying the temperature and the amount of NaCI dissolved in water i.e. how a change in temperature affected the amount of NaCl dissolved. They conducted two tests one changing the temperature (experimental group) and another without changing the temperature (control group) the temperature change. It is clear that the RESPONDING/DEPENDENT VARIABLE IN THIS EXPERIMENT IS THE AMOUNT OF NACL DISSOLVED.

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3 years ago
Which of the following describes the cause of acid rain?
taurus [48]

Acid rain is caused by a chemical reaction that begins when compounds like sulfur dioxide and nitrogen oxides are released into the air. These substances can rise very high into the atmosphere, where they mix and react with water, oxygen, and other chemicals to form more acidic pollutants, known as acid rain.

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4 years ago
Chapter 15 of your textbook discusses conjugation and various reactions of 1,3-dienes. In CHE 321, we discussed various ways to
xxMikexx [17]

Answer:

Dienes are alkenes that contain two carbon-carbon double bonds, so they have the same properties as these hydrocarbons.

In the attached file are the two reactions of dienes production.

Explanation:

Two ways to obtain dienes are as follows:

-Reaction of oxidative dehydrogenation of an alkane, is an exothermic process and occurs at lower temperatures, diene and water are formed, generating greater conversion at lower temperature levels.

-Dehydration of primary alcohols. The treatment of alcohols with acid at elevated temperatures produces dienes due to water loss. For example, heating ethanol in the presence of sulfuric acid produces ethene by the loss of a water molecule.

Download pdf
5 0
3 years ago
What type of energy does water gain as it sits in the sun?
Studentka2010 [4]

Answer:

heat energy

Explanation:

water in the sun begins to get hot

8 0
4 years ago
Read 2 more answers
Feeding levels within an ecosystem are
alisha [4.7K]

Answer:

C. trophic levels

Explanation:

Trophic levels are the feeding positions of all organisms in a specific ecosystem. There are five main trophic levels, or feeding levels.

-----------

Habitats are the environment in which organisms live. They are not feeding levels.

Taxonomic levels are a way of classifying species. They consist of (in order) domain, kingdom, phylum, class, order, family, genus, and species. They are not feeding levels.

Cladograms are branching diagrams that show the relationship between multiplt organisms/species. It too is not a feeding level.

Thus, is answer is C.

hope this helps!

3 0
2 years ago
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