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WINSTONCH [101]
3 years ago
12

Read the following story and then answer the questions.

Chemistry
2 answers:
Mice21 [21]3 years ago
6 0

Answer:

sentence 6

Explanation:

A hypothesis is a supposition or proposed explanation that is made by observing such evidence. The hypothesis is the start point of further investigation. The scientific method is demonstrated by the sentences:

Sentence 1 represents the problem, or the research question: why sea water freezes at a lower temperature than fresh water?;

Sentences 2 and 3 represent the initial research;

Sentences 4 and 5 represent the observation;

Sentence 6 is the hypothesis;

Sentences 7, 8 and 9 are the experimental phase, and

Sentence 10 is the theory: hypothesis was tested and proved in the experiment.

Sliva [168]3 years ago
4 0
Place both breaking in a freezer at a temperature
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quester [9]

Answer:

100 teragrams of nitrogen per year

Explanation:

Nitrogen fixation in Earth's ecosystems is defined as a process where by nitrogen in air is transformed into ammonia or other related nitrogenous compounds. Generally, atmospheric nitrogen is referred to as molecular dinitrogen and it is a nonreactive compound that is metabolically useless to all but a few microorganisms. This process is vital to life due to the fact that inorganic nitrogen compounds are needed for the biosynthesis of amino acids, protein, and all other nitrogen-containing organic compounds. Thus, the natural rate of nitrogen fixation in Earth's ecosystems is 100 tetragrams of nitrogen per year.

7 0
3 years ago
Give the number of significant figures indicated 78
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2 significant figures

6 0
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Muscles, bones, skin, and
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Answer:

The answer is Protein.

8 0
3 years ago
A 10.50 gram sample of a compound is decomposed to yield 3.40 g Na, 2.37 g S, and 4.73 g O. What is the mass percentage of each
9966 [12]

Answer:

Na = 32.4% , % S = 22.6% and %O = 45.0%

Explanation:

% Na = 3.4/10.5. × 100%

= 32.4%

%S = 2.37/10.5 × 100%

= 22.6%

% O= 4.73/10.5 × 100%

= 45.0%xplanation:

6 0
3 years ago
If you combine 27.1 g of a solute that has a molar mass of 27.1 g/mol with 100.0 g of a solvent, what is the molality of the res
baherus [9]

<u>Answer:</u> The molality of the solution is 0.1 m.

<u>Explanation:</u>

To calculate the molality of solution, we use the equation:

Molality=\frac{m_{solute}\times 1000}{M_{solute}\times W_{solvent}\text{ in grams}}

Where,

m_{solute} = Given mass of solute = 27.1 g

M_{solute} = Molar mass of solute = 27.1 g/mol

W_{solvent} = Mass of solvent = 100 g

Putting values in above equation, we get:

\text{Molality of solution}=\frac{27.1\times 1000}{27.1\times 100}\\\\\text{Molality of solution}=0.1m

Hence, the molality of the solution is 0.1 m.

8 0
3 years ago
Read 2 more answers
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