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4 years ago

12 points

Chemistry

1 answer:

sleet_krkn [62]4 years ago

7 0

Answer:

C. Theories have been confirmed through tests; hypotheses haven't.

Explanation:

In simple terms, a theory is something that has been studied, tested, and validated with results whereas a hypothesis is when one "guesses" or "assumes" about something with no prior tests. In short, a hypothesis can be best understood as just a proposal while theory can be taken as a validated result.

Through various trials and tests, a theory arrives whereas a hypothesis can be the initial stage of the testing. For example, in saying that "My hypothesis is that this metal cannot bend" is just assuming or expressing one's opinion. But when the metal is tested and a definite result is found, then that becomes a theory.

So, we can say that a theory is a confirmed result after tests while a hypothesis is not tested or confirmed with a definite result.

Thus, the correct answer is option C.

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4 years ago

If we react 5.4g of sodium chloride with an unknown amount of fluorine gas, we produce 4.9g of sodium fluoride and 3.7g chlorine

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Answer:

4.43 g

Explanation:

The reaction between sodium chloride and flourine gas is given as;

NaCl + F2 --> NaF + Cl2

From the stochiometry of the equation;

1 mol of NaCl reacts eith 1 mol of F2 to form 1 mol of NaF and Cl2

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This means 38g of flourine reacted with NaCl to form 42g of NaF

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3 years ago

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3 years ago

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Answer:

0.0611M of HNO3

Explanation:

The concentration of the NaOH solution must be 0.1198M

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1 mole of NaOH reacts per mole of HNO3.

That means the moles of NaOH used in the titration are equal to moles of HNO3.

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In 25.00mL = 0.025L -The volume of the aliquot-:

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3 years ago