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anygoal [31]
3 years ago
7

Which statement is a testable hypothesis?

Chemistry
2 answers:
Ganezh [65]3 years ago
8 0

Answer:

[C] If people brush their teeth twice a day, then they will get fewer cavities.

Explanation:

C is the only correct option because the hypothesis is not an opinion (unlike the rest of the options), and the hypothesis is able to be tested, and accurate data is able to be collected.

Marta_Voda [28]3 years ago
3 0
It is C that is the most testable hypotheses
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The chemical equation below shows the decomposition of nitrogen triiodide (NI3) into nitrogen (N2) and iodine (I2). 2NI3 Right a
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The moles of I₂ will form from the decomposition of 3.58g of NI₃ is 0.0136 moles.

<h3>How we calculate moles?</h3>

Moles of any substance will be calculated as:

n = W/M, where

W = required mass

M = molar mass

Given chemical reaction is:

2NI₃ → N₂ + 3I₂

Moles of 3.58g of NI₃ will be calculated as:

n = 3.58g / 394. 71 g/mol = 0.009 moles

From the stoichiometry of the solution, it is clear that:

2 moles of NI₃ = produce 3 moles of I₂

0.009 moles of NI₃ = produce 3/2×0.009=0.0136 moles of I₂

Hence, option (3) is correct i.e. 0.0136 moles.

To know more about moles, visit the below link:

brainly.com/question/15303663

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