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Len [333]
4 years ago
7

Sam and Joe are trying to determine whether their ideas are scientific or pseudoscientific. Sam's idea is not rejected when expe

riments produce different results. Joe's idea gives the same result when tested repeatedly.
Chemistry
1 answer:
xenn [34]4 years ago
3 0

Answer:

See the complete question and the answer below

Explanation:

Sam and joe are trying to determine whether their ideas are scientific or pseudoscientific. sam's idea is not rejected when experiments produce different results. joe's idea gives the same result when tested repeatedly.  which statement is correct about sam and joe's idea?

<em>both ideas could be scientific. </em>

<em>neither idea could be scientific. </em>

<em>only sam's idea could be scientific. </em>

<em>only joe's idea could be scientific.</em>

<em />

The correct answer here would be that both ideas could scientific.

Scientific ideas are those that hold true or not rejected after being tested by different experiments. Pseudoscientific ideas cannot hold true after being tested by experiments.

If an idea is tested by repeated experiments and the experiments produce different results, the idea might remain unrejected if there are no overwhelming evidence to do so from the experiments. That an idea remains unrejected due to inadequate experimental evidence, however, does not mean it is scientific or unscientific.

In the same vein, that a repeatedly tested idea gives the same results does not mean that the idea is scientific unless the results say so. If results repeatedly go against the idea, it means such an idea is unscientific or pseudoscientific.

<em>Hence, both Joe and Sam's idea could be scientific, provided further experimental investigations are carried out.</em>

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What is the reducing agent in the following reaction
nika2105 [10]

Answer: Fe^{2+} is the reducing agent

Explanation:

Oxidation reaction : When there is an increase in oxidation state number.

Reduction reaction : when there is a decrease in oxidation state number.

5Fe^{2+}(aq)+MnO_4^-(aq)+8H^+(aq)\rightarrow 5Fe^{3+}(aq)+Mn^{2+}(aq)&#10;+4H_2O(l)

Fe has undergone oxidation, as its oxidation state is changing from+2 to +3.

Mn has undergone reduction, as its oxidation state is changing from +7 to +2.

The chemical agent which itself get oxidized and reduce others is called reducing agent.  Fe^{2+}  is a reducing agent.

The chemical agent which itself get reduced and oxidize others is called oxidizing agent. MnO_4^- is an oxidizing agent.

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Duncan knows that it takes 36400 cal of energy to heat a pint of water from room temperature to boiling. However, Duncan has pre
brilliants [131]

Answer:

\large \boxed{\text{122 000 J}}

Explanation:

1. Calculate the energy needed

\text{Energy} = \text{0.800 pt} \times \dfrac{\text{36 400 cal}}{\text{1 pt}}  = \text{ 29 120 cal}

2. Convert calories to joules

\text{Energy} = \text{29 120 cal} \times \dfrac{\text{4.184 J}}{\text{1 cal}} = \textbf{122 000 J}\\\\\text{The water will have absorbed $\large \boxed{\textbf{122 000 J}}$}

8 0
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Determine the number of moles of sodium contained in 3.148 x 1022 formula units of sodium sulfate using dimensional analysis.
Zolol [24]

Answer:

0.0522 mol NaSo4

Explanation:

3.148 x 10^22 Formula units NaSo4 * 1 mol NaSo4 / 6.02 x 10^23 Formula units NaSo4   = 0.0522 mol NaSo4

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Answer:

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