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melisa1 [442]
3 years ago
14

A student wants to determine what type of cereal his classmates like best he buys three of his favorite puffed rice cereals and

one oat cereal he pours five bowls of each cereal and gives one bowl to each of hissl 20 classmates he asked each of his classmates if they liked the cereal they had or not his data shows that more people liked puffed rice cereal that oat cereal he comes to the conclusion that puffed rice cereal is better than oat cereal what is wrong with the students conclusion
A. the students conclusion is not honest
B. the students conclusion shows cultural bias
C. the students conclusion shows skepticism
D. the students conclusion shows experimental bias
Chemistry
1 answer:
kogti [31]3 years ago
4 0
D. the student's conclusion shows experimental bias
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Unlike humans, termites are able to extract energy from wood because:
Sholpan [36]
Unlike humans, termites are able to extract energy from wood because: they have some microorganisms living in their gut that are able to break down cellulose.
3 0
3 years ago
Arrange the following elements in order of increasing first ionization energy.
Naddika [18.5K]

Answer:

The answer to your question is  Al, Mg, Si, S, P

Explanation:

First ionization energy is the energy necessary to remove an electron from an atom in a gaseous form.

Element           First ionization energy (kJ/mol)

Magnesium              737.7  

Aluminum                 577.5

Silicium                    786.5

Phosphorus              1011.8

Sulfur                        999.6

Order:   Al, Mg, Si, S, P

4 0
3 years ago
Consider the reaction:
murzikaleks [220]

<u>Answer:</u> The formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

<u>Explanation:</u>

To calculate the number of moles, we use the equation:

\text{Number of moles}=\frac{\text{Given mass}}{\text{Molar mass}}

Given mass of oxygen gas = 83 g

Molar mass of oxygen gas = 32 g/mol

Putting values in above equation, we get:

\text{Moles of oxygen gas}=\frac{83g}{32g/mol}=2.594mol

For the given chemical equation:

2Fe_2O_3\rightarrow 4Fe+3O_2;\Delta H^o_{rxn}=+824.2kJ

<u>Sign convention of heat:</u>

When heat is absorbed, the sign of heat is taken to be positive and when heat is released, the sign of heat is taken to be negative.

By Stoichiometry of the reaction:

When 3 moles of oxygen gas is formed, the amount of heat absorbed is 824.2 kJ

So, when 2.594 moles of oxygen gas is formed, the amount of heat absorbed will be = \frac{824.2kJ}{3mol}\times 2.59mol=713kJ

Hence, the formation of given amount of oxygen gas results in the absorption of 713 kJ of heat.

7 0
3 years ago
Someone pls help me I will mark you as brain
Reptile [31]
3rd one I think it is.
5 0
2 years ago
Use the normal boiling points: propane, C3H8, –42.1˚C; butane, C4H10, –0.5˚C; pentane, C5H12, 36.1˚C; hexane, C6H14, 68.7˚C; hep
svlad2 [7]

Answer:

The answer to your question is 126.1°C

Explanation:

                  Boiling point         Difference of boiling points  

C₃H₈             - 42.1°C

C₄H₁₀             -   0.5°C                 41.6 °C

C₅H₁₂               36.1°C                  36.6°C                       41.6 - 36.6 = 5°C          

C₆H₁₄               68.7°C                 32.6°C                        36.6 - 32.6 =4°C

C₇H₁₆               98.4°C                 29.7°C                        32.6 - 29.7 = 2.9°C

We can observe on the table that the difference of boiling points diminishes 1°C when the hydrocarbon has one more carbon, then the difference of temperature between the hydrocarbon of 8 carbons and the hydrocarbon of 7 carbons must be 2°C.

So, this difference is 29.7°C - 2°C = 27.7°C.

And the boiling point of octane is approximately 98.4 + 27.7°C = 126.1°C

7 0
3 years ago
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