All categories

2 years ago

Which can lead scientists to change a theory that has already been accepted? Check all that apply.

Chemistry

2 answers:

8090 [49]2 years ago

5 0

It seems to me that every answer there is correct. All 5 answers could improve and change the results of a scientific experiment. I suppose I would say check off all 5 answers.

avanturin [10]2 years ago

3 0

Answer:

The correct answer will be options-

1. new hypothesis

2. technological inventions

3. repetition of the experiment

Explanation:

A scientific theory is a well-substantiated statement which explains any natural phenomenon in depth.

A theory is the elaborate explanation of the predicted hypothesis which becomes a theory when it has proved by the researcher and the fellow scientists.

The life of a theory is durable which can be changed or modified when a new hypothesis is generated on the same issue or scientific question which explains the phenomenon more accurately.

The advancement in the technology can add knowledge to the existed theory which could lead to the modification of the theory. Also, if the repetition of the results of the old experiment does not support the theory can lead to the change in the theory.

Thus, the selected options are the correct answer.

You might be interested in

At a certain temperature the vapor pressure of pure chloroform (CHCl3) is measured to be 91. torr. Suppose a solution is prepare

OleMash [197]

Answer:

$P_{CCl_4}=52.43torr$

Explanation:

Hello there!

In this case, sine the solution of this problem require the application of the Raoult's law, assuming heptane is a nonvolatile solute, so we can write:

$P_{CCl_4}=x_{CCl_4}P_{CCl_4}^{vap}$

Thus, we first calculate the mole fraction of chloroform, by using the given masses and molar masses as shown below:

$x_{CCl_4}=\frac{140/153.81}{140/153.81+67.1/100.21}=0.576$

Therefore, the partial pressure of chloroform turns out to be:

$P_{CCl_4}=0.576*91torr\\\\P_{CCl_4}=52.43torr$

Regards!

3 0

2 years ago

Problem 4

Hunter-Best [27]

<h3>Answer:</h3>

1.93 g

<h3>Explanation:</h3>

<u>We are given;</u>

The chemical equation;

2C₂H₆(g) + 7O₂(g) → 4CO₂(g) + 6H₂O(l) ΔH = -3120 kJ

We are required to calculate the mass of ethane that would produce 100 kJ of heat.

From the equation given;

2 moles of ethane burns to produce 3120 Kilo joules of heat

Therefore;

Number of moles that will produce 100 kJ will be;

= (2 × 100 kJ) ÷ 3120 kJ)

= 0.0641 moles

But, molar mass of ethane is 30.07 g/mol

Therefore;

Mass of ethane = 0.0641 moles × 30.07 g/mol

= 1.927 g

= 1.93 g

Thus, the mass of ethane that would produce 100 kJ of heat is 1.93 g

3 0

3 years ago

crash course video about periodic table - The Periodic Table: Crash Course Chemistry #4 - write a reflection about this video

Stolb23 [73]

Answer:

I liked the video, it gave us lots of information about___. __ means/ is about.

Explanation:

7 0

2 years ago

I need help with question 48

Stells [14]

Answer:

V H2SO4=30 ml=0.03 l

Cm=16M

CM=n/V

n=CM×V

n= 0.48 moles H2SO4

Cm=0.48/0.3

CM=1.6M

Answer B

6 0

2 years ago

Substances with strong intermolecular bonds vaporize

ikadub [295]

Slower should be the answer for this

4 0

3 years ago