Scientific method involves the systematic step by step method of answering a question. The six major steps involved in a scientific method are purpose, research, hypothesis, experiment, analysis, and conclusion.
Purpose of a scientific method is the question being asked or the problem to be solved.
Research is the collection of background information relevant to the purpose of the experiment.
Hypothesis is the answer predicted to the question under study, as per the background research.
Experiment is the testing of the hypothesis. Experiment has independent and dependent variables, independent variable is changed by the experimenter and its effect is studied on the dependent variable.
Analysis involves the data interpretation in order to prove the hypothesis.
Conclusion is the review of data set to prove the hypothesis to be correct or incorrect.
Answer: -
1. Observation
Any incident that makes the scientific mind curious is an observation for the scientific mind.
2. Question
The scientific mind then refines the general observation into a proper line of curiosity to ponder the reason behind it.
3. Hypothesis
A hypothesis is an informed guess as to the possible answer of the question developed by the scientific mind. Hypothesis may not be correct but should provide a direction for further investigation.
4. Experiment
To test the hypothesis, the scientific mind designs an experiment. The experiment must be controlled and reproducible.
5. Analysis
Using several trials of the experiment, the results are noted down. The data is then correlated with the hypothesis.
6. Conclusion
After analysis of the data, a conclusion is drawn on whether the hypothesis is correct or incorrect. If the hypothesis is incorrect, then a new hypothesis must be made.
If it is correct, then our original question is answered.
Answer:
Which equation represents the reaction of a weak acid with water? the equation is : HCl + H2O H3O+ + Cl- HCO3– + H2O H2CO3 + OH– H2O H + + OH- HCOOH + H2O H3O+ + HCOO
Explanation:
hope it helps : )
Answer:
Hey mate, here is your answer. Hope it helps you.
HCOOH + H2O ↔ H3O+ + HCOO-
Explanation:-
A strong acid is one which completely dissociates into its corresponding ions in aqueous medium.
In contrast, a weak will only partially dissociate such that there is an equilibrium between the dissociated ions and the undissociated acid.
In the given examples:
HCl, HCO3- and H2CO3 are all strong acids. However, HCOOH i.e. formic acid is a weak acid which dissociates in water to form H3O+ and formate ion, HCOO-
HCOOH + H2O ↔ H3O+ + HCOO-
b. Positive
c. Neither Negative nor positive
Answer:
1. Mass of Carbon is 56.89g
2. Mass of Hydrogen is 6.33g
3. Mass of Oxygen is 75.88
Explanation:
The following were obtained from the question.
Mass of the compound = 139.1g
Mass of CO2 produced = 208.6g
Mass of H2O produced = 56.93
1. Determination of mass of Carbon (C). This is illustrated below:
Molar Mass of CO2 = 12 + (2x16) = 44g/mol
Mass of C = 12/44 x 208.6
Mass of C = 56.89g
2. Determination of the mass of Hydrogen (H). This is illustrated below:
Molar Mass of H2O = (2x1) + 16 = 18g/mol
Mass of H = 2/18 x 56.93
Mass of H = 6.33g
3. Determination of the mass of oxygen (O).
This is illustrated below:
Mass of the compound = 139.1g
Mass of C = 56.89g
Mass of H = 6.33g
Mass of O = Mass of compound - (mass of C + Mass of H)
Mass of O = 139.1 - (56.89 + 6.33)
Mass of O = 139.1 - 63.22
Mass of O = 75.88
the length of ribbon needed to tie around a vase
B.
the size of a student's waist
C.
the distance from the ground to the top of a ramp
D.
the circumference of an orange
Answer:
C
the distance from the ground to the top of a ramp
B. -1,+1,0
C. -2,+3,-1
D. 0,0,0
Three resonance structures contribute to the structure of dinitrogen monoxide.
The resonance structure is invoked when a single structure can not sufficiently explain all the bonding properties of a compound. All the various contributing structures contribute to the final structure of the compound but not all to the same degree.
There are three resonance structures of dinitrogen monoxide. The most stable structure is always the structure that has the formal charges as -1, +1 and zero as shown.
Learn more: brainly.com/question/14283892
Answer:
A. 0, +1, -1
Explanation:
You can draw the lewis structure for NNO 3 ways: With two double bonds N=N=O, with a triple bond between the N and O and single bond between the two N's, or a triple bond between the two N's and a single bond between the N and O.
The goal is to have formal charges that are as small as possible, to have no identical formal charges on adjacent atoms, and to have the most negative formal charge on the most electronegative atom. The most stable structure is the one with the triple bond between the two N's because it gives the formal charges 0, 1, and -1 respectively. Unlike the other two structures, the negative formal charge is correctly placed on O, the most electronegative atom.
How many moles of iron (Fe) would be produced if 2.50 mol Fe2O3 react? Make sure to use the correct number of significant figures in your answer.
2.50 mol Fe2O3 =
Answer:
5 moles of iron formed
Explanation:
Given data:
Moles of iron formed = ?
Moles of iron oxide react = 2.50 mol
Solution:
Chemical equation:
Fe₂O₃ + 2Al → Al₂O₃ + 2Fe
Now we will compare the moles of iron with iron oxide.
Fe₂O₃ : Fe
1 ; 2
2.50 : 2×2.50 = 5 mol