Answer:
The correct option is;
c. The scientist can make and record observations
Explanation:
Empirical evidence are evidences obtained by direct observation, sensual perception or direct measurement. It is the processed and useful data gathered and stored in a material form or documented to provide record of the measurement.
With the aid of empirical evidence, it is possible for researchers to find answers to question regarding topics that can vastly impact every day life.
With empirical evidence, it is possible to determine the effects of treatment in a study such as the invention of working car safety devices such as seat belts and airbags.
Which of the following is an example of using creativity while recording measurements during an experiment? (5 points) a Writing a hypothesis b Organizing data in tables c Validating results by repetition d Interpreting results based on data
Answer:A
Explanation:
Hot glass looks the same as cold glass.
Answer:
no becuase the cold glass will have water droplets, whil the hot one has steam
Explanation:
In titrating 0.20 M hydrochloric acid, HCl, with 0.20 M NaOH at 25°C, the solution at the equivalence point is
Answer:
c) 0.10M NaCl
Explanation:
Options are:
a) 0.20M NaCl
b) Very acidic
c) 0.10M NaCl
d) 0.10M HCl + 0.20M NaOH
e) Slightly acidic.
Based on the reaction:
NaOH + HCl → H₂O + NaCl
You can see than 1 mole of NaOH reacts per mole of HCl producing 1 mole of NaCl
Assuming 1L of 0.20M HCl reacts with 1L of NaOH, moles of both compounds are:
1L * 0.20mol/L = 0.20 moles reacts. That means moles of NaCl produced are 0.20moles in 2L. Molarity of NaCl is:
0.20mol / 2L = 0.10M NaCl
That means, right option is:
c) 0.10M NaClAt the equivalence point, 0.01 M NaCl is present.
The reaction between NaOH and HCl occurs as follows;
NaOH(aq) + HCl(aq) ------> NaCl(aq) + H2O(l)
Concentration of HCl = 0.20 M
Concentration of NaOH = 0.20 M
Let as assume that the volume of both solutions is 1 L each
Number of moles of HCl = 0.20 moles
Number of moles of NaOH = 0.20 moles
The reaction is 1:1 hence 0.20 moles of NaCl is formed. However, the volume of the solution is now 2L.
Concentration of NaCl = 0.20 moles/2L = 0.01 M
Missing parts;
In titrating 0.20 M hydrochloric acid, HCl, with 0.20 M NaOH at 25°C, the solution at the equivalence point is
Select one:
a. 0.20 M NaCl
b. very acidic
c. slightly acidic
d. 0.10 M HCl and 0.20 M NaOH
e. 0.10 M NaCl
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How to know what gases have more effusion?
Answer:
If you have ever been in a room when a piping hot pizza was delivered, you have been made aware of the fact that gaseous molecules can quickly spread throughout a room, as evidenced by the pleasant aroma that soon reaches your nose. Although gaseous molecules travel at tremendous speeds (hundreds of meters per second), they collide with other gaseous molecules and travel in many different directions before reaching the desired target.
Explanation:
hope this helps
which would be isotopes?
Answer:
e
Explanation:
Why is environmental science more than just ecology or biology?
Generally speaking, environmental science is a broader field that incorporates many elements of earth and life sciences, whereas ecology is usually more focused on how organisms interact with each other and their surroundings, and often on a very specific population of living things.
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. Un cuerpo irregular se introduce dentro de una probeta que inicialmente tiene un volumen de 20 ml como muestra la figura Después de la experiencia podemos afirmar que * El volumen del cuerpo es 3 ml. El volumen del cuerpo es cero. El volumen del cuerpo es igual al iniciar la experiencia. El volumen del cuerpo es 24 ml.
Answer:
El volumen del cuerpo es el mismo al comienzo de la experiencia.
Explicación:
El volumen del cuerpo es el mismo al principio porque el volumen no cambia si la temperatura permanece igual. Si cambiamos la temperatura i. mi. Al aumentar la temperatura, las moléculas comienzan a expandirse y se produce un aumento de volumen mientras que cuando disminuimos la temperatura, las moléculas de esa sustancia comienzan a contraerse y el volumen de esa sustancia disminuye. Entonces concluimos que el volumen depende de la temperatura.
54578 meters per second into miles per hour
Answer:
54578 mps - 122087.51 mph
Explanation:
BiP is found in high concentration in the lumen of the ER but is not present in significant concentrations elsewhere in the cell. How do you think this condition is established and maintained
Answer:
Initially, endoplasmic reticulum plays a key role in the production of protein, while BiP found in the endoplasmic reticulum contains Lysine , Aspartic acid , Glutamic acid and Leucine sequence. All these, cause BiP concentration to remain high in the ER (endoplasmic reticulum) hence retained. Making the lumen always concentrated on BiP.
Explanation:
BiP is known as binding protein, that binds two or more molecules together and is found in the endoplasmic reticulum at the lumen due to the absence of glucose.
The endoplasmic reticulum found in fungi cells, plant cells, animal cells, and protists cells, makes and processes proteins.
Lysine , Aspartic acid , Glutamic acid and Leucine sequence ensures the protein concentration is protected in the endoplasmic reticulum (ER).
If you want to cause an object to move, what should you do?
Answer:
For an object to move, there must be a force. A force is a push or pull that causes an object to move, change direction, change speed, or stop. Without a force, an object that is moving will continue to move and an object at rest will remain at rest.
Hoped I helped
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"What quantitative measurement and qualitative observations can be made about the interactions of matter and energy?" can someone break this down for me?
Quantitative measurements are numerical values, they involve amounts and units like measuring things. Qualitative observations appeal to the five senses, like what does the interaction look and sound like
Quantitative measurement about the interactions of matter and energy significantly deals with the representation of numerical values and data.
What is Matter?Matter may be defined as any sort of substance that is constructed of numerous types of particles that occupy physical space and possess inertia. In simple words, matter may be characterized as anything which occupies space and has mass.
The Qualitative observation of the interactions of matter and energy prominently deals with the concept based on perception. It basically involves all sorts of senses that one should occupy.
For example, how does the interaction between matter and energy looks like in appearances, heared through sounds, and feels through external factors.
Therefore, quantitative measurement and qualitative observations can significantly be made about the interactions of matter and energy.
To learn more about Matter and energy, refer to the link:
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true or false a measurement must include a unit
HI :)
True
Hope this helps :)
Question 2 of 5
What is the frequency of a wave that passes a given point 57 times in 3.0
seconds?
O A. 0.053 s
B. 19 Hz
C. 171 Hz
O D. 60 s
SUBMIT
Answer:
Frequency=?,number of oscillation=57,time=3.
There are two ways to go about this....
You can other use this formula: frequency=number of oscillation/time.
which is 57/3=19Hz.
OR.
You can use this formula:Period is time/number of oscillation.. which is..
3/57=0.053.
and frequency is 1/T....The "T" stands for period.
So since frequency is 1/T then it will be 1/0.053=18.8~19Hz..
The answer is option B.
Thank you for the question I hope it helps you
Indicate whether each of the following compounds dissolves in water to give ions, molecules, or both.
1. NaCl
2. HF
3. CH3CH2OH (ethanol)
4. HI
5. Weak electrolyte
6. Nonelectrolyte
7. Strong electrolyte
Answer:
The answer is in the explanation
Explanation:
An ion is defined as a particle that is positive or negative charged.
In water, strong electrolytes dissociates completely to produce ions. Weak electrolytes dissolves partially. One part in ions and the other still as the complete molecule. A nonelectrolyte doesn't dissociates in any way!
1. NaCl . STRONG ELECTROLYTE. Dissociates in ions
2. HF . WEAK ELECTROLYTE. Dissociates partially producing both molecules and ions
3. CH3CH2OH (ethanol) . NONELECTROLYTE. Doesn't dissociates producing just molecules.
4. HI . STRONG ELECTROLYTE. Dissociates completely in ions.
5. Weak electrolyte . Dissociates partially giving ions but also molecules
6. Nonelectrolyte . Only give molecules.
7. Strong electrolyte. Gives only ions.
Chemistry questions below! (●'◡'●)
(1) • Balanced Equation : 2HgO (s) ---> 2 Hg (l) + O₂ (g)
• Line a is represented by activation energy, or the smallest amount of energy needed for molecules to undergo a chemical reaction.
• Activated complex is the intermediate state during the conversion of reactants into products. In this case it is represented by Hg----O-----O----Hg. The dashed lines indicate that the bond between Hg and O are breaking and their length is increasing and the dashed line between oxygen atoms indicate that the bond is decreasing and bond formation is taking place.
• This reaction is endothermic as the energy of reactants is smaller than the energy of products.
(2) • Balanced Equation : CH₃Br + OH⁻ ---> CH₃OH + Br⁻
• The hydroxide ion reacts with the bromomethane, resulting in a double replacement reaction. The 'CH₃' in 'CH₃Br' joins with the hydroxide ion to form CH₃OH, while the Br breaks off as an ion.
• Take a look at the energy diagram below.
write this in standard form
Answer:
yes sir GLSBYWPOS
Explanation:
trump sniffs broken window
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The specific heat of aluminum is 0.900 J/gºC. How much energy is needed to raise the temperature of a 20.0 g block of aluminum from 22.8°C to 94.6°C?
✅Show work regardless if student got answer correct or incorrect
q = mC∆T
q = (30.0g)(0.900J/goC)(50oC)
q = 1350 J
So, the right answer is 1350 J
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Express 0.107 g to centigrams.
Answer:
10.7
Explanation:
1 gram is equal to 100 centigrams
so, multiply
5. Water is known to have a composition which is 88.8% oxygen by mass. If you had a
sample of water with a total mass of 367g how many grams of that would be from
hydrogen?
How to make baking powder
Answer:
To make baking powder, combine half a teaspoon of cream of tartar and a quarter teaspoon of bicarbonate of soda.
hope it helps;)
Answer:
with baking soda
Explanation:
A pure sample of a hydrocarbon is found to be 74.5% carbon by mass. What is the empirical formula of this compound?
Answer:
THE EMPIRICAL FORMULA FOR THE PURE HYDROCARBON IS CH4
Explanation:
A pure hydrocarbon contains carbon and hydrogen
Percentage composition of carbon = 74.5 %
Percentage composition of hydrogen = 25.5
In order to calculate the empirical formula of this hydrocarbon, you follow these couple of steps.
write out the percentage composition and divide by the relative atomic mass of the respective constituents.
Carbon = 74.5 / 12 = 6.2083
Hydrogen = 25.5 / 1 = 25.5
Next is to divide the values by the lowest factor
Carbon = 6.2083 / 6.2083 = 1
Hydrogen = 25.5 / 6.2083 = 4.1
Next is to write the empirical formula:
C H4
In conclusion the empirical formula for the pure hydrcarbon is CH4
Which tool gives scientists information about the wind speed and humidity of a region?
Answer:
A weather station
Explanation:
A weather station measures the wind speed and humidity of a specific area. GIS gives visual data that scientists can analyze, GPS gives the exact location of a weather phenomenon, and a hammer and lens allow scientists to study Earth’s geologic features.
The figure shows four forces exerted on a box.
Box
If F, equals 4 N and F3 equals 6 N and the box remains stationary, which statement is correct?
a
F2 equals 6 N and F4 equals 4 N.
b
F2 equals 2 N and F4 equals 10 N.
F2 equals 10 N and F4 equals 2 N.
Od
F2 equals 4 N and F4 equals 6 N.
Which describes any compound that has at least one element from group 17?
halide
noble gas
metalloid
transition metal
Answer:
A) Halide
Explanation: I promise, I made a 100 :)
Answer:
Halid!
Explanation:
i took the test
What happens to the muscle of dmd while working out
Galileo discovered four of Jupiter's moons. They are Io, Europa, Callisto, and _____, which is the largest moon in the solar system. A. Titan B. Triton C. Phobos D. Ganymede
Answer:
D. Ganymede
I hope this helps!
Describe all of the forces acting on the ice cream in the root beet float. Relate these forces to the fact that the ice cream is floating.
Answer:
he root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. ... The ice cream floats because the buoyant force is greater than the weight of the ice cream.
Explanation:
Answer:
he root beer exerts a force on all sides of the ice cream. These forces are all equal and cancel each other out. Gravity pushes downward on the ice cream. ... The ice cream floats because the buoyant force is greater than the weight of the ice cream.
Explanation:
100%
Nickel-63 has a half life of 92 hours. If a
1000 gram sample decayed for 368 hours,
how much Nickel-63 remains?
Answer:
6.25 g of nickel -63 will be left
Explanation:
Charlie is frying an egg in a pan located over a gas burner. He develops a model to determine the energy produced by the flame in the gas
burner by calculating the energy absorbed by the egg. Which assumption will Charlie need to make in order for his model to be considered a
closed system?
A. Heat flows from the egg to the surroundings.
O
B. Heat flows from the pan to the surroundings.
O
C. No heat is lost from the flame or the egg to the surroundings.
OD. The egg receives heat from the flame and the surroundings.
A closed system is one in which there is no exchange of materials or energy with the surroundings hence the correct assumption is that "No heat is lost from the flame or the egg to the surroundings."
Another name for a closed system is an isolated system. In such system, there is exchange of material or energy between the system and the surroundings.
In this case, the system comprises of the pan and the eggs. If the system is to be a closed system then " No heat is lost from the flame or the egg to the surroundings."
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Write 1 characteristic of Science
Answer:
Accuracy
Explanation:
For example a physician checking a person temperature who not say he is cold or hot but will give u an accurate answer after using a thermometer