Mr. Hall was conducting an experiment. He dissolved an unknownubstance in water. He performed multiple trials while varying the
emperature. What is the independent variable in his experiment?
a. The unknown substance, because it's the only thing he changed
b.The temperature, because it's the only thing he changed
Answers
Answer:
a
Explanation:
Related Questions
Excess protons in the blood decrease the amount of HCO − 3 and thus reduce the buffering capacity of blood. A rapid drop in pH could lead to death. Normal values for blood are pH = 7.4 , [ HCO − 3 ] = 24.0 mM , [ CO 2 ] = 1.2 mM . (a) If a patient has a blood pH = 7.03 and [CO2] = 1.2 mM, what is the [HCO3−] in the patient’s blood? The pKa of HCO3−= 6.1.(b) Suggest a possible treatment for metabolic acidosis.(c) Why might the suggestion for part (b) be of benefit to middle-distance runners?
Study the image. Which image best describes what the arrows represent?
At 25.0 ⁰C the henry's law constant for hydrogen sulfide(H2S) gas in water is 0.087 M/atm. Caculate the mass in grams of H2S gas that can be dissolved in 400.0 ml of water at 25.00 C and a H2S partial pressure of 2.42atm.
Are the bonds that chlorine forms with sodium (to form NaCl) and with carbon (to form CCl4) the same in both compounds?
Answers
I might be wrong, I’m just kinda going off based a little research and it says that it only happens in reptiles and teleost fish. The only option on there that’s related to it is the leatherback turtle.
with different properties are formed?
Answers
The chemical reaction indicate the formation of new substance by change in nature of original compound and shows chemical changes in the reaction.
What is chemical reaction?
Chemical reaction is defined as process in which two or more molecules collide with the proper orientation and enough force to produce a new product.
It is also defined as a procedure in which one or more compounds, known as reactants, are changed into one or more distinct substances, known as products.
There are mainly seven types of reaction.
- Synthesis reaction
- Decomposition reaction
- Displacement reaction
- Double displacement reaction
- Combustion reaction
- Redox reaction
- Acid-Base reaction
Thus, the chemical reaction indicate the formation of new substance by change in nature of original compound and shows chemical changes in the reaction.
To learn more about chemical reaction, refer to the link below:
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Answer:
Changes in Properties Changes in properties result when new substances form. For instance, gas production, formation of a precipitate, and a color change are all possible evidence that a chemical reaction has taken place. ... Change in Color A color change can signal that a new substance has formed.
Explanation:
Answers
Answer: 500K and 0.10atm
Explanation:
An important concept to remember is that gases behave most ideally under low pressure and high temperature. 500 K is a high temperature and 0.10 atm is a low pressure, which makes that the best answer.
Final answer:
The conditions under which H2 gas would behave most like an ideal gas are at a high temperature of 500 K and a low pressure of 0.10 atm. These are optimally suitable for a gas to behave ideally as per the ideal gas law.
Explanation:
Under the conditions of both temperature and pressure given in the question, H2 gas would behave most like an ideal gas at 500 K and 0.10 atm. The ideal gas law, which describes the relationship between the pressure, volume, and temperature of a gas, suggests that a gas behaves most ideally at low pressure and high temperature.
This is because at low pressures, the volume of individual gas molecules relative to the total volume of gas becomes negligible, and intermolecular forces become weak. Meanwhile, at high temperatures, the kinetic energy of the gas molecules becomes high enough to overpower any intermolecular forces of attraction. Hence, the gas behaves more ideally.
A good way to visualize this is to think of an ideal gas as perfectly 'free' – the particles move in straight lines until they hit the edge of their container, and they do not attract or repel each other. The closer we get to this scenario, the more 'ideal' the gas would behave.
Learn more about Ideal gas law here:
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Answers
Answer : The volume required to fill the gas tank is, 45.42 liters
Explanation :
Conversion used for gallon to liters are:
As we are given the volume of gas tank in gallon is, 12.0 gal
Now we have to determine the volume of gas tank in liters.
As, 1 gallon = 3.785 liter
So, 12.0 gallon =
Therefore, the volume required to fill the gas tank is, 45.42 liters
Answers
Answer:
See Explanation
Explanation:
Pb2O3 is better formulated as PbO.PbO2. It is actually a mixture of the two oxides of lead, lead II oxide and lead IV oxide.
This implies that this compound Pb2O3 (sometimes called lead sesquioxide) is a mixture of the oxides of lead in its two known oxidation states +II and +IV.
Hence Pb2O3 contains PbO and PbO2 units.
b. exothermic reaction
c. spontaneous reaction.
d. nonspontaneous reaction.
Answers
Answer:
a. endothermic reaction
Explanation:
In an endothermic reaction, heat is absorbed from the environment. This leaves the surrounding at a colder temperature compared to the system.
ΔH, the change in enthalpy is assigned a positive sign because the heat energy level of the final state is higher than that of the initial state.
Some examples are mostly dissolution substances in water.