How do valence electrons affect reactivity?
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Related Questions
In Organic Chemistry, what does the letter "X" represent?a. a hydrogen c. a carbon b. a halogen d. an alkane
Which of the following elements has the strongest attraction for electrons? a. oxygen b. sulfur c. aluminum d. boron
Burning alcohol for fuel is a very efficient process. Please select the best answer from the choices provideda. True b. False
Which represents the copernican model that is the most similar to that of Aristarchus?
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and Dt is the change in temp.
You'll have to solve this twice, once with the Cp in calories, and once with the Cp in joules.
1380.72 Joules
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Power is not a vector quantity in the provided query. The correct answer is option c.
A vector quantity is a physical quantity with magnitude as well as direction. Displacement, velocity, acceleration, and force are the types of vector quantities.
In contrast, power is a scalar quantity, which means it has simply magnitude and no direction. Power is measured in watts (W) or joules per second (J/s) and is defined as the rate at which work is done or energy is moved.
Therefore, the physical quantity that is not a vector quantity is option c, power.
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The given question is incomplete. The complete question is:
Which of the following is not a vector quantity? Select one:
a. acceleration
b. displacement
c. power
d. velocity.
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Answer:
2.2 °C/m
Explanation:
It seems the question is incomplete. However, this problem has been found in a web search, with values as follow:
" A certain substance X melts at a temperature of -9.9 °C. But if a 350 g sample of X is prepared with 31.8 g of urea (CH₄N₂O) dissolved in it, the sample is found to have a melting point of -13.2°C instead. Calculate the molal freezing point depression constant of X. Round your answer to 2 significant digits. "
So we use the formula for freezing point depression:
- ΔTf = Kf * m
In this case, ΔTf = 13.2 - 9.9 = 3.3°C
m is the molality (moles solute/kg solvent)
- 350 g X ⇒ 350/1000 = 0.35 kg X
- 31.8 g Urea ÷ 60 g/mol = 0.53 mol Urea
Molality = 0.53 / 0.35 = 1.51 m
So now we have all the required data to solve for Kf:
- ΔTf = Kf * m
- 3.3 °C = Kf * 1.51 m
- Kf = 2.2 °C/m
b.gun powder
c. sugar water
d. steam
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Answer:- Law of definite proportions.
Explanations:- The chemical composition of a compound is always constant means it contains the same elements in exactly same proportions by mass. This is called "Law of definite proportions."
Molecular formula of water is . It has two hydrogen atoms and one oxygen atom. Atomic mass of H is 1.008 and that of oxygen atom is 15.999.
Molar mass of water = 2(1.008) + 15.999 = 18.015
mass percentage of H = = 11.2%
mass percentage of O = = 88.8%
These percentages are always fix, no matter from where the sample of water is collected.
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1.3 x 10^22 times 3 = 3.9 x 10^22 atoms
Final answer:
The total number of atoms in 1.3 x 10^22 molecules of N(O)2 is 3.9 x 10^22 atoms since each molecule of N(O)2 consists of three atoms.
Explanation:
To answer the question of how many atoms there are in 1.3 x 10^22 molecules of N(O)2, one must be aware of the molecular composition of N(O)2. This molecule contains one nitrogen atom and two oxygen atoms, thus comprising three atoms in total. Consequently, to determine the total number of atoms, multiply the number of molecules by the number of atoms per molecule. Hence, the answer is 1.3 x 10^22 molecules * 3 atoms/molecule = 3.9 x 10^22 atoms.
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