Calculate the number of ATOMS in 1.0 mole of O2.
Answers
Answer: The number of atoms in given amount of oxygen gas is
Explanation:
According to the mole concept:
1 mole of a substance contains number of atoms.
We are given:
Moles of oxygen gas = 1 mole
So, the number of atoms that will be present in 1 mole of oxygen gas will be number of atoms.
Hence, the number of atoms in given amount of oxygen gas is
Related Questions
Name the following Cr(SO4)2
Why is HBrO a weaker acid than HBrO3? A. The HO bond in HBrO is less polar than the HO bond in HBrO3 B. The HO bond in HBrO is more polar than the HO bond in HBrO3 C. The HBr bond in HBro is weaker than the HBr in HBrO3 D. The HBr bond in HBrO is stronger than the HBr bond in HBrO3 E. The HO bond in HBrO is weaker than the HO bond in HBrO3
If an element is located on the far right side of the periodic table, what would one of its physical properties probably be?a. easily drawn into thin wires b. poor conductor of electricity c. high density d. malleable
Gases, fluids, and other solids in contact with a moving object will produce ____ due to friction.
Answers
Answer:
i need help with that too.
Explanation:
Answers
Answer: option (3) 1003 g.
Explanation:
1) 0.086 g has two signficant figures, because the zeros to the left of the decimal period and to the right of the decimal period and before the first non zero digit do not count. Those zeros only tell the place value of the other digits. So, only 8 and 6 are significan figures: two.
2) 0.431g has three significant figures: the 0 before the decimal period do not count. Only 4, 3, and 1 are signficant figures: three.
3) 1003 g has four significant figures, because the zeros in between the other digits count. So, 1, 0, 0, and 3 are significant figures.
4) 3870 g has three significant figures, because the 0 after the other 3 digits is only to determine the place value of the first three digit. Only 3, 8, and 7 here are significant figures.
Final answer:
Among the provided options, the mass measurement '1003g' contains four significant figures. In significant figure rules, leading zeros are not counted while zeros between non-zero numbers and zeros that come after a non-zero number, in a whole number representation, are significant.
Explanation:
In the context of mass measurement in chemistry, significant figures are crucial as they represent the precision of a measurement. Among the provided options: 0.086g, 1003g, 0.431g, and 3870g, the mass measurement 1003g contains four significant figures.
To clarify, leading zeros (e.g., 0.086g) are not counted as significant figures. In whole numbers, however, trailing zeros are counted as significant figures if they directly follow a non-zero number (e.g., 1003g). Therefore, the mass measurement '1003g' actually has four significant figures: 1, 0, 0, and 3.
However, the trailing zeros in '3870g' are not considered significant as there's no decimal point specified.
Learn more about Significant Figures here:
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Given the two formulas representing the same compound:
Which statement describes these formulas?
(1) Formulas A and B are both empirical.
(2) Formulas A nd B are both molecular.
(3) Formula A is empirical and Formula B is molecular.
(4) Formula A is molecular and Formula B is empirical.
Answers
Correct option is (3).
Empirical formula:-Simplest whole number ratio of various atoms present in a compound.
Molecular formula:-The formula that gives the total number of atoms of each element in each molecule of a substance.
So, (formula B) is the molecular formula, and
(Formula A)is the empirical formula.
Hence, the correct option is (3).
To know more about:-
CnH2n
CnH2n-2
And CnN2n+2
High temperatures increase the activation energy of the reaction.
High temperatures make the gas molecules move more quickly.
The reaction becomes exothermic at high temperatures.
Answers
The Haber process is an exothermic reaction at room temperature. This means that the reaction actually favors the reverse reaction, especially when the temperature is increased. So why increase the reaction temperature?
The reason for this is that nitrogen is a very stable element. Therefore, more energy is needed to overcome the slow rate of reaction. So the reaction temperature must be low enough to favor a forward reaction, but high enough to speed up the reaction.
this is wrong do not put this if your with FLVS
the correct answer is C i got 100% on it
B
It changes direction when it passes through an opening
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It changes its speed and wavelength when it passes through an opening
D
It changes direction when it passes from one medium to another
E
It changes its speed and wavelength from one medium to another.
F
It changes direction when it bounces off of a solid surface.
Answers
If a sound wave refracts,It changes its speed and wavelength when it bounces off of a solid surface,It changes its speed and wavelength when it passes through an opening, and It changes direction when it passes from one medium to another. Therefore, option A, C and D are correct.
What is refraction of sound wave ?
An important case in which sound waves change form or spread out is called refraction. This phenomenon affects the bending of a sound wave owing to changes in the wave's speed.
Refraction is the reason ocean waves near a shore parallel to the beach and why glass lenses can be used to focus light waves.
If the air above the earth is warmed than that at the surface, sound will be change shape back downward toward the surface by refraction. Soundpropagates in all directions from a point source.
Thus, option A, C and D are correct.
To learn more about the refraction of sound wave, follow the link;
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