Trigonal planar is the three-dimensional shape of the molecule with this Lewis structure. Hence, option C is correct.
Lewis dot structures also called electron dot structures are diagrams that describe the chemical bonding between atoms in a molecule.
According to the Lewis structure of formic acid, the carbon atom is a central atom and it has three bond pairs without any lone pair of electrons. In VSEPR theory, the double bond is treated as one bond pair for the prediction of the shape of the molecule.
Hence, formic acid will have a trigonal planar geometry around the carbon atom and tetrahedral geometry around oxygen atom as it has two lone pair and two bond pairs
Hence, option B is correct.
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trigonal planar which is answer choice c
2. A wave is moving toward shore with a velocity of 5.0 m/s. If its frequency is 2.5 hertz, what is the wavelength?
- Answer:
3. A jump rope is shaken producing a wave with a wavelength of 0.5 m. with the crest of the wave passing a certain point 7 times per second. What is the velocity of the wave?
- Answer:
4. The lowest pitch that the average human can hear has a frequency of 20.0 Hz. If sound with this frequency travels through air with a speed of 331 m/s, what is its wavelength?
- Answer:
5. A microwave has a frequency of 4,255 Hz. and a wavelength of 0.05 m. What is the microwave’s velocity?
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6. A sound wave travels with a velocity of 460 m/s and has a frequency of 820 Hz. What is its wavelength?
- Answer:
7. A wave at sea travels with a velocity of 32 m/s. If it has a wavelength of 8 m. what is its frequency?
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8. What is the frequency of a wave that has a velocity of 21.3 m/s and a wavelength of 7.8 m?
- Answer:
Based on the calculation, the velocity of this wave is equal to 420 m/s.
Given the following data:
Mathematically, the velocity of a wave is calculated by using this formula:
V = λF
Where:
Substituting the given parameters into the formula, we have;
V = 1.5 × 280
V = 420 m/s.
Note: You should use the above formula to solve the other questions.
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(2) 2 days (4) 4 days
Unstable heavy atoms will undergo radioactive decay to produce stable species. The half life time of the isotope which undergone a decay of 75 mg in 32 days is 18 days.
The half life time of a radioactive sample is the time taken to reduce it to half of the initial amount by decay.
The heavy unstable material have very short half life and they will easily undergoes radioactive decay by emitting certain radiation.
Radioactive decay is a firs order reaction and have the equation to find the radioactive constant as follows:
Where, t is the time of decay and Ni and Nt be the initial and final amount respectively.
It is given that 5 mg is remaining out of 80 mg after 32 days. Thus the radioactive constant is calculated as follows:
Now the half life time of the decay is calculated as below:
t(1/2) = 0.693 /decay constant
= 0.693/0.0376
= 18 days
Therefore, the half life time of the isotope which undergone a decay of 75 mg in 32 days is 18 days.
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Answer
solids conduct heat more efficiently ! basically their particles are more tightly packed and stay in that position, so the heat transfer by collision allows for the best conduction
Explanation:
hope this helps ! :)