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Which one of the following groups of chemical compounds is composed entirely of organic compounds? A. C2H2, CH4, CaCl2, CaCN2 B. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3 C. C2H4O, CH2O, CaSO4, C3H5(OH)3 D. Ch3OCH3, Ca3(PO4)2, CO2, H2CO3
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Asked 3/17/2017 8:19:16 AM
Updated 4/7/2020 9:59:35 PM
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User: Organic chemistry is the study of compounds containing A. carbon. B. nitrogen. C. oxygen. D. hydrogen.

User: Which one of the following groups of chemical compounds is composed entirely of organic compounds? A. C2H2, CH4, CaCl2, CaCN2 B. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3 C. C2H4O, CH2O, CaSO4, C3H5(OH)3 D. Ch3OCH3, Ca3(PO4)2, CO2, H2CO3

Weegy: The answer is D. C6H6, C2H5OH, C6H5CH3, C3H5(NO3)3
rhey22787|Points 1470|

User: With regard to the pH scale, a solution with a pH A. lower than 7 is considered basic. B. of 6 is considered neutral. C. higher than 7 is considered an acid. D. close to 14 is considered a strong base.

User: Which metal will displace nickel in a compound? A. Zinc B. Tin C. Arsenic D. Platinum

Weegy: Zinc will displace nickel in a compound.
Andrew.|Points 68191|

User: Which of the following is a method of purifying water? A. Aeration B. Fixation C. Adding iodine D. Freezing

User: All of the following are assumptions presented by Dalton's atomic theory except that A. all atoms of different elements are alike in size, shape, and weight. B. atoms combine with other atoms. C. atoms don't break into pieces even during chemical reactions. D. all matter consists of atoms.

Weegy: c. atoms are always in motion
Fanboy|Points 2821|

User: All of the following are assumptions presented by Dalton's atomic theory except that A. all atoms of different elements are alike in size, shape, and weight. B. atoms combine with other atoms. C. atoms don't break into pieces even during chemical reactions. D. all matter consists of atoms.

Weegy: c. atoms are always in motion
Fanboy|Points 2821|

User: One atom of silicon can properly be combined in a compound with A. one atom of chlorine. B. four atoms of calcium. C. three atoms of hydrogen. D. two atoms of oxygen.

Weegy: One atom of silicon can properly be combined in a compound with two atoms of oxygen.



User: Which one of the following chemical equations is balanced? A. NH3 + H2O 2NH4OH B. 2Na + S 2NaS C. KOH + H2SO4 KHSO4 + H2O D. 2NaCl + H2SO4 HCL + NaSO4

Weegy: B. KOH + H2SO4 ? KHSO4 + H2O is the answer.
OxTornado007|Points 6879|

User: Which of the following is accurate in describing the placement and classification of iodine? A. Iodine is located in Period 6, Group 7 and is classified as a metal. B. Iodine is located in Period 17, Group 5 and is classified as a nonmetal. C. Iodine is located in Period 5, Group 17 and is classified as a nonmetal. D. Iodine is located in Period 7, Group 6 and is classified as a metal.

Weegy: Iodine is located in Period 5, Group 17 and is classified as a nonmetal.
Janet17|Points 29599|

User: Regarding the formula Al2O3 which of the following is accurate? A. The chemical symbol Al indicates that oxygen is present in the substance. B. The subscript 2 indicates that two atoms of oxygen are present in the substance. C. The subscript 2 indicates that two atoms of aluminum are present in the substance. D. The coefficient 3 indicates that there are a total of three atoms of oxygen present in the substance.

Question
Asked 3/17/2017 8:19:16 AM
Updated 4/7/2020 9:59:35 PM
1 Answer/Comment
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Rating
8
The subscript 2 indicates that two atoms of aluminum are present in the substance. -is accurate regarding the formula Al2O3.
Added 4/7/2020 9:59:35 PM
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What's the efficiency of this particular machine? A. 84.21% B. 77.00% C. 103.90% D. 96.25%
Weegy: 2+2=4. If you are satisfied with my answer, please click 'Good' on the ratings. User: An 85 kg object is moving at a constant speed of 15 m/s in a circular path, which has a radius of 20 meters. What centripetal force is exerted on the body? A. 956.25 N B. 42.50 N C. 765.00 N D. 63.75 N (More)
Question
Updated 218 days ago|12/29/2020 8:41:43 PM
1 Answer/Comment
An 85 kg object is moving at a constant speed of 15 m/s in a circular path, which has a radius of 20 meters. 956.25 N is exerted on the body.

Solution:
centripetal force = mv² / R = 85kg × 15×15 / 20 = 956.25 N
Added 218 days ago|12/29/2020 8:41:43 PM
This answer has been confirmed as correct and helpful.
Which of the following is not a requirement of a practical fuel? A. It must contain a large amount of stored energy. B. It must be in the solid state to be used. C. It must occur in abundance in nature or be easy to produce. D. It must be made up of elements that combine easily with oxygen.
Question
Not Answered
Updated 341 days ago|8/29/2020 2:13:49 AM
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It must be in the solid state to be used is not a requirement of a practical fuel.
Added 341 days ago|8/29/2020 2:13:49 AM
This answer has been confirmed as correct and helpful.
Slides are placed upside down in a slide projector to correct for the _______ image produced. A. inverted B. virtual C. small size of the D. magnified
Weegy: Slides are placed upside down in a slide projector to correct for the inverted image produced. User: Which of the following will not be useful in trying to correct spherical aberration? A. Using proper grinding when an object is at a specific distance from the lens B. Using a circular stop to block out the outside rays of light C. Using a diaphragm to block outside rays of light D. Using a combination lens made up of lenses, each of which has a different index of refraction (More)
Question
Not Answered
Updated 6/2/2017 2:01:53 AM
1 Answer/Comment
Which of the following would experience induced magnetism most easily? A. Air B. Aluminum C. Copper D. Permalloy
Weegy: Permalloy would experience induced magnetism most easily. User: Which of the following is true about semi-conductors: A. A material is classified as a semiconductor if its resistance to the flow of electric current is too low to permit it to be called a conductor B. Gold and silver are important semiconductors C. Exposing a crystal of a semiconductor to heat or light starts displacing valence electrons which then move throughout the crystal D. Neither free electrons nor holes are considered charge carriers in a semi-conductor (More)
Question
Updated 6/28/2019 2:47:57 PM
1 Answer/Comment
A material is classified as a semiconductor if its resistance to the flow of electric current is too low to permit it to be called a conductor is true about semi-conductors.
Added 6/28/2019 2:47:57 PM
This answer has been confirmed as correct and helpful.
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