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Nataly_w [17]
3 years ago
12

A sound wave has a wavelength of 0.7 miles and a frequency of 500 Hertz what is the speed

Chemistry
1 answer:
yaroslaw [1]3 years ago
4 0

speed equals wavelength times frequency so

.7 x 500 = 350

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A 90 lb person is prescribed a drug in the amount of 50mg/kg body per day to be delivered in 2 doses per day. Each tablet contai
geniusboy [140]

Answer:

4 tabletes/dose

Explanation:

mass person = (90 Lb)×(Kg/2.20462 Lb) = 40.823 Kg body

amount of medicine = 50 mg/Kg body.day

frecuency = 2 dose/day

⇒ amount of medicine/day =  (50 mg/kg body.day)×(40.823 Kg body) = 2041.168 mg/day

⇒ mg medicine/dose = (20141.168 mg/day)×(day/ 2 dose) = 1020.584 mg medicine/dose

∴ mg medicine/tablet = 250 mg medicine/tablet

⇒ # tabletes/dose = (1020.584 mg medicine/dose)×(tablet/250 mg medicine) = 4.082 tabletes/dose

⇒ # tabletes/dose ≅ 4 tabletes/dose

7 0
2 years ago
Consider the reactivity of phenol, bromobenzene, toluene, and nitrobenzene toward electrophilic aromatic substitution.
AlexFokin [52]

Answer:

The most reactive compound is:<u> Phenol </u>  because the<u> electron donating</u> character of the <u>alcohol group</u> increases the rate of the reaction.

The least reactive compound is <u>nitrobenzene</u>

because the <u>electron withdrawing</u> character of the<u> nitro group</u> decreases the rate of the reaction.

Explanation:

  • PHENOL-: Any of a group of organic compounds with a hydroxyl (OH) group bound to a carbon atom in an aromatic ring is known as phenol. The word phenol is also the basic name for its simplest member, monohydroxybenzene (C6H5OH), also known as benzenol or carbolic acid, in addition to being the common name for the entire family.
  • ELECTRON DONATING CHARACTER-: Via the carbon atom it is bound to, an electron donating group (EDG) has the net effect of increasing electron density in a molecule. EDGs alter a molecule's reactivity by increasing electron density on neighboring carbon atoms: EDGs make nucleophiles stronger.
  • ALCOHOL GROUP-:Each of a class of organic compounds that have one or more hydroxyl (OH) groups bound to an alkyl group's carbon atom (hydrocarbon chain)is called Alcohol. Alcohols are organic compounds of water (H_2O) in which one of the hydrogen atoms has been substituted by an alkyl group, which in organic structures is usually expressed by R.
  • NITROBENZENE-:The organic compound nitrobenzene has the chemical formula (C_6H_5NO_2). It's a pale yellow oil that's insoluble in water and smells like almonds. Greenish-yellow crystals form when it freezes. It is made on a wide scale as a precursor to aniline from benzene. It is sometimes used as a solvent in the laboratory, especially for electrophilic reagents.
  • ELECTRON WITHDRAWING GROUP-: An electron withdrawing group (EWG) is a type of group that reduces electron density in a molecule by bonding to a carbon atom. EWGs alter a molecule's reactivity by reducing electron density on neighboring carbon atoms.
  • NITRO GROUP-: The nitro group is one of the most widely used explosophores (functional groups that combine to form a compound explosive). In addition, the nitro group is a heavy electron-withdrawing group. CH bonds alpha (adjacent) to the nitro group may be acidic due to this property.
7 0
3 years ago
Referring to an activity series, which of the following combinations of reactants would not produce a successful single-replacem
loris [4]
 I believe the answer is Ca + MgSO4
8 0
3 years ago
Read 2 more answers
How would a solution that is labeled 5.0 M would be read as?
Ivanshal [37]
5 moles because molarity signifies number of moles dissolved in One litre of water
8 0
3 years ago
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Explain whether or not you expect the chaparral biome to be sensitive to the loss of a single species.
aleksley [76]

Answer:

See the answer below

Explanation:

The chaparral biome is a temperate biome with a characteristic high temperature and dryness during summer and mild rainy winters and springs. The biome can be found in relatively small amounts in the major continents of the world with its rich plant and animal diversity who have successfully adapted to the conditions of the biome.

Due to the high biodiversity of the chaparral biome, <u>one would expect it to be resilient to the loss of a single species.</u> <em>The more the biodiversity of a biome or community, the more resilient such biome or community would be to the loss of species and lower the biodiversity, the more sensitive the community would be to the loss of species. </em>

3 0
3 years ago
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