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JulijaS [17]
3 years ago
10

If a compound is separated into separate parts does the substance remain the same substance

Chemistry
1 answer:
MariettaO [177]3 years ago
6 0
No, if H2O is separated into H2 and O, then it is not the same substance

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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
3 years ago
The specific heat capacity of copper is 0.09 cal/g°C. How much energy is needed to flow into a 10-gram sample to change its temp
Anestetic [448]
ΔT = 21º C - 20 ºC => 1 º C

Q = m x C x ΔT

Q = 10 x 0.09 x 1

Q = 0.9 Cal

hope this helps!

7 0
3 years ago
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According to this entry from the periodic table, a neutral nitrogen atom usually has
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7 protons, 7 neutrons, and 7 electrons
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Which of these is a benefit of nuclear fusion?
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B. There is a lower risk of runaway chain reactions.

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Molecular mass expressed in gram is called<br>​
Elan Coil [88]

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gram atomic mass

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2 years ago
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