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Novay_Z [31]
3 years ago
8

Some headache medicines are fine powders that are dissolved in water and then ingested. These medicines claim they work faster t

han other medicines. Could this be true? Why or Why not?
A. False: Chemicals react at the same rate in the body, as determined by body temperature.

B. False: These would actually slow the reaction because it would become less concentrated

C. True: A Solid will react quicker in the liquid environment of the stomach than a gas or liquid

D. True: A fine powder dissolves quickly, this solution can more quickly be absorbed and begin working
Chemistry
2 answers:
trasher [3.6K]3 years ago
8 0
The answer should be D
ryzh [129]3 years ago
6 0

i mean it can be true and it cant at the same time. i mean medicine doesn't always work on a person. but it is said that medicine that is in powder form is more efficient.

but i believe its D or A

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Calculate AGrxn for this equation, rounding your
Agata [3.3K]

Answer: \Delta G_{rxn}=130.19J

Explanation:

The balanced chemical reaction is,

CaCO_3(s)\rightarrow CaO(s)+CO_2(g)

The expression for Gibbs free energy change is,

\Delta G_{rxn}=\sum [n\times \Delta G_(product)]-\sum [n\times \Delta G_(reactant)]

\Delta G_{rxn}=[(n_{CO_2}\times \Delta G_{CO_2})+(n_{CaO}\times \Delta G_{CaO})]-[(n_{CaCO_3}\times \Delta G_{CaCO_3})]

where,

n = number of moles

Now put all the given values in this expression, we get

\Delta G_{rxn}=[(1\times -394.4)+(1\times -604.17)]-[(1\times -1128.76)]

\Delta G_{rxn}=130.19J

Therefore, the gibbs free energy for this reaction is, +130.19 kJ

4 0
3 years ago
Nail polish remover containing acetone was spilled in a room 7.2 m × 5.8 m × 3.9 m. Measurements indicated that 6,400 mg of acet
sergeinik [125]

Volume of room  = 7.2 m \times 5.8 m \times  3.9 m

= 162.864 m^{3}

Now, according to conversion factor, convert 6,400 mg to micrograms

Since, 1 mg is equal to 1000 microgram.

Therefore, 6,400 mg  = 6,400 \times 1000

= 6,400,000 micrograms of acetone.

To calculate concentration of acetone, divide volume and evaporated amount of acetone in micrograms.

Thus,

Concentration of acetone  = \frac{6,400,000 microgram}{162.864 m^{3}}

= 39296.5910 microgram per cubic meter or 3.92\times 10^{4} \mu g/m^{3}\simeq 4.0\times 10^{4} \mu g/m^{3}

Hence, concentration of acetone is equal to 4.0\times 10^{4} \mu g/m^{3}

7 0
3 years ago
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Hydrogen bonding occurs when hydrogen is bonded to an oxygen or nitrogen or fluorine atom. In this case, the hydrogen atom in a hydrogen fluoride molecule will be able to bond to the fluoride atom of another hydrogen fluoride molecule, forming a hydrogen bond.

6 0
2 years ago
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horrorfan [7]
2) 273k is your answer. You're welcome.
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Which of the following describes what scientists expect to happen every time under certain conditions?
Ber [7]
I believe it is d. scientific law
7 0
3 years ago
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