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Flauer [41]
3 years ago
10

A children's liquid medicine contains 100mg of active ingredient in 5 mL. If a child should receive 200 mg of the active ingredi

ent how many mL of the medicine she's a child be given for the purpose of this question assume that these numbers are in fact
Chemistry
1 answer:
GaryK [48]3 years ago
8 0
Answer: 10ml
In this question, you are given the liquid medicine concentration (100mg/5ml) and the doses of the medicine that must be taken(200mg). You are asked how much ml of the drug needed. Then the calculation would be:

Volume of drug needed= doses of the drug / drug concentration
Volume of drug needed= 200mg / (100mg/5ml)= 10ml

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A container is filled with a mixture of helium, Xenon, and neon gases. The total pressure inside the container is 1,788 mmHg. If
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Answer: The partial pressure of Xenon in a container filled with a mixture of helium, Xenon, and neon gases and a total pressure inside the container is 1,788 mmHg with the pressure of the helium gas as 760 mmHg, the pressure of the neon gas as 200 mmHg is 828 mmHg

Explanation:

NOTE :

Dalton's law of partial pressures states that in a mixture of gases the pressure exerted by each gas is the same as that which it would exert if it alone occupied the container.

How to determine the partial pressure

Total pressure = Partial pressure of Neon + Partial pressure of Xenon + Partial pressure of helium

Partial pressure of Xenon = ? mmHg

Partial pressure of Helium = 760 mmHg

Partial pressure of Neon = 200 mmHg

Total pressure of gases = 1, 788 mmHg

Partial pressure of Xenon = Total pressure - Partial pressure of Helium - Partial pressure of Neon

Partial pressure of Xenon = 1, 788 - 760 -200

Partial pressure of Xenon = 1,788 - 960

                                           = 828 mmHg

Thus, the partial pressure of Xenon is 828 mmHg

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2 years ago
isotopes of an element will always have the same a. number of protons. b. number of neutrons. c. number of electrons. d. mass.
Nastasia [14]
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3 0
3 years ago
Calculate the number of moles of Cu in 3.8×10213.8×1021 atoms of Cu.
rosijanka [135]

Answer:

6.3×10⁻³ moles of Cu

Explanation:

The relation is, that 1 mol of particles are contained by 6.02×10²³ particles.

This is Avogadro's number that explains that: one mole determines the number of fundamental units that are contained in a constant number  but they do not depend on the type of material or the type of particle, and this quantity is 6.02 × 10²³

We can make a rule of three:

6.02×10²³ atoms are contained 1 in mol of Cu

Therefore, 3.8×10²¹ atoms will be contained in (3.8×10²¹ . 1) / NA = 6.3×10⁻³ moles

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Your boss asks you to design a room that can be as soundproof as possible and provides you with three samples of material. The o
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sample c because it has the highest absorption

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How much of the sulfur burnt is normally oxidized to hexavalent state?
jeyben [28]

I feel that it is D but I am not 100% sure sadly.

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3 years ago
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