2 years ago

Which substance can be broken down by chemical means?

1 answer:

7 0

The substance that can be broken down by chemical means from the choices given is CO (Carbon monoxide). Carbon monoxide is a compound made up of carbon and oxygen and can therefore be broken by chemical means.

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How many atoms are in a sample of 175 grams of sodium (Na)? The answer needs to be <br> a x 10^b

ValentinkaMS [17]

Atomic mass Sodium ( Na ) = 22.98 u.m.a

22.98 g ----------------- 6.02x10²³ atoms
175 g ------------------- ?? atoms

175 x ( 6.02x10²³) / 22.98 =

4.58x10²⁴ atoms of Na

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3 years ago

Write a chemical equation for LiOH(aq) showing how it is an acid or a base according to the Arrhenius definition.

goldenfox [79]

Answer:

LiOH(aq) → Li⁺(aq) + OH⁻(aq).

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2 years ago

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3 years ago

A medicine is given 73 grains ap/lbs. of patient per dose. The patient weighs 65.7 kilograms. how many drams ap should the apoth

erastova [34]

10,573.4

Explanation:

Given parameters:

Dosage per patient = 73ap/lbs

Weight of patient = 65.7kg

Unknown:

Amount of grams/ap to be given to the patient;

Solution:

Since our final answer should be expressed in grams, let us convert all units into grams.

1000g = 1kg

Converting 65.7kg to g = 65.7 x 1000 = 65700g

73ap/lbs;

1lb = 453.6g

73ap/lbs x $\frac{1lb}{453.6g}$ = 0.161ap/g

Now,

For a 65700g person, the number of grains app required;

65700 x 0.161 = 10,573.4grains ap per dose

learn more:

Mass brainly.com/question/3764212

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3 years ago

PLEASE ANSWER WITH WORK!! BIG POINTS!

Gala2k [10]

Answer: Multiply the volume and pressure and divide the product by the temperature and the molar gas constant to calculate moles of the hydrogen gas. In the example, the amount of hydrogen is 202,650 x 0.025 / 293.15 x 8.314472 = 2.078 moles.

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3 years ago