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3 years ago

 ¿Qué pasa con aquellas enfermedades para las cuales aún no hay vacunas?

Chemistry

1 answer:

olga55 [171]3 years ago

5 0

Answer:

There are many infectious diseases for which we don't have an effective treatment. In these cases, the scientific community is working to understand the molecular mechanisms used by these pathogens to attack human cells. From a medical perspective, it is imperative to use treatments to improve the patient's life quality.

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What are the requirements for combustion of a candle?

cestrela7 [59]

For a candle to burn, it requires a spark, which provides the activation energy for the oxidation reaction of the hydrocarbon making the candle.
It also requires oxygen to facilitate the oxidation of the hydrocarbon.
Therefore the two main requirements of combustion of a candle are oxygen and a spark (or an initial flame)

7 0

3 years ago

The Ksp of calcium carbonate in water at 25 °C is 2.25 x 10-8. CaCO3(s) <----> Ca2+ (aq) + CO3 2- (aq) What is favored at

seraphim [82]

Answer:

the solubility of CaCO3 is 0.015g/l 25 °C

is favored at equilibrium

Explanation:

The Ksp of calcium carbonate in water at 25 °C is 2.25 x 10-8. CaCO3(s) <----> Ca2+ (aq) + CO3 2- (aq) What is favored at equilibrium?

solubility is the property of a solute to dissolve in a solvent(liquid, gas ) to form a solution(soution can be saturated ,unsaturated, or supersaturated)

CaCO3(s) <----> Ca2+ (aq) + CO3 2- (aq)

in partial dissociation , we can say

2.25x 10^-8= $Ca^{2+} +CO^{2-}_{3} }$

let Ca^2+=CO3^-2=S

2.25x10^-8=S*S

S^2=2.25x10^-8

S=0.00015mol/L

Converting that to g/l

the relative molecular mass of CaCO3=100g/mol

0.00015*100g/mol

0.015g/l

the solubility of CaCO3 is 0.015g/l @room temperature

is favored at equilibrium

5 0

3 years ago

Write the detailed structure of<br><br> A. C2H6 B. C4H10 C. C6H14 D. C7H16

STALIN [3.7K]

H₃C-CH₃

this is called ethane

H₃C-CH₂-CH₂-CH₃

this is called butane

C.H₃C-CH₂-CH₂-CH₂-CH₂-CH₃

this is called hexane

H₃C-CH₂-CH₂-CH₂-CH₂-CH₂-CH₃

this is called heptane

8 0

3 years ago

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What is the atomic mass of one mole of H? _______g/mol

Nikolay [14]

The answer is 1.008g/mol

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4 years ago

1. What does it mean for a substance to be soluble?

Anni [7]

Answer:

Solubility is a chemical property referring to the ability for a given substance, the solute, to dissolve in a solvent. It is measured in terms of the maximum amount of solute dissolved in a solvent at equilibrium. ... Certain substances are soluble in all proportions with a given solvent, such as ethanol in water.

Explanation:

3 0

4 years ago

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