O Brasil está liderando os casos de dengue no mundo. Especialistas vêm reforçando o papel do...

Brazil is leading the world in dengue cases. Experts are reinforcing the role of mosquito repellent in reducing the risk of contracting arboviruses. The different active ingredients, DEET, icaridin, or IR3535, confuse the receptors on the mosquitoes' antennae, causing them to no longer be attracted by the natural odor of the skin. Observe the planar structural formula of DEET, a substance used as an insect repellent: Based on the analysis of this chemical structure, it can be seen that DEET belongs to the following organic functional group: a) amide b) amine c) ether d) ketone e) ketone-amine

The Iconic Bass Riff That NOBODY Can Play
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The Iconic Bass Riff That NOBODY Can Play

(UFRGS) The left column below presents five molecular species that have the element...
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(UFRGS) The left column below presents five molecular species that have the element...

(IDECAN-2025) A circular pool has an area of 27 m². An LED strip will be installed...
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(IDECAN-2025) A circular pool has an area of 27 m². An LED strip will be installed...

(UFRGS) Três cargas elétricas puntiformes idênticas, Q1, Q2 e Q3, são mantidas fixas em suas.
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(UFRGS) Três cargas elétricas puntiformes idênticas, Q1, Q2 e Q3, são mantidas fixas em suas.

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Intro to Chemistry, Basic Concepts - Periodic Table, Elements, Metric System & Unit Conversion

Emergency Door Opening Without Key Just 2 minute 😱 Billions Of People Don't Know This Secret!
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Emergency Door Opening Without Key Just 2 minute 😱 Billions Of People Don't Know This Secret!

Typical Soviet Apartment Tour (How Russian People REALLY Live)
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Typical Soviet Apartment Tour (How Russian People REALLY Live)

(G1 – cftmg 2008) Duas esferas A e B movem-se ao longo de uma linha reta, com velocidades constantes
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(G1 – cftmg 2008) Duas esferas A e B movem-se ao longo de uma linha reta, com velocidades constantes

(FGV-SP) The use of fossil fuels, gasoline and diesel, for vehicular purposes results in...
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(FGV-SP) The use of fossil fuels, gasoline and diesel, for vehicular purposes results in...

(UPE 2017) João is looking to fence in a triangular plot of land he bought in the countryside. He...
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(UPE 2017) João is looking to fence in a triangular plot of land he bought in the countryside. He...

Física - Lei de Coulomb - Força Elétrica (UFPE)
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Física - Lei de Coulomb - Força Elétrica (UFPE)

(ENEM-2025) There is a bike path around a circular lagoon with a radius of 1 km. Due to...
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(ENEM-2025) There is a bike path around a circular lagoon with a radius of 1 km. Due to...

The Comprehensive Map of Medicine
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The Comprehensive Map of Medicine

If You Have A Bad Memory, I’ll Help You Fix It In 28 Minutes
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If You Have A Bad Memory, I’ll Help You Fix It In 28 Minutes

How To Draw Lewis Structures
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How To Draw Lewis Structures

(UEL-PR) Um motorista dirige um automóvel a 72 km/h quando percebe que o semáforo a sua frente está
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(UEL-PR) Um motorista dirige um automóvel a 72 km/h quando percebe que o semáforo a sua frente está

Why you can't comb a hairy ball, and why we care
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Why you can't comb a hairy ball, and why we care

IDECAN - 2021 - Professor de Ensino Básico, Técnico e Tecnológico (IF CE)/Química/Química Geral
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IDECAN - 2021 - Professor de Ensino Básico, Técnico e Tecnológico (IF CE)/Química/Química Geral

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(FEI-SP) - Cinemática

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ADHD Child vs. Non-ADHD Child Interview