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krek1111 [17]
3 years ago
6

Exercícios: Fazer a distribuição em subníveis, dizer qual o de maior energia e a configuração da camada de valência; fazer a dis

tribuição em camadas: 1 - 12 Mg (Magnésio) 2 - 35 Br (Bromo) 3 - 47 Ag (Prata) 4 - 55 Cs (Césio) 5 – 14 Si (Silício) 6 – 30 Zn (Zinco) 7 – 92 U (Urânio) 8 – 19 K (Potássio)
Chemistry
1 answer:
AURORKA [14]3 years ago
6 0
Can u write that in English
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In which layer of Earth’s interior does convection occur?
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Answer:

The mantel. I'm pretty sure.

Explanation:

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Calcium carbide, CaC2, reacts with water to form calcium hydroxide and the flammable gas ethyne (acetylene) in the reaction: Wha
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Answer:

1 mole of CaC₂ will produce 26g of C₂H₂ or 64.1g of CaC₂ will produce 26g of C₂H₂

Explanation:

Hello,

To solve this question, we'll require a balanced chemical equation of reaction between calcium carbide and water.

Equation of reaction

CaC₂ + 2H₂O → Ca(OH)₂ + C₂H₂

Molar mass of calcium carbide (CaC₂) = 64.1g/mol

Molar mass of water (H₂O) = 18g/mol

Molar mass of calcium hydroxide (Ca(OH)₂) = 74g/mol

Molar mass of ethyne (C₂H₂) = 26g/mol

From the equation of reaction, 1 mole of CaC₂ will produce 1 mole of C₂H₂

1 mole of CaC₂ = mass / molar mass

Mass = 1 × 64.1

Mass = 64.1g

1 mole of C₂H₂ = mass / molar mass

Mass = 1 × 26

Mass = 26g

Therefore, 1 mole of CaC₂ will produce 26g of C₂H₂

Note: this is a hypothetical calculation since we were not given the initial mass of CaC₂ that starts the reaction

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Read the excerpt from a reading passage titled "Matter and Energy: Evaporation and Condensation." Condensation An example of con
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During night time, when the temperature is lowered, the blades of grass become cool. As a result, the vapor molecules slow down and eventually come close to each other. They join together to form liquid water which gets deposited on the blades in the form of dew drops.

The only option that explains this process is option C.

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