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3 years ago

Please someone help mee

Chemistry

1 answer:

Nikitich [7]3 years ago

8 0

Answer:

13.9kj/mol

Explanation:

$h = 891 -(393.5 +2*241.8)=1768.1=13.9kj/mol$

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Based on the name, which substance is a covalent compound?

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QUICK ANSWER

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2 years ago

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What are the effects on the bodies of water? use terms algal bloom, dead zone and hypotoxic

Anna35 [415]

Water pollution is defined as the mixing of water with unwanted substances and that makes water unsafe.

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sediment from improperly managed construction sites,

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2 years ago

¿Cómo se escribe la fórmula molecular (orden de los iones)?

cluponka [151]

Answer:

A la izquierda el catión y a la derecha el anión.

Explanation:

¡Hola!

En este caso, y basado en las normas IUPAC para la escritura de las fórmulas moleculares, es necesario primero escribir el catión a la izquerda, seguido del anión a la derecha, tal y como se muestra en los siguientes ejemplos, recordando que el catión es el ion cargado positivamente y el anión, negativamente:

$K^+Cl^-\\\\Ag_2^+(SO_4)^{2-}$

Los cuales son cloruro de potasio y sulfato de plata respectivamente. También es necesario tener en cuenta que los metales tienden a ser cationes por su capacidad de perder electrones, mientras que los no metales a ganarlos y por ende resultar como aniones.

¡Un gusto ayudarte!

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3 years ago

For the Earth's atmosphere, section number two in the pie graph BEST represents the percentage of A) argon B) oxygen C) nitrogen

larisa86 [58]

-Oxygen

According to Google these are the percentages of the Earths Atmosphere

1 78% - Nitrogen

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4 0.3 - Carbon Dioxide with very small percentage of other elements.

3 0

3 years ago

Another one please help

ladessa [460]

Possibly C or D i wanna say sorry if i’m wrong

4 0

2 years ago