3 years ago

What is volcanoes be my friend

Chemistry

2 answers:

andreev551 [17]3 years ago

5 0

Volcanos are mountains with lava inside I’ll be you friend

Bess [88]3 years ago

4 0

....wut?.......is that a book or something??

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Which of the following best describes a mole as used in chemistry?

bazaltina [42]

Answer: a very large number of objects

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2 years ago

Please help make sure its correct thanks

Wewaii [24]

The empirical formula of metal iodide : CoI₃(Cobalt(III) Iodide)

<h3>Further explanation</h3>

13.02 g sample of Cobalt , then mol Co(MW=58.933 g/mol) :

$\tt mol=\dfrac{mass}{Ar}=\\\\mol=\dfrac{13.02~g}{58.933}\\\\mol=0.221$

Mass of metal iodide formed : 97.12 g, so mass of Iodine :

$\tt =mass~metal~iodide-mass~Cobalt\\\\=97.12-13.02\\\\=84.1~g$

Then mol iodine (MW=126.9045 g/mol) :

$\tt \dfrac{84.1}{126.9045}=0.663$

mol ratio of Cobalt and Iodine in the compound :

$\tt 0.221\div 0.663=1\div 3$

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2 years ago

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The diagram shows three isotopes. What element is represented?

lisov135 [29]

Answer:

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How many kilograms of chlorine are in 21 kg of CF2Cl2

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You just multiply the weight of the material by the fraction of chlorine (by weight). The others are done the same way

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