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3 years ago

Which term best describes the element lanthanum? nonmetal inner transition metal transuranium radioactive

Chemistry

1 answer:

brilliants [131]3 years ago

8 0

Answer:

Inner transition metal.

Explanation:

Lanthanum belongs to the lanthanides or rare earths which are a part of the transition group of elements.

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Dima020 [189]

The correct answer is b hope this helps air

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2 years ago

Number one and atom of element x contains 15 electrons and 16neutrons.

Sladkaya [172]

Answer:

a) 30.97

b) 3s² 3p²

I hope it's helps you

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3 years ago

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Juliette [100K]

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3 years ago

Nitroglycerine decomposes violently according to the chemical equation below. What mass of carbon dioxide gas is produced from t

AveGali [126]

Answer : The mass of $CO_2$ produced is, 7.74 grams

Solution : Given,

Mass of $C_3H_5(NO_3)_3$ = 13.3 g

Molar mass of $C_3H_5(NO_3)_3$ = 227 g/mole

Molar mass of $CO_2$ = 44 g/mole

First we have to calculate the moles of $C_3H_5(NO_3)_3$ .

$\text{ Moles of }C_3H_5(NO_3)_3=\frac{\text{ Mass of }C_3H_5(NO_3)_3}{\text{ Molar mass of }C_3H_5(NO_3)_3}=\frac{13.3g}{227g/mole}=0.0586moles$

Now we have to calculate the moles of $CO_2$

The balanced chemical reaction is,

$4C_3H_5(NO_3)_3\rightarrow 12CO_2(g)+6N_2(g)+10H_2O(g)+O_2(g)$

From the reaction, we conclude that

As, 4 mole of $C_3H_5(NO_3)_3$ react to give 12 mole of $CO_2$

So, 0.0586 moles of $C_3H_5(NO_3)_3$ react to give $0.0586\times \frac{12}{4}=0.176$ moles of $CO_2$

Now we have to calculate the mass of $CO_2$

$\text{ Mass of }CO_2=\text{ Moles of }CO_2\times \text{ Molar mass of }CO_2$

$\text{ Mass of }CO_2=(0.176moles)\times (44g/mole)=7.74g$

Thus, the mass of $CO_2$ produced is, 7.74 grams

4 0

3 years ago

How many GRAMS of H2 would you need to produce 2.5 mol NH3?

s344n2d4d5 [400]

I’m not 100% sure that this is the answer, but I got 5g

Explanation:

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3 years ago