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3 years ago

The elements fluorine chlorine and Iodine are all part of the same ___on the periodic table

Chemistry

2 answers:

elena-14-01-66 [18.8K]3 years ago

6 0

They are in the same group on the periodic table.

Aleksandr-060686 [28]3 years ago

6 0

they're on the same group

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An element, X, can form a chloride (XCl3) and an iodide (XI3). The chloride can be converted quantitatively into the iodide when

Arlecino [84]

Answer : The chemical symbol for this element is, (La)

Explanation : Given,

Mass of $XCl_3$ = 0.760 g

Mass of $XI_3$ = 1.610 g

The given chemical reaction is:

$2XCl_3+3I_2\rightarrow 2XI_3+3Cl_2$

First we have to calculate the moles of $XCl_3$ and $XI_3$ .

$\text{Moles of }XCl_3=\frac{\text{Mass of }XCl_3}{\text{Molar mass of }XCl_3}$

Molar mass of Cl = 35.5 g/mole

Let the molar mass of element 'X' be, M

$\text{Moles of }XCl_3=\frac{0.760}{[M+3(35.5)]}$

and,

$\text{Moles of }XI_3=\frac{\text{Mass of }XI_3}{\text{Molar mass of }XI_3}$

Molar mass of I = 126.9 g/mole

Let the molar mass of element 'X' be, M

$\text{Moles of }XI_3=\frac{1.610}{[M+3(126.9)]}$

From the balanced chemical reaction we conclude that,

The moles of ratio of $XCl_3$ and $XI_3$ is, 1 : 1

That means,

$\frac{0.760}{[M+3(35.5)]}=\frac{1.610}{[M+3(126.9)]}$

$\frac{0.760}{[M+106.5]}=\frac{1.610}{[M+380.7]}$

$M=138.667g/mol$

From this we conclude that the element (X) is lanthanum (La) that has molecular weight, 138.667 g/mol.

Hence, the chemical symbol for this element is, (La)

6 0

4 years ago

Based on the tiles shown, how many meters per second is equivalent to 72 kilometers per hour?

bija089 [108]

We are asked to convert the value 72 kilometers per hour to units of meters per second. We need conversion factors to multiply to this value. We convert as follows:

72 km / hr ( 1000 m / 1 km ) ( 1 hr / 3600 s ) = 20 m/s --->OPTION B

3 0

3 years ago

Read 2 more answers

Please help me with this answer

Dmitry [639]

Answer:

1) Hom DOMINANT

2) Hom recessive

3) Hetero DOMINANT

4) Hom DOMINANT

5) Hetero DOMINANT

6) Hom recessive

Explanation:

8 0

3 years ago

In which quadrant does the point (-11, -22) lie?

Nuetrik [128]

I believe it lies in the 3rd Quadrent

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3 years ago

What form of energy causes an ice cube to melt

zalisa [80]

Answer:

Thermal

Explanation:

When something heats up its atoms become further apart making it melt when something heats up or gets heat or loses heat that's thermal energy

6 0

3 years ago