All categories

3 years ago

Arrange the following set of atoms in order of decreasing atomic size: Sn, I, Sr

Chemistry

1 answer:

vampirchik [111]3 years ago

3 0

Atomic size
Sr>Sn>I

A)
B)

You might be interested in

An object accelerates 8.2 m/s2 when a force of 20.1 Newton's is applied to it. What is the mass of the object?

Shalnov [3]

Hey it's me again haha!

the answer to your question is:

answer: so f=20.1

a=8.2

m=?

f=ma

20.1 = 8.2*m in

20.1/8.2=m

so the answer is around 2.45 something!
also i'm sorry this question had be stumbled!

5 0

3 years ago

Read 2 more answers

Hc2h3o2(aq)+h2o(l)⇌h3o+(aq)+c2h3o−2(aq) kc=1.8×10−5 at 25∘c part a if a solution initially contains 0.260 m hc2h3o2, what is the

Cloud [144]

Answer : The equilibrium concentration of $H_3O^+$ at $25^oC$ is, $2.154\times 10^{-3}m$ .

Solution : Given,

Equilibrium constant, $K_c=1.8\times 10^{-5}$

Initial concentration of $HC_2H_3O_2$ = 0.260 m

Let, the 'x' mol/L of $H_3O^+$ are formed and at same time 'x' mol/L of $HC_2H_3O_2$ are also formed.

The equilibrium reaction is,

$HC_2H_3O_2(aq)+H_2O(l)\rightleftharpoons H_3O^+(aq)+C_2H_3O_2^-(aq)$

Initially 0.260 m 0 0

At equilibrium (0.260 - x) x x

The expression for equilibrium constant for a given reaction is,

$K_c=\frac{[H_3O^+][C_2H_3O_2^-]}{[HC_2H_3O_2]}$

Now put all the given values in this expression, we get

$1.8\times 10^{-5}=\frac{(x)(x)}{(0.260-x)}$

By rearranging the terms, we get the value of 'x'.

$x=2.154\times 10^{-3}m$

Therefore, the equilibrium concentration of $H_3O^+$ at $25^oC$ is, $2.154\times 10^{-3}m$ .

4 0

3 years ago

if you are asked to help the laboratory assistant in separating the mixture which method will you see?

FromTheMoon [43]

Answer:

use secondary data. the normal method to use

3 0

3 years ago

N which changes of state do atoms lose energy? Check all that apply.

Alex73 [517]

When liquid state is being converted to solid state, atoms come closer to each other and their speed of movement also decreases. Instead of moving about in the substance, they are only able to vibrate about their positions in solid. Hence, this change leads to loss of energy. Similarly, atoms loose energy when state changes from gas to liquid.

3 0

3 years ago

How much mass does 8.46 moles of XeF6 gas have in grams?

Genrish500 [490]

2075g of XeF₆ is present in 8.46 moles of XeF₆

<u>Explanation:</u>

Given:

XeF₆ is xenon hexafluoride

number of moles of XeF₆ is 8.46

Mass of XeF₆ present, m = ?

We know,

Molecular weight of XeF₆, M is 245.28 g/mol

and

number of moles, n = mass of XeF₆ present / molecular weight of XeF6

$8.46 = \frac{m}{245.28} \\\\m = 2075g$

Therefore, 2075g of XeF₆ is present in 8.46 moles of XeF₆

3 0

3 years ago