All categories

4 years ago

Write the electron dot structures for the following elements:

Chemistry

1 answer:

Evgesh-ka [11]4 years ago

7 0

Answer:

Drawings of Lewis structure Are attached for your elements

Explanation:

Please open the attachment

You might be interested in

A gallon of paint covers 350 square feet.

trapecia [35]

Answer:

2,137... gallons

Explanation:

(160+140+14x16x2)/350=2,137...

4 0

2 years ago

In your own words right a definition of earth core

Rasek [7]

The Earth's core is the part of Earth in the middle of our planet. It has a solid inner coreand a liquid outer core.

7 0

3 years ago

Read 2 more answers

Origin of name of aluminun

Alex73 [517]

From Latin word alumen, mean alum

3 0

3 years ago

Calculate the specific heat for as air if 1500.0 joules are required to raise the temperature of 50.0g from 0.0c to 40.0c

Law Incorporation [45]

The specific heat, c is 0.75 J/g°C

<u>Explanation:</u>

Heat or Energy, Q = 1500J

Mass, m = 50g

T1 = 0°C

T2 = 40°C

Specific Heat, c = ?

We know,

Q = mcΔT

Q = mc(T2-T1)

1500 = 50 X c X (40-0)

1500 = 50 X c X 40

c = 1500/ 2000

c = 0.75 J/g°C

Therefore, the specific heat, c is 0.75 J/g°C

7 0

3 years ago

A 1.000 g sample of an unknown hydrate of cobalt chloride is gently dehydrated. The resulting mass is 0.546 g. The cobalt is iso

ira [324]

Answer:

Explanation:

From the 1 g sample you have:

0.546 grams of cobalt chloride

1-0.546=0.454 grams of water

Now:

1) The salt

Of the 0.546 g, 0.248 g are cobalt (Mr=58.9) and the rest id Cl (Mr=35.45):

$n_{Co}=\frac{0.248 g}{58.9 g/mol}=4.21*10^{-3}mol$

$n_{Cl}=\frac{0.298 g}{35.45g/mol}=8.4*10^{-3}mol$

Dividing:

$\frac{n_{Cl}}{n_{Co}}=\frac{8.4*10^{-3}mol}{4.21*10^{-3}mol}=2$

So the molecular formula will be:

$CoCl_2$

2) The water

The water's molecular weight is M=18 :

$n_{w}=\frac{0.454g}{18g/mol}=0.025 mol$

Bonding with the Co:

$\frac{n_{w}}{n_{Co}}=\frac{0.025mol}{4.21*10^{-3}mol}=6$

The complete formula of the hydrate:

$CoCl_2*6 H_2O$

8 0

4 years ago