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4 years ago

Which element has an atomic number of 6? lithium boron carbon oxygen

Chemistry

2 answers:

damaskus [11]4 years ago

6 0

Hi there, the correct answer is carbon.

son4ous [18]4 years ago

5 0

Carbon's atomic number is 6

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SICL4 + H2O sio2 hcl

atroni [7]

Do you want this equation balanced?

If so, it would be

SiCl4 + 2H2O ---> SiO2 + 4HCl

5 0

3 years ago

Write the charge and full ground-state electron configuration of the monatomic ion most likely to be formed by each:

Sladkaya [172]

Answer:

Part A:

Charge is $P^{3-}$

Configuration is $1s^2 2s^22p^63s^23p^6$

Part B:

Charge is $Mg^{2+}$

Configuration is $1s^2 2s^22p^6$

Part C:

Charge is $Se^{2-}$

Configuration is $1s^2 2s^22p^63s^23p^64s^23d^{10}4p^6$

Explanation:

Monatomic ions:

These ions consist of only one atom. If they have more than one atom then they are poly atomic ions.

Examples of Mono Atomic ions: $Na^+, Cl^-, Ca^2^+$

Part A:

For P:

Phosphorous (P) has 15 electrons so it require 3 more electrons to stabilize itself.

Charge is $P^{3-}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^63s^23p^6$

Part B:

For Mg:

Magnesium (Mg) has 12 electrons so it requires 2 electrons to lose to achieve stable configuration.

Charge is $Mg^{2+}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^6$

Part C:

For Se:

Selenium (Se) has 34 electrons and requires two electrons to be stable.

Charge is $Se^{2-}$

Full ground-state electron configuration of the mono atomic ion:

$1s^2 2s^22p^63s^23p^64s^23d^{10}4p^6$

8 0

3 years ago

Which oxide(s) of manganese have a mass percent of the metal that is greater than 50%?MnO MnO2 Mn2O3All of these102

Hunter-Best [27]

Answer:

All of these

Explanation:

In MnO:

mass of Mn = 55 g (as 1 mole of Mn weighs 55 g)

mass of O = 16 g (as 1 mole of O weighs 16 g)

The mass percent of metal Mn= $\frac{55}{55+16}\times100=\frac{55}{71}\times100=77.46$

In MnO2:

mass of Mn = 55 g

mass of O = 2*16 = 32 g

The mass percent of metal Mn= $\frac{55}{87}\times100=63.22$

In Mn2O3:

mass of Mn = 2*55 = 110 g

mass of O = 3*16 = 48 g

The mass percent of metal Mn= $\frac{110}{158}\times100=69.62$

In all the cases the mass percent of metal is greater than 50.

5 0

3 years ago

If neon has an atomic number of 10 and an atomic mass of 20, it has ________ neutron(s) in its nucleus

Troyanec [42]

Atomic mass = number of protons + number of neutrons.

So the number of neutrons = Atomic mass - number of protons.

Atomic number = number of protons in the atom.

Therefore number of neutrons in neon = 20 - 10 = 10.

Answer is 10 neutrons..

8 0

3 years ago

Read 2 more answers

What type of reaction is this? *<br> 2FeBr3 → 2Fe + 3Br2

victus00 [196]

Answer:

Combustion reaction

Explanation:

8 0

3 years ago