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2 years ago

If Bromine has a charge of 1-, how many electrons does it have?

Chemistry

1 answer:

fiasKO [112]2 years ago

4 0

Answer:

36 electrons

Explanation:

But Bromine anion with a charge of -1 has one extra electron so 35 +1 = 36 electrons.

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How do you separate sand and zinc?

taurus [48]

Answer:

By using magnet.

Explanation:

Put sand and zinc in the bowl.

Take a magnet an bring it close to the bowl.

The zinc from the sand will be attracted towards the magnet.

In this way it will be separated.

8 0

2 years ago

For centuries, sailors used tree sap (pitch) to seal the spaces between the planks on wooden boats. Explain why pitch worked wel

o-na [289]

Tree sap is a viscoelastic polymer, which means it's not really a solid but a very viscous (sticky) fluid. It's fluidity ensures that it can properly seal the spaces between the planks on wooden boats. Not only that, the pitch sap is hydrophobic - it is water resistant as well.

5 0

3 years ago

Hands on mole activity

Amanda [17]

Explanation:

one mole= 6.02x10^23

Everything going from a mole will always be multiplied and everything going into mole will be divided.

4 0

3 years ago

The shielding of electrons gives rise to an effective nuclear charge, Zeff, which explains why boron is larger than oxygen. Esti

nadezda [96]

The solution would be like this for this specific problem:

(atomic number) - (core electrons)

Boron:

Atomic number: 5
Core electrons: 2

Boron will have the following: 2 core electrons and 3 valence electrons.
(atomic number) - (core electrons)------> (5) - (2) = +3

Oxygen: 
Atomic number: 8 
Core electrons: 2

Boron will have the following: 2 core electrons and 6 valence electrons. 
(atomic number) - (core electrons)------> (8) - (2) = +6 |

So the answer would be +3 and +6.

I hope this helps and if you have any further questions, please don’t hesitate to ask again.

3 0

3 years ago

The empirical formula of pyrogallol is C2H2O. Its molar mass is 126 g mol-1. What is the molecular formula?C4H4O2C2H6O3C6H6O3C2H

VARVARA [1.3K]

Answer:

The molecular formula of pyrogallol is: C6H6O3

Explanation:

Step 1: Data given

Empirical formula of pyrogallol is C2H2O

Molar mass of pyrogallol = 126 g/mol

Molar mass of Carbon (C) = 12 g/mol

Molar mass of hydrogen (H) = 1.01 g/mol

Molar mass of oxygen (O) = 16 g/mol

Step 2: Calculate molar mass of the empirical formula

2*12 + 2*1+ 16 = 42 g/mol

Step 3: Calculate the molecular formula

To find the molecular formule , we should multiply the empirical formula by n

n can be found by dividing molar mass of pyrogallol by the molar mass of the empirical formula

n = 126 g/mol / 42 g/mol ≈ 3

We should mulitply the empirica lformula by 3

3*(C2H2O) gives C6H6O3

if we calculate the molar mass now:

6*12 +6*1 + 3*16 = 126 g/mol

The molecular formula of pyrogallol is: C6H6O3

6 0

2 years ago