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3 years ago

Which element has the same number of valence electrons as bromine

Chemistry

1 answer:

steposvetlana [31]3 years ago

8 0

Answer:

The element that has the same number of valence electrons as bromine (Br), is chlorine (Cl).

Explanation:

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Please help me, Thank you!

babymother [125]

Answer:

amount of charge

Explanation:

Oxygen and sulfur are both in Group 16, which means they have a -2 charge. They have two more electrons than protons, making the charge of the ion negative.

Hope that helps.

4 0

3 years ago

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__is when two genetic sequences bind together because of the hydrogen bonds that form between the base pairs

Anettt [7]

Answer:

I would say that it is the bond called complementary hydrogen bonds

Explanation:

The nucleotides in a base pair are complementary which means their shape allows them to bond together with hydrogen bonds. The A-T pair forms two hydrogen bonds. The C-G pair forms three. The hydrogen bonding between complementary bases holds the two strands of DNA together.

6 0

3 years ago

Lithium iodide has a lattice energy of −7.3×102kJ/mol and a heat of hydration of −793kJ/mol. Find the heat of solution for lithi

Anna007 [38]

Delta H of solution = -Lattice Energy + Hydration
Delta H of solution=- (-730)+(-793) 
Delta H of solution= -63kJ/mol 

Now we find moles of LiI: 
10gLiI/133.85g=.075moles 
multiply moles to the delta H of solution to cross cancel moles. .75moles x -64kJ/mol =4.7

7 0

3 years ago

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Help me out w this plz

zhannawk [14.2K]

Cant see the picture

4 0

3 years ago

Question 6 (3 points)

olga55 [171]

Answer:

Explanation:

Given parameters:

Molarity of KOH = 0.26M

Volume of H₂SO₄ = 19.76mL

Molarity of H₂SO₄ = 0.20M

Unknown:

Volume of KOH = ?

Solution:

This is a neutralization reaction in which an acid reacts with a base to produce salt and water:

H₂SO₄ + 2KOH → K₂SO₄ + 2H₂O

We solve from the known to the unknown in the reaction.

The known is the acid and from there we can find the number of moles of the acid to be completely neutralized:

Number of moles of acid = molarity x volume

Number of moles of acid = 19.76 x 0.20 = 3.95mol

From the balanced reaction equation:

1 mole of acid reacts with 2 moles of the bases KOH

3.95mole of acid would react with 3.95moles x 2 of the base

Number of moles of reacting base = 7.90moles

To find the volume of base;

Volume of base = $\frac{number of moles of base}{molarity}$

Volume = $\frac{7.90}{0.26}$ = 30.40mL

Learn more:

Neutralization brainly.com/question/6447527

#learnwithBrainly

8 0

3 years ago